WO2012167391A1

WO2012167391A1 - Device and process for the production of a thermoset strip in the form of a semi-honeycomb and of a thermoset honeycomb structure

Info

Publication number: WO2012167391A1
Application number: PCT/CH2012/000122
Authority: WO
Inventors: Hans Schmid
Original assignee: The Swisscore Ag
Priority date: 2011-06-10
Filing date: 2012-06-04
Publication date: 2012-12-13

Abstract

The invention relates to a device (1) for the production of a honeycomb structure (10) made of a strip material (2), where the strip material (2) contains a fibre material which is in particular made of a paper web and which has been preimpregnated with a binder that crosslinks to form a thermoset, where the device (1) has equipment for embossing thermoset strips (2e, 2f) in the form of a semi-honeycomb made of the strip material (2), where the device (1) has a bonding device (6, 34) for bonding the strips (2e, 2f) in the form of a semi-honeycomb or of honeycomb-shaped strips (2g) formed from at least two strips (2e, 2f) in the form of a semi-honeycomb, at bonding sites to form a honeycomb structure (10), and where the device (1) has means for heating the honeycomb-shaped strips (2g) or of the honeycomb structure (10) so as to harden the bonding sites. The invention further relates to a process for the production of a honeycomb structure (10).

Description

DEVICE AND METHOD FOR THE PRODUCTION OF A DUROPLASTIC SEMI-CROPPED STRIP AND A DUROPLASTIC WAVE STRUCTURE Description

The invention relates to a device for producing a honeycomb structure from a strip material. The invention further relates to a method for producing the honeycomb structure.

State of the art

It is known to produce honeycomb core materials or honeycomb structures from thermoset composite materials. Such honeycomb structures are used, for example, in the manufacture of structural elements such as doors, floors, side walls or ceiling walls. Usually, the honeycomb core material is connected on one or both sides with a cover layer so as to form a plate-shaped construction element. The honeycombs are designed as hexagonal honeycombs, which are also referred to as honeycomb honeycombs.

The document DE 3520046 AI discloses a

Production process of phenol resin-treated honeycomb structures of paper webs glued together. In this case, paper webs are provided with adhesive strips and pressed together in a first process step. In a subsequent method step, the paper webs glued together are pulled apart to form honeycomb structures. In a subsequent process step, the honeycomb structure is repeatedly dipped into a phenolic resin solvent mixture for fixing and then dried or cured in an oven in order to form a thermosetting honeycomb structure in this way. This manufacturing process partly that it is very expensive and expensive.

Document WO2008 / 148611 discloses in FIG. 4 an apparatus for producing corrugated packaging material. However, this device does not allow thermosetting, semi-honeycomb stripes or honeycomb structures to be made from such strips.

Presentation of the invention

The object of the invention is to form thermosetting honeycomb structures or precursors for thermosetting honeycomb structures, which in particular have increased stability and which preferably allow the production of advantageous lightweight walls.

This object is achieved with a device for producing a honeycomb structure from a strip material comprising the features of claim 1.

The subclaims 2 to 22 relate to further advantageous developments of the device.

The object is achieved in particular with a device for producing a honeycomb structure from a strip material, the strip material in particular containing a fiber material, and in particular consists of a paper web, which strip material is pre-impregnated with a thermoset-crosslinking binder, wherein the device comprises means for embossing thermoset, semi-honeycomb strip of the strip material, and having connecting means for connecting the semi-honeycomb strips or honeycomb strips formed of at least two half-honeycomb strips at junctions to a honeycomb structure, and wherein the device comprises means for heating the honeycomb strips or the honeycomb structure for curing the joints. The object is further achieved with a method for producing a honeycomb structure from a strip material comprising the features of claim 23.

The subclaims 24 to 27 relate to further, advantageous methods.

The object is achieved in particular with a method for producing a honeycomb structure from a strip material, which in particular comprises a fiber material, and in particular consists of a paper web, which strip material is preimpregnated with a binder crosslinking to a thermoset, wherein thermoset, semi-honeycomb-shaped strips embossed from the strip material be, with the semi-honeycomb strips or at least two half-honeycomb-shaped

Strip formed honeycomb strips are connected at connection points to a honeycomb structure, and wherein the honeycomb strips or the honeycomb structure are heated to cure the joints, in particular for subsequent curing of the connection points of the honeycomb already assembled from the strips.

The object is further achieved with a method for producing a thermosetting honeycomb structure comprising a strip material having the features of claim 28.

The object is achieved in particular with a method for producing a thermosetting honeycomb structure from a strip material, wherein the strip material in particular comprises a fiber material, and in particular consists of a paper web, which strip material is pre-impregnated with a thermoset-crosslinking binder by heating the strip material and a resulting in a thermosetting, semi-honeycomb-shaped strip is formed, wherein the strip material is exposed in sections no compressive force and / or no heating, thereby generating connection points conditions in which the binder is not or only partially crosslinked to thermoset, wherein thermoset, halbwabbenförmige strips are joined together at their junctions by heating mutually adjacent joints and subjected to a compressive force, and the joints one of at least two Subsequently, ie in particular after it has been connected with the aid of pressure and heating, hardened by heating, in particular by means of infrared radiators and / or radiators, honeycomb-shaped strip or honeycomb structure formed from half-honeycomb strips.

A half-honeycomb strip is understood to mean a strip which is shaped such that two juxtaposed and interconnected half-honeycomb strips can form a honeycomb strip or the basic element of a honeycomb structure. The strip material consists in particular essentially of a fibrous material, in particular a paper web, which is pre-impregnated with a binder which crosslinks to a duroplastic, for example a phenolic resin. Paper web is understood to mean a web of paper, the paper being a material in which fibers (a few mm to a few cm long), mostly of vegetable origin, are crosslinked. The fibers used are preferably cellulose, which is obtained, for example, from wood or waste paper. A fiber is a thin and flexible structure in relation to its length. A fibrous material is understood to mean a larger composite of fibers. The fibers may be natural fibers such as vegetable fibers, animal fibers or mineral fibers of geological origin. The fibers may be man-made fibers such as fibers of natural polymers or fibers of synthetic polymers. Fibers may also be industrially produced inorganic fibers such as glass fibers, carbon fibers, metal fibers or ceramic fibers. The fiber material can also be made of a mixture of different Fibers exist. The fiber material may be formed, for example, as a woven fabric, fleece, mesh or scrim, for example as cotton fabric, cotton fleece, glass fabric or glass fleece. In the following description and in particular in the following exemplary embodiments, the use of paper as a fiber material is described, because strip material in the form of paper webs is particularly advantageously suitable for the method according to the invention. However, the method according to the invention as well as the device according to the invention is generally suitable for fibrous material made of materials which can be impregnated with a thermosetting binder and whose mechanical properties are influenced by the applied pressure and the temperature required to form the binder into a thermoset networked, preserved or substantially preserved.

Preferably, the strip material is continuously conveyed while being heated and subjected to a pressure to cause a condensation reaction of the binder, wherein a rolling pressure exerts such a pressure on the continuously conveyed strip material that the binder penetrates into the strip

Strip material is pressed into it and that the condensation products released during the polycondensation are pressed out of the strip material such as water by passing the strip material between two intermeshing, heated, mutually rolling embossing wheels, so that the strip material is heated by the embossing wheels subjected to pressure and at the same time to a thermoset, semi-honeycomb-shaped strip is formed. The temperature and the pressure are preferably used to effect the polycondensation, so that the binder of the strip material crosslinks to the thermoset. During the polycondensation, condensation products such as water are formed. The pressure is also preferably used in order to squeeze the condensation products from the strip material, in particular to avoid blistering in the strip material. The method according to the invention has the advantage that it is possible, in particular, to form strip material consisting of a fibrous material web preimpregnated with a binder such as a paper web in a continuous process to form a thermoset, structured strip, wherein during the continuous process both the formation of the structured strip as well as the crosslinking of the binder to the thermoset takes place.

The strip material comprising the paper web is advantageously heated to a temperature between 120 ° C and 280 ° C, in particular also to a temperature between 120 ° C and 250 or 260 ° C, and in particular between 150 ° and 250 ° Celsius, and with Pressed between 10 bar and 300 bar pressure to cause the condensation reaction.

An advantageous variant of the device according to the invention comprises a transport means, such as a conveyor belt for advancing the honeycomb strips or the honeycomb structure to the means for heating. In other variants, several identical and / or different transport means, advantageously conveyor belts and / or rollers are used.

In a further variant of the device, the means for heating in a conveying direction of the honeycomb structure or the honeycomb strips are arranged following the connecting device.

In a further variant, the device has means for heating, which are aligned for radiating heat to the connection points. Preferably, the means for heating advantageously contain an infrared radiator and / or a radiator, in other embodiments also several.

In yet another advantageous variant, the device has a feeding device for semi-honeycomb strips or honeycomb strips formed from at least two half-honeycomb strips.

In one embodiment variant of the device for producing a honeycomb structure from a strip material, wherein the strip material substantially consists of a fiber material, in particular a paper web which is preimpregnated with a binder crosslinking to a thermoset, the embossing means have a first and a second embossing wheel, each having a circumferentially extending contact surface with spaced circumferentially arranged embossing teeth and recesses arranged therebetween, wherein the first and the second embossing wheel configured so mutually adapted and arranged mutually interlocking and relative to each other so moved that between the first and the second embossing wheel produces a line-shaped or area-shaped pressure point, which moves along the contact surface during the rotation of the embossing wheels in order to produce a rolling pressure point moving along the strip material eugen, as well as having a particular controllable pressure generating device which is connected to the first and second embossing wheel to generate a particular controllable pressure between the embossing wheels, and each having a drive device for driving the first and the second embossing wheel, and having a heating device for at least one of the embossing wheels, and comprising a control device, which is at least connected to at least one of the drive devices and preferably also with the pressure generating device signal to rotate the embossing wheels in the same direction in a conveying direction and about the pressure generating device and the drive devices at the pressure point a controllable To generate pressure.

In a variant of the device in which the pressure generating device is controllable, is the controllable pressure generating device signal-transmitting connected to the control device to rotate the embossing wheels counter-same in a conveying direction to generate a controllable pressure via the controllable pressure generating device and the drive devices at the pressure point.

In a further advantageous variant of the device, the means for embossing are designed to produce a section in the half-carriage-shaped strip along which the binder is not or only partially crosslinked to form a thermoset.

In a further variant of the device, the contact surface of at least one embossing wheel has at least one circumferential recess, wherein the recess is arranged and configured such that the strip material does not touch the embossing wheel along the depression to produce a portion in the strip material along which the binder is not or only partially crosslinked to a thermoset.

In a further variant of the device, the contact surfaces of both embossing wheels each have at least one recess extending in the circumferential direction, wherein the two recesses are mutually adapted and configured such that the two recesses lie opposite each other, around the strip material on both sides along the recesses not to touch.

In a further variant of the device, the embossing wheels are mutually controllably rotatable and / or mutually spaced so that at least one of the embossing wheels touches the strip material along a portion without force and / or even not touched, the strip material along this section a pressure and / or a temperature which does not or only partially crosslinks the binder to give a thermosetting plastic. In a further variant of the device, the contact surfaces are configured in such a way that the pressure point generates a higher pressure in a middle region of the strip material than in an edge region in order to push the condensation products formed in the strip material during the condensation reaction of the binder towards the edge region.

In general, the joints at which the semi-honeycomb strips are joined to the honeycomb structure are also referred to as contact points, particularly in the context of the manufacture of the semi-honeycomb strips. In an advantageous development, therefore, the joints are also those places where the binder is not or only partially crosslinked to form a thermoset.

In a further variant of the device, the means for embossing have a plurality of exchangeable embossing wheels with different diameters and / or differently extending contact surfaces and / or differently shaped embossing teeth in order to produce differently structured half-honeycomb stripes.

In a further variant of the device, the heating device is designed such that the embossing teeth of at least one embossing wheel made of a ferromagnetic material, and an induction device is arranged so as to heat the embossing teeth inductively.

In a further variant of the device, the first and / or second embossing wheel has a structured contact surface in order to effect embossing in the half-honeycomb-shaped strip.

In a further variant of the device, a separating means is provided which separates the strip material and / or the half-honeycomb-shaped and / or honeycomb-shaped strips in the direction of progression into at least two strips. In a further variant of the device The separating means separates the strip material and / or the half-honeycomb-shaped and / or honeycomb-shaped strips in the direction of progression along at least one perforated line and / or by means of cutting.

In a further variant, the device comprises a positioning device for positioning a supplied semi-honeycomb strip at the connection points with respect to a stop edge of the honeycomb structure, each connecting device having a plurality of punches which are heatable and generate a pressure, the punches being in such a way supplied , Half-honeycomb-shaped and / or honeycomb-shaped strips and the stop edge of the honeycomb structure are arranged so that the punches act at their connection points in order to effect crosslinking of the binder to the thermoset at the connection point.

In a further variant of the device, the punches have a pressing surface with a structured surface in order to effect embossing of the connection points.

In a further variant, the device has an intermediate store for temporarily storing the half-honeycomb-shaped strips, the intermediate store being arranged downstream of the means for embossing and in front of the connecting device.

In a further variant, the device has a plurality of means for embossing thermoset, semi-honeycomb-shaped strips, as well as a holding device for a roll of strip material of the total width, wherein the separating means comprises a second cutting device for synchronously cutting strip material on a width of the Roll of strip material. Each individual resulting strip can subsequently be further processed with associated means for embossing into a half-honeycomb strip.

In an advantageous method, the honeycomb strips or the honeycomb structures with min. at least one infrared radiator and / or heated with at least one radiator.

In a further advantageous method, the first and the second embossing wheel are pressed against one another with a controllable pressure force, and at least one of the torques and the pressure force can be controlled such that a controllably resulting pressure is generated by the sum of pressure force and torques at the pressure point.

In a further advantageous method, the strip material is exposed in sections no compressive force and / or no heating, thereby producing joints in the strip material, where the binder is not or only partially crosslinked to the thermoset.

In an advantageous method, the two embossing wheels are configured in such a way that they cause a pressure point moving in particular continuously in the direction of the strip material along which the pressure is exerted on the strip material, wherein the pressure point in the direction of the strip material has in particular a length between 1 mm and 10 mm , The pressure point moving continuously in the direction of progression ensures that the condensation reaction is triggered along the portion of the strip material which is exposed to this pressure point.

In an advantageous method, such a pressure is generated by the rolling movement on the strip material, that the pressure in a central region of the strip material is higher than at the edge of the strip ^¬ material, in particular laterally out of the strip material and wegzuför- NEN condensation products.

In an advantageous method, the surface of the strip material is structured so that the semi-honeycomb strip has a structured surface wherein the structured surface in particular encompasses a multiplicity of linear depressions. Such a surface structure, for example, increase the mechanical strength of the thermoset, semi-honeycomb strip.

In a further advantageous method, the strip material is preheated to a temperature between 50 ° C and 120 ° C before being fed into the embossing wheels.

In a further advantageous method, mutually spaced contact sections are produced in the strip material by exposing the strip material along the contact section to such a low temperature and / or pressure that the condensation reaction is not or only partially effected, so that the semi-honeycomb strip in its Course having mutually spaced contact sections. This is advantageously effected by the embossing wheels having depressions on their surface, so that the rolling embossing wheel does not rest against the stiffening material along this depression so that the strip material along this depression is not exposed to the pressure and / or the temperature which triggers the condensation reaction ,

In a further advantageous method, this can also be effected, for example, by the fact that the embossing wheels have no depressions on the surface thereof, the embossing wheels being controlled and / or temporarily spaced such that at least one of the embossing wheels strips the strip material along a section without

Contact with force and / or even not touched, so that the strip material along this section is exposed to a pressure and / or a temperature which does not or only partially crosslinks the binder to a thermoset. This can, for example, by a corresponding, short-term mutual rotation of the Embossing wheels and / or a short-term mutual spacing of the embossing wheels are achieved, so that the force and / or temperature caused by the embossing wheels on the stiffening material along a portion of the strip material is reduced or the force and / or temperature influence along a portion of the strip material not done anymore.

In a further advantageous method, the pressure exerted on the strip material is controlled by driving each embossing wheel individually and by controlling the torque of at least one of the embossing wheels and preferably each embossing wheel individually.

In a further advantageous method, the two embossing wheels are pressed against each other with a controllable linear force, wherein on at least one of the embossing wheels and preferably on each embossing wheel a controllable torque is effected, and wherein the linear force and the torques are so controlled that between the two embossing wheels results in a predetermined pressure acting on the strip material. In a further advantageous embodiment, the two embossing wheels are pressed against each other with a non-controllable linear force, for example with a spring force.

In a further advantageous method, a wavy, half-honeycomb-shaped strip without kinks is formed by the rolling movement.

In a further, advantageous method, the rate of the condensation reaction is influenced by a regulation of pressure, temperature and the conveying speed of the strip material, preferably such that the semi-honeycomb strip has transitioned into the thermoset final state between 0 seconds and 10 seconds after leaving the embossing wheels. In a further advantageous method, the strip material comprises at least two superposed partial strips, a first partial strip and a second partial strip, wherein the first partial strip consists of a paper web which is preimpregnated with a thermoset-crosslinking binder, and wherein the second partial strip consists of a Fiber material, in particular a paper web, which is pre-impregnated with a crosslinking agent to a thermoset binder. The second substrip could also comprise a fabric or consist of a fabric which is pre-impregnated with a thermoset-crosslinking binder.

In a subsequent method step for producing the thermosetting honeycomb structure, at least two structured strips, preferably semi-honeycomb strips, are arranged mutually adjacent to one another to form a honeycomb, in particular via a thermosetting bond or by gluing, so that a basic element of a honeycomb structure is trained. Further structured strips, preferably semi-honeycomb strips, are connected to this honeycomb structure, in particular via a thermosetting compound or by gluing, so that the honeycomb structure becomes larger and larger as a result of the successive joining of further half-honeycomb strips to the existing honeycomb structure.

In a further, particularly advantageous process, semi-honeycomb-shaped strips are used in which the condensation reaction initially or only partially takes place along their contact sections. In this case, two half-honeycomb strips are brought together to form a honeycomb that the two half-honeycomb strips are arranged adjacent to each other at their contact portions, and that in each case two mutually adjacent contact portions are heated together and such Be subjected to pressure that at the mutually adjacent contact portions a polycondensation is effected in order to firmly connect the two structured strips at the mutually adjacent contact portions on the thermosetting Diellast trained. The mutually adjacent contact sections are particularly advantageously pressed against each other with a heatable pressing device, wherein the pressing device particularly advantageously has a surface structure, in particular a line or lattice-shaped surface structure, which abuts against the contact sections during the mutual connection and generates an embossment on the contact section. This causes a particularly advantageous mutual connection and structuring of the contact portions and also advantageously increased mechanical stability of the contact portion and the honeycomb produced. ¹

The means for embossing the strip material to produce a thermoset, semi-honeycomb strip comprise two intermeshing, heated, mutually rolling embossing wheels, between which the strip material is passed so that the strip material is heated by the embossing wheels, subjected to pressure and at the same time to one semi-honeycomb strip is formed. The embossing wheels turn continuously. The strip material is advantageously also preheated before the embossing wheels. In a particularly advantageous embodiment, the pressure and the temperature and the rotational speed of the embossing wheels are monitored by sensors and controlled by actuators, so that the crosslinking of the binder to the thermoset and the formation of the thermosetting, semi-honeycomb-shaped strip can be precisely monitored and influenced.

The production method according to the invention makes it possible to enter a large number of possible strips, which are also differently structured, whereby the structured strips have, for example, a structure, Weight, width B, color or material could differ. In addition to structured strips, a multiplicity of other materials or structures can also be entered, for example a channel element having a channel. The structure of the honeycomb structure according to the invention is preferably formed from strip-shaped material containing cellulose or paper. If necessary, however, it is possible to incorporate additional materials into the honeycomb structure. As a first approximation, it can be assumed that such materials can be connected to the stop edge of the honeycomb structure, which can be fixedly connected to the stop edge of the honeycomb structure, for example by gluing.

The manufacturing device preferably comprises a feed device which can supply a structured strip to the stop device. The stop device preferably comprises an entry channel into which the structured strip can be inserted and then abutted against a stop edge of a honeycomb structure. With means for embossing a variety of possible honeycomb structures can be produced, since the means for embossing an extraordinarily high. Has flexibility.

The device for producing a thermoplastic, half-honeycomb strip from a

Strip material, which device is also called "embossing means", wherein the strip material essentially consists of a fiber material which is pre-impregnated with a thermosetting binder, comprises in an advantageous embodiment a first embossing wheel and a second embossing wheel each a circumferentially extending contact surface having circumferentially spaced apart embossing teeth and recesses therebetween, wherein the first and second embossing wheels are mutually adapted and mutually interlocked such that between the first and second Embossing a linear or sheet-like pressure point is formed, which moves during the rotation of the embossing wheels along the contact surface to produce a moving along the strip material, rolling pressure point, and includes a controllable pressure generating device which is connected to the first and second embossing wheel is to generate a controllable pressure between the embossing wheels, and each comprises a drive device for driving the first and the second embossing wheel, and comprises a heating device for at least one of the embossing wheels, and comprises a control device, at least with the drive devices and the pressure generating device signal transferring connected to rotate the embossing wheels in the same direction in a conveying direction and to generate a controllable pressure via the pressure generating device and the drive devices at the pressure point.

The honeycomb structure according to the invention has the advantage that it consists of a multiplicity of structured strips which are mutually connected to one another via a thermosetting connection. Therefore, the honeycomb structure has an advantageous mechanical stability, especially at higher temperatures. In addition, the honeycomb structure also has an advantageous thermal stability, since the thermoset, in contrast to a thermoplastic, does not become plastic at higher temperatures and does not melt. Thermosets in the final cured state advantageously consist of closely chemically crosslinked macromolecules. They are insoluble, no longer fusible and solid until decomposition. The honeycomb structure according to the invention has the advantage that it is preferably water-insoluble. The honeycomb structure according to the invention is therefore insensitive to moisture and can therefore be used in a large number of fields of application.

The inventive method has the advantage that the honeycomb structure in comparison to State of the art has significantly higher stability and rigidity and also can be produced efficiently. In addition, the honeycomb structure in a variety of possible shapes and widths can be produced. The honeycombs can be made in a variety of possible geometric shapes. In a further advantageous method, linear or rectilinear honeycomb strips are produced in a first partial method step, and in a second partial method step, the linearly extending honeycomb strips are connected to one another, for example by gluing, in such a way that a sheet-like honeycomb structure is formed. This method makes it possible to produce the individual honeycomb strips in a variety of possible geometric shapes, which is why the honeycomb structures can be produced in a variety of possible structures. The honeycomb strips or the structured strips can be produced in a wide variety of widths, wherein this width determines the height of the honeycomb structure, which is why honeycomb structures of different, constant height can be produced in a very simple manner. In addition, it is possible to produce honeycomb strips or structured strips of variable width, which makes it possible to produce a honeycomb structure with variable height.

The method according to the invention makes it possible, starting from a strip material or starting from a strip-shaped material, to produce honeycomb structures or honeycomb strips. Cellulose is advantageously used as the strip material, the strip material being provided with a binder which crosslinks to a thermoset, is pre-impregnated or coated, or the strip material is impregnated beforehand with a binder crosslinking to a thermosetting plastic before structured strips are produced from the strip material. The strip material can also consist of another material, for example a plastic. It may prove advantageous to provide the strip material and / or the structured strip and / or the honeycomb structure with a silicate, for example, by immersing them in a silicate or spraying them with silicate, which results in the production of fire-resistant or flame-retardant honeycomb strips or strip material and Therefore, the production of honeycomb structures with such properties allows.

In a further advantageous embodiment, the honeycomb strips or the structured strips can also be produced running in three dimensions, wherein a honeycomb structure comprising a multiplicity of such honeycomb strips or structured strips likewise has a three-dimensional profile. The method according to the invention thus makes it possible to produce honeycomb structures as required in a multiplicity of possible three-dimensional structures. The method and device for producing thermoset, semi-honeycomb strips or thermoset honeycomb structures makes it possible to produce the honeycomb structures very inexpensively, and also makes it possible to produce the honeycomb structures in a variety of shapes, widths and thicknesses, as well as with a large number of possible honeycomb geometries. The honeycomb structures according to the invention can serve as core material. The honeycomb structures according to the invention can also be provided with a cover plate on both sides in order to produce in particular lightweight walls with a sandwich construction, the lightweight walls consisting of a honeycomb core and cover plates arranged on one or both sides of the honeycomb structure. ¹

Thermosets in the final cured state consist of closely chemically crosslinked macromolecules. They are insoluble, no longer meltable and solid until decomposition. From low molecular weight starting materials, called monomers, are first uncrosslinked or only slightly crosslinked, still plastically moldable and also still relatively low molecular weight intermediates / precursors produced, which - referred to as resins or herein as binders - serve for the actual crosslinking to the thermoset. They contain for this purpose two or more functional groups capable of cross-linking. Spatial crosslinking takes place in the present process in the presence of heat or radiation (UV, IR radiation). Occurs in the crosslinking a splitting off of volatile substances, it is called condensation resins such. B. in the phenolic resins. Resin compositions in which condensation or water vapor is released at the usual processing temperatures are also referred to as high-pressure resins. If the strip material is pre-impregnated with such a high-pressure resin, the pressure exerted by the embossing wheels on the strip material is particularly important for blistering or even tearing of the strip material due to the water vapor arising in strip material during the course of the condensation reaction to avoid developing water vapor pressure. In the present method, in one possible embodiment

Phenol resin used as a binder, wherein binders are generally suitable, which crosslink to form a thermoset.

The invention will be explained below with reference to exemplary embodiments in detail.

Brief description of the drawings

Fig. 1 is a schematic perspective view of a manufacturing device with means for heating a honeycomb structure;

1a is a schematic, perspective view of a further production device with means for heating a honeycomb structure according to FIG. 1;

Fig. 2 is a perspective view of a

Heating apparatus; Fig. 3 is a perspective view of a forming device;

4 is a perspective view of a connection device;

5 shows an embodiment of a connecting device;

5a, 5b show several embodiments of a first stamping wheel;

6a, 6c embodiments of a structured strip;

Fig. 6b is an example of a structured

strip;

Fig. 7, 7a two embodiments of a honeycomb strip;

8a, 8b, 8c, 8d, 8f differently configured structured strips;

9a, 9b, 9c, 9d, differently configured honeycomb strips;

Fig. 10 is a schematic side view of a manufacturing device;

10a shows schematically a side view of another manufacturing device;

FIG. 10b is a detailed view of the contact pressure device shown in FIG. 10a;

10c shows a further embodiment of a forming and feeding device;

An embodiment of a guide device with stop;

FIG. 10e is a detailed view of the pressing device shown in FIG. 10D;

FIGS. 10f, 10g, 10h, 10e show various process states during the joining of a structured strip to a honeycomb structure;

10k schematically a plan view of a further embodiment of a

Stop device; 101, 10m, 10η, 10o different process states during the joining of a structured strip with a honeycomb structure in a plan view of the stop device according to FIG. 10k;

10p schematically shows a plan view of a

A stop device comprising a device for assisting the entry by means of a gaseous fluid;

11 schematically a device for merging partial strips;

Fig. 12 shows schematically a guide device for forming a honeycomb strip;

Fig. 13 is a side view of a three-dimensionally shaped honeycomb structure;

14 shows a further embodiment of a two-dimensionally shaped honeycomb structure;

Fig. 15 is a detail view of the connection of a honeycomb structure with a cover plate;

FIG. 16 shows a side view through a honeycomb structure provided with covering layers; FIG.

17 is a schematic side view of another manufacturing device;

18 is a plan view of a cutting and holding device, in particular for the production of narrower strips;

FIG. 19 shows a further ^exemplary embodiment of a production device; FIG.

21 shows a further embodiment of a production device;

FIG. 22 shows a further embodiment of a production device; FIG.

FIG. 23 schematically shows a plan view of a further embodiment of a production device; FIG.

FIG. 24 shows a side view of a manufactured honeycomb structure; FIG.

Fig. 24a is a plan view of a manufactured honeycomb structure; Fig. 25 is a side view of a strip;

Fig. 25a is a plan view of another manufactured honeycomb structure;

Fig. 25b is a front view of the honeycomb structure shown in Fig. 25a;

FIG. 26 is a side view of a first stamping wheel with a ferromagnetic ring gear; FIG.

Fig. 26a is a perspective view of the embossing wheel shown in Fig. 26;

FIG. 26b shows a detailed view of the meshing of the embossing teeth of the first and second embossing wheels; FIG.

Fig. 26c is a section along the line C-C of the embossing wheel shown in Fig. 26;

Fig. 26d is a side view of another embodiment of an embossing tooth;

26e is a partial view of a section through the two embossing wheels with strips arranged therebetween;

FIG. 26f shows a plan view of the half-honeycomb strip with pressure point; FIG.

FIG. 26g is a partial view of a section through a stamping wheel; FIG.

FIG. 26h is a partial view of a plan view of the surface of a stamping wheel; FIG.

FIG. 26i is a partial view of a section through a stamping wheel; FIG.

FIG. 26k shows a half-honeycomb strip with a partially structured surface; FIG.

FIG. 261 shows a section through a half-honeycomb strip with a structured surface; FIG.

Fig. 26m schematically shows the forces and moments occurring at the embossing wheels;

Fig. 26n is a side view of another embodiment of an embossing tooth;

Fig. 27 is a schematic side view of two interdigitated embossing wheels; Fig. 28 shows a strip of predetermined shape with protruding tabs;

28a shows a plan view of the strip arranged in a honeycomb structure according to FIG. 28;

Fig. 29 is a schematic plan view of another manufacturing apparatus;

Fig. 29a is a side view of a sandwich panel during its manufacture;

Fig. 29b is a schematic plan view of another manufacturing device;

Fig. 29c is a side view of another sandwich panel during its manufacture;

Fig. 29d is a plan view of another sandwich panel;

FIG. 29e shows a section along the line D-D of the sandwich plate according to FIG. 29d; FIG.

Fig. 30 shows schematically a machine for producing a thermosetting honeycomb structure. Basically, the same in the drawings

Parts provided with the same reference numerals.

1 shows schematically and three-dimensionally an apparatus 1 for the continuous production of a honeycomb structure 10, wherein the apparatus 1 comprises means for heating the honeycomb structure 10, which are designed as an upper and a lower radiant heater 100, 101. The radiant heaters 100, 101 are used for curing not yet cured joints 2s (Fig. 7 ff and 29 ff) of the honeycomb 10. The upper and lower radiant heaters 100, 101 are arranged close enough above and below a conveyor belt 9 as a transport, which with respect to a conveying speed is set such that the transported in a conveying direction 9a honeycomb structure 10 sufficiently long in the vicinity of the radiant heater 100, 101 remain to harden the not yet cured joints 2s (Fig. 7 ff and 29 ff) and also to allow a continuous flow of production.

In other embodiments, not shown, one or more infrared radiators are also used for curing the connection points 2s (FIGS. 7 ff and 29 ff). In principle, however, other heat sources or combinations of heat sources can be used, which give a preferably constant heat of more than 100 ° C, in particular from 120 ° C to 280 ° C, and in particular from 130 ° to 170 ° Celsius. The actually set temperature is dependent, in particular, on a thickness and an area of a honeycomb structure 10 and on their conveying or production speed.

As mentioned, the honeycomb structure 10 rests on a conveyor belt 9 moving in the conveying direction 9a, the honeycomb strips 13 being fed continuously in the conveying direction 9a and being fastened, eg glued, to the end or stop edge with the honeycomb structure 10 so that the attached honeycomb strip 13 becomes part of the honeycomb structure 10, and then another honeycomb strip 13 can be attached to the honeycomb structure 10, for example, glued. The illustrated device 1 comprises two non-visible holding devices 20 with supply rolls on which a strip material 2, in particular with a pre-impregnated to a thermosetting binder paper strips or cellulose strips, are stored. The strip material 2 preferably has a constant width B, wherein the width B is preferably in the range between 2 cm and 25 cm. The width B determines the overall height of the honeycomb structure 10 so that, depending on the desired height of the honeycomb structure 10, a correspondingly wide strip material 2 is used to produce the honeycomb strip 13. The strip material 2 is preimpregnated with a binder which crosslinks to a duroplastic, for example by impregnation or coating. The strip material 2 consists essentially preferably of cellulose, in particular paper or waste paper.

The polymer material used is a duroplastic. The thermosets include, in particular, the aminoplasts and the phenoplasts, which are connected to one another via methylene bridges (-CH 2 -) or methylene ether bridges, but also synthetic resins, such as melamine resin, phenolic resin or a melamine resin-phenolic resin derivative, epoxy resins, crosslinked polyacrylates and other crosslinked compounds Polymers.

The exemplary embodiment of a device 1 illustrated in FIG. 1 uses strip material 2, 2a, 2b consisting of a synthetic resin-coated or thermoset-coated paper strip or cellulose strip for producing the honeycomb structure 10. The strip material 2 is stored on supply rolls (not shown). Following the supply rolls, a heating device 3 is arranged which heats the strip material 2, 2a, 2b withdrawn from the supply rolls before the thus heated strip material 2c, 2d enters the forming device 4, 5, which consists of the previously unstructured strips 2c, 2d by forming structured stripes 2e, 2f generated. The structured strips 2e, 2f resulting after this processing step are fed to a connecting device 6, in which the two strips 2e, 2f are brought together and pressed against one another with respect to their running direction in such a way that opposite surfaces 2h, 2i, also referred to as contact sections , touching each other. A chemical reaction of the binder has the consequence that the two contact sections 2h, 2i of the two strips 2e, 2f form a thermosetting compound which, after cooling, no longer has a plastic effect due to thermal influences. formable connection. The two strips 2e, 2f thus connected together form a honeycomb structure 2g, which is cut by means of a cutting device 7 so that the honeycomb structure 2g becomes a honeycomb strip 13 after being cut. In the illustrated embodiment, the honeycomb strip 13 rests on a support 8, which is mounted pivotably about a center of rotation 8b in the direction of rotation 8a. It may prove advantageous to cool the honeycomb structure 2g or the honeycomb strip 13 located on the support 8 with the aid of a cooling device 11, for example with supplied air IIa, in order thereby to cool the heated honeycomb strip 13.

The method for the continuous production of a honeycomb structure 10 can thus take place in that two strip materials 2a, 2b provided with a thermoset-crosslinking binder or a polymer material are formed into structured half-honeycomb strips 2e, 2f such that the two structured half-honeycomb strips 2e, 2f merged and connected to a honeycomb structure 2g, wherein between the two structured half-honeycomb strips 2e, 2f a thermosetting compound is formed, that the honeycomb structure 2g is cut in a predetermined length to a honeycomb strip 13, that the honeycomb strip 13 for abutment against a Stop edge 10a of the honeycomb structure 10 has certain stop side 13b that the stop side of the honeycomb strip 13 and / or the stop edge 10a of the honeycomb structure 10 is provided with an adhesive, and that the abutment side 13b of the honeycomb strip 13 of the stop edge 10a of Honeycomb structure 10 is supplied and glued thereto, so that the honeycomb strip 13 forms part of the honeycomb structure 10, wherein the last supplied and glued honey strips 13 forms a stop edge 10a, to which the next following honeycomb strip 13 is adhered. FIG. 2 shows the heating device 3 shown in FIG. 1 in detail. This comprises six heatable, rotatable rollers 3a, 3b, 3c, 3d, 3e, 3f, wherein in each case two oppositely arranged rollers each generate a mutual contact pressure, in order to exert a contact force on the strip material 2. The supplied strip material 2 is heated on the one hand in the heating device 3 and on the other hand pressed under pressure, so that the synthetic resin or the binding agent is heated and the strip material 2 is preferably completely impregnated by the synthetic resin or by the binder. In an advantageous embodiment, the surfaces of the rollers 3a to 3f are coated with a dirt-repellent layer or provided with an antiadherent surface. The roller 3a to 3f could, for example, be made of chromium steel and have a surface coating of nanoparticles, which prevent adhesion of impurities such as the synthetic resin. Advantageously, a cleaning device 19 is also provided, which is shown only schematically in Figure 2, and which serves in particular to clean the surfaces of the rollers 3a to 3f, which come into contact with the strip material 2, 2a, 2b, to clean of impurities.

FIG. 3 very schematically shows an exemplary embodiment of a forming device 4. The preheated and thus particularly flexible and easily deformable strip material 2c is fed to the forming device 4 and then has the structure predetermined by the shape of the forming device 4. In the illustrated embodiment, two opposing embossing wheels 4a, 4b are used for this purpose, a first embossing wheel 4a, which engages in a second embossing wheel 4b. The embossing wheels 4 a, 4 b are at first glance like toothed wheels configured with circumferentially spaced embossing teeth 4 c, wherein in the circumferential direction between the embossing teeth 4 c recesses 4 d or ground surface Chen 4d are arranged with subsequent side surfaces 4g. In the illustrated embodiment, the second embossing wheel 4b is configured opposite to the first embossing wheel 4a, so that in each case an embossing tooth 4c of the first embossing 4a engages a recess 4d of the second embossing wheel 4b and vice versa, so that, as shown in FIG Strip material 2c is formed in the shape determined by the geometry of the embossing teeth 4c, so that a structured strip 2e is formed, with a lower surface 2i, an upper surface 2h and side surfaces 2k. Since the structure of the structured strip 2e is determined by the geometry of the embossing wheels 4a, 4b, it is possible in a very simple manner to produce structured strips 2e of very different structure by using embossing wheels 4a, 4b with a differently shaped peripheral surface. For example, the circumferential surface of the first embossing wheel 4a may be changed by having the embossing tooth 4c have a wider or narrower surface in the circumferential direction, or the base 4d may have a circumferentially wider or narrower surface, or the embossing tooth 4c may have a different shape and is designed, for example, round, or that the side surface 4g are designed differently in terms of shape or with respect to depth. In addition, the overall diameter of the embossing wheel 4a can be selected as required, with the result that struktu- rierte strips 2e can be produced in a wide variety of forms by the different arrangement options and design options of the embossing teeth 4c, as exemplified in Figures 8a to 8f is shown. The detailed design of the embossing teeth 4c is shown only schematically in FIG. The embossing teeth 4c have rounded teeth, as shown for example in the figure 5a in detail. The forming device 5 shown in FIG. 1 is preferably configured identically to the forming device 4 shown in FIGS. 1 and 3.

FIGS. 9a to 9d show exemplary embodiments of differently configured honeycomb strips 13, which consist of two merged and interconnected structured half-honeycomb strips 2e, wherein all half-honeycomb strips 2e have rounded transition regions 2m. FIG. 9a shows a large honeycomb structure. FIG. 9b shows a honeycomb structure which has the same shape as the honeycomb structure shown in FIG. 9a, wherein the honeycomb structure according to FIG. 9b is substantially smaller in dimension. FIG. 9c shows a further honeycomb structure 13 which, however, has a substantially greater length in the direction of travel than the embodiment according to FIG. 9b, which can be achieved by designing the embossing tooth 4c to be much longer in circumferential direction than that for producing the structure according to FIG. 9b used embossing tooth 4c. FIG. 9d shows a further exemplary embodiment of a structured strip 2e which has a semicircular course. This structure can also be produced by a correspondingly shaped surface profile of the first and second embossing wheels 4a, 4b. By means of a corresponding configuration of the circumferential surface of the first and second embossing wheels 4a, 4b, structured strips 2e can thus be produced in a multiplicity of possible structures and geometric dimensions. It is also possible, for example, to form structured strips which, after being joined together to form a honeycomb structure, form quadrangular honeycombs.

FIG. 4 shows a connection device 6 in detail. The two structured half-honeycomb strips 2e, 2f are fed to the connecting device 6. The task of the connecting device 6 is the two structured strips 2e, 2f mutually in Positioning their direction and mutually connect or weld together. The mutual positioning in the direction of extent is preferably as shown, such that a lower portion 2i of the first structured strip 2e is brought into mutual contact with an upper portion 2h of the second structured strip 2f to thereby connect the two strips 2e, 2f and to produce such a honeycomb structure 2g or a honeycomb strip 13. The connecting device 6 has a first and a second guide wheel 6a, 6b. The guide wheels 6a, 6b are designed as toothed wheels with teeth 6f, wherein these teeth 6f form a heatable pressing surface 6c on their front side, a recess 6d with side walls 6e being arranged between circumferentially adjacent teeth 6f. The geometry of the pressing surfaces 6c, the depressions 6d and the side walls 6e is adapted according to the geometry of the structured strips 2e, 2f, so that the portion 2i of the first structured strip 2e and the portion 2h of the second structured strip 2f are preferably arranged opposite one another and thereby pressed against each other and thereby connected, so that the honeycomb structure 2g is formed. On the one hand, the connecting device 6 shown in FIG. 4 has the advantage that the structured half-honeycomb strips 2e, 2f can be positioned very accurately with the aid of the teeth 6f engaging in the strips 2e, 2f in the course direction of the strips 2e, 2f, and On the other hand, has the advantage that the mutually contacting portions 2i, 2h of the two strips 2e, 2f are heated by the heater caused by the teeth 6f and are pressed against each other by the force exerted by the teeth 6f pressing force, so that a particularly advantageous connection formed by the two strips 2e, 2f at the common points of contact after the polycon- densation mutually firmly duroplastic connected. In the following, this connection is also referred to as a mutual "welding." In an advantageous embodiment, a cleaning device 19, shown only schematically, is provided to clean the surfaces of the first and second guide wheels 6a, 6b from contamination.

FIG. 5 shows the first guide wheel 6a with a plurality of circumferentially spaced teeth 6c, the teeth 6c preferably being rounded, which is not shown in detail. FIG. 6a shows by way of example a section of the first structured half-honeycomb strip 2e which has been produced with the forming device 4 shown in FIG. 26b, in detail. The first structured strip 2e has upper portions 2h, lower portions 2i and side portions 2k. In addition, the strip 2e has rounded transition regions 2m. FIG. 7 shows a section of a honeycomb structure 2g or a section of a honeycomb strip 13 in detail. The first structured half-honeycomb strip 2e and the second structured half-honeycomb strip 2f are mutually fixedly connected to one another via the thermoset contact points 2s, also referred to below as "welding points" or connecting points.

FIGS. 5a and 5b show exemplary embodiments of first embossing wheels 4a which have embossing teeth 4c with a circumferentially rounded geometry, so that in particular at the transition points of embossing tooth 4c to side surface 4g and from side surface 4g to recess 4d a round or arcuate running Transition results without kink. The arcuate transition has a radius of curvature, which may for example have a value in the range between 3 mm to 5 mm or 3 to 10 mm or 3 to 200 mm, depending on the overall diameter of the first stamping wheel 4a. The maximum value of the radius of curvature is open at the top and depends on the total diameter of the first stamping wheel 4a, by a larger overall diameter also allows a larger radius of curvature. In the exemplary embodiment according to FIG. 5b, certain embossing teeth 4c are missing in the circumferential direction. The strip 2e shown in FIG. 8f could, for example, be formed with a forming device 4 comprising the first embossing wheel 4a and a second embossing wheel 4b, not illustrated, wherein the surface of the second embossing wheel 4b is circumferentially opposed to the surface of the first embossing wheel 4a is configured to form the structured strip 2e shown in Figure 8f.

A forming device 4 comprising two intermeshing embossing wheels 4a, such as one of which is shown in FIG. 5a, has the advantage that structured semi-honeycomb-shaped strips 2e can be formed on the basis of the rounded embossing teeth 4c, as illustrated in FIGS. 6a or 6c are. These structured semi-honeycomb-shaped strips 2e have no kink 2n in the transition region 2m, but have a curvature or arcuate course in the transition region 2m, for example a curve having a radius of curvature 2r, where the radius of curvature 2r is, for example, a value between 3 mm to 5 mm or 3 to 10 mm or 3 to 200 mm.

FIG. 6a shows a perspective view of a structured strip 2e which has arcuate transition regions 2m, that is to say transition regions 2m without kinks 2n. FIG. 6c shows a side view of a further exemplary embodiment of a structured strip 2e having a wave-shaped transition region 2k or an arcuate or curved transition region 2m. The structured half-honeycomb strip 2e also has upper sections 2h, lower sections 2i and side surfaces 2k. The illustrated strip 2e also has inflection points 2q, at which the one arcuate transition region 2m merges into the next arcuate transition region 2m. A rectilinearly extending section could also be arranged between the two arcuate transitional regions 2m, so that no unique inflection point 2q is formed between successively following transitional regions 2m. The strips 2e shown in FIGS. 6a and 6c thus have a curved or wavy course, that is to say a course without kinks.

For a better understanding of the disadvantage of a kink, FIG. 6b shows in a side view a partial section of a structured strip 2e with kinks 2n. Such structured strips 2e with kinks 2n are advantageously not produced by the method according to the invention. Duroplastics have the disadvantage that they can be relatively hard and brittle, and therefore prone to impact, impact and bending. A disadvantage of the structured strip 2e shown in FIG. 6b is the fact that a

Movement or load of the strip 2e in the direction 2o has the consequence that the kinks are heavily loaded 2n, since the successive sections of the strip 2e move each other in the direction of movement 2p, which, for example, a weakening or breakage of the kinks to 2n Episode has. In contrast to this, the structured strip 2e according to the invention shown in FIGS. 6a and 6c with arc-shaped transitional regions 2m has the advantage that no clear stress point is formed in the direction 2o when the strip 2e is moved or loaded in the direction 2e, because the strip 2e abuts various places, much like a spring is deformable. In the case of a structured strip 2e with wave-shaped or arcuate transitional regions 2m, as shown, for example, in FIGS. 6a and 6c, there are none in the transition region 2m Kinks 2n and thus no weakenings or breaks. A structured strip 2e with arcuate transition regions 2m therefore has a significantly improved long-term behavior with respect to fractures. A sandwich panel having a honeycomb core with structured strips 2e, which are curved or curved as shown in FIGS. 6a, 6c, therefore also has an improved tensile load and an improved vibration load.

FIG. 7a shows a section of a honeycomb structure 2g or a section of a honeycomb strip 13 in detail, this being formed from structured strips 2e, 2f with arcuate transition areas 2m. The first structured strip 2e and the second structured strip 2f are mutually fixed or welded together via the thermoset contact points 2s.

FIG. 10 shows a detail of the production device 1 in a side view. The produced honeycomb structure 10 rests on a support surface 9, wherein the support surface 9 is moved in the conveying direction 9a. The honeycomb structure 2g is first pushed onto the support 8 during the production process, and in a preferred embodiment is cooled by means of a cooling device 11 by inflowing cooling air IIa. As soon as the honeycomb structure 2g has reached the intended length, it is cut off with the cutting device 7 so that a honeycomb strip 13 or a structured strip 2e is formed. The honeycomb strip 13 has an abutment side 13b, which is provided with an adhesive by means of an adhesive supply device 12, for example, wherein, if glued, in particular the surfaces coming into contact with the honeycomb structure 10 are supplied with adhesive. The support 8 is rotatably mounted in the direction of rotation 8a, so that the honeycomb strip 13a as shown rotated by 90 ° and then placed on the support surface 9. A shock 17, the honeycomb strip 13a then slides in the direction of displacement 9a towards the stop edge 10a of the honeycomb structure 10 until the honeycomb strip 13a abuts with its stop side 13b against the stop edge 10a of the honeycomb structure 10, so that it adheres to the stop edge 10a of the honeycomb structure 10 and the honeycomb strip 13 becomes a part of the honeycomb structure 10. This thus glued honeycomb strip 10b now forms a stop edge 10a for a next honeycomb strip 13a, so that by this continuous process, the honeycomb structure 10 in the direction of displacement 9a is getting longer and thus the honeycomb structure 10 is formed. The means for heating the honeycomb structure 10 for the purpose of curing of joints are not explicitly shown in Figure 10, but may for example be arranged at the end of the conveyor belt 9 in the conveying direction 9a.

1a shows diagrammatically and three-dimensionally a further embodiment of a device 1 for the continuous production of a honeycomb structure 10. The device 1 also has an upper and a lower radiant heater (100, 101) for heating the honeycomb structure 10 according to FIG. 1, which is used for curing serve not yet cured joints 2s of the honeycomb structures 10 and therefore need not be explained in detail. In other variants, not shown, in turn, one or more infrared radiators are used to cure the joints 2s.

In contrast to the exemplary embodiment illustrated in FIG. 1, the production device 1 shown in FIG. 1 uses only one structured half-honeycomb strip 2e which is fed in the conveying direction F, wherein the structured strip 2e comprises a first and a second half by means of the forming device 4 As soon as the completely required length of the strip 2e has been registered on the support 8, it is cut with the cutting device 7 and the structured one Strip 2e then struck against the stop edge 10a of the honeycomb structure 10. The forming device 4 is preceded by a supply roll with strip material 2, wherein the strip material 2 passes through a heating device 3, and is then fed as an unstructured strip 2c of the forming device 4, after which the structured strip 2e is formed.

The striking of the structured strip 2e to the stop edge 10a takes place in a possible embodiment as already described in FIG. 10 in that the structured strip 2e is fed to the support 8, after which the structured strip 2e is cut by the cutting device 7 and provided with an adhesive After that, the structured strip 2e is pivoted onto the support surface 9, and then the structured strip 2e, for example with the aid of a plunger 17 of the stop edge 10a is supplied, so that the structured strip 2e is glued to the honeycomb structure 10, so that the just glued structured strip 2e now forms a stop edge 10a for another supplied structured strip 2e.

A single structured halbwabenförmi- ger strip 2e, or a plurality of

at least two mutually already structured half-honeycomb strips 2e,

Also referred to herein as honeycomb strip 13, can in various ways the

Stop edge 10a of the honeycomb structure 10 are supplied. FIG. 10a schematically shows a structured strip 2e or a honeycomb strip 13 which rests on a bearing surface 9 and can be fed by a ram 17 of the stop edge 10a which is movable in the direction 17a. Below the support surface 9, a pressing device 21 is arranged, which stamp 21a, 21b, which are mounted displaceably in the vertical direction 21c and in the horizontal direction 21d. FIG. 10b shows a top view of the striking of a structure 2e to the stop edge 10a by means of the pressing device 21. For the time being, the structured strip 2e is fed to the stop edge 10a of the honeycomb structure 10. Thereafter, the punches 21a, 21b are lifted in the vertical direction 21c, and then pressed against each other in the horizontal direction 21d, so that the structured strip 2e is pressed against the stop edge 10a. Thereafter, the punches 21a, 21b are slightly moved back in the horizontal direction 21d, and thereafter moved in the vertical direction 21c until they are disposed below the support surface 9. The structured strip 2e is then connected to the honeycomb structure 10, forms part of the honeycomb structure 10, and also forms the stop edge 10a for a next structured strip 2e to be attached. Instead of a structured strip 2e, a honeycomb strip 13 could also be struck against the stop edge 10a of the honeycomb structure 10 in the same way. The arrangement shown in FIG. 10b has the advantage that the pressing device 21 can exert such a force on the stop edge 10a and the structured strip 2e via the punches 21a, 21b that the structured strip 2e bonds well with the stop edge 10a. In a particularly advantageous embodiment, no adhesive is required for this connection, because the structured strip 2e has contact sections 2i, 2h, along which the condensation reaction of the binder was not or only partially effected, so that between the stop edge 10a and the structured strips 2e contacting them forms a thermosetting compound. To initiate the condensation reaction, the punches 21a, 21b are heatable, for example, inductively heated, and pressed against each other under pressure, for example at a temperature between 120 ° C and 280 ° C and at a pressure between 10 bar and 300 bar, around the stop edge 10a and the structured strip 2e at the attacking site to heat the binder to a To crosslink roplast, and to press condensation products from the strip 2e, so as to weld via a thermosetting compound the strip 2e with the stop edge 10a. The end face of the punches 21a, 21b, which faces the strip 2e and / or the stop edge 10a, have in a particularly advantageous embodiment a structured surface, for example the structure shown in FIGS. 26g, 26h or 26i. This causes, as shown in Figure 7, a structured or embossed weld 2sl, which has the advantage that the joint 2s of the 5 two strips 2e, 2f holds together particularly well, and that the joint 2s due to the structure or the embossing has better mechanical properties such as increased stiffness.

The production device 1 for honeycomb structures 10 shown in FIG. 1 a comprises, in particular, a feed device 32, a stop device 34, a drive and control device 30 and a bearing surface 9. The feed device 32 comprises, in particular, a shaping device 4, a heating device 3 and a cutting device 7 Stop device 34 comprises all necessary means for striking the structured strip 2e against the honeycomb structure 10 in order for the structured strip 2e to become part of the honeycomb structure 10. The resources required for the stop device 34 are shown in the following figures.

The control device 30 is of particular importance for the operation of the production device 1. In one possible embodiment, the control device 30 regulates the heat generated by the heating device 3 and the rotational speed of the forming device 4. The speed of the forming device 4 is of particular importance, since this one hand, the entry speed of the structured strip 2e in the conveying direction F in the stop device 34th certainly. Also determined the speed of the shaping device 4 the withdrawal speed of the strip material 2 from the supply roll and the speed of the unstructured strip 2c. This speed also determines the residence time of the unstructured strip 2c in the heating device 3. In a further advantageous embodiment, the forming device 4 also has a heating device, which can be controlled via the control device 30. In a further advantageous embodiment, moreover, the contact force between the two embossing wheels 4a, 4b can be controlled via the control device 30.

In the illustrated embodiment, the control device 30 is connected via an electric line 31 a ei ^¬ nem not shown speed sensor 2c, the velocity of the strip unstructured! to eat. An electric lead 31b is connected to the heater 3 to supply it with a target value for the heat energy to be delivered and / or to measure the temperature in the heater and / or the unstructured strip 2c. An electrical line 3c is connected to the forming device 4 in order to control the rotational speed of the embossing wheels 4a, 4b, and possibly to control the mutual contact pressure of the embossing wheels 4a, b and possibly to control a heat emitted by the embossing wheels 4a, 4b. An electrical 5 line 31d controls a motor, not shown, which controls the rotational movement 8a of the support 8. An electric line 31e controls a motor, not shown, which controls the displacement speed of the support surface 9 in the direction of movement 9a. An electric lead 31f drives a cutter 7 to sever the patterned strip 2e. An electrical lead 31g detects a signal from a sensor 24, which detects the position of the structured strip 2e, and which in particular detects the complete entry of the strip 2e. An electrical line 31h controls a possibly on hand cutting or punching device 23, which changes the strip material 2 by cutting or punching in shape. The production apparatus 1 may also comprise a plurality of further sensors and / or actuators, which are not shown in detail, and which in particular can be monitored and / or controlled by the control apparatus 30.

FIG. 10c discloses subcomponents of a particularly advantageous production device 1. The supply device 32 comprising the heating device 3, the forming device 4 and the cutting device 7 is configured and arranged in such a way that the structured strip 2e is fed to the bearing surface 9 in such a way that it does not more as shown in Figs 1 and la must be rotated, but already has the required position for abutment against a stop edge 10a. The structured strip 2e is entered over the width of the support surface 9, wherein the strip 2e has an upright position, or wherein the strip 2e runs perpendicular to the support surface 9. In an advantageous embodiment, a guide device 26 is provided, which limits the freedom of movement of the structured strip 2e at least on one side, so that it is securely and preferably registered approximately rectilinearly over the support surface 9. In an advantageous embodiment, the guide device 26 also comprises a funnel-shaped widening entrance area 26a, 26b, for example, wherein only the footprint of the entrance areas 26b is shown.

FIG. 10D shows a further exemplary embodiment of a guide device 26, which is designed as a stop 27. On the side facing the structured strip 2e, the stop 27 preferably has such a structure that it corresponds to the course of the structured strip 2e, that is to say that the stop side facing the structured strip 2e 27h has subscripts 27a, elevations 27b and inclined locations 27c which correspond to the geometric shape of the structured strip 2e. In an advantageous embodiment, the stop side 27h, in addition to holes 27d, through which a gaseous fluid can be omitted or sucked. In a further advantageous embodiment, the bearing surface 9 perforations 9b, wherein only one opening 9b is shown, wherein preferably immediately before each low point 27a and immediately before each high point 27b, an opening 9b is arranged. In the aperture 9b, a punch 21 is preferably arranged, which will be described in detail below.

In a further advantageous embodiment, the guide device 26 or the stop 27 is movably mounted at least in the direction of travel 27e of the guide device 26 or at least in the vertical direction 27b or at least in the direction of progression 27g of the support surface 9.

Figure 10e shows a section of a honeycomb 10 with stop edge 10a, wherein a structured strip 2e is connected to this stop edge 10a. For this purpose, a punch 21a is raised from below the support surface 9, so that the stop edge 10a and the structured strip 2e comes to lie between the high point 27b of the stopper 27 and the punch 21a, the punch 21a causing a contact force in the direction of movement 21c, and if necessary causes heating to a mutual connection of each lying between the high point 27b and the punch 21a portions of stop edge 10a and structured

To effect strip 2e. This striking of the structured strip 2e to the stop edge 10a is explained in detail in FIGS. 10f to 10i in four successive method steps. In FIG. 10f, the punch 21a is located below the surface of the support surface 9. In FIG. 10g, the preferably heatable punch 21a is raised through the opening 9b. drive and also the structured strip 2e is entered. In FIG. 10h the punch 21a is moved in the direction 21c and the strip 2e is welded to the stop edge 10a, in FIG. 10i the punch 21a is driven downwards again.

FIGS. 10k to 10p show in a further exemplary embodiment a further possible method for striking a structured strip 2e against the stop edge 10a in detail. In this embodiment, the punch 21 a and the stop 27 are designed edged. A still plastically deformable, that is not completely polymerized strip 2e with initially roundish transitional regions 2m as shown in FIG. 6a or 6c can be deformed or pressed by means of the punches 21a, 21b and the stop 27 in such a way that this strip 2e, as in FIG 10k, has an angular or substantially angular kink 2n, as shown in FIG. 6b. The device according to the invention thus also makes it possible to produce angular honeycomb structures, or honeycomb structures, with kinks 2n. The exemplary embodiment illustrated in FIGS. 10k to 10p is essentially suitable for producing angular honeycomb structures as well as for producing wave-shaped honeycomb structures. For the production of wave-shaped honeycomb structures, however, the punches 21a, 21b and the abutment 27 would have to be configured as shown, for example, in FIG.

FIG. 10k shows a plan view of the elements required for striking. The stop 27 comprises holes 27d for a gaseous fluid. From the holes 27d, a gas can flow, or via the holes 27d gas can be sucked. The stop side 27h has subscripts 27a, elevations 27b and inclined locations 27c, with respect to the subscripts 27a, a first set of punches 21a being arranged, and with respect to the elevations 27b, a second set of punches 21b being arranged. In addition, the honeycomb structure 10 shown with stop edge 10a and a registered structured strip 2e. FIG. 10k shows the arrangement of the punches 21a, 21b which can be seen from above, wherein it is not shown whether the punches 21a, 21b protrude beyond the support surface 9.

Figures 101 to 10 o now show a possible stop method in detail. The punches 21b project beyond the support surface 9 and are arranged directly behind the stop edge 10a of the honeycomb structure 10. Between the stop edge 10a and the stop 27, a gap is formed, in which the structured strip 2e has been registered. In the subsequent process step illustrated in FIG. 10m, the two punches 21b are moved in the direction 21c towards the stop 27, so that the stop edge 10a of the honeycomb structure 10 and the structured strip 2e are offset from one another along the length of the punch 21b or along the length of the elevation 27b be pressed. Thereafter, the punches 21b are driven downwards and a gaseous fluid such as air is blown out of the holes 27d, so that the stop edge 10a of the honeycomb structure 10 is pushed away from the stopper 27. FIG. 10 shows a subsequent method step in which the punches 21a are raised and engage in the honeycomb structure 10. The entire stop 27 is displaced to the left such that the high points 27b of the stop 27 come to rest against the punches 21a. In addition, a structured

Strip 2e registered between the stop 27 and the stop edge 10a. As soon as this entry has been made, the punches 21a are displaced in the direction 21c towards the stop 27, wherein the elevations 27b are arranged opposite the punches 21a in order to press the structured strips 2e along the section of the punches 21 against the stop edge 10a and so on To connect the structured strip 2e with the honeycomb structure 10. Thereafter, the punches 21c are moved downwards and the stopper 27, as shown in Figure 101, in the direction of movement 27e again moved to the right, so that you can continue with the state shown in Figure 101.

FIG. 101 shows the stop device 34 in a possible insertion position during which the structured strip 2e is introduced in the conveying direction F. FIG. 10p shows the stop device 34 in a further possible insertion position, during which the structured strip 2e is introduced in the conveying direction F. In this case, the punches 21a are in the upper position, so that the structured strip 2e is inserted between the punches 21a and the stop 27, and, if necessary, guided by the punches 21a and 27. It may prove advantageous to provide the plunger 21a and / or the stop 27 with fluid-conducting channels 27h, 21f, which are arranged such that a gaseous fluid flowing out of these channels 27h, 21f acts on the structured force acting in the conveying direction F. Strip 2e causes. The channels 27h, 21f extend within the stop 27 or within the punch 21a, which is why the channels 27a, 21f are shown only schematically. The effluent gaseous fluid may also heat or cool the patterned strip 2e as required by appropriately selecting the temperature and / or the rate of discharge of the gaseous fluid.

FIG. 101 discloses a further possibility for mechanically supporting the entry of the structured strip 2e. For this purpose, a feed device 35 is used, which is designed such that it can grasp the front part or the tip of the strip 2e and can pull the strip 2e in the entry direction F through the opened compartment, in the exemplary embodiment shown from right to left. in that the strip 2e is detected on the right side and is pulled to the left by the collection device 35 through the open compartment. The collection device 35 is configured in the illustrated embodiment as a gripper 35a, which can detect the tip of the strip 2e. The gripper 35a is fastened to a rod 35b, which is displaceable in the direction 35c, such that the gripper 35a is displaceable up to the entrance area of the opened compartment, ie in the illustrated embodiment, to the right side of the abutment device 34, so that the gripper 35a can grasp the tip of the strip 2e, and can pull the strip 2e completely through the opened compartment by moving the gripper 35a in the feeding direction 21. After the complete entry of the strip 2e, the gripper 35a releases the tip of the strip 2e, so that the gripper 35a is ready for the entry of a subsequent strip 2e. In place of a gripper 35a, another device capable of holding the tip or front portion of the strip 2e may be used, for example, the device could create a vacuum that holds the strip 2e.

The strip material 2 could also consist of a

Consist of a plurality of stacked, pre-impregnated paper webs. Figure 11 shows schematically an embodiment of a device which two partial strips 2aa, 2ab of impregnated paper webs together to form a strip material 2a, from which is subsequently formed with a forming device 4, not shown, a half-honeycomb strip 2e. The strip material 2a can also be produced from a multiplicity of sub-strips 2aa, 2ab arranged one above the other in order to form in particular a thicker strip material 2a.

FIG. 12 schematically shows a plan view of a possible embodiment of a support 8, which, unlike the embodiment shown in FIGS. 1 and 10, does not run linearly but has a curved guide device 14 with side guides 14a, 14b, so that the still flexible Honeycomb 2g during insertion into the guide device 14 undergoes a curvature. The resulting after cutting with the cutting device 7 honeycomb strip 13 thus has a curved course.

13 shows a side view of a composite panel 21 comprising a honeycomb structure 10 formed from a multiplicity of the honeycomb strip 13 shown in FIG. 12, the honeycomb structure 10 being connected on both sides to a lower cover plate 15 and an upper cover plate 16.

If the honeycomb structure 2g fed into the guide device 14 is still relatively soft and deformable, honeycomb structures 2g and thus also honeycomb strips 13 can be formed with a wide variety of two- or three-dimensional progressions, the course of the honeycomb strip 13 being determined by the correspondingly extending guide device 14 , FIG. 14 shows a further exemplary embodiment of a honeycomb strip 13.

This can extend in a variety of forms in a two- or three-dimensional direction and can then be struck as shown in Figure 10 in each case to a stop edge 10a of the honeycomb structure 10. Of course, the pad 9 must be configured according to the course of the honeycomb structure 10. In an advantageous embodiment, the bottom cover plate 15 of the composite panel 21 to be produced is used as the base 9, as shown in FIG. It is thus possible to produce honeycomb structures 10 and thus also composite panels 21 in a wide variety of two- or three-dimensional form.

FIG. 15 shows a detailed view of a

Section through a composite plate 21 with honeycomb strip 13. The honeycomb strip 13 shown in section is made as shown in Figure 7 of two strips 2e, 2f, which are mutually fixedly connected to each other via the mutual contact surfaces 2h, 2i. The honeycomb strip 13 is connected via a flowable connection means 22, in particular an adhesive, firmly connected to the lower cover plate 15. In a particularly advantageous embodiment, not only the end face of the honeycomb strip 13 facing the cover plate 15 is provided with adhesive 22, but lateral bead-shaped splices 22a, 22b are formed, which in particular have the advantage that the honeycomb strip 13 with respect to the direction of extension 22c acting forces is better held. The laterally arranged splices 22a, 22b thus increase the strength of the composite panel 21, in particular with respect to shear forces acting in the direction 22c.

FIG. 16 shows a side view of a further exemplary embodiment of a composite panel 21 with honeycomb structure 10 and with lower cover panel 15 and upper cover panel 16. This honeycomb structure 10 is formed from a multiplicity of adjacently arranged honeycomb strips 13 with partially different widths, the width of the honeycomb strips 13 being selected such has been that the honeycomb structure 10 has a varying height profile. In an advantageous embodiment, the strip material 2 could, for example, have an increasing width B, so that the section 21a of the composite plate 21 shown in FIG. 16 can be produced in a simple manner with the manufacturing device 1 shown in FIGS. 1 and 5 by the produced honeycomb strips 13 become wider and wider.

FIG. 17 schematically shows a further exemplary embodiment of a production device 1 which, unlike the production device 1 shown in FIG. 10, can produce three honeycomb strips 13 at the same time by providing these three separate supports 8 and three separate upstream connecting devices 6 and three separate forming devices 4, 5 having. The produced honeycomb strips 13 are successively placed on the conveyor belt 9 as honeycomb strips 13a, where they are separated by means of a stirrer movable in the direction 17b. Sels 17 are shifted towards the stop edge 10a of the honeycomb structure 10 and there are adhered to the honeycomb structure 10. The plunger 17 is connected via a rod 17a with a drive device. The production device 1 can be configured in a large number of ways, such as in embodiments with only two or four or more honeycomb strips 13 that can be produced at the same time. A manufacturing device 1 designed in this way permits a particularly fast and efficient production of the honeycomb structure 10.

Instead of the plunger 17 or in addition to the plunger 17 further devices may be helpful, which allow a secure attachment and insertion of the honeycomb strip 13 in the honeycomb structure 10. As a possible embodiment of such a device, a pressing device 21 is shown in FIG. 21, which comprises punches 21a, 21b and 21d, which are designed such that they can engage in the interior 21 of the honeycomb strips 13 via a movement in the direction 21c at least two adjacently arranged honeycomb strips 13 press against each other and thereby connect. Preferably, the pressing device 21 perpendicular to the view shown a plurality of juxtaposed punches 21a, 21b, 21c, preferably so many that in each interior 21 of a honeycomb strip 13, a punch 21a, 21b, 21c can engage. In an advantageous embodiment, it would also be possible to dispense with the plunger 17 by additionally moving the contact pressure device 21 such that the group of the at least two interconnected honeycomb strips becomes the stop edge 10a and is connected to the honeycomb structure 10.

For the manufacturing apparatus 1 shown in FIG. 17, as shown in FIG. 18, it may prove particularly advantageous to use a strip band 2 of three times the width 3B, which is pulled off in the direction A and, with the aid of two second cutting cutters. directions 18 is cut, so that subsequently three strips 2c of the width B are available, which are each a heater 3 and the downstream forming devices 4,5 and the downstream connecting devices 7 are supplied. The arrangement advantageously comprises a holding device 20 for a roll of strip material 2 of total width 3B, and comprises a separating device in the form of a plurality of second cutting devices 18 for synchronous

Cutting strip material 2 to a width B for each of the downstream embossing means 32 from the roll of strip material 2. For example, 10, 20, 30, or 40 second cutters 18 5 could be provided to simultaneously produce a corresponding number of strips 2c. Advantageously, a forming device 4, 5 would then be arranged downstream for each of the strips 2c in order to form all strips 2c parallel to thermoset, half-honeycomb strips 2e, 2f.

FIG. 19 shows a further exemplary embodiment of a production apparatus 1. This production apparatus 1 has two feeders 20, on which a strip material 2 stored on rolls is mounted. The strip material 2a, 2b is withdrawn from the roll and fed to the forming device 4 or the forming device 5 in order to produce structured strips 2e, 2f. The manufacturing device 1 shown in FIG. 19 is suitable, for example, for producing refractory or fire-resistant honeycomb structures 10. For this purpose, the strip material 2, 2a, 2b is provided with a silicate by impregnating the strip material 2, 2a, 2b with a silicate, for example a two-component silicate resin. The strip material 2, 2a, 2b is, for example, a paper, for example cellulose. The strip material 2, 2a, 2b is either soaked with silicate before it is stored on the roll, or the strip material 2 is after removal from the Roll provided with silicate, for example, by the strip materials 2a, 2b are passed through a silicate liquid before they are fed to the forming devices 4,5. The honeycomb structure 10 is otherwise produced as described with FIG. 1 by connecting the two structured strips 2e, 2f in a connecting device 6, after which a honeycomb strip 13 is produced, and this is glued to the honeycomb structure 10. The forming devices 4, 5 and the structured strips 2e, 2f are shown only schematically, which is why the rounded teeth of the embossing wheels 4a, 4b and the wave-shaped course of the structured strip 2e, 2f are not visible.

In the illustrated embodiments, the heating rollers 3a-3f and / or the embossing wheels

4a, 4b, 5a, 5b and / or the guide wheels 6a, 6b are each made approximately the same width as the strip material 2. However, it may prove advantageous to design the said rollers and wheels relatively broad, for example 10 cm or even 25 cm wide , so that a strip material 2 different width of up to 10cm width or up to 25 cm width can be processed without replacing the rollers and wheels. The geometrical configuration of the structure of the strips 2e, 2f can be changed in a simple manner by replacing the embossing wheels 4a, 4b, 5a, 5b of the forming devices 4, 5 with embossing wheels 4a, 4b, 5a, 5b, which are designed in such a way that the strips 2e, 2f can be reshaped accordingly. The invention thus has the advantage that 5 can be changed in a simple manner, the structure of the strips 2e, 2f by the embossing wheels 4a, b, 5a, 5b are replaced.

FIG. 22 shows schematically and three-dimensionally the production of a honeycomb structure 10, the honeycomb structure 10 resting on a conveyor belt 9 moving in the conveying direction 9a. The honeycomb structure 10 has a stop edge 10a, which is not shown Way structured strips 2e fed and struck on it. The feeding of the strips 2e could take place with a stop device 34 as shown in FIGS. 101 to 10o. The produced honeycomb structure 10 has a lOf gap, as well as a first honeycomb structure 10g and a second honeycomb structure 10h. The first partial honeycomb structure 10g is possible, for example, with the aid of a gripper 35 shown in FIG. 101, in that this gripper 35 positions the structured strip 2e intended for the first partial honeycomb structure 10g against the abutment edge 10a of the first partial honeycomb structure 10a, so that it can be struck there. The creation of a gap 10f, for example, has the advantage that a sandwich construction whose honeycomb core 10 is covered with a cover layer has a cavity within the honeycomb core 10, namely the gap 2f.

FIG. 23 schematically shows an exemplary embodiment of the production device 1 according to the invention for producing a honeycomb structure 10. The production device 1 comprises at least one feed device 32 for supplying a structured strip 2e, and comprises a stop device 34 for positioning the structured strip 2e in front of the stop edge 10a and subsequently with the honeycomb core 10 to connect. On the one hand, the stop device 34 forms an entry channel 34a in order to enter the structured strip 2e starting from the feed device 32 and to position it in front of the stop edge 10a. The stopper device 34 further includes stopper means such as the punches 21a, 21b for connecting the structured strip 2e to the stopper edge 10a, so that the strip 2e becomes part of the honeycomb structure 10. Preferably, with a production device 1 according to the invention, a multiplicity of possible, also differently structured, can be achieved

Strips 2e, 2f, wherein the structured strips 2e, 2f have, for example, the structure, Weight, width B, color or material could differ. In addition to structured strips 2e, 2f, a variety of other materials or structures may also be used

28a, 28b, 28c, for example a channel element 28a having a channel 28, as shown in FIGS. 24 and 24a. The structure of the honeycomb structure 10 according to the invention is preferably formed from strip-shaped material containing cellulose or paper. If necessary, however, it is possible to include additional, other materials in the honeycomb structure 10. As a first approximation, it can be assumed that such materials can be connected to the stop edge 10a of the honeycomb structure 10, which can be fixedly connected to the stop edge 10a of the honeycomb structure 10, e.g. also by gluing. However, if the honeycomb structure 10 is additionally connected, for example, to the support surface 9, for example by designing the support surface 9 as a lower cover plate, or by covering the honeycomb structure 10 additionally with an upper cover plate, this lower and / or upper cover plate can perform the function of FIG "Warp threads" at least partially take over, so that registered materials do not necessarily have to be connected via the stop edge 10a of the honeycomb structure 10. It would thus even be possible to form a gap lOf as shown in FIG. 22, this gap lOf, in contrast to FIG 22, would be perpendicular to the direction of displacement 9a.

The manufacturing device 1 shown in FIG. 23 has on both sides a respective feed device 32, which can each supply a structured strip 2e, 2f to the stop device 34. A plurality of feed devices 32 could be provided, wherein the individual feed devices 32 form, for example, differently structured structured strips, for example structured strips of different width B. In addition, feed devices may also be provided. be provided to other materials or other structures 28a, 28b, 28c of the stop device 34 supply.

FIG. 24 shows in a side view and FIG. 24 a a top view of a selection of a multiplicity of possibilities for producing honeycomb structures 10 with the production apparatus 1 according to the invention. The displacement direction during production of the honeycomb structure 10 takes place in the direction 9 a, for which reason the structure the illustrated honeycomb structure 10 with the first registered strip, the strip 2e shown on the right is started. It should be noted that in connection with the description of Figure 24 and 24a, the term "strip" is used, although the honeycomb structure 10 has no more strips, but one

Forest structure. The term "strip" will be explained below only as the honeycomb structure 10 has been constructed, wherein the illustrated honeycomb structure 10 per se has no more "strips", since they are firmly connected to each other or fused or welded together. Starting from the right, the honeycomb structure 10 was produced such that first a strip 2e and subsequently a strip 2f and a strip 2e was struck. Thereafter, a passage member 28a was struck, which has a through channel lOe, and which consists for example of a plastic or a metal. Subsequently, a strip 2f and subsequently a metal strip 28c was inserted. Subsequently, a narrower strip 2fl was registered, whereby this was struck flush with the honeycomb structure 10 at the top so that a depression lOd results at the bottom. In order to strike the narrow strip 2fl in such a way, it is necessary to arrange it in the horizontal direction exactly at the stop 27. This can be done, for example, with the aid of the arrangement shown in FIG. 10d such that the narrow strip 2fl rests on the support surface 9 resting against the contact surface 9. beat 27 at the subscripts 27a, 27b and 27c inclined sites rests. Then, a vacuum is generated via the holes 27d, so that the narrow strip 2fl bears firmly against the stop 27. The stop 27 is then moved upwards in the direction of movement 27f, and then the narrow strip 2fl is struck against the stop edge 10a, as shown in FIG. 10e, for example, and thus connected to the honeycomb structure 10. Of course, instead of the stop 27, the support surface 9 and / or the honeycomb structure 10 could also be vertical

Direction are shifted to position the strip 2fl with respect to the honeycomb structure 10. The displacement of the stop 27 in the displacement direction 27f has the advantage that a strip 2e held by the stop 27 can be positioned and struck quickly and precisely with respect to the honeycomb structure 10.

Returning to FIG. 24, two narrow strips 2e2 and 2f2 were subsequently struck against the narrow strip 2fl, wherein no height adjustment of the stop 27 is required for striking these narrow strips 2e2 and 2f2, since these strips lie on the support surface

9 rest and therefore stop edge 10a of the honeycomb structure

10 are positioned. Subsequently, a strip 2e was struck. Subsequently, for the time being was the narrow

Strips 2fl struck, in the same way as the previously described narrow strip 2fl. Subsequently, the narrow strip 2e2 was placed on the supporting surface 9 and likewise inserted, as shown in FIG. 10e, against the stop edge 10a and thus connected to the honeycomb structure 10. In the exemplary embodiment according to FIG. 24, this process was repeated, then a metal strip 28 was inserted, and then a structured strip 2f was entered, which forms the stop edge 10a. Between the strips 2fl and 2e2 a continuous cavity 10e has been formed, which can be used, for example, as a channel, for example for the passage of lines like electric or water. The narrow strips 2fl, 2f2 and / or 2e2 can be made available by means of a feed device 32 by being located downstream of a supply roll with strip material 2 of this narrow width. Another way to produce the narrow strips 2fl, 2f2, 2e2 is to process the strip material 2 with a cutting device 23 shown in Figure la, so starting from a strip material 2 with a predetermined width B narrower strips could be produced with the required width. With the aid of a cutting or punching device 23, a strip material 2 with a predetermined width B can be changed in a variety of ways to produce desired cut-outs 2u or openings 2v in the strip material 2. FIG. 25 shows an example of an unstructured strip 2, 2a with a cut-out position 2u and an opening 2v. FIG. 25 a shows a top view of a honeycomb structure 10, in which the unstructured strips 2 a shown in FIG. 25 were used, which were subsequently fed to the forming device 32 and then supplied as structured strips 2 e to the stop device 34 and against the stop edge 10 a of the honeycomb structure 10 were struck. If all the unstructured strips 2a were produced with identically arranged cut-out locations 2u and / or perforations 2v, then in FIG. 25a they would run exactly in the direction of progression 9a. In the exemplary embodiment according to FIG. 25a, the position of the cut-out position 2u and of the aperture 2v has been changed successively in such a way that the course of the cut-out position 2u or the aperture 2v is formed in the honeycomb structure 10. FIG. 25b shows an end view of the honeycomb structure 10 shown in FIG. 25a.

FIG. 26b shows a section of the forming device 4, namely the meshing of teeth 4c of the first and second embossing wheels 4a, 4b, thereby to form the unstructured strip 2c into a structured half-honeycomb strip 2e. In a particularly advantageous embodiment, the surface of the teeth 4c in the circumferential direction of the embossing wheels 4a, 4b designed such that during rolling of the embossing wheels 4a, b results in a linear or surface-shaped contact point 4p, which runs continuously along the unstructured strip 2c, as shown in Figure 26f. In a particularly advantageous embodiment, the transition point between unstructured strip 2c and structured strip 2e is located at the contact point 4p. In a preferred embodiment, the contact point 4p is relatively short in the circumferential direction of the embossing wheels 4a, 4b, and preferably has a length 4u of between 1 mm and 10 mm. The shorter the

Length 4u of the contact point 4p is, the higher is the surface pressure caused at the contact point 4p on the strips 2c, 2e. A high surface pressure results in the advantage that the binder which crosslinks to form a thermosetting plastic is pressed into the strip material 2 well and that condensation products released during the polycondensation are extruded out of the strip material 2. The surface pressure, for example, has a pressure in the range between 10 to 300 bar, in particular of about 20 bar.

FIG. 26 shows in a side view a first stamping wheel 4a whose outer part 4q consists of a ferromagnetic material and whose inner part 4r is made of a non-ferromagnetic material or an electrically non-conductive material. FIG. 26 a shows the first embossing wheel 4 a shown in FIG. 26 in a three-dimensional view. Figure 26c shows a

Section through the first stamping wheel 4a along the section line CC, wherein in particular the outer part 4q and the inner part 4r can be seen. In the direction of the outer part 4q and spaced from the stamping wheel 4a arranged on both sides depending on an induction device 4n, which in the illustrated embodiment as

Helmholz coils are formed. This induction device 4n forms, together with the outer part 4q, an induction heater, wherein the heat generated in the outer part 4q can be controlled via the Helmholtz coil supplied current and the frequency. In an advantageous embodiment, the inner part 4a consists of a good heat-conducting material,

so that the heat generated in the outer part 4q is again quickly dissipated. It may also be advantageous to provide a cooling device, for example a fan arranged next to the embossing wheel 4a. The arrangement shown in Figure 26c allows a fast and very precise heating of the outer part 4q or a very fast and very precise heating or cooling of the located between the embossing wheels 4a, 4b strip 2c, 2e. If the embossing wheel 4a is additionally provided with a cooling device, the heating or cooling of the strip 2c, 2e can take place more precisely. The temperature, together with the pressure, is the most important parameter for influencing the chemical reaction taking place in the strip 2c, 2e, which takes place due to the polycondensation. The temperature is preferably controlled in such a way that the strip 2c, 2e located in the embossing wheel 4a, 4b has a temperature in the range between 120 ° C. and 280 ° C.

FIG. 26d shows in a side view a further embodiment of a particularly advantageous embodiment of an embossing tooth 4c of the embossing wheel 4a. In contrast to the embossing teeth 4c shown in FIG. 26b or 26b, the embossing tooth 4c shown in FIG. 26d has a depression 4s which has a length 4t in the circumferential direction. In a particularly advantageous embodiment of a stamping wheel 4a, each stamping tooth 4c has a recess 4s with the same length 4t, wherein the geometric shape of the recess 4s of subordinate ter meaning. The depression 4s has the consequence that during the rolling of the embossing wheels 4a in the running direction of the strip 2c, 2e no pressure point 4p is formed everywhere, where the recess 4s of the one embossing wheel 4a, 4b to the opposite embossing wheel 4b, 4a lie comes, so that in this section no or only a very small pressure on the strip 2c, 2e acts. In FIG. 6c, in one possible embodiment, such sections are designated by 2 ×. If the outer part 4q is heated, this also means that the strip 2c, 2e is exposed to a lower temperature in the section of the length 4t or in the section 2x, since the strip 2c, 2e is heated less at this point. This has the consequence that the crosslinking or the chemical reaction taking place in the strip 2c, 2e does not take place or is less rapid. Thus, a patterned strip 2e can be produced, which in the course direction sections with different networked! Binder comprises, for example, sections such as the side surfaces 2k, in which the binder is crosslinked to thermoset, and sections such as the sections 2x, in which the binder is not or only partially crosslinked to thermoset. Such sections 2x are also referred to herein as contact sections 2h, 2i. Such a structured semi-honeycomb strip 2e can be connected to the honeycomb structure 10 particularly advantageously at the stop edge 10a, since, as shown in FIG. 10e, the sections located between the stop 27 and the punch 21a correspond to the section 2x according to FIG. 6c correspond. In a particularly preferred embodiment, the plunger 21a and the stopper 27 are heated, preferably also with an induction heater. In addition, it is preferable to exert a pressure on the section located between the stop 27 and the punch 21a via the punch 21a, so that the polycondensation and / or the crosslinking of the binder to thermosetting takes place and the two located between stop 27 and punch 21a sections mutually connect well, or are welded together and form a thermosetting compound. This results in a particularly advantageous connection, so that the supplied structured strip 2e becomes part of the honeycomb structure 10.

FIG. 26n shows, in a side view, a further exemplary embodiment of a particularly advantageous embodiment of three embossing teeth 4c of a stamping wheel 4a successively following one another in the circumferential direction. All embossing teeth 4c have the recess 4s of length 4t already described in FIG. 26d. In addition, the depressions 4d between the embossing teeth 4c have the same depressions 4s of the length 4t as the embossing teeth 4c. With two embossing wheels 4a which engage in one another, this configuration has the result that no pressure is exerted on the strip material 2 located therebetween along the length 4t, and the strip material 2 experiences no or little or reduced heating, since the strip material 2 passes along this section does not come into direct contact with the embossing wheels 4a. In the strip material 2, this makes it possible to produce contact sections 2h, 2i along which the condensation reaction did not take place or only in part.

FIG. 27 shows, in a side view, schematically a forming device 4 comprising a first stamping wheel 4a which is mounted on a hub 4k and which is driven by a drive device 4h, eg an electric motor. A second embossing wheel 4b is mounted on a hub 41, and is driven by a drive device 4i, eg an electric motor. The two embossing wheels 4a, b engage each other. In an advantageous embodiment, the two hubs 4k, 41 are connected to one another via a pressure generating device 4m, preferably via an electrically controllable pressure generating device 4m, in order by a corresponding de driving this pressure generating device 4m to generate a force KL, and to cause the force exerted on the strip 2c, 2e pressing force at the pressure point 4p shown in Figure 26b. In one possible embodiment, at least the drive devices 4h, 4i are controllable by a control device 30 in order to control the rotational speed, as well as the increase and reduction of the rotational speed and / or the torque Da, Db about the axes of rotation 4y, 4z. In a further advantageous embodiment, an induction device 4n is additionally arranged on at least one of the embossing wheels 4a, 4b in order to heat the embossing wheels 4a, 4b as described in FIG. 26c. The induction device 4n is preferably also controllable by the control device 30, wherein in particular not shown temperature sensors could be connected to the control device 30, wherein these temperature sensors, for example, the temperature of the embossing wheels 4a, 4b or the temperature of the strips 2c, 2e capture to such with the aid of the induction device 4n to form a controllable induction heater, which makes it possible to precisely control the heating of the strip 2c, 2e. In a further possible embodiment, moreover, cooling devices 4o could also be provided, in particular also controllable cooling devices 4o, in order to cool the embossing wheels 4a.4b also, preferably to cool them via the regulating device 30. The pressure generating device 4m could also be configured as a purely mechanical pressure generating device such as a spring.

In a particularly advantageous embodiment, the forming device 4 is configured such that the embossing wheels 4a, 4b can be replaced, for example by embossing wheels 4a, 4b with the same diameter but a different width D and / or embossing wheels 4a, 4b arranged differently or geometrically differently configured teeth, such as shown in Figures 5a and 5b, and / or embossing wheels 4a, 4b with a larger or smaller diameter. In a particularly advantageous embodiment, the forming and feeding device 32 and the stop device 34 are designed such that they could process a maximum width B of a strip 2c, 2e and narrower strips 2c, 2e, for example by the height of the stop 27 for processing a strip is designed with maximum width B. The production device 1 according to the invention thus has the advantage that the strips 2c, 2e, which could be processed with the same production device 1, can have an arbitrary width below the maximum width B. The structure of a structured strip 2e produced by the shaping device 4 can be changed in a simple manner by exchanging the two embossing wheels 4a, 4b. The production apparatus 1 according to the invention is therefore extremely flexible, because in an advantageous embodiment only the embossing wheels 4a, 4b are to be exchanged, in order to form a wide variety of honeycomb structures 10. If a cutting device 23 is used, the width B of the strips 2e can be determined via the cutting device 23. However, in order to avoid cutting waste at best, it may be advantageous to exchange the strip material 2 with the replacement of the embossing wheels 4a, 4b in order to use a strip material of suitable width, so that no cutting is necessary.

Figure 26e shows a partial view of a

Section through the two embossing wheels 4a, 4b with strips 2c, 2e arranged therebetween, at which point the transition takes place between the unstructured strip 2c and the structured strip 2e. In the exemplary embodiment shown, the surface 4v is designed to extend in a V-shape so that a higher pressure is generated in the middle region 2y of the strip 2c, 2e than in the edge region 2z of the strip 2c, 2e. The V-shaped course of the surface 4v is shown overdrawn for better visibility, the center region 2y in one advantageous embodiment, for example, 0.1 mm to 1 mm with respect to the edge region of the first and / or second embossing wheel 4a, 4b projecting. This causes an extrusion force 4w directed towards the edge region 2z, with which, for example, the condensation products released during the polycondensation are pressed out of the strip material 2 in the direction of the edge region 2z. The surface '4v may be designed to extend in a variety of ways, in order to produce an extrusion force 4w directed towards the edge region 2z.

FIG. 26f shows a plan view of the unstructured strip 2c and the structured strip 2e, with the pressure point 4p, which has a length 4u, and which moves in the running direction of the strip 2c, 2e. In addition, the center region 2y of the strip 2c, 2e and the edge region 2z are shown. The pressure point 4p advantageously has a length 4u between 1 mm and 10 mm. .

Figure 26g shows a partial view of a

Section through a stamping wheel 4a. The surface 4v is configured to extend in a similar manner as shown in FIG. 26e, wherein the surface 4v, as shown, also has a structured surface, such as a microstructure, for causing an uneven force on the strip 2c, 2e, and for pressing out condensation products support. The substantially V-shaped course of the surface 4r is shown oversubscribed for better visibility, wherein the central region protrudes in an advantageous embodiment, for example 0.1 mm to 1 mm with respect to the edge region of the first and / or second embossing wheel 4a, 4b.

FIG. 26h shows a partial view of a plan view of the surface 4d, 4g of a stamping wheel 4a, eg as shown in FIG. 26d. The surface 4v comprises linear elevations 4x, which are shown in FIG. 26i in a section along the section line DD, wherein the height of the elevations is 4x for the better. Ren visibility are shown oversubscribed. The height of the elevations 4x, also depending on the thickness of the strip 2c, is advantageously in the range between 0.1 mm to 2 mm. The elevations 4x cause a structuring or embossing of the strip 2e, as shown in FIG. 26k. The regions 2k have such depressions 2j. FIG. 261 shows, as a section through the strip 2e, exemplary possible recesses 2j. In the illustrated embodiment, the recesses 2j are always parallel. However, the recesses 2j may be in a variety of ways. The recesses 2j have, for example, the advantage that the mechanical stability of the thermoset, semi-honeycomb strip 2e can be improved. The depressions 2j also have, for example, the advantage that the condensation products released during the polycondensation can be better pressed out of the strip material 2. The half-honeycomb strip 2e may be provided on such a side or on both sides with such recesses 2j or with such an embossing. The depressions 2j can be arranged to run continuously in the direction of progression of the strip 2e, or only in sections as shown in FIG. 26k.

Figure 26m shows schematically the already in

Figure 27 shown, occurring at the embossing wheels 4a, 4b forces and moments. The first stamping wheel 4a is rotatably supported around the rotation center 4y, while the second stamping wheel 4b is rotatably supported around the rotation center 4z. The embossing wheels 4a, b rotate in the direction of rotation 4za or 4zb. The drive devices 4h, 4i cause a torque Da or Db. The pressure generating device 4m generates a force KL. Essentially the sum of the force KL and the torques Da and Db causes the resulting force K acting on the pressure point 4p. The resultant force K can thus be controlled by the control device 30 via one or both of the torques Da and Db and the force KL be controlled. The pressure generating device 4m can be actively configured so that a controllable force KL can be generated, or can be made passive, for example as a spring or spring system, so that the force KL is not controllable. In an advantageous method step, the half-honeycomb strip 2e, 2f, after it is formed, cooled, wherein the half-honeycomb-shaped strip 2e, 2f is held during the cooling in particular dimensionally stable.

In an advantageous method step, the strip material 2 is preheated to a temperature between 50 ° C and 120 ° C before being fed into the embossing wheels 4a, 4b.

In an advantageous method step, the pressure caused on the strip material 2 is controlled by each embossing wheel 4a, 4b being driven individually and the torque of at least one or each of the embossing wheels 4a, 4b being individually controlled.

In an advantageous method step, the two embossing wheels 4a, 4b are pressed against one another with a controllable linear force KL, wherein a controllable torque Da, Db is effected on each embossing wheel 4a, 4b, and wherein the linear force KL and the torques Da, Db are such be controlled that between the two embossing wheels 4a, 4b results in a predetermined pressure acting on the strip material 2.

FIG. 28 shows a plan view of an unstructured strip 2a. This has cut-out 2u on or protruding tabs 2w. FIG. 28a shows a structured strip 2e formed from the strip 2a according to FIG. 28 in a plan view, wherein the strip 2e rests on a base plate 9, and only the lower, protruding tabs 2w lying on the base plate 9 are shown. These tabs 2w have, for example, the advantage that a particularly advantageous connection between the strip 2e and the base plates 9 is possible. FIG. 29 shows in a plan view and FIG. 29a in a side view the production of a double-layer sandwich structure 33 comprising a base layer 33a, a first honeycomb structure 33b, 10, an intermediate layer 33c, a second honeycomb structure 33d, 10 and a cover layer 33e. Structured strips 2e, 2f are supplied to the abutment edges 10a by means of the feed device 32 and inserted and struck with the aid of the stop device 34, as shown in FIG. 29, so that the first and second honeycomb structures 33b, 33d are formed. In addition, a roller with intermediate layer 33 and cover layer 33e is mounted on the axes 33f, 33h so that they are placed on the corresponding honeycomb structure 33b, 33d, as shown in FIG. 29a.

FIG. 29b shows a plan view and FIG

29c shows in a side view the production of a further double-layered sandwich structure 33 comprising a base layer 33a, a first honeycomb structure 33b, 10, an intermediate layer 33c, a second honeycomb structure 33d, 10 and a cover layer 33e. At the abutment edge 10a, a structured strip 2e is fed by means of the feeder 32 and inserted and struck by means of the stopper 34 as shown in Fig. 29b. An intermediate layer 33c is applied to the first honeycomb structure 33b by being rotatably mounted above an axis 33f as a supply roll 33g. After the complete production of the first honeycomb structure 33b and the covering with the intermediate layer 33c, a structured strip 2f is then introduced by means of a feed device 32 to form a second honeycomb structure 33d, the strip 2f extending perpendicular to the structured strip 2e. Thus, a sandwich structure 33 is formed with two mutually perpendicular honeycomb structures 33b, 33d. It is also possible, for example, to omit certain strips 2e, thereby forming a depression 10d or 1d form through channel lOd in the sandwich structure 33.

FIG. 29d shows a top view of a composite structure comprising a honeycomb structure 10 with structured strips 2e, 2f connected via connecting points 2s. Below the honeycomb structure 10, an intermediate layer 33c is arranged. As a conclusion, a connecting strip 2e3 is connected on the right with the structured strip 2e arranged on the right. FIG. 29e shows the arrangement shown in FIG. 29d along the section line DD. FIG. 29e shows two honeycomb structures 10, one upper and one lower, consisting of structured strips 2e, 2f connected via connecting points 2s. Between the honeycomb structures 10, the intermediate layer 33c is arranged. The upper and lower honeycomb structures 10 are connected to each other via the connecting strips 2e3. The connecting strip 2e3 gives the advantage that the upper and lower honeycomb structures 10 are mutually held in a defined position. This results in the advantage that the intermediate layer 33c does not have to have a supporting function and therefore, for example, can also be designed as a compressible material, such as an insulating material. In a further advantageous embodiment, the composite structure shown in Figures 29d and 29e, as indicated by the connecting element 2e4, a plurality of connecting strips 2e3 and / or connecting elements 2e4 to keep two honeycomb structures 10 mutually spaced. The connecting elements 2e4 can, as shown in FIG. 29d, be designed to be relatively short in the course direction of the strips 2e, 2f. The compound Zvi ^¬ rule the connecting strip or the connecting elements 2e3 2e4 and the patterned strip 2e of the upper and lower honeycomb structure 10 could, for example, an adhesive connection or a thermosetting compound to be.

FIG. 30 schematically shows an apparatus for producing a thermoset honeycomb structure 10 from a strip material 2, wherein the strip material 2 essentially consists of a fiber material, in particular of a paper web, which is preimpregnated with a binder which crosslinks to a thermoset. The strip material 2 is fed to a device 32 for producing a thermosetting, semi-honeycomb strip 2e, 2f, which forms a duroplastic, semi-honeycomb strip 2e, 2f from the strip material using pressure and temperature. The thermoset, half-honeycomb strips 2e, 2f are fed to a temporary storage 36 and then fed by a feed device 37 and a positioning device 38 to a connecting device 21, 34 which calls the thermoset, semi-honeycomb strips 2e, 2f a honeycomb structure 10, also honeycomb carpet 10 , connect. Advantageously, the honeycomb carpet 10 has a stop edge 10a, with which a duroplastic, half-honeycomb strip 2e, 2f is connected, this strip 2e, 2f, which is now part of the honeycomb carpet 10, also the stop edge 10a for the next thermoset, semi-honeycomb formed strip 2e, 2f. It would also be possible to dispense with a buffer 36 in that the thermoset, half-honeycomb strips 2e, 2f reach the feeding device 37 directly after the device 32. Another possible method could be that for the time being only with a device 32, the thermoset, semi-honeycomb strips 2e, 2f are made. These thermoset, semi-honeycomb strips 2e, 2f could be stored and, if necessary, also transported to another location in order to produce the honeycomb structure 10 with the aid of the devices 37, 38 and 34 at a later time and possibly also at another location.

A possible method for the continuous production of a honeycomb structure 10 is characterized in that two strip materials 2a, 2b provided with a polymer material or a silicate are to be structured. formed strips 2e, 2f are formed; the two structured strips 2e, 2f are brought together and joined together to form a honeycomb structure 2g, wherein a thermoplastic or thermosetting compound or a silicate connection is formed between the two structured strips 2e, 2f, such that the honeycomb structure 2g has a predetermined length to form a honeycomb strip 13 that the honeycomb strip 13 has a stop side 13b which is intended to abut a stop edge 10a of the honeycomb structure 10, that the stop side of the honeycomb strip 13 and / or the stop edge 10a of the honeycomb structure 10 is provided with an adhesive, and that the stop side 13b of the honeycomb strip 13 of the stop edge 10a of the honeycomb structure 10 is fed and glued to it, so that the honeycomb strip 13 forms part of the honeycomb structure 10, wherein the last supplied and glued honeycomb strip 13 forms a stop edge 10a, to which the next following honeycomb strip 13 we glued d.

In another possible method, the strip material 2a, 2b is provided with a polymeric material, and the strip material 2a, 2b is heated prior to patterning.

A possible device 1 for continuously producing a honeycomb structure 10, comprising a feed 20 for at least two strip materials 2 a, 2 b, comprises a shaping device 4, 5 for structuring each strip material 2 a, 2 b into a structured strip 2 e, 2 f, comprises a connecting device 6 for mutually positioning and joining the two structured strips 2e, 2f to a honeycomb structure 2g, comprises a cutting device 7 for cutting the honeycomb structure 2g into a honeycomb strip 13, comprises a support surface 9 for depositing the honeycomb strip 13, comprises an adhesive supply device 12 for providing a stopper side 13b of the honeycomb strip 13 and / or a stop edge 10a of the honeycomb structure 10 with a glue and a feeding device 17 in order to feed the honeycomb strip 13 with its stop side 13b of the stop edge 10a of the honeycomb structure 10, thereby bonding the honeycomb strip 13 to the honeycomb structure 10.

One possible honeycomb structure comprises a plurality of honeycomb strips, each honeycomb strip consisting of two strips comprising contact sections, and opposite contact sections of the two

Each honeycomb strip each having a stop edge 10a and an adhesive surface 13b, and wherein in each case one stop edge 10a and an adhesive surface 13b of two adjacently arranged honeycomb strip 13 over an adhesive bond 22 are firmly connected together.

In an advantageous embodiment, the apparatus 1 for producing a honeycomb structure 10 from strip material 2 comprises a feeding and shaping device 32 which forms a structured strip 2e, 2f from the strip material 2 and also determines a conveying speed of the structured strip 2e, 2f, and comprises a stop device 34 with an insertion channel 34a, wherein the abutment device 34 of the shaping device 32 is arranged downstream such that the structured strip 2e, 2f can be fed to the insertion channel 34a, and wherein the honeycomb structure 10 has a stop edge 10a which is parallel to the insertion channel 34a runs, and wherein the stopper device 34 comprises a stop 27 and stop means 21a, 21b, which are designed to be movable so that the structured strip 2e, 2f with a stop edge 10a of the honeycomb structure 10 is connectable.

Advantageously, the feed and

Forming device 32, a first and a second embossing wheel 4a, 4b with mutually interlocking embossing teeth 4c, wherein the first and second embossing wheels 4a, 4b are mutually adapted so that the strip material 2 can be arranged to extend between the first and second embossing wheels 4a, 4b and during rotation of the first and second embossing wheels 4a, 4b to the structured strip 2e, 2f is moldable, wherein the rotational speed of the first and second embossing wheel 4a, 4b also determines the conveying speed of the structured strip 2e, 2f.

The stop 27 and the stop means

21a, 21b are preferably designed to be movable so that the stop 27 and the stop means 21a, 21b comprise the structured strip 2e, 2f and the stop edge 10a of one side each, so that the structured strips 2e, 2f and the stop edge 10a against each other are pressable.

In an advantageous embodiment, the embossing wheels 4a, 4b are designed to extend in the circumferential direction in such a way that the structured strip 2e, 2f only deflections 2m that run in an arcuate manner but no

Has kinks.

In an advantageous embodiment, the first and second embossing wheels 4a, 4b are interchangeably arranged, wherein a plurality of sets of first and second embossing wheels 4a, 4b are available, with each

Set of first and second embossing wheel 4a, 4b a differently structured strip 2e, 2f can be generated.

In an advantageous embodiment, air nozzles and / or outlet openings 27h for a gaseous fluid are arranged along the entry channel 34a, which are oriented in such a way that they support the entry of the structured strip 2e, 2f into the entry channel 34a.

In an advantageous embodiment, at least the rotational speed of the embossing wheels 4a, 4b as well as the heating device 3 and / or the induction device 4n are controlled with a control device 30, in that the structured strip 2e, 2f in the feeding and shaping device 32 has a predetermined temperature. In an advantageous embodiment, the stamping wheels 4a, 4b are followed by a controllable cutting device 7, which cuts the structured strip 2e, 2f such that the length of the structured strip 2e, 2f substantially corresponds to the width of the honeycomb structure 10.

In an advantageous embodiment, see between the embossing wheels 4a, 4b and the entry channel 34a, a memory 36 is arranged for temporarily storing the conveyed from the embossing wheels 4a, 4b structured strip 2e, 2f.

In an advantageous method for producing a honeycomb structure 10 from strip material 2, the strip material 2 is formed into a structured strip 2e, 2f, wherein the structured strip 2e, 2f is fed to a stop edge 10a of a honeycomb structure 10, and wherein the structured strip 2e, 2f is connected to the stop edge 10a, so that the patterned strip 2e, 2f becomes a part of the honeycomb structure 10.

In an advantageous method step, the embossing wheels are rotated so fast that the

Strip material 2 and / or the embossing wheels 4a, 4b are heated such that the structured strips 2e, 2f between the embossing wheels 4a, 4b or after leaving the embossing wheels 4a, 4b have a predetermined temperature.

In an advantageous method step, the conveying speed of the structured strip 2e, 2f is determined by the rotational speed of the embossing wheels 4a, 4b. In an advantageous method step, sections 2 x, 2 f are produced in the structured strip 2, onto which the embossing wheels 4 a, 4 b have exerted no or a reduced pressing force. In an advantageous method step, the structured strip 2e, 2f is moved synchronously with the rotational speed of the embossing wheels 4a, 4b of the impact edge 10a of the honeycomb structure 10 is supplied. In a further advantageous method step, the embossing wheels 4a, b are operated continuously.

In a further advantageous method step, the structured strip 2e, 2f is cut, whereby the structured strip 2e, 2f conveyed after the cutting by the embossing wheels 4a, 4b is temporarily stored at least until the structured strip 2e, 2f previously located in the entry channel 34a is removed from the entry channel 34a, and the subsequent, partially stored structured strip 2e, 2f is thereafter introduced into the entry channel 34a.

A machine for producing a thermosetting honeycomb structure 10 from a multiplicity of thermoplastic half-honeycomb strips 2e, 2f comprises, in an advantageous embodiment, a feed device 37 for half-honeycomb strips 2e, 2f, comprising a positioning device 38 for feeding a supplied semi-honeycomb strip 2e, 2f at connection points 2s with respect to a stop edge 10a of a honeycomb structure 10, and comprises a connecting device 21, 34 for connecting the supplied semi-honeycomb strip 2e, 2f at connection points 2s to the honeycomb structure 10.

The connecting device 34 advantageously also comprises a plurality of punches 21a, which are heatable and generate a pressure, wherein the stamper 21a are arranged with respect to a fed semi-honeycomb strip 2e, 2f and the stop edge 10a of the honeycomb structure 10 such that the punches 21a at the Connections 2s act to cause at the junction 2s crosslinking of the binder to the thermoset.

Claims

claims

1. Device (1) for producing a honeycomb structure (10) from a strip material (2),

- wherein the strip material (2), which strip material (2) contains in particular a fiber material, and in particular consists of a paper web, is preimpregnated with a binder which crosslinks to a thermoset,

- wherein the device (1) comprises means for embossing thermoset, semi-honeycomb strips (2e, 2f) of the strip material (2),

- The device (1) comprises a connecting device (21,34) for connecting the semi-honeycomb strips (2e, 2f) or of at least two half-honeycomb strips (2e, 2f) formed honeycomb strips (2g) at connection points (2s) to a honeycomb structure (10), and

- Wherein the device (1) means for heating the honeycomb strip (2g) or the honeycomb structure

(10) for curing the joints (2s).

2. Device (1) according to claim 1, with a transport means for passing the honeycomb strips (2g) or the honeycomb structure (10) on the means for heating.

A device (1) according to claim 1 or 2, wherein the means for heating in a conveying direction of the honeycomb structure (10) or the honeycomb strips (2e, 2f) following the connecting device

(21,34) are arranged.

4. Device (1) according to one of the preceding claims, wherein the means for heating for radiating heat to the connection points (2s) are aligned.

5. Device (1) according to one of the preceding claims, wherein the means for heating a Infrared radiator and / or a radiator (100, 101) included.

6. Device (1) according to one of the preceding claims, wherein the device (1) at least one feed device (37) for semi-honeycomb strips (2e, 2f) or for at least two half-honeycomb strips (2e, 2f) formed honeycomb strip (2g ) having .

7. Device (1) according to one of the preceding claims, in which the means for embossing comprise a first and a second embossing wheel (4a, b) each having a circumferential contact surface (4v) and circumferentially spaced embossing teeth (4) 4c) and interposed depressions (4d), wherein the first and the second embossing wheel (4a, 4b) configured so mutually adapted and mutually interlocking, that between the first and the second embossing wheel (4a, 4b) a line or planar pressure point (4p) arises, which moves along the contact surface (4v) during the rotation of the embossing wheels (4a, 4b) in order to produce a rolling pressure point (4p) moving along the strip material (2), wherein a pressure generating device, (4m) connected to the first and second embossing wheels (4a, 4b) to generate pressure between the embossing wheels (4a, b), and having j e a drive device (4h, 4i) for driving the first and the second embossing wheel (4a, 4b), and comprising a heating device (4j) for at least one of the embossing wheels (4a, 4b), and having a control device (30), which at least with one of the drive devices (4h, 4i) signal-transmitting connected to rotate the embossing wheels (4a, 4b) in opposite directions in a conveying direction (F) and to the pressure generating device (4m) and the drive devices (4h, 4i) the pressure point (4p) to generate a controllable pressure.

8. Device (1) according to claim 7, wherein the pressure generating device (4m) is controllable, and in which the controllable pressure generating device (4m) is signal transmitting connected to the control device (30) to the embossing wheels (4a, b) to rotate in the same direction in a conveying direction (F), and to generate a controllable pressure via the controllable pressure generating device (4m) and the drive devices (4h, i) at the pressure point (4p).

9. Device (1) according to one of the preceding claims, wherein the means for embossing are configured to produce a portion (2h, 2i) in the half-carton strip (2e, 2f), along which the binder is not or only partially to a thermoset is networked.

10. Device (1) according to any one of claims 7 or 8, wherein the contact surface (4v) at least one embossing wheel (4a, 4b) has at least one circumferentially extending recess (4s), wherein the recess (4s) arranged and configured in that the strip material (2) does not touch the embossing wheel (4a, 4b) along the recess (4s) to produce in the strip material (2) a section (2h, 2i) along which the binder does not or only partially to a Thermoset is crosslinked.

11. Device (1) according to any one of claims 7, 8 or 10, wherein the contact surfaces (4v) of both embossing wheels (4a, 4b) at least each have a circumferentially extending recess (4s), wherein the two recesses (4s ) are arranged and adapted to one another in such a way that the two depressions (4s) lie opposite one another in order not to touch the strip material (2) on both sides along the depressions (4s).

12. Device (1) according to one of the claims

7, 8, 10 or 11, wherein the embossing wheels (4a, 4b) controllably so mutually rotatable and / or mutually are spaced apart, that at least one of the embossing wheels (4a, b) touches the strip material (2) along a portion (2h, 2i) without force and / or even not touched to the strip material (2) along this section (2h, 2i) exposure to a pressure and / or a temperature which does not crosslink the binder or only partially to a thermoset.

13. Device (1) according to any one of claims 7, 8, 10, 11 or 12, wherein the contact surfaces (4v) are designed to extend in such a way that the pressure point (4p) in a central region (2y) of the strip material (2) produces higher pressure than in an edge region (2z) in order to push the condensation products formed during the condensation reaction of the binder in the strip material (2) towards the edge region (2z).

14. Device (1) according to one of the preceding claims, wherein the means for embossing a plurality of exchangeable embossing wheels (4a, 4b) having different diameters and / or differently extending contact surfaces (4v) and / or differently shaped embossing teeth (4c) to produce differently structured half-honeycomb strips (2e, 2f).

15. Device (1) according to claim 7, wherein the heating device (4i) is configured such that the embossing teeth (4c) of at least one embossing wheel (4a, 4b) consist of a ferromagnetic material, and that an induction device (4n) is arranged to inductively heat the embossing teeth (4c).

16. Device (1) according to claim 7, wherein the first and / or second embossing wheel (4a, 4b) has a structured contact surface (4v) in order to effect embossing in the half-honeycomb strip (2e, 2f).

17. Device (1) according to one of the preceding claims, in which a separating means is provided, which comprises the strip material (2) and / or the half-honeycomb material. shaped and / or honeycomb strip (2e, 2f, 2g) separates in the direction in at least two strips.

18. Device (1) according to claim 17, wherein the separating means comprise the strip material (2) and / or the half-honeycomb and / or honeycomb strips

(2.2e, 2f, 2g) in the direction along at least one perforated line (1) and / or by cutting separates.

19. Device (1) according to one of the preceding claims, comprising a positioning device

(38) for positioning a fed semi-honeycomb strip (2e, 2f) at the connection points (2s) with respect to a stop edge (10a) of the honeycomb structure (10), each connecting device (34) having a plurality of punches (21a) can be heated and generate a pressure, wherein the punches (21a) are arranged with respect to a fed, half-honeycomb-shaped and / or honey-shaped strip (2e, 2f) and the stop edge (10a) of the honeycomb structure (10), that the punches (21a ) acting on their connection points (2s) in order to effect crosslinking of the binder to the thermoset at the connection point (2s).

20. Device (1) according to claim 19, in which the punches (21a) have a pressing surface with a structured surface in order to effect embossing of the connection points (2s).

21. Device (1) according to one of the preceding claims 14 to 16, comprising a temporary store (36) for temporarily storing the half-honeycomb strips (2e, 2f), the temporary store (36) following the means for embossing and before the connecting device (34). is arranged.

22. Device (1) according to claim 17 or 18, comprising a plurality of means for embossing thermoplastic half-honeycomb strips (2e, 2f), and comprising a holding device (20) for a roll of strip material (2) of overall width ( 3B), wherein the Separating means comprises a second cutting device (18) for synchronously cutting strip material (2) on a width (B) from the roll of strip material (2).

23. A method for producing a honeycomb structure (10) from a strip material (2), which strip material (2) in particular contains a fiber material, and in particular consists of a paper web, is pre-impregnated with a thermoset-crosslinking binder,

- where thermosetting, semi-honeycomb stripes

(2e, 2f) are embossed from the strip material (2),

- Wherein the half-honeycomb-shaped strips (2e, 2f) or from at least two half-honeycomb strips

(2e, 2f) formed honeycomb strips (2g) are connected at joints (2s) to a honeycomb structure (10), and

- Wherein the honeycomb strips (2g) or the honeycomb structure (10) are heated to cure the joints (2s).

24. The method of claim 23, wherein the honeycomb strips (2g) or the honeycomb structures (10) with at least one infrared radiator and / or at least one radiator (100, 101) are heated.

25. The method of claim 23 or 24, wherein the strip material (2) is heated, wherein a first and a second embossing wheel (4a, 4b), each having a circumferentially extending contact surface (4v) with circumferentially spaced embossing teeth ( 4c) and recesses (4d) arranged therebetween are each driven in rotation by one drive device (4h, 4i) in opposite directions in a conveying direction (F), wherein at least one of the embossing wheels (4a, 4b) is heated, wherein the first and the second embossing wheels ( 4a, 4b) are configured mutually adapted and mutually interlocking arranged that on a between the first and the second embossing wheel (4a, b) extending strip material (2) a line or sheet-like Pressure point (4p) is generated, which in particular continuously along the conveyed in the conveying direction (F) strip material (2) moves, wherein the first and the second embossing wheel (4a, b) are pressed against each other with a compressive force (KL), and wherein the drive devices (4h, 4i) effect a torque (Da) on the first embossing wheel (4a) and a torque (Db) on the second embossing wheel (4b), wherein at least one of the torques (Da, Db) is controllable, that by the sum of compressive force (KL) and torques (Da, Db) at the

Pressure point (4p) a controllable resulting pressure (K) is generated, in particular in a range between 10 bar and 300 bar.

26. The method of claim 25, wherein the first and the second embossing wheel (4a, 4b) with a controllable pressure force (KL) are pressed against each other, and that at least one of the torques (Da, Db) and the pressing force (KL) is controllable in such a way that a controllably resulting pressure (K) is produced by the sum of pressure force (KL) and torques (Da, Db) at the pressure point (4p).

27. The method of claim 25 or 26, wherein the strip material (2) in sections none

Compressive force (KL) and / or no heating is exposed, thereby to create joints (2s) in the strip material (2), where the binder is not or only partially cross-linked to the thermoset.

28. A method for producing a thermosetting honeycomb structure (10) from a strip material (2), wherein the strip material (2), which strip material in particular contains a fiber material, and in particular consists of a paper web, is pre-impregnated with a thermoset-crosslinking binder in that the strip material (2) is heated and subjected to a resultant compressive force (K) and thereby formed into thermoset, half-honeycomb strips (2e, 2f), the strip material (2) being cut in sections. it is not subjected to compressive force (K) and / or heating, thereby producing joints (2s) where the binder is not or only partially crosslinked to the thermoset, the thermoset, semi-honeycomb strips (2e, 2f) being at their joints (2s) are joined together to a honeycomb structure (10) or at least a honeycomb strip (2g) by heating and subjecting mutually adjacent joints (2s) to compressive force, and the joints of the honeycomb structure (10) or honeycomb strip (2g ) are then cured by heating, in particular by means of infrared radiators and / or radiators (100, 101).