[go: up one dir, main page]

WO2014008917A1 - Dispositif et procédé destinés au dosage continu de fibres discontinues sur des machines à vis sans fin - Google Patents

Dispositif et procédé destinés au dosage continu de fibres discontinues sur des machines à vis sans fin Download PDF

Info

Publication number
WO2014008917A1
WO2014008917A1 PCT/EP2012/063427 EP2012063427W WO2014008917A1 WO 2014008917 A1 WO2014008917 A1 WO 2014008917A1 EP 2012063427 W EP2012063427 W EP 2012063427W WO 2014008917 A1 WO2014008917 A1 WO 2014008917A1
Authority
WO
WIPO (PCT)
Prior art keywords
extruder
fiber
scrim
fibers
metering
Prior art date
Application number
PCT/EP2012/063427
Other languages
German (de)
English (en)
Inventor
Martin Danzer
Renate LÜTZKENDORF
Thomas Reussmann
Gerald Ortlepp
Original Assignee
Thüringisches Institut für Textil- und Kunststoff-Forschung e.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. filed Critical Thüringisches Institut für Textil- und Kunststoff-Forschung e.V.
Priority to PCT/EP2012/063427 priority Critical patent/WO2014008917A1/fr
Publication of WO2014008917A1 publication Critical patent/WO2014008917A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
    • B29C45/1816—Feeding auxiliary material, e.g. colouring material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fillers or of fibrous materials, e.g. short-fibre reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/29—Feeding the extrusion material to the extruder in liquid form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • B29C2043/3405—Feeding the material to the mould or the compression means using carrying means
    • B29C2043/3416—Feeding the material to the mould or the compression means using carrying means conveyor belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/44—Compression means for making articles of indefinite length
    • B29C43/48—Endless belts
    • B29C2043/483—Endless belts cooperating with a second endless belt, i.e. double band presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements

Definitions

  • the invention relates to a device comprising a screw machine, in particular an extruder, with a metering unit for the continuous metering of finely long textile fiber materials for this extruder, comprising at least a first horizontally arranged conveyor belt, on the upper side of a fiber-produced scrims with a defined basis weight and laying width is stored, and comprising a screw machine, in particular an extruder with a feed slot to which the scrim is fed continuously.
  • the term "screw machines” includes, in particular, extruders, but also, for example, injection molding machines and the like are covered by this term
  • Continuous dosing of the fiber material is of great importance, since in the current process a constant fiber content, a homogeneous fiber distribution in the melt and a good wetting of the fiber material with the polymer matrix must be realized.
  • great problems occur (bridging in the funnel, variations in mass, uneven fiber distribution), making it possible to use fiber materials such as voluminous synthetic fibers or also fiberglass from recycling processes with undefined fiber length distribution (recycling glass fibers, recycled carbon fibers, etc.) have not yet been fed continuously to extruders.
  • the dosage of fiber materials is predominantly realized with conventional gravimetric dosing scales. But this is only possible when using free-flowing short-cut fibers.
  • the fiber length of the cut fibers is usually in a range of 3 to 10 mm and is limited upwards by the geometry of the feed zone of the extruder.
  • the fiber bundles are coated with sizing and hold together even with a mechanical stress of the fibers through the screws of the metering.
  • a sufficient flowability for a continuous metering must be given. This is practically only possible with the supply of relatively heavy fiber bundles. For fiber materials with low density and high degree of dissolution (strong separation of the fibers), this method is not suitable.
  • the reinforcing fiber material is fed through a lateral opening of the screw machine and mixed in the plasticizing cylinder with the polymer melt.
  • the reinforcing fiber material in the screw machine has to be shortened both defined and mixed with the polymer melt and homogenized. This usually requires a special machine configuration.
  • this variant of fiber dosing requires endless reinforcing fiber strands (rovings) that can transmit high tensile forces to ensure continuous fiber feed. This is no problem when using virgin material (glass rovings or carbon fiber rovings).
  • finely long fibers e.g. Natural fibers or glass or carbon recycled fibers is not possible.
  • hybrid tapes made of a fiber blend of reinforcing and matrix staple fibers are first produced by means of a carding machine and deposited in cans.
  • the fiber content is adjusted with the mixing ratio of reinforcing and matrix fibers.
  • the matrix fibers act in the sliver as a carrier material for the reinforcing fibers and thus also allow the handling of poorly flowing reinforcing fibers.
  • the filling process in plasticizing or injection molding machines is carried out by the rotation of the screw, whereby the hybrid belts are fed into the cylinder.
  • the feed speed and metered amount of material can be controlled by the screw speed, as well as the number and weight of the hybrid belts.
  • the thermoplastic matrix fibers are melted at the appropriate processing temperatures, resulting in a plastically deformable, long-fiber reinforced molding material.
  • the metering of the hybrid belts by the rotation of the screw takes place until the desired metering volume of plastic material in the discharge chamber is reached. Subsequently, by a feed movement of the screw, the discharge of the plastic material into the cavity of the tool for the production of fiber-reinforced plastic parts.
  • a metering device for short cut fibers which consists of two opposing belts and at least one screw conveyor.
  • the belts help to transport, while the screw, which is located between the belts, to promote the fiber material.
  • This feeding principle works only with vertically arranged feeders. No compaction is mentioned or intended, and no measures are taken. taken to maintain a possible compression by the inclined belt conveyor walls and prevent subsequent expansion when the limit is eliminated.
  • This combination is not suitable for the metering of long fibers (fiber length greater than 10 mm), since the fibers can wrap around the conveyor screw and thus lead to a blockage of the metering device.
  • This type of metering is suitable only for short fibers whose cut length is significantly smaller than the circumference of the metering screw.
  • a good flowability of the bulk material is needed to allow the transport with a screw conveyor. This is not the case with long fibers with very low bulk density.
  • the fiber material When feeding in endless rovings, the fiber material is wound up by the screws and cut or broken at special cutting edges. This works only with brittle fiber materials such as glass or carbon fibers.
  • EP 1 21 1 046 A2 describes a process with the principle of direct feed of fiber materials on screw machines. This patent also mentions the dosing of fiber webs or fiber mats having a defined basis weight and a predetermined width. However, the fact that these materials must have a certain minimum tensile strength in order to be wound up by the screws of the mixing extruder can not be described in any detail. This is only given for rovings or solidified nonwovens. In addition, the nonwovens must have a thickness which is smaller than the slot width of the mixing extruder, so that the fiber material can be fed trouble-free. This is not the case when dosing non-solidified fiber webs.
  • Unreinforced fiber scrims have a very low tensile strength, which can be generated practically only by fiber-to-fiber friction. This is not enough for one tear-free and continuous intake of the fiber material.
  • Another problem with feeding staple fiber webs is the large volume due to the low bulk density of the material. In each case, a pre-compaction of the fibers is required in order to come to layer thicknesses which are smaller than the slot width of the extruder. It must also be prevented that the fiber material expands again after the pre-compression. A continuous collection of fiber layers is therefore not possible with the device described.
  • Devices for the guided transport of a fiber flake mat are basically known from the prior art and are described for example in DE 10 2007 014 694 A1. These devices are used to achieve guided transport of a fiber flake mat to a carding machine.
  • a pressure belt is arranged above a conveyor belt, wherein a gap is formed between the two belts.
  • the pressure belt is pivotable and can therefore be inclined to the conveyor belt, so that the gap decreases in the conveying direction of the fiber flake mat and the fiber flake mat is compressed between the two bands.
  • the document gives no suggestion how to simultaneously feed fiber materials and a polymer melt to an extruder.
  • British Patent Specification GB 1 399 463 A describes an apparatus by means of which a fiber mat is first produced from continuous rovings or short fibers and then impregnated by rollers with a liquid resin, so that an impregnated fiber mat is obtained.
  • a polyethylene film is then applied to the fiber mat and so produces a laminate.
  • an already dimensionally stable product which is then transported on a conveyor belt and compacted by means of another parallel conveyor belt. Only the resin-impregnated mat or laminate are then placed in a funnel over which they then enter an extrusion machine.
  • a structurally complex device is used to create a product from fibers, which can be fed to an extruder. The task of supplying a fiber scrim virtually directly to an extruder is not solved here.
  • the present invention is therefore based on the object to provide a way for continuous metering of finely long textile fiber materials to an extruder, the direct processing of finite long, poor flowable loose fiber materials on conventional extruders (Screw machines) allows.
  • the device further comprises at least a second conveyor belt, which is arranged above the first conveyor belt with a gap distance to this and at an acute angle to this, such that the gap distance between the two conveyor belts in the conveying direction to the intake slot of the extruder tapers and the passing between two conveyor belts scrim is compacted by the conveyor belts before reaching the intake slot of the extruder and that the metering device further comprises a slot nozzle for a polymer melt which merges in the catchment area of the extruder with the scrim or introduced between two scrims becomes.
  • the device according to the invention is suitable for the continuous supply of hard-to-dose fiber materials to screw machines, wherein the fibers are first deposited by a laying device in a defined width and basis weight on a conveyor belt and subsequently fed continuously under defined compression to an extruder.
  • the fiber fabric is not an independent, manageable semi-finished product (such as tape, nonwoven or the like), which results from known textile processing stages (nonwoven production and carding) and is not solidified.
  • Fabric fabrics can be produced with both short fiber and long fiber metering equipment.
  • the basis weight of the fabric is adjustable in a very wide range from 50 g / m 2 to 5000 g / m 2 , thereby allowing optimum adaptation to the subsequent processing process in the screw machine.
  • the compressed scrim is preferably deflected and subsequent relaxation or expansion of the fiber layer is prevented.
  • the width of the fabric is in a range of about 100 mm to about 600 mm and the basis weight of the fabric is preferably in a range of about 50 g / m 2 to about 5000 g / m 2 .
  • the scrim of the invention may consist of natural fibers or man-made fibers and / or other fibrous materials on an organic or inorganic basis, in particular the scrim may for example consist of recycled natural fibers or man-made fibers and / or other fibers on an organic or inorganic basis.
  • the scrim of the invention may also consist, for example, of a mixture of different fibers and also pulverulent constituents.
  • the present invention furthermore relates to a process for the continuous metering of finely long textile fiber materials on extruders using an extruder with a metering device of the aforementioned type, in which first a fiber of a defined basis weight and width is produced on a conveyor belt stored and continuously loaned to the extruder, and then the scrim by means of an arrangement comprising at least two conveyor belts, between which it passes through, to a defined thickness which is smaller than the thickness of the intake slot on the extruder is compressed.
  • the first horizontal lower conveyor belt is arranged relative to the intake slot of the extruder such that the clutch experiences a deflection of at least approximately 90 ° before or during the entry into the extruder.
  • a possible variant of the invention provides that at least two arrangements of each double bands, each with a first lower conveyor belt and a second upper conveyor belt are provided, both arrangements are each provided for transporting and compacting each Geleges and fed both scrim an extruder are, with both double bands each with their head sides, where the gap distance between the two conveyor belts of a double belt is the lowest, facing each other.
  • Fiber scrims can be produced with conventional feeders, spreaders or spreaders.
  • feeder or Leger used to produce a uniform fiber template.
  • scattering devices such as are known, for example, from the processing of wood fibers or short textile fibers are used.
  • the eggs produced in this way are very voluminous nös and have no cohesion of the fibers. As a result, the dosage of such scrim to screw machines via a special metering device.
  • Figure 1 shows a first exemplary embodiment of an apparatus according to the invention for the continuous metering of fiber materials to an extruder in a schematically simplified side view
  • Figure 2 shows a second alternative exemplary embodiment of a device according to the invention in a schematically simplified side view
  • Figure 3 is a simplified schematic plan view of the device shown in Figure 2 for the continuous dosing of fiber materials
  • Figure 4 shows a third alternative exemplary embodiment of a device according to the invention in a schematically simplified side view.
  • the fiber fabric 1 is deposited on a first conveyor belt 2 and conveyed continuously.
  • the clutch is uniformly compressed and fed to the extruder.
  • the compaction is carried out to a thickness of the fabric of less than or equal to 20 mm, to ensure a collection of the fiber material at the extruder.
  • a special baffle 4 the fiber material is deflected after exiting the two conveyor belts and introduced directly into the nip of the extruder with a slot-shaped feed zone.
  • the baffle is necessary in this embodiment, in order to allow accurate guidance and deflection of the fiber material and to ensure that the fiber material does not expand again after leaving the double belt and clogs the intake opening of the extruder.
  • a polymer film 6 is produced by means of a slot die 5, which has the same width as the fiber fabric.
  • the melt film and the fiber material are brought together and continuously into the Drawn in extruder. This method of metering achieves a homogeneous and uniform mixture of fiber material and melt in the extruder.
  • the extruder housing 8 has two co-rotating screws 7.
  • Advantage of the invention is the possibility of continuous supply of both hard-to-sized short fibers and long staple fibers and the decoupling of fiber metering and screw speed. Due to the speed of the conveyor belt and the metered amount of polymer melt, the fiber content can thus be set very precisely and a continuous production process can be realized.
  • the fiber material 10 of 2 feeders 1 1 and 12 placed on two double bands 13 and 14 and subsequently merged.
  • the polymer melt 15 is introduced via a slot die 16 whose width is equal to the width of the fiber fabric, between the two fiber layers.
  • the melt penetrates the fiber material and a fibrous web 17 with a thickness smaller than the thickness of the draw slit at the extruder and with sufficient tensile strength to move the fiber / polymer mixture into the worms 18 of the Feed extruder 19.
  • a relaxation / expansion of the compacted fiber material is prevented by the impact of the polymer melt film.
  • Both double belts each have a first lower conveyor belt and a second upper conveyor belt, with both belts running towards each other in the conveying direction at an acute angle to one another, thereby gradually compressing the fabric transported between the conveyor belt.
  • the two double bands are arranged so that both double bands each serve for transporting and compacting each jelly 10 and both scrims are fed to an extruder, with both double bands each having their top sides at which the slit distance between the two conveyor belts of a double belt is the lowest, facing each other.
  • the top view according to FIG. 3 shows that the polymer melt 15 discharged from the slot die 16 emerges virtually directly above the intake slot of the extruder, is brought together on both sides with the two compacted fiber layers 10 and then the resulting fiber-polymer mixture as a soaked fiber web 17 immediately in the arranged underneath the intake slot of the extruder.
  • the two fiber webs 10 fed from the right or the left each have a width which, in the example, is slightly smaller than the width of the two conveyor belts 13, 14 which feed the fiber webs and it can be seen that the fiber web Infeed slot of the extruder has a Einzugssbreite which is at least equal to, preferably slightly larger than the width of the retracted Fasergelege.
  • Figure 4 shows another embodiment with two double bands in a similar arrangement as previously described with reference to Figure 2.
  • the same principle for the dosage of fiber material is used on counter-rotating twin-screw extruders.
  • the fibrous material impregnated with polymer melt is then drawn in between the counter-rotating screws 18 of the extruder.
  • a scrim of recycled aramid fibers with a fineness of 1, 7 dtex and a mean fiber length of 40 mm is placed on a conveyor belt.
  • the fiber fabric has a width of 300 mm and a basis weight of 200 g / m 2 .
  • This clutch is continuously compressed at a speed of 4 m / min with another conveyor belt to a height of 8 mm and fed to a co-rotating twin-screw extruder with a screw diameter of 75 mm.
  • a polymer film of molten polyamide with a width of 300 mm is fed into the feed zone of the twin-screw extruder via a single-screw extruder with 80 mm screw diameter and slot die.
  • the set throughput of the single-screw extruder is 35 kg / h.
  • fibers and matrix material are mixed homogeneously and gentle on the fibers and subsequently discharged through a nozzle as a plasticate.
  • the plasticizer strand is replaced by a suitable Cut the cutting edge to length and press the blanks so produced into components using a press.
  • a nest of wood fibers with a mean fiber length of 5 mm is produced and deposited on a conveyor belt with a width of 300 mm.
  • the basis weight of the fabric is 500 g / m 2 .
  • the scrim is continuously compressed at a speed of 4 m / min between 2 conveyor belts to a height of 10 mm and fed to a twin-screw extruder with a screw diameter of 75 mm.
  • a polymer film of molten polypropylene in a width of 300 mm is fed into the feed zone of the twin-screw extruder via a single-screw extruder with 80 mm screw diameter and slot die.
  • the set flow rate of the screw extruder is 70 kg / h.
  • fibers and matrix material are mixed homogeneously and then discharged as plasticizer through a nozzle.
  • the plastic strand is cut to length by a suitable cutting edge and the blanks produced in this way are pressed into components using a press.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Dispositif comprenant une extrudeuse équipée d'un doseur destiné au dosage continu de fibres textiles de longueur finie, sur ladite extrudeuse ; procédé utilisant la présente extrudeuse équipée d'un dispositif de dosage, où un intissé (1), avec une surface et une largeur définies, est produit à partir des fibres, puis placé sur une bande transporteuse (2) et acheminé en continu vers l'extrudeuse. Selon l'invention, l'intissé est compacté au moyen d'un dispositif comprenant au moins deux bandes transporteuses (2, 3), entre lesquelles il passe, sur une épaisseur définie, inférieure à l'épaisseur de la fente d'introduction se trouvant sur l'extrudeuse ; selon l'invention, l'intissé (1) est soumis à une déflection d'au moins 90° par un déflecteur, avant ou pendant l'introduction dans l'extrudeuse. Le procédé permet le traitement direct sur des machines à vis sans fin de fibres de renforcement de longueur finie, coulant difficilement.
PCT/EP2012/063427 2012-07-09 2012-07-09 Dispositif et procédé destinés au dosage continu de fibres discontinues sur des machines à vis sans fin WO2014008917A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/063427 WO2014008917A1 (fr) 2012-07-09 2012-07-09 Dispositif et procédé destinés au dosage continu de fibres discontinues sur des machines à vis sans fin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/063427 WO2014008917A1 (fr) 2012-07-09 2012-07-09 Dispositif et procédé destinés au dosage continu de fibres discontinues sur des machines à vis sans fin

Publications (1)

Publication Number Publication Date
WO2014008917A1 true WO2014008917A1 (fr) 2014-01-16

Family

ID=46514342

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/063427 WO2014008917A1 (fr) 2012-07-09 2012-07-09 Dispositif et procédé destinés au dosage continu de fibres discontinues sur des machines à vis sans fin

Country Status (1)

Country Link
WO (1) WO2014008917A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104002454A (zh) * 2014-05-26 2014-08-27 安徽中意胶带有限责任公司 一种双面四层贴面整芯阻燃输送带面胶专用挤出机
US10011049B1 (en) 2017-07-24 2018-07-03 Aerlyte, Inc. Fiber-reinforced molding compounds and methods of forming and using the same

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT307012B (de) * 1969-12-12 1973-05-10 Buss Ag Einrichtung zur kontinuierlichen Herstellung von faserstoffhaltigen Preßmassen
GB1399463A (en) 1971-09-28 1975-07-02 Baker Perkins Chem Mach Manufacture of plastics moulding materials and products thereof
EP0383246A2 (fr) * 1989-02-14 1990-08-22 Maschinenfabrik Rieter Ag Procédé et appareil pour alimenter les flocons de fibres en quantité donnée
EP0706873A2 (fr) * 1994-10-12 1996-04-17 Sumitomo Chemical Company Limited Appareil à vis et méthode d'utilisation de cet appareil pour distribuer de la résine fondue comprenant des fibres
DE19712440A1 (de) * 1997-03-25 1998-10-01 Hymmen Theodor Gmbh Vorrichtung zum Herstellen von Span- oder Faserplatten aus Zellulosewerkstoffen
DE19756126A1 (de) 1997-12-17 1999-06-24 Thueringisches Inst Textil Verfahren zur Herstellung von faserverstärkten Kunststofferzeugnissen mit Langfaserverstärkung insbesondere m. endl. langen Verstärkungsfasern
EP0979719A2 (fr) * 1998-08-13 2000-02-16 Maschinenfabrik J. Dieffenbacher GmbH & Co. Procédé et extrudeuse de plastification pour produire des compositions polymères renforcées par des fibres
EP1211046A2 (fr) 2000-11-30 2002-06-05 Maschinenfabrik J. Dieffenbacher GmbH & Co. Procédé et dispositif pour la fabrication de compositions polymères renforcées de fibres
DE102007014694A1 (de) 2007-03-27 2008-10-09 Oskar Dilo Maschinenfabrik Kg Vorrichtung zum geführten Transport einer Faserflockenmatte
DE102007047548A1 (de) 2007-09-28 2009-04-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung zum Zuführen von kurzen Fasern
DE102012100637A1 (de) * 2011-01-26 2012-07-26 Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. Verfahren zur kontinuierlichen Dosierung von Stapelfasern an Schneckenmaschinen

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT307012B (de) * 1969-12-12 1973-05-10 Buss Ag Einrichtung zur kontinuierlichen Herstellung von faserstoffhaltigen Preßmassen
GB1399463A (en) 1971-09-28 1975-07-02 Baker Perkins Chem Mach Manufacture of plastics moulding materials and products thereof
EP0383246A2 (fr) * 1989-02-14 1990-08-22 Maschinenfabrik Rieter Ag Procédé et appareil pour alimenter les flocons de fibres en quantité donnée
EP0706873A2 (fr) * 1994-10-12 1996-04-17 Sumitomo Chemical Company Limited Appareil à vis et méthode d'utilisation de cet appareil pour distribuer de la résine fondue comprenant des fibres
DE19712440A1 (de) * 1997-03-25 1998-10-01 Hymmen Theodor Gmbh Vorrichtung zum Herstellen von Span- oder Faserplatten aus Zellulosewerkstoffen
DE19756126A1 (de) 1997-12-17 1999-06-24 Thueringisches Inst Textil Verfahren zur Herstellung von faserverstärkten Kunststofferzeugnissen mit Langfaserverstärkung insbesondere m. endl. langen Verstärkungsfasern
EP0979719A2 (fr) * 1998-08-13 2000-02-16 Maschinenfabrik J. Dieffenbacher GmbH & Co. Procédé et extrudeuse de plastification pour produire des compositions polymères renforcées par des fibres
EP1211046A2 (fr) 2000-11-30 2002-06-05 Maschinenfabrik J. Dieffenbacher GmbH & Co. Procédé et dispositif pour la fabrication de compositions polymères renforcées de fibres
DE102007014694A1 (de) 2007-03-27 2008-10-09 Oskar Dilo Maschinenfabrik Kg Vorrichtung zum geführten Transport einer Faserflockenmatte
DE102007047548A1 (de) 2007-09-28 2009-04-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung zum Zuführen von kurzen Fasern
DE102012100637A1 (de) * 2011-01-26 2012-07-26 Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. Verfahren zur kontinuierlichen Dosierung von Stapelfasern an Schneckenmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHSZANIECKI G ET AL: "STC ERGAENZT MT INNOVATIVE TECHNOLOGIE FUER LANGFASERVERSTAERKTE THERMOPLASTE", KUNSTOFFE INTERNATIONAL, CARL HANSER VERLAG, MUNCHEN, DE, vol. 91, no. 12, 1 December 2001 (2001-12-01), pages 30 - 33, XP001110751, ISSN: 0023-5563 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104002454A (zh) * 2014-05-26 2014-08-27 安徽中意胶带有限责任公司 一种双面四层贴面整芯阻燃输送带面胶专用挤出机
US10011049B1 (en) 2017-07-24 2018-07-03 Aerlyte, Inc. Fiber-reinforced molding compounds and methods of forming and using the same
US10011048B1 (en) 2017-07-24 2018-07-03 Aerlyte, Inc. Fiber-reinforced molding compounds and methods of forming and using the same
US10576662B2 (en) 2017-07-24 2020-03-03 Aerlyte, Inc. Fiber-reinforced molding compounds and methods of forming and using the same

Similar Documents

Publication Publication Date Title
EP2536545B1 (fr) Procédé de fabrication de granulés en matériaux composites renforcés par des fibres
EP2695976B1 (fr) Dispositif pour délivrer des fibres divisées ou des bourres de fibres sur un dispositif de transport
EP2481551B1 (fr) Procédé de dosage continu de fibres à empiler sur des machines à vis sans fin
DE3280480T2 (de) Granulat aus faserverstärkten Verbundstoffen und deren Herstellungsverfahren
EP0258684B1 (fr) Procédé pour la fabrication d'une matière fibreuse entremêlée à partir de fibres de verre et de polymère en vue de fabriquer des objets conformés en matière plastique renforcée de fibres de verre, et appareil pour réaliser le procédé
DE2501941A1 (de) Vorrichtung zum mischen von viskosen stoffen mit feststoffen
EP3277473B1 (fr) Procédé pour produire un matériau composite fibreux
EP3288739B1 (fr) Procédé et dispositif de production d'un matériau composite en fibres
EP2181217B1 (fr) Procédé et dispositif pour la fabrication en continu d'une bande multiaxiale non tissée
EP3730275B1 (fr) Procédé de compoundage direct des compositions renforcées par des fibres pour la fabrication de pièces moulées en matière plastique et dispositif de compoundage direct
EP0566830B1 (fr) Procédé et installation pour la préparation d'une matière à mouler composite fibre/résine, en particulier d'un préimprégné
DE3507720C2 (de) Verfahren und Vorrichtung zum Herstellen eines Rohlings aus glasfaserverstärktem Kunststoff
EP1211046B1 (fr) Procédé et dispositif pour la fabrication de compositions polymères renforcées de fibres
DE1956038A1 (de) Verfahren und Vorrichtung zum Herstellen faserverstaerkter Platten oder Folien aus thermoplastischem Material und nach dem Verfahren hergestellte Platte oder Folie
EP3450603B1 (fr) Procédé de formation d'un non-tissé profilé
WO2014008917A1 (fr) Dispositif et procédé destinés au dosage continu de fibres discontinues sur des machines à vis sans fin
DE29909016U1 (de) Vliesanlage
EP2919960B1 (fr) Procédé d'amenage et assemblage en continu de structures fibreuses en forme de bandes ou rubans dans une machine à vis sans fin
DE1510391C3 (de) Verfahren und Anlage zur Herstellung von Asbestvliesen
DE102014106460A1 (de) Textilmaschine
EP3450604B1 (fr) Procédé de formation d'un produit non tissé, profilé, solidifié
DE102021104974B3 (de) Baugruppe einer Vorrichtung, Verfahren sowie Vorrichtung zur Herstellung einer Verbundvlieswarenbahn
DE2263324C3 (de) Vorrichtung zur kontinuierlichen Herstellung von faserverstärkten bandförmigen PreBmassen
DE4300269A1 (de) Verfahren zur Herstellung faserverstärkter Kunststoffe mit einer Matrix aus thermoplastischem Kunststoff und Vorrichtung zur Durchführung des Verfahrens
DE102014102079A1 (de) Faserbasierte Trägerstruktur für Flüssigkeiten und Feststoffpartikel

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12735509

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12735509

Country of ref document: EP

Kind code of ref document: A1