DE102019003684B4 - Device and method for the assembly of material plates - Google Patents

Abstract

Device (1) for assembling material plates (10), in particular for dividing a web material (2) extending along three spatial directions (X, Y, Z) and having finite dimensions in at least two spatial directions (Y, Z), wherein the device (1) comprises at least one separating device (5) having a separating tool (3) and a base (4) and a guide device (6), wherein at least the base (4) of the separating device (5) is arranged to be movable along the guide device (6), wherein the device (1) has a first drive (7) for moving the separating tool (3) relative to the base (4) and a second drive (8) for moving the base (4) relative to the guide device (6), characterized in that at least one drive (7, 8) is provided for switching between a motor and a generator operation.

Description

The invention relates to a device for assembling material plates, in particular for dividing a web product extending along three spatial directions and having finite dimensions in at least two spatial directions, wherein the device comprises at least one separating device having a separating tool and a base and a guide device, wherein at least the base of the separating device is arranged to be movable along the guide device, wherein the device has a first drive for moving the separating tool relative to the base and a second drive for moving the base relative to the guide device.

The invention further relates to a method for assembling material plates, in particular for dividing a web material extending along three spatial directions and having finite dimensions in at least two spatial directions, wherein material plates are separated one after the other from the web material with the aid of a separating tool arranged on a base belonging to a separating device, for which purpose the base is moved along a guide device belonging to the same separating device, wherein a first drive drives the separating tool and a second drive moves the base along the guide device.

The production of material plates takes place either in a cyclical or continuous manner. In cyclical production, the material plates are produced as flat objects with finite dimensions in all three spatial directions, while the material plates produced in a continuous process represent cut-to-length strips with finite dimensions in only two spatial directions. The way the joining and/or compacting unit works determines whether the overall process is described as a cyclical or continuous process. Since the compacting units, or the combined joining and compacting units, generally work with significant pressures when producing material plates, these units are usually referred to by experts as a press part in relation to an entire system. When producing material plates as defined in this document, the working pressures here, depending on the material and size of the material plate to be produced, are usually in the range between approximately 80 N/cm ² and 330 N/cm ² and, in this case, advantageously between 130 N/cm ² and 280 N/cm ² .

In the sense of the present document, the material panels preferably consist of composite materials and preferably of fiber composites, in particular wood composites, gypsum composites, fabric composites and/or reinforced thermoplastics. Wood composites include, for example, pressboard, OSB material (oriented strand board material), MDF material (medium-density wood fiber material), HDF material (high-density wood fiber material), multiplex, plywood, lightweight panels, Fournier laminated wood, etc. Gypsum composites are understood here in particular to mean the various types of plasterboard. The term fabric composites is understood to mean composites in which at least one composite part comprises a fabric. This is most often the case with so-called fabric-reinforced laminates. In the simplest form, however, the term can also include a fabric that is simply impregnated. In general usage, reinforced thermoplastics are understood to mean all (fiber)-reinforced thermoplastics.

In the sense of the present document, a material plate can also consist of a mixed composite in the form of a laminate, provided that at least one layer of the laminate corresponds to one of the described composite materials.

Depending on the composite and panel thickness, the surface weights are between approximately 3.0 kg/m ² and around 55.0 kg/m ² . Typical panel sizes today are around 1.8 m to 3.7 m wide and between 4.0 m and 12.0 m, usually 6.0 m long. This can result in total weights of over 2,400 kg per material panel.

The advantages of cycle-controlled press parts are mainly the more cost-effective machine design. Continuously operating press parts and corresponding manufacturing processes, on the other hand, are characterized by significantly increased productivity and thus lower overall production costs. For example, in general only two of the four side edges of a material plate need to be trimmed in order to achieve sufficiently homogeneous product properties across the entire plate. The applicant's ContiRoll ^® presses are the technological leaders here.

New generations of ContiRoll ^® presses are designed to achieve increased production speeds. The plan is to increase the possible production speed by around 50% from around 2 meters/second web speed to around 3 meters/second web speed.

This represents an enormous challenge for the devices connected to the press, as they are responsible for the transition from a continuous to a discrete production and/or are responsible for the further processing process or are already completely designed for the discrete processing of the material panels created from the web material. These devices in the so-called finishing areas include, for example, longitudinal cutters, such as trimming or edge cutting devices, cross cutters, such as multi-diagonal cutters, cooling and storage devices, pre-stacking and stacking systems, marking areas, packaging devices, and various transport units.

These devices, which are assigned to the final production areas, must be able to follow the production speed of the press upstream of them in terms of their production capacity in order not to unnecessarily reduce the overall productivity of the material plate production plant.

Since, in contrast to continuously operating production processes, discretely operating production processes also include standstill and acceleration phases that alternate with the utilization phases, the processing speeds within the utilization phases must be higher than they are in a corresponding, continuously operating production process.

A special position among the devices in the finishing areas is occupied by the cross-cutting devices, which are also generally called finishing devices, and by separating material plates limited in three dimensions from a web material limited in only two dimensions and moving at a web material speed, they transform the production process from a continuous mode of operation to a discrete mode of operation.

Cross-cutting devices known from the state of the art usually comprise a cutting device which is generally guided over a crossbeam at an angle to the moving web material. Such cross-cutting devices are used, for example, in the DE 32 17 941 A1 , the EN 100 02 802 A1 or the EN 10 2004 015 891 A1 described. In order for the cross-cutting device to be able to produce rectangular material plates from the moving web material, its movement speed must be synchronized with the web speed depending on the angle. In order to obtain clean cuts or material plate edges, the cutting speed of the cutting edges, which usually rotate around an axis that is linearly displaced along the traverse, must also be synchronized accordingly.

As can be seen from the documents mentioned, in the past several cross-cutting devices were arranged one behind the other, or a cross-cutting device was equipped with several cutting devices in order to enable increased productivity of the material plate production plants.

In addition, the drive units were adapted to the increasing requirements.

In order to meet the described requirements of the new generations of ContiRoll ^® presses and their increased production speeds (web speeds), the utilization and acceleration phases must be optimized and the downtime phases minimized.

However, simple physics shows that an increase in acceleration capability of 50% would mean an increase in the engine power required to three times the output power. If you then take other aspects into account, such as the resulting increase in inertia of the drive unit, the power requirement increases even further.

In order to avoid the need to slow down and restart the drive motor of a saw to the desired working speed, as is the case with conventional systems, DE 197 02 281 A1 It is proposed that a drive motor serving for the tool movement and continuously operable in one direction of rotation should be followed by a means communicating with it that changes the transfer movement direction of the machining tool while maintaining the motor rotation direction in order to prevent maximum energy losses.

In order to optimize a target curve in a multi-axis machine for the on-the-fly processing of conveyed material, there is also a state-of-the-art EN 10 2011 012 481 A1 Notes.

Accordingly, one object of the invention is to offer the operator of a material board production plant, in particular for wood material boards, an option for the assembly of material boards that is particularly economical in operation. In particular, the energy costs incurred for the assembly of material boards from a web material moved at a high production speed are to be reduced.

The object of the invention is achieved in a device of the type mentioned above in that at least one drive for changing between is intended for motor and generator operation.

This enables the recovery of at least part of the energy that would otherwise be dissipated as heat when braking the cutting tool or in the deceleration process of the base, which greatly improves the economic efficiency of the device's operation. The drive in question can take on the role of a brake in generator mode and can even completely replace an otherwise necessary brake in certain cases, so that, for example, only an emergency brake can be provided, which is not used or only used to a very limited extent in normal operation.

It is preferred that the device comprises a power storage device and preferably a control system operatively connected to the power storage device.

In this way, a particularly economical energy balance is possible. The energy recovered (or reclaimed) through generator operation can of course also be made available at another location in the device or in a system adjacent to or above the device, either indirectly, i.e. after intermediate storage, or directly.

However, the provision of a power storage device within the device offers the advantage of short paths and the avoidance of energy losses in long cable routes.

The power storage device may preferably comprise a capacitor.

It may further be preferred that the power storage device has a discharge point and is operatively connected to at least one consumer, in particular a motor, which has a substantially constant energy requirement during normal operation.

Although this requires the control system to be designed to calculate a constant amount of energy to be delivered from an amount of energy fed into the storage unit in bursts, this is a particularly good way to reduce the necessary energy costs.

It may also be preferred that the power storage device has a take-off point and is operatively connected to at least one consumer, in particular one of the drives, which has an energy requirement of varying magnitude during normal operation.

For this purpose, it is advantageous if the power storage device is designed to provide high voltages at least for a short time.

Even if this may be somewhat inferior to the overall efficiency of the previously described embodiment, such an embodiment may be preferred because it makes it possible to cover smaller maximum supply peaks from the power grid. Since the safeguarding of supply peaks that can be called up from the (public) power grid, which is necessary for the operation of a material board production plant, such as may be necessary when starting up plants in the megawatt range, often leads to high contract costs, it is important for the operator to keep the maximum size of these supply peaks small. For this purpose, a power storage device into which energy was previously fed that was previously uselessly converted into wear and heat can be of great value.

In some cases it may be advantageous if at least one drive is designed as an electric rotary motor.

Such drives are inexpensive to purchase. In addition, rotary motors are available on the market that can easily be set up for generator operation. It is therefore conceivable that existing devices that have a drive designed as a rotary motor can be upgraded or converted in accordance with the invention using appropriate measures such as connections, control, storage devices and/or the like.

It can also be advantageous if at least one drive is designed as a linear motor.

Linear motors have particularly good acceleration values and are well suited to accelerating small to medium masses, up to a range of around 300 kg, quickly, precisely and efficiently. This alone can have a positive influence on the energy balance of the device.

Preferably, at least one drive has a rated power in the range between 2.5 KW and 19.5 KW, in particular in the range between 4.0 KW and 14.5 KW, most particularly between 4.5 KW and 9.5 KW.

Surprisingly, tests have shown that these relatively low power ranges in conjunction with the provision of a linear motor are already suitable for the processing of material panels, for example wood-based panels with strength between 2.5 mm and 70 mm are completely sufficient.

It may be advantageous if the device comprises a transport device forming a transport path for transporting the web material and/or the material plates or is operatively connected to such a transport device.

The provision of a transport device forming a transport path for transporting a web product and/or material plates offers the possibility of guiding the material plate to be separated for the assembly of the material plates ("mother plate") or preferably the web product to be separated past the separating device of the device and of carrying out the separation during the movement of the web product and/or the (forming) material plate(s).

For this purpose, it may be preferred that the transport path comprises a section of a transport means which is preferably drivable with the aid of the motor and is arranged in a circulating manner.

In this way, the material plate to be separated (“mother plate”) or preferably the web material to be separated can be guided past the device’s separating mechanism in a constant operating mode. This avoids unnecessary start/stop processes and the associated unnecessary wear and energy consumption.

Advantageously, the device comprises at least one further separating device.

This means that the device can cut relatively short material plates even from a mother plate or web material that is moved past the cutting devices relatively quickly, since one cutting device is ready for use when the other cutting device is not ready for use, for example on its way back to its starting position. For example, material plates with a length (in the direction of movement along the transport path) of 4.0 meters to 6.0 meters can be cut even if the transport speed (along the transport path) is 2.5 m/s to 3.0 m/s, for example.

In a method for assembling material plates, in particular for dividing a web material extending along three spatial directions and having finite dimensions in at least two spatial directions, wherein material plates are separated one after the other from the web material with the aid of a separating tool arranged on a base belonging to a separating device, for which purpose the base is moved along a guide device belonging to the same separating device, wherein a first drive drives the separating tool and a second drive moves the base along the guide device, the object of the invention is achieved in that during an operating period at least one drive changes at least once between a motor and a generator operation.

For this purpose, it is preferred that the method is carried out using a device according to one of claims 1 to 10.

The advantages resulting from the application of the method and use of the device can be taken from the description of the advantages of the device or can be easily transferred or derived from it.

• 1: Darstellung einer Werkstoffplattenerzeugungsanlage mit sich daran anschließender Querschneideeinrichtung und Vorrichtung zum Transport von Werkstoffplatten nach Stand der Technik in einer perspektivischen Ansicht.
• 2: Schematische Darstellung einer Vorrichtung zur Konfektionierung von Werkstoffplatten

The invention is explained in more detail below with reference to a drawing which merely represents an exemplary embodiment. In the drawing:

• 1 : Representation of a material plate production plant with adjoining cross-cutting device and device for transporting material plates according to the state of the art in a perspective view.
• 2 : Schematic representation of a device for the assembly of material plates

1 shows in a perspective view a representation of a section of a material plate production plant 23 with an adjoining device 1 for the assembly of material plates 10 as is known from the prior art.

The material plate production system 23 is arranged in a space such that its longitudinal direction is along an X-axis, its transverse direction (width) is along a Y-axis and its height direction is along a Z-axis. The section shown also corresponds to at least part of a system for transporting and in particular for separating and dividing material plates 10, which emerge as an endless web 2 from a production system 34, which in particular has a continuously operating press - such as a ContiRoll ^® press from the applicant -, wherein a device 1 for preparing material plates 10, in particular for dividing the web 2 extending along three spatial directions X, Y, Z and having finite dimensions in at least two spatial directions Y, Z can also comprise, wherein the device 1 comprises at least one separating device 5 comprising a separating tool 3 and a base 4 and a guide device 6, wherein at least the base 4 of the Separating device 5 is arranged to be movable along the guide device 6, wherein the device 1 has a first drive for moving the separating tool 3 relative to the base 4 and a second drive for moving the base 4 relative to the guide device 6.

The device 1 can comprise a transport device 17 forming a transport path 18 for transporting the web material 2 and/or the material plates 10 or can be operatively connected to such a transport device 17.

2 now shows an embodiment of a device 1 according to the invention for assembling material plates 10 in a schematic representation. The device 1 shown therein for assembling material plates 10, in particular for dividing a web material 2 extending along three spatial directions X, Y, Z and having finite dimensions in at least two spatial directions Y, Z, wherein the device 1 comprises at least one separating device 5 having a separating tool 3 and a base 4 and a guide device 6, wherein at least the base 4 of the separating device 5 is arranged to be movable along the guide device 6, wherein the device 1 has a first drive 7 for moving the separating tool 3 relative to the base 4 and a second drive 8 for moving the base 4 relative to the guide device 6, is characterized, among other things, by a third drive 9, which is provided for moving the same base 4 relative to the guide device 6 as the second drive 8.

The device has a control device 27 by means of which at least the second drive 8 and the third drive 9 can be controlled and/or regulated and which, in the case shown, is also suitable for wireless data transmission. However, the control device 27 can alternatively or additionally also be suitable for wired data transmission.

In the illustrated phase within a normal operation of the device 1, the cutting tool 3 is in engagement with the web material 2, which is transported by the transport device 17 along a transport path 18 essentially in the X direction - i.e. out of the image plane. As the cutting process continues, a material plate 10 is formed from the left edge of the image, i.e. from the direction of the first side 24. The cutting tool is driven by a first drive 7 and in this case rotates about an axis that is part of the base 4. The base 4 is in turn driven by a second drive 8, which moves a rotating belt 35, which is designed to be detachably connected to the base via a coupling 22 and thus indirectly to a third drive 9. The third drive 9 and the second drive 8 differ in their design. While the second drive 8 is designed as a rotary motor 19, the third drive is designed as a linear motor 20. Although both the second drive 8 and the third drive 9 are within a rated power range between 4.0 KW and 12.5 KW, they differ from each other in their rated power.

The third drive 9, designed as a linear motor 20, comprises a rail 11 and two movers 12 and 13, which are arranged in a fixed position opposite the guide rail 6 on a frame, while the rail 11 is connected to the base 4. In the case shown, the rail 11 is shorter (in the Y direction) than the usable area 14 is wide (also in the Y direction). However, the resulting overlapping effective length on one side 24 or 25 of the web material 2 to be separated is sufficient for the third drive 9 to accelerate the second drive 8 sufficiently to bring the base 4 to a speed that is necessary for a straight and error-free separation cut of the web material 2 when the base 4 is moved at an angle to the transport direction of the web material 2 over the material to be separated.

In one of the secondary areas 15 or 16 arranged next to the usable area 14, the base is accelerated over a relatively short distance by both drives 8 and 9 and then only moved by drive 8 in the usable area. This is done in a space-saving and energy-saving manner. Since the rail 11 is automatically uncoupled when it leaves the effective range of the respective mover 12 or 13, one can also speak of a type of coupling at the end point of the respective mover facing the web material.

Alternatively, however, the rail can also be designed in a form not shown that is so long (in the Y direction) that it at least completely covers the usable area (in the Y direction).

The movers 12 and 13 are each operatively connected to a cooling device 21. Of course, this can also be the same cooling device 21, which only has two effective areas.

While the linear motor 20 acts in motor mode during the acceleration of the base 4, it acts in generator mode during the deceleration of the base 4 required after the separation process and is thus suitable for converting part of the kinetic energy to be reduced in the deceleration process into storable energy and feeding this to a storage device.

For the return path, i.e. the path during which the separating tool 3 is not to be brought into operative engagement with the web material 2 to be separated, the separating tool is designed to be liftable upwards (in the Z direction) due to the telescopic design of the base 4 and can thus be changed in its distance A from the web material.

In order to support a particularly precise separation process, but also, for example, to optimize the energy management of the linear motor 20 and thus also of the device 1, the rail 11 of the linear motor has indicators 36 - here even two for redundancy reasons.

Energy “gained” by the linear motor in generator mode can be made available directly or indirectly (via a power storage device 26) to an electrical consumer of the device 1 or the material plate production plant 23. In the case shown, the power storage device has a take-off point 32 via which the drive 8 designed as a rotary motor 19 can retrieve energy. For this purpose, the drive 8 and/or the power storage device 26 can be controlled or regulated accordingly via the control device 27. In addition, the power storage device 26 has a take-off point 33 which is open for the connection of an electrical consumer, but could for example be connected to an electrical consumer within the device 1 or the material plate production plant 23.

It goes without saying that several separating devices 5, 5' or 5, 5' and 5'' can be arranged one after the other in the image plane within the described device 1. Several devices 1 can also be arranged one after the other along the transport path 18.

It is also self-evident that further separating devices 5' or 5'' can be constructed in accordance with the described separating device 5 and can be arranged to be movable along the same guide device 6 or along separate guide devices 6' or 6'' associated with them. 2 A base 4' is shown as a representative of further separating devices 5', 5'' and possibly associated guide devices 6', 6'' as well as corresponding drives 7', 7'', 8', 8'', 9', 9'', which is located here in the direction of movement of the web material to be separated even before the described arrangement of separating tool 3, base 4, guide device 6 and drives 7 to 9. However, this order is only for better representation and its naming is of course reversible.

The embodiment shown can be adapted, varied and expanded in many ways within the disclosure content of the present document, without departing from the scope of the invention.

For example, embodiments are also conceivable which provide only one drive per base, whereby the drive can be designed as a simple rotary motor, for example.

List of reference symbols

1

device

2

Roll goods

3

Cutting tool

4

base

5

Separator

5'

second separator / further separator

6

Guide device

7

first drive

8

second drive

9

third drive

10

Material plate

11

rail

12

Mover (first mover)

13

additional mover (second mover)

13'

another mover

13''

another mover

14

Usable area

15

Side area

16

Side area

17

Transport facility

18

Transport path

19

Rotary motor

20

Linear motor

21

Cooling device

22

coupling

23

Material plate production plant

24

first page

25

second page

26

Power storage device

27

steering

28

indicator

29

Rotary motor

30

Motor

31

Means of transport

32

Collection point

33

Collection point

34

Production plant (continuously operating press)

35

belt

36

Indicaor

A

Distance

X

Spatial direction, longitudinal direction

Y

Spatial direction, transverse direction

Z

Spatial direction, height direction

Claims (12)

Device (1) for assembling material plates (10), in particular for dividing a web material (2) extending along three spatial directions (X, Y, Z) and having finite dimensions in at least two spatial directions (Y, Z), wherein the device (1) comprises at least one separating device (5) having a separating tool (3) and a base (4) and a guide device (6), wherein at least the base (4) of the separating device (5) is arranged to be movable along the guide device (6), wherein the device (1) has a first drive (7) for moving the separating tool (3) relative to the base (4) and a second drive (8) for moving the base (4) relative to the guide device (6), characterized in that at least one drive (7, 8) is provided for changing between a motor and a generator operation. Device (1) according to Claim 1 , characterized in that the device (1) comprises a power storage device (26) and preferably a control (27) operatively connected to the power storage device (26). Device (1) according to Claim 2 , characterized in that the power storage device (26) has a take-off point (31, 32) and is operatively connected to at least one consumer, in particular a motor (30), which has a substantially constant energy requirement in normal operation. Device (1) according to Claim 2 or 3 , characterized in that the power storage device (26) has a take-off point (32, 33) and is operatively connected to at least one consumer, in particular one of the drives (7, 8), which has an energy requirement of varying magnitude during normal operation. Device (1) according to one of the preceding claims, characterized in that at least one drive (7, 8) is designed as an electric rotary motor (29). Device (1) according to one of the preceding claims, characterized in that at least one drive (7, 8) is designed as a linear motor (20). Device (1) according to one of the preceding claims, characterized in that at least one drive (7, 8) has a nominal power in the range between 2.5 KW and 19.5 KW, in particular in the range between 4.0 KW and 14.5 KW, very particularly between 4.5 KW and 9.5 KW. Device (1) according to one of the preceding claims, characterized in that the device comprises a transport device (17) forming a transport path (18) for transporting the web material (2) and/or the material plates (10) or is operatively connected to such a transport device (17). Device (1) according to the preceding claim, characterized in that the transport path (18) comprises a section of a transport means (31) which is arranged in a circulating manner and can preferably be driven with the aid of the motor (30). Device (1) according to one of the preceding claims, characterized in that the device (1) comprises at least one further separating device (5'). Method for assembling material plates (10), in particular for dividing a web material (2) extending along three spatial directions (X, Y, Z) and having finite dimensions in at least two spatial directions (Y, Z), wherein material plates (10) are separated one after the other from the web material (2) with the aid of a separating tool (3) arranged on a base (4) belonging to a separating device (5), for which purpose the base (4) is moved along a guide device (6) belonging to the same separating device (5), wherein a first drive (7) drives the separating tool (3) and a second drive (8) moves the base (4) along the guide device (6), characterized in that during an operating period at least one drive (7, 8) changes at least once between a motor and a generator operation. Method according to the preceding claim, characterized in that the method is carried out using a device according to one of the Claims 1 until 10 is carried out.

Images