A dual axle release cloth bearing device for pultrusion processes

Abstract

This utility model relates to a biaxial release cloth support device for pultrusion processes, comprising two sets of support columns, two sets of mounting brackets located inside the support columns, a first cylinder and a second cylinder located inside the mounting brackets, a release cloth coaxially arranged with the first cylinder and the second cylinder, a mold and a limiting plate located between the two sets of mounting brackets, and a base for supporting the two sets of support columns. By setting up a biaxial structure composed of the first cylinder and the second cylinder, the release cloth is fixed and tensioned during normal operation through a magnetic damper and an electric ejection structure, ensuring that the release cloth enters the mold in a taut and flat state during operation. When the release cloth is replaced, the old and new release cloths are fixed on the two support devices respectively. Through the magnetic damper, the old and new release cloths are kept taut throughout the replacement process, and smoothly enter the mold. This solves the problems of release cloth folding and changes in the distance between the release cloth edge and the product edge during release cloth replacement.

Description

Technical Field

[0001] This utility model relates to the technical field of release cloth support devices, and in particular to a biaxial release cloth support device for pultrusion processes. Background Technology

[0002] Pultrusion is an automated molding technology for the continuous manufacturing of fiber-reinforced composite profiles. Its core lies in the continuous pulling of resin-impregnated fiber bundles through a heated mold using a precisely controlled traction system to achieve curing and molding. Release cloths are frequently used in pultrusion production. The release cloth support device in the pultrusion process is a key auxiliary equipment in the composite material molding process. Its core function is to ensure the high-quality continuous production of resin-based composite profiles through physical isolation and process optimization.

[0003] Existing pultrusion process release cloth support devices usually require the release cloth to be replaced during continuous production. During this process, the release cloth needs to be removed and replaced. This causes the release cloth to move left and right and twist when it enters the mold in a free and relaxed state. This results in changes in the distance between the edge of the release cloth and the edge of the product, as well as folding of the release cloth. Consequently, the molded product cannot meet the requirements and the product quality cannot be guaranteed. Utility Model Content

[0004] The technical problem to be solved by this utility model is that existing release cloth support devices for pultrusion processes are prone to causing changes in the distance between the edge of the release cloth and the edge of the product and folding of the release cloth when the release cloth is disassembled and replaced, resulting in a decline in product quality.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A biaxial release cloth bearing device for pultrusion process includes two sets of support columns, two sets of mounting frames disposed inside the support columns, a first cylinder and a second cylinder disposed inside the mounting frames, a release cloth coaxially disposed with the first cylinder and the second cylinder, a mold and a limiting plate disposed between the two sets of mounting frames, and a base for supporting the two sets of support columns.

[0006] The beneficial effects of this utility model are as follows: By setting up a dual-axis structure composed of a first cylinder and a second cylinder, the release cloth is fixed and tensioned by a magnetic damper and an electric ejection structure during normal operation, ensuring that the release cloth enters the mold in a taut and flat state during operation. When the release cloth is replaced, the old and new release cloths are fixed on two bearing devices respectively. Through the magnetic damper, the old and new release cloths are kept taut throughout the replacement process, and enter the mold smoothly. This avoids the problem of the release cloth moving left and right when entering the mold due to the release cloth being in a free and relaxed state during unloading, replacement, and sewing, which causes changes in the edge distance between the release cloth and the product edge and folds in the release cloth.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the first cylinder and the second cylinder are arranged in parallel, and the release cloths on the first cylinder and the second cylinder are arranged side by side.

[0009] Furthermore, the mold is located above the limiting plate, and the two sides of the mold are fixedly connected to the inner side of the support column through connecting columns.

[0010] Furthermore, the limiting plate is fixedly connected to the front end of the support column, and the surface of the limiting plate is provided with limiting holes that match the release cloth.

[0011] Furthermore, the outer diameters of the first and second cylinders are smaller than the inner diameter of the release cloth paper tube, and they integrate a pneumatic telescopic module.

[0012] Furthermore, the magnetic damper has a circular metal shell, and a permanent magnet and a magnetic rotor are built into the magnetic damper.

[0013] Furthermore, the magnetic damper is located downstream of the release fabric path and applies resistance to the two release fabrics simultaneously, with the two sets of mounting brackets arranged in parallel.

[0014] Furthermore, a reinforcing strip is fixedly connected to the lower end of the mounting bracket. Both the mounting bracket and the reinforcing strip are detachably connected to the support column by bolts. Mounting holes are provided around the four corners of the base.

[0015] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting a magnetic damper to apply a speed-adaptive eddy current damping force to the release fabric, and by forcing the release fabric into the mold in a straight line through the limiting plate, the risk of lateral deviation can be eliminated, the tension is precise and constant, and pleating and deviation are prevented. The first cylinder and the second cylinder are integrated with a pneumatic telescopic module, and the new fabric is simultaneously tightened at the moment the old fabric is cut, which greatly shortens the roll changing time. The dual-axis independent control allows the new and old fabrics to be pulled synchronously during the sewing stage, avoiding production interruption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the operating structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the mold structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the release fabric structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the magnetic damper structure of this utility model.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. First cylinder; 2. Second cylinder; 3. Magnetic damper; 4. Mounting bracket; 5. Release cloth; 6. Mold; 7. Limiting plate; 8. Limiting hole; 9. Support column; 10. Base; 11. Reinforcing strip; 12. Connecting column. Detailed Implementation

[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0024] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0025] Release cloth is an auxiliary material used in composite material molding processes. It is usually made of high-temperature resistant, low-adhesion fiber fabric (such as polyester, nylon, glass fiber, or aramid) and its surface is specially treated (such as silicone coating or fluoropolymer treatment) to give it good release properties.

[0026] 2. Core Role

[0027] In composite material manufacturing (such as pultrusion, compression molding, vacuum infusion, etc.), the main functions of release fabric include:

[0028] (1) Isolation and demolding

[0029] Prevents adhesion: It is laid between the mold and the composite material to prevent the resin from directly adhering to the mold surface after curing, thus simplifying the demolding process.

[0030] Protecting molds: Reduce mold wear and extend service life, which is especially important for high-precision metal molds or silicone soft molds.

[0031] (2) Surface quality control

[0032] Texture transfer: The microstructure of the release fabric surface (such as plain weave or twill weave) can be replicated to the surface of the composite material to form a specific roughness, which facilitates subsequent spraying or bonding.

[0033] Reduce porosity: In the vacuum extrusion process, the release cloth can guide air bubbles out, reducing the porosity of the finished product.

[0034] (3) Process assistance

[0035] Absorb excess resin: Some release fabrics (such as porous ones) can absorb resin overflow, reducing the amount of cleaning work.

[0036] Continuous production support: In the pultrusion process, the release fabric moves synchronously with the product to achieve continuous demolding (such as the application of the dual bearing load device in the document).

[0037] Industry application examples

[0038] Wind turbine blades: A porous release cloth is used in vacuum injection to ensure that the carbon fiber layup is free of air bubbles.

[0039] Automotive parts: Polyester release fabric is used during compression molding to achieve a high-gloss surface.

[0040] Sports equipment: Continuous release fabric in the pultrusion process ensures the mass production of carbon fiber fishing rods or arrow shafts.

[0041] The release cloth support device for pultrusion process is an auxiliary device specifically used in the pultrusion molding process of composite materials. It is mainly used to support, position and transport the release cloth (a high-temperature resistant fabric coated with release agent to prevent the composite material from sticking to the mold during the molding process), ensuring that the release cloth can stably and continuously adhere to the inner wall of the mold or the surface of the composite material, and work with the pultrusion equipment to complete the continuous molding of the profile.

[0042] effect:

[0043] Stable load-bearing and conveying of release fabric

[0044] Release cloth is usually in roll form. The carrier device fixes the release cloth roll with structures such as rollers and guide rollers, and releases the release cloth synchronously with the traction speed of the profile during the pultrusion process, ensuring that it enters the mold evenly and without wrinkles, and avoiding molding defects caused by cloth looseness or displacement.

[0045] Precise positioning of release fabric

[0046] The device controls the laying position and angle of the release cloth through an adjustable guiding mechanism (such as a limit roller or an angle adjuster) to ensure that it completely covers the areas inside the mold that need to be prevented from sticking (such as the inner wall of the cavity and the forming surface), thereby improving the demolding effect and reducing the risk of scratches or adhesion on the profile surface.

[0047] Adapting to pultrusion process continuity

[0048] The core of the pultrusion process is "continuous molding". The supporting device needs to match the running speed of the pultrusion equipment (such as traction machine and mold) to realize the synchronous conveying and cutting of the release fabric (some devices integrate automatic cutting function), ensuring that the production process is not interrupted and improving production efficiency.

[0049] Protecting the performance of release fabric

[0050] The contact parts of the device (such as rollers) are usually made of smooth, wear-resistant materials (such as chrome-plated steel and polytetrafluoroethylene) to avoid damage to the coating or fabric structure of the release cloth due to friction or compression, and to ensure that its release performance is stable.

[0051] Further explanation:

[0052] In the pultrusion process, release fabric is a key auxiliary material for ensuring the surface quality of composite materials (such as fiberglass profiles) and the life of the mold, while the support device is the "bridge" that enables the release fabric to function. Its design needs to be adapted according to the width, thickness, and material of the release fabric, as well as the cross-sectional shape of the pultruded profile (such as square tubes, round tubes, and special profiles), and it is an important auxiliary equipment for achieving efficient and high-quality pultrusion production.

[0053] like Figures 1-5 As shown, a biaxial release cloth support device for pultrusion process includes two sets of support columns 9, two sets of mounting frames 4 disposed inside the support columns 9, a first cylinder 1 and a second cylinder 2 disposed inside the mounting frames 4, a release cloth 5 coaxially disposed with the first cylinder 1 and the second cylinder 2, a mold 6 and a limiting plate 7 disposed between the two sets of mounting frames 4, and a base 10 for supporting the two sets of support columns 9.

[0054] like Figures 2-3 As shown, the first cylinder 1 and the second cylinder 2 are arranged in parallel, and the demolding cloths 5 on the first cylinder 1 and the second cylinder 2 are arranged side by side. The mold 6 is located above the limiting plate 7. The two sides of the mold 6 are fixedly connected to the inner side of the support column 9 through the connecting column 12. The limiting plate 7 is fixedly connected to the front end of the support column 9. The surface of the limiting plate 7 is provided with limiting holes 8 that match the demolding cloth 5.

[0055] like Figures 4-5 As shown, the outer diameter of the first cylinder 1 and the second cylinder 2 is smaller than the inner diameter of the paper tube of the release cloth 5 and the internal pneumatic telescopic module is integrated. The outer shell of the magnetic damper 3 is a circular metal shell. The magnetic damper 3 has a built-in permanent magnet and a magnetic rotor. The magnetic damper 3 is located downstream of the path of the release cloth 5 and applies resistance to the two release cloths 5 simultaneously. The two sets of mounting brackets 4 are arranged in parallel. The lower end of the mounting bracket 4 is fixedly connected to a reinforcing strip 11. The mounting bracket 4 and the reinforcing strip 11 are detachably connected to the support column 9 by bolts. The four corners of the base 10 are provided with mounting holes.

[0056] Working principle:

[0057] First, insert the new release cloth 5 paper tube into the first cylinder 1. The pneumatic telescopic module inside the cylinder expands radially and locks the inner wall of the paper tube.

[0058] The release cloth 5 leads out through the limiting hole 8 of the limiting plate 7 to ensure no twisting.

[0059] Then, it runs normally:

[0060] The release cloth 5 is guided downstream by the magnetic damper 3, and the rotor is pulled by the cloth to rotate and cut the magnetic lines of force, generating constant resistance to maintain the taut state.

[0061] The taut release cloth 5 smoothly enters the mold cavity 6.

[0062] Next, replace the release cloth 5:

[0063] The new roll is loaded into the second cylinder 2 and tightened, and the end of the new fabric is sewn to the old fabric.

[0064] When the suture segment is pulled through the magnetic damper 3, the damping force automatically adapts to the speed difference between the two fabrics to prevent loosening.

[0065] After the sewing point enters the mold 6, the old fabric is cut off, and the new fabric is continuously released by the second cylinder 2.

[0066] Finally, reset standby:

[0067] Remove the empty drum from the first cylinder 1, and the cylinder will retract and reset.

[0068] The rotor of magnetic damper 3 stops rotating, and the resistance returns to zero.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A biaxial release cloth carrying device for use in a pultrusion process, characterized by, It includes two sets of support columns (9), two sets of mounting brackets (4) located inside the support columns (9), a first cylinder (1) and a second cylinder (2) located inside the mounting brackets (4), a release cloth (5) coaxially arranged with the first cylinder (1) and the second cylinder (2), a mold (6) and a limiting plate (7) located between the two sets of mounting brackets (4), and a base (10) for supporting the two sets of support columns (9).

2. A dual axis release cloth bearing device for use in a pultrusion process as defined in claim 1, wherein, The first cylinder (1) and the second cylinder (2) are arranged in parallel, and the release cloth (5) on the first cylinder (1) and the second cylinder (2) are arranged side by side.

3. A dual axis release cloth bearing device for use in a pultrusion process as defined in claim 1, wherein, The mold (6) is located above the limiting plate (7), and the two sides of the mold (6) are fixedly connected to the inner side of the support column (9) through the connecting column (12).

4. A dual axis release cloth bearing device for use in a pultrusion process as defined in claim 1, wherein, The limiting plate (7) is fixedly connected to the front end of the support column (9), and the surface of the limiting plate (7) is provided with limiting holes (8) that match the release cloth (5).

5. A dual axis release cloth bearing device for use in a pultrusion process as defined in claim 1, wherein, The outer diameter of the first cylinder (1) and the second cylinder (2) is smaller than the inner diameter of the paper tube of the release cloth (5) and the internal pneumatic telescopic module is integrated.

6. The biaxial release fabric support device for pultrusion process according to claim 1, characterized in that, The outer shell of the magnetic damper (3) is a circular metal shell, and the magnetic damper (3) contains a permanent magnet and a magnetic rotor.

7. A dual axis release cloth bearing device for use in a pultrusion process as defined in claim 1, wherein, The magnetic damper (3) is located downstream of the release cloth (5) path and applies resistance to the two release cloths (5) simultaneously. The two sets of mounting brackets (4) are set in parallel.

8. A dual axis release cloth bearing device for use in a pultrusion process as defined in claim 1, wherein, The lower end of the mounting bracket (4) is fixedly connected to a reinforcing strip (11). Both the mounting bracket (4) and the reinforcing strip (11) are detachably connected to the support column (9) by bolts. The four corners of the base (10) are provided with mounting holes.

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