CN116160700A - Pultrusion equipment for fiber reinforced resin profile - Google Patents

Abstract

The invention provides a pultrusion molding equipment for fiber reinforced resin profiles. The pultrusion molding equipment includes: a pultrusion die, and the pultrusion mold is used to apply heat to the dipped fiber, so as to solidify and shape the dipped fiber into a fiber reinforced resin profile , the pultrusion die includes at least two heating sections; an extrusion assembly, the extrusion assembly is located between the at least two heating sections, and the extrusion assembly is provided with lines; wherein, the extrusion assembly is used to apply to the preformed fiber reinforced resin profile pressure to print the texture on at least part of the surface of the fiber reinforced resin profile. The pultrusion molding equipment provided by the present invention can realize the surface treatment of fiber-reinforced resin profiles during the continuous pultrusion process, increase the surface roughness of fiber-reinforced resin profiles, reduce the use of auxiliary materials, reduce processing procedures, and improve production efficiency , and reduce production costs.

Description

A kind of pultrusion molding equipment of fiber-reinforced resin profiles

technical field

The invention relates to the technical field of processing and manufacturing fiber-reinforced resin profiles, in particular to a pultrusion molding equipment for fiber-reinforced resin profiles.

Background technique

Fiber-reinforced resin profiles have broad application prospects in many fields such as rail transit, building materials, and home decoration. For example, the sleepers used in the former railway lines were mainly prestressed reinforced concrete sleepers and wooden sleepers. But high-quality hard wood is needed to make wooden sleepers, and high-quality wood resources are limited, which is not conducive to the sustainability of the ecological environment. Simultaneously, in order to prolong the service life for the corrosion resistance of wooden sleepers, chemical preservatives are used in the production process of wooden sleepers, which will also bring hidden dangers to the environment and the health of workers. In view of the defects of commonly used prestressed reinforced concrete sleepers and wooden sleepers, and the continuous development of composite material technology. Fiber-reinforced resin composites are a good alternative. Fiber-reinforced resin composites have a structure similar to natural wood, are not perishable, and have excellent performance. They can be used as rail transit facilities and building decoration materials to replace wood. Pultrusion molding is one of the molding methods of thermosetting fiber-reinforced resin profiles. It is simple and efficient, and is suitable for the production of profiles with constant cross-sectional shapes. For fiber-reinforced resin profiles, in some application scenarios, the surface of the fiber-reinforced resin profiles needs to have a certain roughness. In the related art, post-processing such as grinding is generally used to increase the surface roughness of the fiber reinforced resin profile. The existing technical problems are: the process is cumbersome and the processing efficiency is low.

Contents of the invention

The problem solved by the invention is how to improve the surface roughness of the fiber-reinforced resin profile with a simple and efficient process.

In order to solve the above problems, the present invention provides a pultrusion molding equipment for fiber-reinforced resin profiles. The pultrusion molding equipment includes: a pultrusion die, the pultrusion die is used to apply heat to the dipped fibers to solidify the dipped fibers into a fiber reinforced resin profile, the pultrusion die includes at least two heating sections; The pressing assembly is located between at least two heating sections, and the extrusion assembly is provided with textures; wherein, the extrusion assembly is used to apply pressure to the preformed fiber-reinforced resin profile, so as to print the texture on at least part of the surface of the fiber-reinforced resin profile .

In any of the above technical solutions, the at least two heating sections include a preheating section, a curing section and a release section arranged in sequence; wherein, the extrusion assembly is located between the preheating section and the curing section.

In any of the above technical solutions, at least two heating sections include a preheating section, a curing section, and a release section arranged in sequence; wherein, the extruding assembly is located between the curing section and the release section.

In any of the above technical solutions, the extruded assembly includes: a first extruded part, which is arranged on either side of the fiber-reinforced resin profile; a second extruded part, which is arranged on the fiber-reinforced resin profile; The opposite side of either side of the resin profile; wherein at least one of the first extrusion and the second extrusion is textured.

In any of the above technical solutions, the extrusion assembly includes: a first crawler, the first crawler is arranged on the upper side of the fiber-reinforced resin profile; a second crawler, the second crawler is arranged on the lower side of the fiber-reinforced resin profile; wherein, the first At least one of the first track and the second track is provided with textures, the first track rolls counterclockwise, and the second track rolls clockwise.

In any of the above technical solutions, the extruding assembly includes: a first roller, the first roller is arranged on the upper side of the fiber-reinforced resin profile; a second roller, and the second roller is arranged on the lower side of the fiber-reinforced resin profile; wherein, the first At least one of the first roller and the second roller is provided with textures, the first roller rolls counterclockwise, and the second roller rolls clockwise.

In any of the above technical solutions, the extruding assembly includes: a first reciprocating mechanism, the first reciprocating mechanism is arranged on the upper side of the fiber-reinforced resin profile; wherein, the first reciprocating mechanism moves downward to approach the fiber-reinforced resin profile, and applying pressure to the fiber-reinforced resin profile, the first reciprocating mechanism moves upward to move away from the fiber-reinforced resin profile.

In any of the above technical solutions, the extrusion assembly further includes: a second reciprocating mechanism, the second reciprocating mechanism is arranged on the lower side of the fiber-reinforced resin profile; wherein, the second reciprocating mechanism moves upwards to approach the fiber-reinforced resin profile, and apply pressure to the fiber-reinforced resin profile, and the two reciprocating mechanisms move downward to keep away from the fiber-reinforced resin profile.

In any of the above technical solutions, the texture is at least one of the following or a combination thereof: striped texture, dot-shaped texture, polygonal texture.

In any of the above technical solutions, the pultrusion molding equipment further includes: a pressure sensor, which is arranged on the extrusion component and used to detect the pressure exerted by the extrusion component on the fiber reinforced resin profile.

In the above technical solution, the pultrusion molding equipment further includes: a fiber guide assembly arranged adjacent to the pultrusion die; wherein the fiber guide assembly is used to guide and send the dipped fiber into the pultrusion die.

In any of the above technical solutions, the pultrusion molding equipment further includes: a profile pulling assembly, the profile pulling assembly is arranged at the end of the pultrusion die away from the fiber guiding assembly; wherein, the profile pulling assembly is used to pull the fiber-reinforced resin profile away from the pultrusion die .

In any of the above technical solutions, the pultrusion molding equipment further includes: a sawing assembly, which is arranged at the end of the profile traction assembly away from the pultrusion die; wherein, the sawing assembly is used to saw the fiber-reinforced resin type .

Beneficial effect

The pultrusion molding equipment provided by the present invention can realize the surface treatment of the fiber-reinforced resin profiles during the continuous pultrusion process, increase the surface roughness of the fiber-reinforced resin profiles, and thus can omit the later grinding treatment. In addition, the present invention can also avoid the generation of dust due to grinding and improve the working environment. Finally, the invention also avoids the use of release cloths. Finally, the pultrusion molding equipment provided by the present invention can improve the surface roughness of pultrusion products without grinding and without using release cloth, reduce the use of auxiliary materials, reduce processing procedures, improve production efficiency, and reduce Cost of production.

Description of drawings

Fig. 1 is the structural representation of the pultrusion molding equipment of fiber-reinforced resin profiles in the related art;

Fig. 2 is the structural representation of the pultrusion molding equipment of the fiber-reinforced resin profile of the present invention;

Fig. 3 is one of the texture schematic diagrams of the extrusion assembly of the present invention;

Fig. 4 is the second schematic diagram of the texture of the extruded assembly of the present invention;

Fig. 5 is a schematic diagram of the appearance of a fiber-reinforced resin profile in the related art;

Fig. 6 is a schematic view of the appearance of a fiber-reinforced resin profile obtained by the pultrusion molding equipment of the present invention.

Explanation of reference numerals among Fig. 1 and Fig. 5:

Pultrusion equipment: 100'; Pultrusion die: 110'; Preheating section: 111'; Curing section: 112'; Release section: 113'; Cut components: 150'; fiber reinforced resin profiles: 200'.

Explanation of reference numerals among Fig. 2-4 and Fig. 6:

Pultrusion molding equipment: 100; pultrusion die: 110; preheating section: 111; curing section: 112; release section: 113; extrusion components: 120; first extrusion: 121; second extrusion: 122; fiber guide assembly: 130; profile pulling assembly: 140; sawing assembly: 150; pressure sensor: 160; fiber reinforced resin profile: 200.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the typical pultrusion process used by the pultrusion equipment 100' in the related art is mainly composed of processes such as yarn feeding, dipping, preforming, curing molding, pulling and cutting, and the process flow is generally as follows: The fibers (yarn bundles) are drawn out from the placing frame, and enter the glue tank for dipping through clustering, and then are drawn into the preforming mold by the fiber guide assembly 130', extrude excess resin and remove air bubbles during the compaction process, and then enter the drawing Extrusion die 110', whereby the fibers with resin are solidified in the pultrusion die 110', then pulled out by the profile pulling assembly 140', and finally cut into fiber-reinforced resin profiles of required length by the sawing assembly 150' 200'.

In order to make the fiber-reinforced resin profile 200' have a high-quality surface and the required physical and chemical properties, so as to meet the basic requirements for continuous production at a certain pulling rate, based on the characteristics of the resin curing process, the pultrusion molding equipment 100' in the related art Generally, the heating temperature of the pultrusion die 110' is divided into three sections: a preheating section 111', a curing section 112' and a release section 113'.

After the resin-impregnated fiber enters the preheating section 111' of the pultrusion die 110', the resin is homogenized under the action of temperature, so that the subsequent curing is more complete. At the same time, the fiber impregnated with resin generates hydraulic pressure due to thermal expansion, making it close to the surface of the cavity of the pultrusion die 110', so that the surface roughness of the fiber reinforced resin profile 200' is reduced.

After passing through the preheating section 111' and entering the curing section 112', the fiber resin is rapidly solidified at this heating temperature into a profile with certain mechanical properties. Then, after entering the release section 113', different degrees of volume shrinkage occur during curing exotherm, so that the fiber-reinforced resin profile 200' is separated from the mold surface, the friction force is reduced, and the mold is ejected under the action of the profile traction assembly 140'.

Therefore, as shown in FIG. 5 , in the related art, the surface of the pultruded fiber-reinforced resin profile 200' is flat and smooth, which cannot meet the requirements of high surface roughness and irregularity. Especially for plates with interlayer bonding, in order to improve interlayer bonding performance, it is necessary to roughen the surface or introduce auxiliary materials on the surface of the fiber-reinforced resin profile 200' during the molding process before pouring or bonding. For example, the release cloth is coated on the surface of the fiber-reinforced resin profile 200', and after the material is peeled off, it can form textures of a certain shape on the surface of the plate to increase the roughness of the surface. For another example, for boards with anti-slip requirements, it is generally necessary to paint the surface and spread some small-sized stone particles to increase the surface roughness to achieve the purpose of anti-slip. However, the above methods all additionally increase the product application process and cost.

Therefore, in order to increase the application space of products produced by the pultrusion process and reduce costs, combined with the technical characteristics of the pultrusion process and the inventor's technical experience, the present invention provides a pultrusion device 100 for fiber-reinforced resin profiles.

As shown in FIG. 2 , the pultrusion molding equipment 100 includes: a fiber guide assembly 130 , a pultrusion die 110 , a profile pulling assembly 140 and a sawing assembly 150 .

Wherein, the fiber guide assembly 130 may specifically include a constant tension creel and a yarn guiding device, which are used to guide and send the dipped fiber into the pultrusion die 110 . Specifically, taking glass fiber yarn as a reinforcing fiber as an example, the glass fiber yarn can be pulled out from the constant tension fiber creel, and the yarn bundle can be pulled to the entrance of the pultrusion die 110 through the yarn guiding device.

It can be understood that before the fibers are guided into the pultrusion die 110, they need to be immersed in resin for impregnation treatment. The fibers in this embodiment can be glass fibers, textile fibers, or other fibers. The types and formulations of the resins in this embodiment can be selected and adjusted by those skilled in the art according to actual needs.

The fiber guide assembly 130 is disposed adjacent to the pultrusion die 110 for applying heat to the dipped fibers to solidify and shape the dipped fibers into a fiber reinforced resin profile. The pultrusion die 110 can be fixed by means of mechanical connection, or can be set separately.

Pultrusion die 110 In order to achieve the above-mentioned purpose of thermoforming, the pultrusion die 110 includes at least two heating sections. Exemplarily, at least two heating sections include a preheating section 111 , a curing section 112 and a release section 113 arranged in sequence. Wherein, the pultrusion die 110 may be a segmented structure. For example, the preheating section 111 is separated from the curing section 112 and the release section 113 , or the release section 113 is separated from the preheating section 111 and the curing section 112 . It can also be a separate preheating section 111 , or a separate preheating section 111 and curing section 112 . It is also possible to configure the curing section 112 as a separate thermosetting box or thermosetting oven.

The profile pulling assembly 140 is located at the end of the pultrusion die 120 away from the fiber guiding assembly 130 , and the profile pulling assembly 140 is used to pull the fiber reinforced resin profile away from the pultrusion die 110 . The profile pulling assembly 140 can adjust the speed of pultrusion.

The sawing assembly 150 is arranged at the end of the profile traction assembly 140 away from the pultrusion die 110, and the sawing assembly 150 is used for sawing the fiber-reinforced resin type into segments, and finally obtains the fiber-reinforced resin profile 200 as shown on the right side of FIG. 2 finished product. Exemplarily, the sawing assembly 150 may include a cutter head, which drives the cutter head to move up and down by reciprocating up and down, so as to complete segmental sawing of the fiber-reinforced resin profiles.

Exemplarily, the preparation method of the fiber-reinforced synthetic sleeper in this embodiment specifically includes the following steps: S1, guide the yarn, introduce the fiber into the injection box; S2, impregnate, inject the resin matrix into the injection box, so that the fiber is Impregnation in the resin matrix; S3, forming treatment, extruding, pulling, cooling and cutting the resin matrix with fibers distributed inside and/or on the surface to obtain fiber-reinforced resin profiles.

Wherein, the yarn guiding in step S1 refers to guiding at least one type of fiber into the injection box 1 through the yarn guiding device. The fiber can be any one or several fiber rovings of 1000tex to 9000tex, and can also be expanded into ply yarn. The yarn guide device effectively improves the uniformity of fiber distribution in the resin and improves the uniformity of product performance. The impregnation in step S2 refers to mixing the resin matrix evenly and pouring it into the injection box, so that the fiber material is impregnated in the resin matrix. The resin matrix may be a two-component foamed polyurethane comprising a mixture of isocyanate and polyol. The molding process in step S3 refers to sending the resin matrix (assembly) with fibers to the pultrusion die 110 for extrusion molding and curing through the feeding device. The curing temperature range can be 100°C to 220°C to complete the curing molding process Finally, the product is pulled to the outside of the pultrusion die 110 by the profile pulling assembly 140 for cooling and cutting. The fibers in the above steps may be at least one of continuous reinforcing fibers and/or fiber fabrics 3 . The material of the continuous reinforcing fiber is selected from any one or combination of glass fiber, carbon fiber, aramid fiber and ultra-high molecular weight polyethylene fiber. The fiber fabric is any one or a combination of woven fabrics, non-woven fabrics, and three-dimensional fabrics.

An extrusion assembly 120 is disposed in the pultrusion die 110, and the extrusion assembly 120 is located between at least two heating sections. Preferably, the extrusion assembly 120 is located between the preheating section 111 and the curing section 112 . The extruded component 120 is provided with textures, which may be intaglio or embossed.

It can be understood that, in the present invention, the extrusion component 120 is used to apply pressure to the preformed fiber-reinforced resin profile, so as to print the texture on at least part of the surface of the fiber-reinforced resin profile.

Specifically, the extrusion assembly 120 can be a hydraulic structure or a pneumatic mechanism. The extrusion assembly 120 realizes the extrusion movement to the surface of the preheated fiber-reinforced resin profile under the action of pressure, and the concave-convex structure of the surface is under the action of pressure. Textures are formed on the surface of fiber-reinforced resin profiles. The extrusion component 120 can be made of metal material, ceramic material, glass, polymer material and so on.

Exemplarily, the texture may be at least one of the following textures or a combination thereof: striped textures, dot-shaped textures, and polygonal textures. Striped textures include straight striped textures or water rippled textures. The multiple stripes can be parallel to each other or cross each other. The dot-shaped texture includes dot-shaped texture, or circular texture, or elliptical texture. Polygonal textures include rhombus textures, or triangular textures, or rectangular textures, or polygonal textures with more than pentagons.

In one example, as shown in FIG. 3 , the texture may be a plurality of raised dots or convex hull-shaped textures arranged in a matrix order. In another example, as shown in FIG. 4 , the texture may be a plurality of striped textures arranged at intervals. In yet another example, the texture may be any irregularly shaped texture that is arranged randomly.

The molding method adopted in the present invention is to pass the fiber impregnated with resin (hereinafter referred to as "combination") first through the preheating section 111 of the pultrusion die 110. Component 120 enables the treatment of its surface. The surface of the extrusion component 120 is imprinted with textures of a certain shape and size. The fiber-reinforced resin profile after the pattern printing is further solidified and formed through the curing section 112 of the pultrusion die 110 , and pulled out under the action of the profile pulling assembly 140 to obtain a fiber-reinforced resin profile with texture on the surface.

The extrusion assembly 120 includes: a first extrusion 121, the first extrusion 121 is arranged on either side of the fiber reinforced resin profile; a second extrusion 122, the second extrusion 122 is arranged on the opposite side of the fiber reinforced resin profile On the other side of either side; wherein, at least one of the first extruded part 121 and the second extruded part 122 is provided with lines, and any one of the first extruded part 121 and the second extruded part 122 One scrolls clockwise, and the other scrolls counterclockwise.

In one example, as shown in FIG. 2 , the first extruded part 121 and the second extruded part 122 are crawlers respectively. Specifically, the extrusion assembly 120 includes: a first track, the first track is set on the upper side of the fiber reinforced resin profile; a second track, the second track is set on the lower side of the fiber reinforced resin profile; wherein, the first track and At least one of the second crawlers is provided with a pattern, the first crawler rolls counterclockwise, and the second crawler rolls clockwise.

In another example, the first extruded part 121 and the second extruded part 122 are rollers, respectively. Specifically, the extruding assembly 120 includes: a first roller, the first roller is arranged on the upper side of the fiber reinforced resin profile; a second roller, the second roller is arranged on the lower side of the fiber reinforced resin profile; wherein, the first roller and At least one of the second rollers is provided with textures, the first roller rolls counterclockwise, and the second roller rolls clockwise. The roller has a specific cylindrical or cylindrical structure, and the upper and lower rollers roll separately to print patterns on the preheated and softened fiber-reinforced resin profiles between the two.

The first extruded part 121 and the second extruded part 122 run synchronously with the pultruded fiber-reinforced resin profile at the same speed, thereby printing continuous or discontinuous patterns on the surface of the fiber-reinforced resin profile.

In yet another example, the extrusion assembly 120 includes: a reciprocating movement mechanism. The reciprocating mechanism can reciprocate under the driving action of a motor or other power components. The reciprocating mechanism is arranged on either side of the fiber-reinforced resin profile and is provided with textures. Wherein, the reciprocating mechanism moves along the target direction to approach the fiber-reinforced resin profile and apply pressure to the fiber-reinforced resin profile, and the reciprocating mechanism moves in the opposite direction of the target direction to move away from the fiber-reinforced resin profile.

For example, there may be one reciprocating mechanism, which is arranged above the fiber-reinforced resin profile and can move up and down in the longitudinal direction. The lower part of the reciprocating mechanism is provided with a textured printed board. After the reciprocating mechanism moves down, the textured printed board prints patterns on the upper surface of the fiber reinforced resin profile, and when the reciprocating mechanism moves up, it lifts and leaves the fiber reinforced resin profile. .

In one example, the extrusion assembly 120 includes: a first reciprocating mechanism, the first reciprocating mechanism is arranged on the upper side of the fiber-reinforced resin profile; wherein, the first reciprocating mechanism moves downward to approach the fiber-reinforced resin profile, And applying pressure to the fiber-reinforced resin profile, the first reciprocating mechanism moves upward to be away from the fiber-reinforced resin profile. In addition, the extruding assembly 120 also includes: a second reciprocating mechanism, the second reciprocating mechanism is arranged on the lower side of the fiber-reinforced resin profile; wherein, the second reciprocating mechanism moves upwards to approach the fiber-reinforced resin profile, and toward the fiber The reinforced resin profile applies pressure, and the two reciprocating mechanisms move downward, away from the fiber reinforced resin profile.

In addition, the pultrusion molding equipment 100 further includes a pressure sensor 160 , the pressure sensor 160 is disposed on the extruding assembly 120 and is used to detect the pressure applied by the extruding assembly 120 to the fiber-reinforced resin profile. Specifically, the number of pressure sensors 160 may be one or more, and the pressure sensors 160 are communicatively connected with the controller of the pultrusion equipment 100, so as to transmit the detected electrical signal for reflecting the degree of pressure to the controller. Thus, the controller adjusts the extrusion force of the extrusion assembly 120 according to the degree of pressure, so as to adjust the texture depth of the profile surface.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims (10)

1. A pultrusion apparatus (100) of a fiber reinforced resin profile, characterized in that the pultrusion apparatus (100) comprises:

a pultrusion die (110), the pultrusion die (110) being configured to apply heat to the dip fibers to cure the dip fibers into the fiber reinforced resin profile, the pultrusion die (110) comprising at least two heating sections;

a pressing assembly (120), wherein the pressing assembly (120) is positioned between the at least two heating sections, and the pressing assembly (120) is provided with grains;

wherein the extrusion assembly (120) is configured to apply pressure to the preformed fiber-reinforced resin profile to print the texture onto at least a portion of the surface of the fiber-reinforced resin profile.

2. The pultrusion apparatus (100) according to claim 1, characterized in that the at least two heating sections comprise a preheating section (111), a curing section (112) and a release section (113) arranged in sequence; wherein the extrusion assembly (120) is located between the preheating section (111) and the curing section (112).

3. The pultrusion apparatus (100) according to claim 1, characterized in that the at least two heating sections comprise a preheating section (111), a curing section (112) and a release section (113) arranged in sequence; wherein the extrusion assembly (120) is located between the curing section (112) and the release section (113).

4. A pultrusion apparatus (100) according to any of claims 1-3, characterized in that the extrusion assembly (120) comprises:

a first extrusion (121), the first extrusion (121) being provided on either side of the fiber reinforced resin profile;

a second extrusion (122), the second extrusion (122) being provided on the other side of the fiber-reinforced resin profile with respect to either side;

wherein at least one of the first pressing member (121) and the second pressing member (122) is provided with the grain.

5. A pultrusion apparatus (100) according to any of claims 1-3, characterized in that the extrusion assembly (120) comprises:

the first crawler belt is arranged on the upper side of the fiber reinforced resin section bar;

the second caterpillar band is arranged on the lower side of the fiber reinforced resin profile;

wherein at least one of the first track and the second track is provided with the texture, the first track rolls counterclockwise, and the second track rolls clockwise.

6. A pultrusion apparatus (100) according to any of claims 1-3, characterized in that the extrusion assembly (120) comprises:

the first roller is arranged on the upper side of the fiber reinforced resin section bar;

the second roller is arranged on the lower side of the fiber reinforced resin section bar;

wherein at least one of the first roller and the second roller is provided with the texture, the first roller rolls counterclockwise, and the second roller rolls clockwise.

7. A pultrusion apparatus (100) according to any of claims 1-3, characterized in that the extrusion assembly (120) comprises:

the first reciprocating mechanism is arranged on the upper side of the fiber reinforced resin section bar;

wherein the first reciprocating mechanism moves downward to be close to the fiber reinforced resin profile and applies pressure to the fiber reinforced resin profile, and moves upward to be away from the fiber reinforced resin profile.

8. The pultrusion apparatus (100) of claim 7, wherein the extrusion assembly (120) further comprises:

the second reciprocating mechanism is arranged on the lower side of the fiber reinforced resin section;

wherein the second reciprocating mechanism moves upward to be close to the fiber reinforced resin profile and applies pressure to the fiber reinforced resin profile, and moves downward to be away from the fiber reinforced resin profile.

9. A pultrusion apparatus (100) according to any of claims 1-3, characterized in that the texture is at least one of the following or a combination thereof:

bar-shaped lines, dot-shaped lines, polygonal lines.

10. A pultrusion apparatus (100) according to any of claims 1-3, characterized in that the pultrusion apparatus (100) further comprises:

and the pressure sensor (160) is arranged on the extrusion assembly (120) and is used for detecting the pressure applied by the extrusion assembly (120) to the fiber reinforced resin profile.

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