Surface laminating combined device for pultrusion product

Abstract

The invention relates to a surface film covering combined device for pultrusion products. The surface film covering combined device comprises a pultrusion mold, a plasma treatment device, a gluing mechanism, a PVC film rolling forming mechanism, a drying oven and a traction device which are sequentially arranged. The plasma treatment device is used for carrying out plasma treatment on the surface of the formed pultrusion product; the gluing mechanism is used for gluing the pultrusion product of the plasma treatment arc; the PVC film rolling forming mechanism is used for attaching PVC films to the upper side and the lower side of the pultrusion product coated with the glue, and then rolling forming is conducted; the plasma processing device comprises a rack, a first plasma gun head and a second plasma gun head are arranged on the rack, the pultrusion product can penetrate through the first plasma gun head and the second plasma gun head, and plasma processing is conducted on the upper side and the lower side of the pultrusion product through the first plasma gun head and the second plasma gun head respectively. According to the method, the PVC film is adhered to the surface of the pultrusion product on line, so that the technological process is simplified, and the structural toughness of the pultrusion product is improved.

Description

Technical Field

[0001] This application relates to the field of pultruded carbon fiber products technology, and in particular to a surface coating assembly for pultruded products. Background Technology

[0002] For pultruded carbon fiber products, the product performance can be improved by coating the surface with a PVC film. Patent publication number CN211334911U indicates that the PVC coating can provide the composite material with a certain degree of structural toughness and extend its service life. Patent publication number CN116330711A describes the use of plasma activation treatment, enabling the pultruded sheets to be produced without a release cloth, and resulting in products with superior mechanical properties and higher resin bonding strength.

[0003] In the existing technology, there is no device for applying plasma surface treatment to the surface of PVC film during the pultrusion process, which cannot improve the structural toughness of pultruded products, resulting in poor stability and durability of the film.

[0004] Therefore, we propose a surface coating assembly for pultruded products. Summary of the Invention

[0005] In response to the shortcomings of the existing production technology, the applicant provides a surface coating assembly for pultruded products, which simplifies the process and improves the structural toughness of pultruded products by bonding PVC film to the surface of the pultruded products online.

[0006] The technical solution adopted in this application is as follows: A surface coating assembly for pultruded products, comprising the following components arranged sequentially: Pultrusion dies are used to form pultruded products; Plasma treatment equipment is used to perform plasma treatment on the surface of formed pultruded products; The adhesive coating mechanism is used to apply adhesive to pultruded products with plasma-treated arcs. A PVC film roll forming mechanism is used to attach PVC film to the top and bottom sides of pultruded products after gluing, and then roll form them. Drying oven, used for baking and curing pultruded products after roll forming; Traction device, used to pull cured pultruded products; The plasma treatment device includes a frame with a first plasma gun head and a second plasma gun head. The pultruded product can pass through the first plasma gun head and the second plasma gun head, and the upper and lower sides of the pultruded product are plasma treated by the first plasma gun head and the second plasma gun head, respectively.

[0007] Its further features are: The heights of the first and second plasma gun heads are adjustable.

[0008] The first plasma gun head and the second plasma gun head are staggered.

[0009] The pultrusion die produces pultruded products with a width of 20mm and a thickness of 5mm. The plasma treatment device uses a first plasma gun head and a second plasma gun head with a diameter of 30mm.

[0010] The first and second plasma gun heads are adjusted to be 5mm-10mm away from the center of the pultruded product.

[0011] The adhesive used in the coating mechanism is a two-component epoxy adhesive, and the oven temperature is set to 80℃.

[0012] The pultrusion die produces pultruded products with a width of 100mm and a thickness of 10mm. The plasma treatment device uses a first plasma gun head and a second plasma gun head with a diameter of 50mm.

[0013] The first and second plasma gun heads are adjusted to be 5mm-10mm away from the center of the pultruded product.

[0014] The stand is also equipped with a sweeping device, which enables the first and second plasma gun heads to process the entire width of the pultruded product.

[0015] The adhesive used in the coating mechanism is acrylic AB adhesive, and the oven temperature is set to 60℃.

[0016] The beneficial effects of this application are as follows: This application features a compact and rational structure, and is easy to operate. By bonding a PVC film to the surface of pultruded products online, the process is simplified and the structural toughness of the pultruded products is improved. Furthermore, a plasma treatment device is introduced before coating to improve the interfacial properties between the structural adhesive and the surface of the pultruded product, thereby enhancing the stability and durability of the adhesive film. Attached Figure Description

[0017] Figure 1 This is a flowchart of the combined unit section of this application.

[0018] Figure 2 This is a plan view of the combined device of this application.

[0019] Figure 3 This is a schematic diagram of the plasma processing apparatus of this application.

[0020] The components include: 1. Pultrusion die; 2. Plasma treatment device; 3. Glue coating mechanism; 4. PVC film roll forming mechanism; 5. Drying oven; 6. Traction device; 201. Stand; 202. First plasma nozzle; 203. Second plasma nozzle. Detailed Implementation

[0021] The specific embodiments of this application are described below with reference to the accompanying drawings.

[0022] A surface coating assembly for pultruded products includes a pultrusion die 1, a plasma treatment device 2, an adhesive coating mechanism 3, a PVC film roll forming mechanism 4, an oven 5, and a traction device 6.

[0023] The pultrusion die 1, plasma treatment device 2, glue coating mechanism 3, PVC film roll forming mechanism 4, drying oven 5, and traction device 6 are arranged in sequence.

[0024] Pultrusion die 1 is used to form pultruded products. After the pultruded products are formed and removed from pultrusion die 1, they first pass through plasma treatment device 2. The plasma treatment device 2 performs plasma treatment on the surface of the pultruded products to improve their adhesion. Then, adhesive is applied to the surface of the pultruded products by adhesive coating mechanism 3. Next, PVC film roll forming mechanism 4 pulls out the PVC film rolls placed on the upper and lower sides of the pultruded products and attaches them to the adhesive parts on the outside of the pultruded products, so that the PVC film and the pultruded products move in the same direction and at the same speed. Then, pressure rollers roll the adhesive parts of the PVC film and the pultruded products to ensure that the adhesive is evenly distributed on the inside and that the PVC film is flat and evenly adhered to the surface of the pultruded products. Finally, the pultruded products are baked and cured in oven 5 to allow the adhesive to fully react and generate strong adhesion. The pultruded products are pulled by traction device 6. In one embodiment, the heights of the first plasma gun head 202 and the second plasma gun head 203 are adjustable.

[0025] Specifically, the first plasma gun head 202 and the second plasma gun head 203 are height-adjusted through independent height adjustment mechanisms.

[0026] The height adjustment mechanism can be a pneumatic cylinder, a hydraulic cylinder, or other structures capable of height adjustment.

[0027] In one embodiment, the first plasma gun head 202 and the second plasma gun head 203 are staggered.

[0028] Example 1 Producing glass fiber-epoxy pultruded composite rods with a width of 20mm and a thickness of 5mm, and applying the PVC coating process of this invention to the upper and lower end faces of the rods: The plasma treatment device 3 selects a first plasma gun head 202 and a second plasma gun head 203 with a diameter of 30mm. The equipment is installed on the stand and the machine head is adjusted to a position 5-10mm above the center so that the pultruded product can pass horizontally between the first plasma gun head 202 and the second plasma gun head 203. During the pultrusion process, the plasma treatment device 2 is started, followed by the glue spraying mechanism 3. The glue spraying mechanism 3 uses a two-component epoxy adhesive as the structural adhesive and adheres a 40mm wide rigid PVC film. After passing through the pressure roller, the adhesive is evenly distributed and the PVC film is flat. The entire assembly enters oven 5, where the temperature is set to 80℃. The structural adhesive hardens as it leaves oven 5, and the PVC film remains flat. Using the edge of the pultruded product as a boundary, a PVC film edge cutting mechanism is set up to cut off the excess PVC film on both sides of the pultruded product, thus completing the surface coating work.

[0029] Example 2 Pultrusion die 1 produces carbon fiber-epoxy pultruded composite material sheets with a width of 100mm and a thickness of 10mm. PVC film is applied to the upper and lower end faces of the sheet using the process of this invention. The plasma treatment device 2 uses a first plasma gun head 202 and a second plasma gun head 203 with a diameter of 50mm, and is designed with a sweeping device along the sample width direction. The sweeping device, the first plasma gun head 202 and the second plasma gun head 203 are installed on the stand 201. The first plasma gun head 202 and the second plasma gun head 203 are adjusted to a position 5-10mm above the center so that the pultruded product can pass horizontally between the first plasma gun head 202 and the second plasma gun head 203. During the pultrusion process, the plasma treatment device 2 is activated. The first plasma gun head 202 and the second plasma gun head 203 are able to treat the entire width of the sheet through the sweeping device. Then, the glue spraying mechanism 3 is activated. Acrylic AB glue is selected as the structural glue and a 100mm wide PVC film is adhered. After the whole thing passes through the pressure roller, the glue is evenly distributed and the PVC film is flat. The entire assembly enters a semi-open oven 5, with the oven temperature set to 60℃. The structural adhesive hardens upon exiting the oven 5, and the PVC film remains flat, completing the surface coating process.

[0030] Before operation, adjust the first plasma gun head 202 and the second plasma gun head 203 to the appropriate positions to avoid interference between the first plasma gun head 202 and the second plasma gun head 203 and the pultruded product; the glue coating mechanism 3 needs to be designed with an appropriate glue dispensing amount according to the movement speed of the pultruded product to avoid the glue layer being too thick. Depending on the process requirements, the number of rollers in the PVC film roll forming mechanism 4 can be adjusted until the surface requirements are met.

[0031] By bonding a PVC film to the surface of pultruded products online, the process is simplified and the structural toughness of the pultruded products is improved. Furthermore, a plasma treatment device 2 is introduced before coating to improve the interfacial properties between the structural adhesive and the surface of the pultruded product, thereby enhancing the stability and durability of the adhesive film.

[0032] The above description is an explanation of this application and not a limitation thereof. The scope of this application is defined by the claims. Within the scope of protection of this application, any form of modification may be made.

Claims

1. A surface film application assembly for use in the manufacture of a pultruded product, the assembly comprising: The device comprises, arranged in sequence: a pultrusion die (1) for forming a pultrusion product; a plasma treatment device (2) for plasma treating the surface of the formed pultrusion product; a gluing mechanism (3) for gluing the pultrusion product treated by plasma; a PVC film roll forming mechanism (4) for attaching PVC film to the upper and lower sides of the pultrusion product after gluing, and then roll forming; an oven (5) for baking and curing the roll formed pultrusion product; a traction device (6) for pulling the cured pultrusion product; The plasma treatment device (2) comprises a gantry (201), the gantry (201) is provided with a first plasma gun head (202) and a second plasma gun head (203), the pultrusion product can pass through the first plasma gun head (202) and the second plasma gun head (203), and the upper and lower sides of the pultrusion product are treated by plasma through the first plasma gun head (202) and the second plasma gun head (203) respectively.

2. A set of surface film application devices for a pultruded product according to claim 1, characterized in that: The height of the first plasma gun head (202) and the second plasma gun head (203) can be adjusted.

3. A set of surface film application devices for a pultruded product according to claim 2, characterized in that: The first plasma gun head (202) and the second plasma gun head (203) are arranged staggered.

4. The surface film assembly set for a pultruded product according to claim 2, wherein: The pultrusion die (1) produces a pultrusion product with a width of 20mm and a thickness of 5mm, and the plasma treatment device (2) adopts a first plasma gun head (202) and a second plasma gun head (203) with a diameter of 30mm.

5. A set of surface film application devices for a pultruded product according to claim 4, characterized in that: The first plasma gun head (202) and the second plasma gun head (203) are adjusted to be 5mm-10mm away from the center of the pultrusion product.

6. A set of surface film application devices for a pultruded product according to claim 5, characterized in that: The gluing mechanism (3) adopts a two-component epoxy adhesive, and the oven (5) is set to 80℃.

7. The surface film assembly set for a pultruded product according to claim 1, wherein: The pultrusion die (1) produces a pultrusion product with a width of 100mm and a thickness of 10mm, and the plasma treatment device (2) adopts a first plasma gun head (202) and a second plasma gun head (203) with a diameter of 50mm.

8. A set of surface film application devices for a pultruded product according to claim 7, characterized in that: The first plasma gun head (202) and the second plasma gun head (203) are adjusted to be 5mm-10mm away from the center of the pultrusion product.

9. A set of surface film application devices for a pultruded product according to claim 8, characterized in that: The gantry (201) is further provided with a sweeping device, so that the first plasma gun head (202) and the second plasma gun head (203) can treat the entire width of the pultrusion product.

10. A set of surface film application devices for a pultruded product according to claim 9, characterized in that: The gluing mechanism (3) adopts an acrylic AB adhesive, and the oven (5) is set to 60℃.

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