DE102011018422A1 - Braiding pultrusion process for continuous production of thermoplastic fiber-reinforced plastic (FRP) hollow section involves heating thermoplastic matrix material of sliding jacket to impregnate and consolidate in hollow section braid - Google Patents

Abstract

A multilayer hollow section braid (10) having several hybrid roving or fiber tapes is produced, by reinforcing fibers (2) and thermoplastic matrix material (3) on braiding mandrel (4) having braid wheels (21). The hollow section braid is fed into a consolidation tool (5). A sliding jacket covering hollow section braid is produced from matrix material. The matrix material of sliding jacket is heated up to a glass transition temperature for impregnating and consolidating hollow section braid with matrix material by tempering devices (8,8a-8c). An independent claim is included for braiding pultrusion system.

Description

The invention relates to a braided pultrusion process and a braided pultrusion plant for the continuous production of a thermoplastic FRP hollow profile.

Hybrid hollow sections are known from the prior art, which are produced by different methods and from different materials. Hybrid hollow sections are currently being produced by braiding pultrusion with thermoset systems. In a conventional pultrusion process for producing such plastic profile parts, a fiber bundle is impregnated with a thermosetting resin and pulled through a heated forming die having the desired profile, whereby the resin cures. In plastic profile parts produced in this way, the fibers run essentially in the longitudinal direction of the plastic profile parts, so that torsional or peel stresses occurring under a corresponding load can cause a breakage of the resin between parallel fibers.

Profiles in the form of fiber-reinforced thermosets such as epoxy and polyester reinforced glass or carbon fibers are particularly complex in terms of the time factor and therefore expensive to manufacture, also they are not deformable after manufacture and usable only for a relatively narrow limited application.

In the EP 0 402 309 A1 A simple and inexpensive process for the production of profile rods from continuous technical fibers in a thermoplastic matrix having an inner, unidirectional core and at least one enveloping sheath braid is described. The unidirectional core and the sheath braids are heated and then continuously formed together in a pultrusion device, wherein they are compactly consolidated under optimized pressure and partial cooling and pressed into the predetermined profile shape.

Another method for producing a fiber-reinforced plastic profile part, which is also not a hollow profile is in the DE 10 2008 010 228 A1 shown. The method comprises feeding and preforming a tubular fiber mesh which is wetted with a liquid or powdery resin film. The tubular fiber braid is flattened and formed to form the plastic profile part. In order to avoid fiber damage during production, the profile is arranged in sections in a heatable press after introduction of the matrix and partially cured with heat input. The tool used for this is in two parts and must always be opened to continue the profile.

For the production of high-strength and high-strength lightweight hollow sections made of fiber-reinforced thermoplastic, the winding technique (Filament Windig) is also known. Such hollow profiles are typically made of cross windings (about 45 °) with impregnated fibers on a cylindrical winding core.

The DE 10 2007 051 517 A1 presents the production of a hollow shaft made of fiber composite material with concave and convex profile areas. The radii of the rounded wave edges correspond to 5 to 10% of the mean wave radii. The hollow shaft is reinforced by an at least two-layer fiber braid of carbon, aramid, glass, and / or basalt fibers. The matrix material is a plastic or a metal or a ceramic.

The DE 10 2007 051 517 A1 focusses on the design of the profile design, wherein to avoid fiber damage, a flowing cross-sectional transition from the winding mandrel to the mandrel in the pultrusion tool, which predetermines the inner contour of the hollow shaft, is proposed.

Based on this prior art, it is an object of the present invention to provide a braided pultrusion process for the continuous production of a thermoplastic fiber composite plastic hollow profile, in which the frictional forces on the fibers, which occur during retraction of the fiber braid in a Pultrusionsformdüse or Einzugssmatrize further reduced. This improvement is to be ensured with respect to thermoplastic FRP hollow profiles with larger wall thicknesses.

This object is achieved by a method having the features of claim 1.

The object of the creation of a corresponding device is achieved by a Flechtpultrusionsanlage with the features of claim 7.

Further developments of the objects are carried out in the respective subclaims.

A first embodiment of the braiding pultrusion method relates to the continuous production of a thermoplastic FRP hollow profile in a braided pultrusion plant, wherein in a first step a multilayer hollow profile braid is produced from hybrid rovings. Depending on the requirement, the hollow profile can be designed rotationally symmetrical to the longitudinal axis of the pultrusion system or also asymmetrically. The hybrid rovings, which comprise reinforcing fibers of glass, carbon, aramid, ceramic and / or metal and thermoplastic matrix material, are provided by a Braiding device of the braided pultrusion system intertwined. For a multilayer hollow profiled braid, the braiding device comprises several braiding wheels, which make the braiding layers on a braiding mandrel.

The thermoplastic matrix material of the hybrid rovings may be present as fibers which are present in the rovings together with reinforcing fibers, but may also be rovings of hybrid yarns in which the reinforcing fibers are coated with a thermoplastic matrix size. Thus, even the hollow profile braid contains at least a portion of the matrix material, namely evenly distributed, which ensures a complete and uniform impregnation and consolidation of the hollow profile braid to the thermoplastic FRP hollow profile later in thicker wall thicknesses. Another option is the processing of preconsolidated semi-finished products, in particular fiber tapes, which consist of reinforcing fibers and thermoplastic matrix. The processing and application of the hybrid rovings is analogous to that of the hybrid rovings.

After the rotationally symmetrical, multilayer hollow profile mesh is produced, it is removed from the braiding mandrel and drawn through a feeder matrix into a consolidation tool of the braided pultrusion plant.

Optionally, the hollow profile braid can be mounted on a tool core, which is guided by the feeder matrix.

The retraction of the hollow profile mesh in the consolidation tool is done by a trigger device, which is connected downstream of the consolidation tool. According to the invention, to improve the sliding properties or to reduce the friction / coefficients of friction of the hollow profile mesh in the consolidation tool, a slip coating of the thermoplastic matrix material is produced around the hollow profile mesh, wherein the thermoplastic matrix material of the floating jacket is heated at least to a glass transition temperature of the thermoplastic matrix material, so that a deformability given the matrix material. Thus, especially with hollow profiles with large wall thicknesses, the stress on the fibers can be prevented by high frictional forces, which could otherwise lead to the fiber accumulation at the entrance of the consolidation tool, so that damage to the braid or the fibers is avoided. In the consolidation tool of the braided pultrusion plant, the hollow profile braid is impregnated with melted matrix material and subsequently consolidated, the respective zones of the consolidation tool being equipped with corresponding tempering devices. A first tempering device heats up in a impregnation zone to a melting temperature of the thermoplastic matrix plastic, so that the matrix fraction of the hybrid rovings melts and impregnates the surrounding reinforcing fibers. By means of further tempering devices which provide in particular for a successive cooling of the impregnated hollow profile braid, the hollow profile braid can be cooled faster and better due to the short flow paths.

In a particularly advantageous embodiment, the Gleitummantelung is formed by a melt of the thermoplastic matrix material, which has particularly good sliding properties or a high reduction in friction / friction results. To produce this melt sliding jacket additional molten matrix material can be supplied to the hollow profile braid at the entrance to the consolidation tool, in particular immediately after the draw-in die, which is followed by the impregnation zone.

An amount of the additional matrix material added to form the melt slippage sheath may also be selected according to the height of the matrix portion in the hybrid rovings and depending on a desired fiber content in the FRP hollow profile.

Furthermore, it is conceivable, alternatively or in addition to the melt sliding jacket, to heat the hollow profile braid before entry into the draw-in die of the consolidation tool at least up to the glass transition temperature, preferably to the flow temperature of the thermoplastic matrix material, so that the matrix material is present in the hollow profile braid in a flow region and the friction is reduced when pulling into the consolidation tool.

This heating of the hollow profile braiding prior to entry into the consolidation tool can be carried out successively by means of a heater connected downstream of each braiding wheel.

Although the leadership of the hollow profile braid by the consolidation tool without supporting tool core is conceivable, especially if it is thick-walled hollow profile braid, yet before pulling the hollow profile braid through the feeder die in the consolidation tool, the mounting of the hollow profile braid on a tool core part of the method.

To avoid air pockets for optimal consolidation of the thermoplastic FRP hollow profile, vibrations can be introduced into the tool core and the braiding material, which can be achieved by generating vibrations in the core Consolidation tool can be realized by means of a suitable device such as an ultrasound generator.

In the successive braiding of the layers by means of the serially arranged braiding wheels, braiding or bracing angles of each braiding wheel can be generated independently of each other, which lie in a range of ± 5 ° to ± 80 °. If desired, in particular for reinforcing the FRP hollow profile with the bending load to be expected, hybrid rovings can be integrated at a 0 ° angle as standing threads, which run in an elongated manner into the mesh and have virtually no undulation.

An embodiment according to the invention of a braided pultrusion plant which is suitable for producing a thermoplastic FRP hollow profile comprises a braiding device comprising at least two serially arranged braiding wheels and a consolidation tool with a retractable die and tempering devices for impregnating and consolidating the hollow profiled braid produced by the braiding device. In order to reduce the frictional forces on the fiber braid in the consolidation tool and thus to avoid fiber damage, the braided pultrusion plant has a device for producing a Gleitummantelung of the thermoplastic matrix material to the hollow profile braid, which means the thermoplastic matrix material of the Gleitummantelung at least up to a glass transition temperature of the thermoplastic Matrix material is heated.

This device for producing the sliding jacket may be an extruder device and an additional molten matrix material feeding device extending from the extruder device. The feed device can open into the entry of the hollow profile braid into the consolidation tool, in particular immediately after the feeder matrix.

Furthermore, the device for producing the Gleitummantelung at least in a heating device process upstream of the consolidation tool, which heater surrounds the hollow profile braid and / or rotates about the hollow profile braid. As heaters, for example, infrared emitters come into question.

The heaters can, for heating each layer of the multilayer hollow profile braid, each be followed by a braiding. The last heating device lies in front of the feeder matrix of the consolidation tool.

A vibration generating device may be provided as part of the consolidation tool to maintain the mesh during passage through the consolidation tool, i. H. to vibrate during impregnation and consolidation to prevent air pockets. For this purpose, the device for vibration generation can be coupled to the tool core. As a vibration device can come about as an ultrasonic transducer on the consolidation tool in question.

A thermoplastic FRP hollow profile manufactured using the method according to the invention or in the system according to the invention has less or no fiber damage due to the reduced friction when it is inserted into the tool; Furthermore, the production times are reduced by the continuous production. The thermoplastic FRP hollow sections produced in this way can also be reshaped.

These and other advantages are set forth by the following description with reference to the accompanying figures.

The reference to the figures in the description is to aid in the description and understanding of the subject matter. Articles or parts of objects which are substantially the same or similar may be given the same reference numerals. The figures are merely a schematic representation of an embodiment of the invention.

Showing:

1 a schematic side sectional view of a braided pultrusion plant,

2 two cross-sectional views through different hybrid rovings,

3 a cross-sectional view through another hybrid roving,

4 a cross-sectional view through another hybrid roving,

5 a schematic side sectional view of the braiding of the Flechtpultrusionsanlage from 1 .

6 a schematic sketch of braids with different braiding angles,

7 a schematic side sectional view of the consolidation tool of Flechtpultrusionsanlage 1 , without extruder,

8th a schematic side sectional view of the consolidation tool accordingly 1 with the feed line for the melt-sliding jacket,

9 an enlarged detail view of the white outlined area 8th the mouth of the feed line into the entrance of the hollow profile mesh in the consolidation tool,

10 a schematically illustrated process chain from the method according to the invention.

The invention relates to a continuous process for producing a FRP hollow profile, in particular a tube made of endless fiber-reinforced thermoplastic. This hollow profile is made by braiding pultrusion. The braiding material used is a hybrid roving or a towpreg made of a reinforcing fiber (eg carbon fiber) and a thermoplastic matrix (eg PPA). The problems of impregnation and consolidation in the thermoplastics due to their viscosity and the extremely high friction forces even with larger wall thicknesses are solved by the process. Large wall thicknesses of viscous thermoplastics are problematic due to the high frictional forces acting on the "dry" rovings.

These frictional forces and thus the risk of fiber damage are reduced in the pultrusion process according to the invention. Furthermore, the fiber accumulation in the pultrusion and the displacement of the braid are reduced. In addition, the fiber impregnation is made possible by short flow paths of the matrix to the reinforcing fiber by using finely distributed hybrid rovings and by a special pressure and temperature control of the melt.

By braided pultrusion, a fiber-reinforced thermoplastic hollow profile is produced.

One in front of the consolidation tool 5 the braided pultrusion plant 20 Positioned braiding produces a rotationally symmetric braid 10 which after braiding directly into the consolidation tool 5 runs and here to the hollow profile 11 is consolidated ( 1 ). The whole process from braiding to the finished hollow profile 11 is continuous throughout, it runs the mesh 10 after the braiding process directly without an intermediate step into the consolidation tool 5 the braided pultrusion plant 20 , At this pultrusion also a forming process can be connected.

In the braided pultrusion process according to the invention for producing a thermoplastic FRP hollow profile 11 in a braided pultrusion plant 20 , as in 1 to see, is first the rotationally symmetric multilayer hollow profile mesh 10 from the hybrid rovings 1 made, the reinforcing fibers 2 and thermoplastic matrix material 3 include.

For the production of the braid 10 becomes a very homogeneous hybrid roving 1 (please refer 2 and 3 ) used. This consists of a reinforcing fiber 2 , which may consist of glass, carbon, aramid, ceramic and / or metal (figuratively not representable) and a thermoplastic fiber 3 , about PPA. The advantage of the hybrid rovings is the matrix material already contained in the preform, so that the very fine, homogeneous distribution of the reinforcing and matrix fibers 2 . 3 the matrix material already in the braid before consolidation in the pultrusion process 10 located. This allows a faster and better consolidation due to short flow paths of the later hollow profile 11 , In addition, the fibers 2 . 3 parallel to the axis and increasing performance without twisting / knots arranged.

A second variant is the use of so-called towpregs or cores-impregnated rovings, of which a cross-section in 4 which are matrix-coated rovings made from a reinforcing fiber 2 and a thermoplastic matrix material 3 is.

The basis for the pultrusion is the braid 10 , which in the Flechtpultrusionsanlage 20 is consolidated. The multilayer braid 10 is through several successive braiding wheels 21 (please refer 1 and 5 ) generated. Thus, several layers can be braided one above the other, resulting in the production of profiles 11 with large wall thicknesses possible. In braiding, reinforcement angles ( 6 ) from about ± 5 ° to ± 80 °, for a gain in the 0 ° direction, which is particularly advantageous in bending stress, can be at the wicker 21 additional Stehfäden be supplied.

These run stretched in the network 10 and thus have virtually no ondulation. One speaks of the so-called UD lichen.

After the braiding process is the braid 10 from the wicker thorn 4 deducted and into the consolidation tool 5 the braided pultrusion plant 20 ( 1 and 7 ) and there via a die 6 through the consolidation tool 5 drawn. For pulling through is a trigger device 7 the consolidation tool 5 downstream. Optionally, the braid 10 before moving into the consolidation tool 5 on a tool thorn 25 be raised.

For hollow profiles with large wall thicknesses and dry reinforcing fibers are formed when moving through the die 6 high frictional forces, causing fiber retention at the beginning of the consolidation tool 5 the braided pultrusion plant can come what the braid 10 or the fibers 1 damaged. This is prevented or suppressed or reduced as follows:
As in 1 , and in more detail in 8th , is seen, will be an extruder 24 inserted through the feed line 24a additional melted matrix material into the consolidation tool 5 injects. In 9 is the area of the impregnation zone 8th in the consolidation tool 5 shown enlarged, at the entrance, immediately after the feeder matrix 6 , the feed line 24a for the additional matrix material 3a into the pultrusion channel of the consolidation tool 5 opens, through which the hollow profile braid 10 is pulled. Due to the additional matrix material 3a becomes a sliding film coating 3a around the hollow profile braid 10 in the tool 5 generated, whereby the sliding properties or the friction / friction of the braid 10 in the consolidation tool 5 be improved.

Another inventive approach to reduce the friction during retraction of the hollow profile mesh 10 into the consolidation tool 5 consists in the braiding prior to entry into the consolidation tool successively until softening or until melting of the thermoplastic matrix material 3 of the hollow profile mesh 10 to warm up. In 1 and 5 There are three infrared emitters 50 shown as heaters, each one a wicker 21 are downstream. That's how the braid gets 10 before moving into the pultrusion tool 5 by use of circulating infrared radiators 50 tempered. The last infrared radiator 50 is thus right in front of the consolidation tool 5 positioned. The braid 10 is thus heated until the matrix material 3 in the flow area and thereby the friction when pulling in the consolidation tool 5 is reduced, which ultimately reduces the load on the fibers and reduces the frictional forces, which also have an influence on the applied tensile forces.

The through the extraction device 7 , which provides the axial feed of the hollow profile braid and can be carried out, for example, as a double belt, the braided pultrusion plant 20 into the consolidation tool 5 retracted hollow profile braid 10 is impregnated and consolidated as it passes through the various temperature zones. They are made by different tempering devices 8th . 8a . 8b . 8c of the consolidation tool 5 heated or cooled. The first tempering device in the production flow direction 8th represents the heating device for the impregnation zone and tempered the impregnation zone to the melting or flow temperature of the thermoplastic matrix plastic.

As noted above, at this point, the additional matrix material is used to form the melt-slipping jacket 3a fed. In the subsequent tempering zones 8a . 8b . 8c that of the hotter impregnation zone 8th For example, may be thermally separated by a heat insulating, followed by a successive cooling stepwise consolidation, for example, in 30 ° C increments of 120 ° C above 90 ° C to 60 ° C, before the FRP hollow section 11 the consolidation tool 5 through the extraction device 7 leaves and then separated and / or can be reshaped.

By one on the consolidation tool 5 arranged ultrasound generator 23 , please refer 1 and 7 , can cause vibration in the tool core 25 and thus be introduced into the braided material, wherein the vibration of the clamping and the core 25 Air pockets can be avoided, which ultimately leads to optimal consolidation. Alternative vibration exciter to the ultrasound generator 23 are also possible.

During consolidation and fiber impregnation, the matrix becomes 3 distributed homogeneously avoiding cavities or air bubbles. This is influenced by the three process parameters heat, pressure and time. High temperatures increase the flowability, which is also required in the middle of the wall thickness. By pressure, the melt is forced between the fibers, which is partly done by capillary action. It is also cooled under pressure, which smoothes the surface and ensures dimensional stability. Due to the short flow path with finely distributed hybrid rovings 1 requires consolidation a small amount of time.

To the braid 10 To consolidate, a certain temperature must first be achieved. Subsequently, a cooling must take place. This is done by means of tempering 8th . 8a . 8b . 8c tempered consolidation tool 5 provided. To keep the time for consolidation as low as possible, the temperature of the hollow profile mesh 10 also be done inside. The tempering takes place here via the core or mandrel 25 which can heat or cool as needed. For cooling, the mandrel is provided in the interior with a line that brings a cooling medium such as nitrogen to the desired locations and then there provides the appropriate effect. Locally, the cooling can also be done by materials with different thermal conductivity.

The individual process steps described can be combined depending on the component and boundary conditions. So z. B. a profile with high wall thickness in several braiding processes with intermediate pultrusion processes, see 10 to be made. So it is only a thin mesh produced, this is pultruded, so impregnated and consolidated, and then over-woven again; then the procedure is repeated. So very large wall thicknesses can be achieved. It may be possible to dispense with the core after the first pultrusion process, since the profile is already dimensionally stable.

After each braiding process, the tubular braid layer can be heated by means of an IR radiator, which facilitates the insertion into the consolidation tool, since the matrix already melts and first adhesions between matrix and reinforcing fiber occur, which in turn stabilizes the braided tube and slipping or To avoid upsetting the braid in front of the pultrusion die helps.

This results from the inventive method advantageous that the post-forming of the thermoplastic FRP hollow section is possible. Furthermore, with reduced production times, a higher efficiency of mass production is achieved, and the production costs for the profiles according to the invention are lower than those for aluminum hollow profiles. Nevertheless, the FVK hollow profiles created in this way are torsionally rigid and rigid closed hollow profiles with the simultaneous use of materials with the highest lightweight construction quality. The manufacturing process is gentle on the fibers and therefore promotes quality.

The production process of straight and curved hollow profiles is safe and robust, yet variable and flexible with low tooling costs for different pipe dimensions; It even allows the production of finished parts in one process step.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0402309 A1 [0004]
• DE 102008010228 A1 [0005]
• DE 102007051517 A1 [0007, 0008]

Claims (10)

Flechtpultrusionsverfahren for the continuous production of a thermoplastic FRP hollow profile ( 11 ) in a braided pultrusion plant ( 20 ), comprising the steps of: - producing a multilayer hollow profile braid ( 10 ) from a multiplicity of hybrid rovings or fiber tapes, which reinforcing fibers ( 2 ) and thermoplastic matrix material ( 3 ), on a wicker thorn ( 4 ) by means of a braiding device, the at least two braiding wheels ( 21 ), - removing the hollow profile mesh ( 10 ) of the wicker thorn ( 4 ), - retraction of the hollow profile braid ( 10 ) by a feeder matrix ( 6 ) into a consolidation tool ( 5 ) of the braided pultrusion plant ( 20 ) by means of a consolidation tool ( 5 ) downstream extraction device ( 7 ), - producing a Gleitummantelung ( 3a ) of the thermoplastic matrix material around the hollow profile braid ( 10 ), wherein the thermoplastic matrix material of the Gleitummantelung ( 3a ) at least to a glass transition temperature of the thermoplastic matrix material ( 3 ), - Impregnating and consolidating the hollow profile mesh ( 10 ) with the matrix material ( 3 ) in the consolidation tool ( 5 ), the temperature control devices ( 8th . 8a . 8b . 8c ) having. A braiding pultrusion process according to claim 1, comprising the step of: - supplying molten matrix material ( 3a ) to the hollow profile braid ( 10 ) for producing the Gleitummantelung ( 3a ) at the entry into the consolidation tool ( 5 ), in particular immediately after the feeder matrix ( 6 ). A braiding pultrusion method according to claim 1 or 2, comprising the step of: - heating the hollow profile braid ( 10 ) for producing the Gleitummantelung ( 3a ) before entering the feeder matrix ( 6 ) of the consolidation tool ( 5 ) to at least the glass transition temperature of the thermoplastic matrix material ( 3 ), in particular to at least the flow temperature of the thermoplastic matrix material ( 3 ), so that the matrix material ( 3 ) in the hollow profile braid ( 10 ) is present in a flow region. A braid pultrusion process according to claim 3, wherein the heating of the hollow profile braid ( 10 ) successively by means of one each braiding wheel ( 21 ) and a consolidation tool ( 5 ) upstream heating device ( 50 ) he follows. A braiding pultrusion method according to at least one of claims 1 to 4, comprising at least one of the steps: - before retraction of the hollow profile braid ( 10 ) through the feeder matrix ( 6 ) into the consolidation tool ( 5 ) Mounting the hollow profile braid ( 10 ) on a tool core ( 25 ), - generating vibrations in the consolidation tool ( 5 ) and introducing the vibrations in the hollow profile braid ( 10 ) and / or the tool core ( 25 ). A braiding pultrusion method according to at least one of claims 1 to 5, comprising at least one of the steps: - producing the braided layers of the hollow-profile braid ( 10 ) with mutually independent braiding or reinforcement angle in a range of ± 5 ° to ± 80 °, and / or - stretched into the hollow profile braid ( 10 ) Hybrid rovings ( 1 ) at a 0 ° angle as standing threads. Flechtpultrusionsanlage ( 20 ) for producing a thermoplastic FRP hollow profile ( 11 ), comprising a braiding device of at least two serially arranged braiding wheels ( 21 ) and a consolidation tool ( 5 ) with a feeder matrix ( 6 ) and tempering devices ( 8th . 8a . 8b . 8c ) for impregnating and consolidating the hollow profile braid produced by the braiding device ( 10 ), characterized in that the braided pultrusion plant ( 20 ) a device for producing a Gleitummantelung ( 3a ) of the thermoplastic matrix material around the hollow profile braid ( 10 ), wherein by the device, the thermoplastic matrix material of the Gleitummantelung ( 3a ) at least up to a glass transition temperature of the thermoplastic matrix material ( 3 ) is heated. Flechtpultrusionsanlage ( 20 ) according to claim 7, characterized in that the means for producing the Gleitummantelung ( 3a ) an extruder device ( 24 ) and one from the extruder device ( 24 ) extending delivery device ( 24a ) for additional molten matrix material ( 3 ), wherein the feeding device ( 24 ) in the entrance of the hollow profile mesh ( 10 ) into the consolidation tool ( 5 ), in particular immediately after the withdrawal matrix ( 6 ). Flechtpultrusionsanlage ( 20 ) according to claim 7 or 8, characterized in that the device for producing the Gleitummantelung ( 3a ) at least one heater upstream of the consolidation tool ( 5 ) comprising a hollow profile braid ( 10 ) surrounding and / or around the hollow profile braid ( 10 ) rotary heating device, in particular an infrared radiator ( 50 ). Flechtpultrusionsanlage ( 20 ) according to claim 9, characterized in that each one Heating device to each braiding wheel ( 21 ) and the consolidation tool ( 5 ) is connected upstream.

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