Clamping device capable of realizing production of thin-wall composite pultrusion product

Abstract

The invention relates to the technical field of composite material pultrusion, in particular to a clamping device capable of achieving thin-wall composite material pultrusion product production, which comprises a clamping device A, a clamping device B and electromagnetic devices, pultrusion products are horizontally arranged in the clamping device A and the clamping device B and located at the top of the electromagnetic device, and inner supporting cushion blocks are arranged in the clamping device A and the clamping device B and located in the pultrusion products; the electromagnetic device comprises a shell, and electrified coils are horizontally arranged at the top in the shell at equal intervals; by additionally arranging a magnetic suction cushion block clamping structure and adopting an electromagnetic suction adsorption clamping mode, the adaptability to use of different types of profiles is improved, the size can be adjusted at any time according to the actual required size, the use flexibility is improved, the effects of slipping and cracking of the clamping position are greatly improved, and therefore the use effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of composite material pultrusion, and in particular to a clamping device capable of realizing the production of thin-wall composite material pultrusion products. Background Art

[0002] The composite material pultrusion process is to pull the reinforcing fiber material (such as glass fiber, carbon fiber, etc.) impregnated with a resin matrix (such as epoxy resin, unsaturated polyester resin, etc.) through a molding die through a traction device, and the resin is solidified and formed in the mold, thereby producing a composite material profile with a fixed cross-sectional shape. According to the current development of pultruded composites, more and more special-shaped profiles such as window frames, frames, automotive profiles, pipes, and building material profiles are entering the pultrusion field. Most of these profiles have the characteristics of large cavities and thin walls. Considering the difficulty of the pultrusion process, it is often necessary to compromise by increasing the wall thickness and designing support columns inside the cavity. This will not only cause problems such as excess performance of composite products, weakening the lightweight advantage, and increasing costs, but also limit the development of the composite industry;

[0003] Usually, composite products with thin walls and large cavities will crack when the clamping force is 2-3 tons, and when the clamping force is large but not cracked, the surface of the product has already deformed significantly, which will inevitably lead to slippage and immobility of the product. If the product is not immediately processed to allow it to be pulled forward normally, it will cause mold blockage due to long parking time in a short period of time. Such products require a traction force of about 1.5-3 tons based on the differences in material system, performance requirements, cross-sectional shape, and cross-sectional size. Especially when dealing with unexpected situations, the required traction force may increase by about 1 ton;

[0004] To solve the above problems, the extended version of the form-fitting clamping tooling is to increase the contact area between the clamping and the product to increase the friction. Take the square tube product with an outer size of 120*120mm and a wall thickness of 2.0mm as an example. After the extended version of the form-fitting tooling is pressed down, the four sides of the product are tightly attached to the polyurethane skin, and the contact length is increased to 1.7 meters, while the original equipment clamping is only 1 meter long, and can only rely on the friction provided by the upper and lower surfaces to drive the product;

[0005] At present, the extended version of the form-fitting clamping device has the following main disadvantages: high production cost; limited scope of use; long production cycle; high production difficulty; and general anti-slip and anti-cracking effects. The production cost of this type of clamping device is about 3,000-5,000 yuan depending on the shape and size. One set of form-fitting clamping tooling can only be used for products with one cross-section, and each time the mold is changed, the clamping tooling needs to be replaced. Its weight and volume are large, resulting in a waste of time and labor costs. Moreover, this type of clamping tooling takes at least 15 days from the confirmation of the drawing to the completion of the production. It is also necessary to accurately control the degree of deformation of the polyurethane skin during the clamping and pressing process, so that it just fits the surface of the product but does not exceed the limit pressure that the product can withstand. After confirming the size, It cannot be modified any more. Composite products with thin walls and large cavities will have concave surface deformation when the clamping force is small. The role of conformal clamping cannot be achieved at this time. Even if the clamping force is reduced to no deformation of the product surface, the traction provided by all friction is far from meeting the demand, and slipping will still occur. Increasing the clamping force will only make the deformation more serious until cracking. Therefore, a clamping device that can realize the production of thin-walled composite pultruded products is proposed, so as to increase the clamping structure of the magnetic pad block. The electromagnetic suction clamping method is used to improve the adaptability to the use of different types of profiles. The size can be adjusted at any time according to the actual required size, which increases the flexibility of use and greatly improves the effects of slipping and cracking at the clamping position, thereby improving the use effect. Summary of the invention

[0006] In response to the problems in the prior art, the present invention provides a clamping device that can realize the production of thin-walled composite pultruded products, so as to facilitate the electromagnetic adsorption clamping method, improve the adaptability to the use of different types of profiles, and can adjust the size at any time according to the actual required size, thereby improving the use effect.

[0007] The technical solution adopted by the present invention to solve its technical problem is a clamping device capable of realizing the production of thin-walled composite pultruded products, comprising a clamping device A, a clamping device B and an electromagnetic device, wherein the clamping device A and the clamping device B are both horizontally provided with an electromagnetic device, and the clamping device A and the clamping device B are both horizontally provided with pultruded products at the top of the electromagnetic device, and the clamping device A and the clamping device B are provided with internal support pads located inside the pultruded products;

[0008] The electromagnetic device comprises a shell, wherein energized coils are horizontally and equidistantly arranged at the top of the shell, and an electric wire is arranged at one end of the shell, and the electric wire is electrically connected to the energized coils.

[0009] By adopting the above technical scheme, the shell, the electric coil and the electric wire can form an electromagnetic device. The use of electromagnetic suction pads to clamp can better solve the problem of slipping and cracking of the pultruded product at the clamping position of the traction machine. The ultimate clamping force that the product can withstand can be ignored, and the traction force can be continuously increased until it is sufficient. Not only is the processability better, but high-speed pultrusion can also be achieved, thereby improving product yield and output ratio and reducing production costs.

[0010] The electromagnetic device can select a strong magnetic component, which includes a hard shell, an electromagnet, and a strong magnetic component + an inner support pad. The principle and effect are the same, but there are safety hazards when using the strong magnet component, and protective measures need to be taken.

[0011] Specifically, the inner support pad includes a pad, an iron sheet corresponding to the electromagnetic device is arranged at the bottom of the pad, and polytetrafluoroethylene tape is pasted on the periphery of the pad and the iron sheet.

[0012] By adopting the above technical scheme, the pads, iron sheets and polytetrafluoroethylene tapes can form an internal support pad. In the process of pultrusion and clamping of the composite material, the clamping force of the pultruded product can be withstood to prevent it from large deformation and cracking, and the surface of the pultruded product can be tightly fitted with the polyurethane skin to ensure that it provides sufficient friction to pull the product.

[0013] Specifically, the clamping device A includes a first sliding frame, the top of the first sliding frame is connected to the first mounting frame by bolts, the top of the first mounting frame is connected to the first clamping hydraulic cylinder by bolts, the output end of the first clamping hydraulic cylinder is located at the bottom of the first mounting frame and is connected to the first pressure plate by bolts, the bottom of the first pressure plate in the first sliding frame is connected to the first support plate by bolts, and the first support plate is connected to the shell by bolts.

[0014] By adopting the above technical solution, the first sliding frame, the first mounting frame, the first clamping hydraulic cylinder, the first pressing plate and the first supporting plate can form a first clamping mechanism to press down, clamp and position the pultruded product.

[0015] Specifically, the clamping device B includes a second sliding frame, the top of the second sliding frame is connected to the second mounting frame by bolts, the top of the second mounting frame is connected to the second clamping hydraulic cylinder by bolts, the output end of the second clamping hydraulic cylinder is located at the bottom of the second mounting frame and is connected to the second pressure plate by bolts, the bottom of the second pressure plate in the second sliding frame is connected to the second support plate by bolts, and the second support plate is connected to the shell by bolts.

[0016] By adopting the above technical solution, the second sliding frame, the second mounting frame, the second clamping hydraulic cylinder, the second pressing plate and the second supporting plate can form a second clamping mechanism to press down, clamp and position the pultruded product.

[0017] Specifically, the bottoms of the first pressing plate and the second pressing plate and the surface of the top of the shell are all connected with polyurethane skin by gluing.

[0018] By adopting the above technical solution, the polyurethane skin can fit tightly with the surface of the pultruded product, providing sufficient friction, thereby converting sufficient traction to drive the pultruded product forward.

[0019] Specifically, the shell is made of polyethylene material.

[0020] By adopting the above technical solution, the quality and hardness of the electromagnetic device shell can be improved, and the service life can be extended.

[0021] Beneficial effects of the present invention:

[0022] The clamping device described in the present invention can realize the production of thin-walled composite pultruded products. Through the magnetic pad clamping tooling structure, the problem of slipping and cracking of pultruded products at the clamping position of the traction machine can be better solved. The ultimate clamping force that the pultruded product can withstand can be ignored, and the traction force can be continuously improved until sufficient. The processability and practicality are better, and high-speed pultrusion processing can be realized, the product yield and output ratio can be improved, and the production cost can be reduced. Moreover, the main components of the device are between about 600 and 800 yuan, the auxiliary parts are about 100 yuan, and a set of devices is less than 1,000 yuan. The main components are universal parts and do not need to be repeatedly replaced or customized according to different sizes. The production and installation of the device only take 3-4 days, and the size adjustment only needs to use polytetrafluoroethylene tape to stick the auxiliary parts on site, which is more suitable for actual production scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the clamping device A of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the clamping device B of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the electromagnetic device of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the strong magnetic component of the present invention;

[0029] Figure 6 It is a schematic diagram of the cross-sectional structure of the inner support pad of the present invention;

[0030] In the figure: 1. Clamping device A; 101. First sliding frame; 102. First mounting frame; 103. First clamping hydraulic cylinder; 104. First pressure plate; 105. First support plate; 2. Clamping device B; 201. Second sliding frame; 202. Second mounting frame; 203. Second clamping hydraulic cylinder; 204. Second pressure plate; 205. Second support plate; 3. Electromagnetic device; 301. Shell; 302. Power-carrying coil; 303. Electric wire; 4. Pultruded product; 5. Inner support pad; 501. Pad; 502. Iron sheet; 503. Teflon tape; 6. Polyurethane skin. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] In order to facilitate the electromagnetic adsorption clamping method and improve the adaptability to different types of profiles, the size can be adjusted at any time according to the actual required size, thereby improving the use effect, such as Figure 1-4 As shown, a clamping device capable of realizing the production of thin-wall composite pultruded products according to the present invention comprises a clamping device A1, a clamping device B2 and an electromagnetic device 3, wherein the electromagnetic device 3 is horizontally arranged in the clamping device A1 and the clamping device B2, a pultruded product 4 is horizontally arranged on the top of the electromagnetic device 3 in the clamping device A1 and the clamping device B2, and an inner support pad 5 is arranged in the pultruded product 4 in the clamping device A1 and the clamping device B2;

[0033] The electromagnetic device 3 includes a housing 301 , wherein energized coils 302 are horizontally and equidistantly arranged at the top of the housing 301 , and an electric wire 303 is arranged at one end of the housing 301 , and the electric wire 303 is electrically connected to the energized coils 302 .

[0034] When in use, the electromagnetic device 3 can be formed by the shell 301, the electric coil 302 and the wire 303. The use of electromagnetic suction pads to clamp can better solve the problem of slipping and cracking of the pultruded product 4 at the clamping position of the traction machine. The ultimate clamping force that the product can withstand can be ignored, and the traction force can be continuously increased until it is sufficient. Not only is the processability better, but high-speed pultrusion can also be achieved, thereby improving product yield and output ratio and reducing production costs.

[0035] The electromagnetic device 3 can select a strong magnetic component, which includes a hard shell and a strong magnet. The strong magnetic component + inner support pad 5 has the same principle and effect, but there are safety hazards when using the strong magnet component, and protective measures need to be taken.

[0036] In order to prevent the product from being deformed and cracked, for example, Figure 2 , Figure 6As shown, the present invention also includes that the inner support block 5 includes a pad 501, the bottom of the pad 501 is provided with an iron sheet 502 corresponding to the electromagnetic device 3, and the periphery of the pad 501 and the iron sheet 502 is adhered with a polytetrafluoroethylene tape 503.

[0037] When in use, the inner support pad 5 can be formed by the pad 501, the iron sheet 502 and the polytetrafluoroethylene tape 503. In the process of pultrusion and clamping of the composite material, the clamping force of the pultruded product 4 is withstood to prevent it from large deformation and cracking, and the surface of the pultruded product 4 is tightly fitted with the polyurethane skin 6 to ensure that it provides sufficient friction to pull the product.

[0038] For example, Figure 2 As shown, the present invention also includes that the clamping device A1 includes a first sliding frame 101, the top of the first sliding frame 101 is connected to the first mounting frame 102 by bolts, the top of the first mounting frame 102 is connected to the first clamping hydraulic cylinder 103 by bolts, the output end of the first clamping hydraulic cylinder 103 is located at the bottom of the first mounting frame 102 and is connected to the first pressure plate 104 by bolts, the bottom of the first pressure plate 104 in the first sliding frame 102 is connected to the first support plate 105 by bolts, and the first support plate 105 is connected to the shell 301 by bolts.

[0039] When in use, the first sliding frame 101 , the first mounting frame 102 , the first clamping hydraulic cylinder 103 , the first pressing plate 104 and the first supporting plate 105 can form a first clamping mechanism to press down, clamp and position the pultruded product 4 .

[0040] For example, Figure 3 As shown, the present invention also includes that the clamping device B2 includes a second sliding frame 201, the top of the second sliding frame 201 is connected to the second mounting frame 202 by bolts, the top of the second mounting frame 202 is connected to the second clamping hydraulic cylinder 203 by bolts, the output end of the second clamping hydraulic cylinder 203 is located at the bottom of the second mounting frame 202 and is connected to the second pressure plate 204 by bolts, the second sliding frame 202 is located at the bottom of the second pressure plate 204 and is connected to the second support plate 205 by bolts, and the second support plate 205 is connected to the shell 301 by bolts.

[0041] When in use, the second sliding frame 201 , the second mounting frame 202 , the second clamping hydraulic cylinder 203 , the second pressing plate 204 and the second supporting plate 205 can form a second clamping mechanism to press down, clamp and position the pultruded product 4 .

[0042] For example, Figure 2 , Figure 3As shown, the present invention also includes that the bottom of the first pressing plate 104, the second pressing plate 204 and the surface of the top of the shell 301 are all connected with a polyurethane skin 6 by gluing.

[0043] When in use, the polyurethane skin 6 can fit tightly with the surface of the pultruded product 4, providing sufficient friction, thereby converting sufficient traction to drive the pultruded product 4 to be pulled forward.

[0044] For example, Figure 4 As shown, the present invention also includes that the shell 301 is made of polyethylene material.

[0045] When in use, the polyethylene material can be used to improve the quality and hardness of the shell 301 of the electromagnetic device 3 and also help to extend the service life.

[0046] When the present invention is in use, the electromagnetic device 3 is placed under the polyurethane skin 6 of the traction machine clamping device A1 and the clamping device B2, and the inner support pad 5 is inserted into the cavity of the pultruded product 4. When the composite material pultrusion production line is running, the first pressing plate 104 of the clamping device A1 is clamped and pressed down to the surface of the pultruded product 4 under the drive of the first clamping hydraulic cylinder 103, and the electromagnetic device 3 at the clamping position of the clamping device B2 is energized synchronously with the clamping and pressing of the clamping device A1, and the magnetic force generated by the energized coil 302 attracts the clamping device B2 to clamp the inner support pad 5 inside the pultruded product 4. The iron sheet 502 ensures that the inner support pad 5 at the clamping position of the clamping device B2 is always kept at the corresponding clamping position, and the traction machine of the clamping device A1 is reset and the clamping is raised, and the traction machine of the clamping device B2 is pultruding and clamping and pressing down. At this time, the electromagnetic device 3 at the clamping position of the clamping device B2 is powered off, and the electromagnetic device 3 at the clamping position of the clamping device A1 is powered on synchronously with the clamping and pressing down of the clamping device B2, and the inner support pad 5 inside the pultruded product 4 of the clamping device A1 is adsorbed to ensure that the inner support pad 5 at the clamping position of the clamping device A1 is always kept at the corresponding clamping position;

[0047] In this way, the pultruded product 4 at the pressing position can be clamped, and there is always an internal support pad 5 inside the pultruded product 4. The internal support pad 5 resists the clamping force of the first pressing plate 104 and the second pressing plate 204 inside the pultruded product 4 to prevent it from being deformed and cracked, and makes the surface of the pultruded product 4 fit tightly with the polyurethane skin 6 to ensure that it provides sufficient friction to pull the product;

[0048] In the actual use process, it has the following advantages: low production cost, wide range of applications, short production cycle, low production difficulty, and significant effect in solving the problem of slipping and cracking of products in the clamping position; the magnetic pad clamping structure (electromagnetic device 3 / strong magnetic component) is about 600-800 yuan, the auxiliary parts (inner support pad 5) are about 100 yuan, and a set of equipment is less than 1,000 yuan. In addition, the main components are universal parts, which do not need to be replaced repeatedly or customized according to different sizes. The production cost is low, which greatly reduces the cost of different production needs. Moreover, the main component of the magnetic pad clamping is a universal part, which can be applied to all different types of profiles. The inner support pad can adjust the pad size at any time according to the required size. The modification is simple, the cost is extremely low, the speed is extremely fast and convenient; the initial production and installation of the magnetic adsorption clamping main component only requires The production time is only 2-3 hours, and the production time is 3-4 days, and it is applicable to all products once and for all. Later, only the inner support pad needs to be made, and the production time of the inner support pad only needs 2-3 hours. The main component is a universal part, which has nothing to do with the specifications and dimensions of the product. The inner support pad can be adjusted according to the actual size of the product and pasted with polytetrafluoroethylene tape. After the composite material product with thin wall thickness and large cavity enters the clamping, there is no need to consider the clamping force that the product can withstand. Therefore, the clamping force of the equipment can be greatly improved, so that the polyurethane skin 6 fits tightly with the surface of the pultruded product 4, providing sufficient friction, thereby converting sufficient traction to drive the pultruded product 4 to be pulled forward, while avoiding the two problems of slipping and product cracking, greatly improving the yield rate, and within the range allowed by the curing temperature, the pultrusion speed can be greatly increased (that is, the output ratio is increased), reducing production costs.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A clamping device capable of producing thin-wall composite pultruded products, characterized in that: The invention comprises a clamping device A (1), a clamping device B (2) and an electromagnetic device (3), wherein the electromagnetic device (3) is horizontally arranged in the clamping device A (1) and the clamping device B (2), a pultruded product (4) is horizontally arranged on the top of the electromagnetic device (3) in the clamping device A (1) and the clamping device B (2), and an internal support pad (5) is arranged in the pultruded product (4) in the clamping device A (1) and the clamping device B (2); The electromagnetic device (3) comprises a shell (301), wherein energized coils (302) are arranged horizontally and equidistantly at the top of the shell (301), and an electric wire (303) is arranged at one end of the shell (301), and the electric wire (303) is electrically connected to the energized coils (302).

2. A clamping device capable of producing thin-wall composite pultruded products according to claim 1, characterized in that: The inner support pad (5) comprises a cushion wood (501), an iron sheet (502) corresponding to the electromagnetic device (3) is arranged at the bottom of the cushion wood (501), and polytetrafluoroethylene tape (503) is adhered to the periphery of the cushion wood (501) and the iron sheet (502).

3. A clamping device capable of producing thin-wall composite pultruded products according to claim 2, characterized in that: The clamping device A (1) comprises a first sliding frame (101), the top of the first sliding frame (101) is connected to a first mounting frame (102) by bolts, the top of the first mounting frame (102) is connected to a first clamping hydraulic cylinder (103) by bolts, the output end of the first clamping hydraulic cylinder (103) is located at the bottom of the first mounting frame (102) and is connected to a first pressure plate (104) by bolts, the bottom of the first pressure plate (104) in the first sliding frame (102) is connected to a first support plate (105) by bolts, and the first support plate (105) is connected to a housing (301) by bolts.

4. A clamping device capable of producing thin-wall composite pultruded products according to claim 3, characterized in that: The clamping device B (2) comprises a second sliding frame (201), the top of the second sliding frame (201) is connected to the second mounting frame (202) by bolts, the top of the second mounting frame (202) is connected to the second clamping hydraulic cylinder (203) by bolts, the output end of the second clamping hydraulic cylinder (203) is located at the bottom of the second mounting frame (202) and is connected to the second pressure plate (204) by bolts, the bottom of the second pressure plate (204) in the second sliding frame (202) is connected to the second support plate (205) by bolts, and the second support plate (205) is connected to the housing (301) by bolts.

5. A clamping device capable of producing thin-wall composite pultruded products according to claim 4, characterized in that: The bottoms of the first pressing plate (104), the second pressing plate (204) and the top surfaces of the shell (301) are all connected with a polyurethane skin (6) by gluing.

6. A clamping device capable of producing thin-wall composite pultruded products according to claim 5, characterized in that: The shell (301) is made of polyethylene material.

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