A prepreg coating device and a coating process thereof

Abstract

The present application relates to the technical fields of prepreg production, and especially relates to a prepreg gluing device and a gluing process thereof, which comprises a base, vertical plates are fixedly installed on both sides of the base along the length direction, prepregs are arranged between the two groups of vertical plates, two groups of vertical through holes are formed in one side of the vertical plate, horizontal guide holes are formed in the upper part of the side of the vertical plate away from the vertical through holes; the present application further comprises a material guiding roller which is rotatably arranged on one side of the top end of the two groups of vertical plates; and a gluing assembly. In actual use, the present application effectively improves the gluing efficiency and quality through the secondary gluing mode, and realizes the recycling of the excess glue. In the gluing process, the anti-sticking film formed by the heat-sensitive microcapsules, the characteristics of the glue layer after the gluing, and the convex points pressed by the pressing assembly, can reduce the sticking phenomenon during the winding of the prepreg, and can restore the stickiness during the subsequent pressing and using, which is convenient for actual processing and use.

Description

Technical Field

[0001] This invention relates to the field of prepreg production technology, and in particular to a prepreg coating device and coating process. Background Technology

[0002] Prepreg, also known as "PP sheet" or "prepreg," is one of the main materials in the production of multilayer boards. It is mainly composed of resin and reinforcing materials. The reinforcing materials are divided into several types, such as fiberglass cloth, paper-based, and composite materials. Most of the prepregs used in the production of multilayer printed circuit boards use fiberglass cloth as the reinforcing material.

[0003] In the production process, adhesive is usually applied to the surface for subsequent pressing and bonding. However, due to the adhesive's inherent viscosity, uneven application and omissions are common during the adhesive application process. Furthermore, during the subsequent winding process, vapor phase corrosion inhibitor paper is used as a spacer to prevent sticking, but this method requires additional steps and is relatively expensive, making it unsuitable for large-scale application. Therefore, we propose a prepreg adhesive application device and its process. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a prepreg coating device and its coating process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A prepreg coating device includes a base, with vertical plates fixedly installed on both sides of the base along the length direction. A prepreg to be coated is inserted between the two sets of vertical plates. Two sets of vertical through holes are opened on one side of the vertical plates, and a horizontal guide hole is opened on the upper part of the side of the vertical plate away from the vertical through holes.

[0007] Also includes:

[0008] The guide roller is rotatably mounted on one side of the top of the two sets of vertical plates and is used to guide the prepreg.

[0009] The adhesive application assembly is fixedly installed at one of the vertical through holes on the vertical plate. The adhesive application assembly includes an adhesive storage tank fixedly installed at the top of the vertical plate and an adhesive application roller slidably installed at the vertical through hole. The adhesive storage tank is filled with adhesive, and the lower two sides of the adhesive application roller are symmetrically embedded with adhesive-impregnated sponges for adhesive impregnation and coating, so that the prepreg is subjected to secondary adhesive coating and the adhesive is effectively covered.

[0010] The glue scraping assembly is slidably arranged at the other group of vertical holes on the two groups of vertical plates, and comprises a glue receiving box and a liftable scraping plate, which is used for controlling the glue coating thickness and recycling the scraped glue;

[0011] The heating assembly is provided with two groups of upper and lower groups, which are located on the side of the glue scraping assembly away from the glue coating assembly, and is used for heating the surface of the prepreg after the glue coating treatment, so that the glue flow is in a semi-cured state.

[0012] The pressure point assembly is provided on the side of the top end of the vertical plate close to the adjusting roller, and is used for array pressure point treatment on the surface of the prepreg after the prepreg treatment, so that the surface of the prepreg is pressed to form an array of convex points, which presents the characteristics of point contact in the subsequent winding process, and reduces the occurrence of sticking phenomenon.

[0013] As a preferred technical solution of the present application, the two ends of the glue coating roller are connected with shaft rods penetrating through the vertical holes in the vertical plate, and the shaft rods are communicated with glue guide pipes, the two sides of the glue storage tank are provided with oil pumps, the output ends of the oil pumps are communicated with the glue guide pipes, which are used for pumping the glue into the glue coating roller, realizing effective filling of the glue into the glue coating roller, and realizing the infiltration of the glue-soaked sponge, and providing sufficient guarantee for the glue coating process;

[0014] The two ends of the glue storage tank are provided with mounting bands, which are mounted on the top of the vertical plate through fixing screws, thereby effectively ensuring the stability of the glue storage tank.

[0015] As a preferred technical solution of the present application, the outer side of the shaft rod is fixedly provided with a sliding locking member, which is U-shaped, the side surface of the vertical plate is provided with a guide groove matched with the guide hole on both sides of the guide hole, and a resisting screw I is threadedly provided on the sliding locking member, thereby effectively ensuring the effective position locking of the glue coating roller during the vertical sliding process following the sliding locking member.

[0016] As a preferred technical solution of the present application, the two ends of the glue receiving box are connected with penetrating members penetrating through the vertical holes in the vertical plate, and a resisting screw II is threadedly provided on the penetrating member, which facilitates the adjustment of the height of the glue scraping assembly as a whole, and better facilitates the glue scraping treatment of the scraping plate;

[0017] The inside of the glue receiving box is provided with an electric heating wire, which ensures the temperature of the scraped and collected glue, avoids solidification, and ensures effective recycling;

[0018] The lower side of the glue receiving box is provided with two groups of recovery pumps, and a recovery pipe is arranged between the recovery pump and the glue receiving box, which facilitates the backflow of the recycled glue, and realizes recycling;

[0019] The top end of the glue receiving box convex point is provided with two groups of push rod motor convex points, the output shaft of the push rod motor convex point is connected with the scraping plate convex point, which is used for adjusting the height of the scraping plate convex point.

[0020] As a preferred technical solution of the present application, the vertical plate is slidingly provided with an adjusting roller at the horizontal guide hole, the shaft center of the adjusting roller extends to the outside of the vertical plate and is connected with a sliding piece, and a locking screw is arranged on the sliding piece, so as to conveniently adjust the position of the adjusting roller, thereby effectively adjusting the deflection angle of the prepreg passing through the adjusting roller below the gluing assembly.

[0021] As a preferred technical solution of the present application, the heating assembly is arranged between the adjusting roller and the glue scraping assembly, and includes a mounting plate, and a plurality of groups of resistance wires are uniformly arranged on opposite sides of the mounting plate, so as to realize temperature treatment on the prepreg after glue scraping treatment, and facilitate the prepreg to reach a semi-cured state.

[0022] By adjusting the positions of the adjusting roller and the glue scraping assembly, the angle of the prepreg passing between the heating assemblies is adjusted, so as to control the passing length of the prepreg between the heating assemblies, and indirectly control the heating time, thereby controlling the semi-cured state.

[0023] As a preferred technical solution of the present application, the vertical plate is fixedly installed with a pressing plate at the top end away from the material guide roller, and a pressing point assembly is arranged above the pressing plate, the pressing point assembly includes lifting motors fixedly installed on both sides of the vertical plate, the output shafts of the lifting motors are connected with bent rods, and a pressing point roller is coaxially connected between the bent rods, and a plurality of semispherical grooves are uniformly arranged on the curved surface of the pressing point roller, so as to press the adhesive not completely semi-cured on the surface of the prepreg, form convex points on the surface of the prepreg, facilitate the prepreg to be wound in a point contact form in the subsequent winding process, and reduce the occurrence of adhesion phenomenon.

[0024] As a preferred technical solution of the present application, the flowing adhesive in the adhesive storage tank is mixed with heat-sensitive microcapsules before pouring, so that when the adhesive layer surface forms an anti-sticking film by means of the heat-sensitive microcapsules under the high pressure and high temperature state before pressing, the adhesion of the winding interface is better reduced.

[0025] A gluing process of a prepreg gluing device includes the following steps:

[0026] Firstly, the prepreg is sent into the device through the material guide roller, passes below the gluing assembly, and then passes out under the adjusting action of the adjusting roller, passes between the pressing plate and the pressing point assembly, and finally is wound on the winding mechanism;

[0027] Gluing treatment: the prepreg is arranged in a V shape below the gluing assembly, and the prepreg is twice coated by the two sets of impregnated sponges below the gluing roller, so that the phenomenon of gluing omission is better avoided, then the distance between the scraper and the prepreg corresponding part is controlled by the adjusted scraping assembly, so that the gluing thickness on the passing prepreg is controlled, and the glue is better uniformly spread, the excess glue is finally collected into the glue receiving box to realize effective recycling, and then pumped into the glue storage tank for recycling;

[0028] Heating semi-curing treatment: the angle of the prepreg conveyed from below the gluing assembly is adjusted by adjusting the position of the roller, so that the distance between the prepreg and the heating assembly is better controlled, and the processing time is better controlled by controlling the winding speed, so that the surface glue is baked, and the temperature between the heating assemblies is controlled between 80 DEG C-150 DEG C at this time, so that the surface glue viscosity is preliminarily reduced, and the winding adhesion phenomenon is reduced, and since the glue mixed with heat-sensitive microcapsules, the anti-sticking film can be effectively formed during gluing treatment, and the anti-sticking effect is better improved;

[0029] Bump pressing: the prepreg conveyed to the pressing plate is pressed by the pressure of the pressing roller of the pressing assembly and the winding device, so that the incomplete semi-cured glue forms uniform distributed micro-bumps, and in the subsequent winding process, the adjacent prepregs are wound in a point contact mode, and the adhesion phenomenon is better reduced;

[0030] In the subsequent pressing process, the heat-sensitive microcapsules are broken under the conditions of high temperature and high pressure, and the glue is melted, the bumps are eliminated, and the viscosity is restored, so that the pressing adhesion effect is realized, the actual winding and transportation are facilitated, and the viscosity recovery effect is realized in the subsequent use process, and the actual production use is better facilitated.

[0031] The beneficial effects of the present application are:

[0032] First, the two sets of impregnated sponges on the gluing assembly are arranged, so that the V-shaped prepreg is twice coated, the omission is effectively reduced, and the adjustable scraping assembly is arranged, the uniformity of the gluing is improved, the gluing thickness is controlled during the gluing process, and the excess glue is recycled;

[0033] Through the mixing of heat-sensitive microcapsules in the adhesive, the adhesive can effectively form an anti-sticking film on the surface after coating, which can preliminarily reduce the sticking phenomenon in the subsequent winding process. After the subsequent semi-curing treatment, and with the help of the setting of the pressure point assembly, multiple convex points are formed on the surface of the adhesive layer at the pressing position, thereby realizing the winding of the semi-cured sheets in a point contact manner, better reducing the occurrence of sticking phenomenon, and in the subsequent pressing process, through the characteristics of the adhesive itself and the characteristics of the heat-sensitive microcapsules that break down at high temperature and high pressure, the semi-cured sheets restore tackiness during pressing, thereby facilitating subsequent use.

[0034] In summary, the present application effectively improves the coating efficiency and quality through secondary coating in actual use, and realizes the recycling of excess adhesive. In the coating process, the anti-sticking film formed by the heat-sensitive microcapsules, the characteristics of the adhesive layer after semi-curing, and the convex points pressed by the pressure point assembly, reduce the occurrence of sticking phenomenon during winding of the semi-cured sheets, and restore tackiness during subsequent pressing, facilitating actual processing and use. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A structure diagram of a semi-cured sheet coating device according to the present application is shown in the figure.

[0036] Figure 2 A partial structure diagram of a semi-cured sheet coating device according to the present application is shown in the figure.

[0037] Figure 3 A partial front view structure diagram of a semi-cured sheet coating device according to the present application is shown in the figure.

[0038] Figure 4 A structure diagram of a coating assembly of a semi-cured sheet coating device according to the present application is shown in the figure.

[0039] Figure 5 A structure diagram of a glue scraping assembly of a semi-cured sheet coating device according to the present application is shown in the figure.

[0040] Figure 6 A structure diagram of a heating assembly of a semi-cured sheet coating device according to the present application is shown in the figure.

[0041] Figure 7 A structure diagram of a pressure point assembly of a semi-cured sheet coating device according to the present application is shown in the figure.

[0042] In the diagram: 1. Base; 2. Pressing point assembly; 21. Lifting motor; 22. Pressing roller; 3. Prepreg; 4. Heating assembly; 41. Mounting plate; 42. Resistance wire; 5. Glue application assembly; 51. Glue storage tank; 52. Mounting belt; 53. Oil pump; 54. Glue guide tube; 55. Sliding locking component; 56. Glue application roller; 57. Glue-impregnated sponge; 6. Guide roller; 7. Adjusting roller; 8. Glue scraper assembly; 81. Glue receiving box; 82. Scraper; 83. Push rod motor; 84. Recycling pipe; 85. Through-mount component; 9. Pressing plate; 10. Vertical plate. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0044] Reference Figures 1-7 A prepreg coating device includes a base 1, with vertical plates 10 fixedly installed on both sides of the base 1 along the length direction. A prepreg 3 to be coated is inserted between the two sets of vertical plates 10. Two sets of vertical through holes are opened on one side of the vertical plate 10, and a horizontal guide hole is opened on the upper part of the side of the vertical plate 10 away from the vertical through holes.

[0045] Also includes:

[0046] The guide roller 6 is rotatably mounted on one side of the top of the two sets of vertical plates 10 and is used to guide the semi-cured sheet 3.

[0047] The adhesive application assembly 5 is fixedly installed on one of the vertical through holes on the vertical plate 10. The adhesive application assembly 5 includes an adhesive storage tank 51 fixedly installed on the top of the vertical plate 10 and an adhesive application roller 56 slidably installed at the vertical through hole. The adhesive storage tank 51 is filled with adhesive. The lower two sides of the adhesive application roller 56 are symmetrically embedded with adhesive-impregnated sponges 57 for adhesive impregnation and coating, so that the prepreg 3 is coated with adhesive twice to ensure effective coverage of the adhesive. The adhesive in the adhesive storage tank 51 is mixed with heat-sensitive microcapsules before filling, so that after the adhesive treatment, when the high pressure and high temperature of the pressing is not reached, the heat-sensitive microcapsules help to form an anti-stick film on the surface of the adhesive layer, which better reduces the stickiness of the winding interface.

[0048] The glue scraping assembly 8 is slidably disposed at another set of vertical through holes on the two sets of vertical plates 10. The glue scraping assembly 8 includes a glue receiving box 81 and a liftable scraper 82, which are used to control the glue coating thickness and to recycle the scraped glue.

[0049] The heating component 4 has two sets, upper and lower, located on the side of the adhesive scraping component 8 away from the adhesive coating component 5. It is used to heat the surface of the semi-cured sheet 3 after adhesive coating so that the adhesive is in a semi-cured state.

[0050] The pressure point assembly 2 is arranged at the top end of the vertical plate 10 near one side of the adjusting roller 7, and is used for array pressure point processing on the surface of the prepreg 3 after the prepreg processing, so that the surface of the prepreg 3 is pressed to form an array of convex points, and in the subsequent winding process, the point contact feature is presented, and the occurrence of adhesion phenomenon is reduced.

[0051] Referring to Figures 3-4 The two ends of the glue coating roller 56 are connected with shaft rods penetrating through the vertical through holes of the vertical plate 10, and the shaft rods are communicated with the glue guide pipes 54. The two sides of the glue storage tank 51 are both provided with oil pumps 53, the output ends of the oil pumps 53 are communicated with the glue guide pipes 54, and the oil pumps 53 are used for pumping glue into the glue coating roller 56, so that the glue agent is effectively filled into the glue coating roller 56, and the impregnation of the glue impregnated sponge 57 is realized, thereby providing sufficient guarantee for the glue coating process.

[0052] The two ends of the glue coating roller 56 are connected with shaft rods penetrating through the vertical through holes of the vertical plate 10, and the shaft rods are communicated with the glue guide pipes 54. The two sides of the glue storage tank 51 are both provided with oil pumps 53, the output ends of the oil pumps 53 are communicated with the glue guide pipes 54, and the oil pumps 53 are used for pumping glue into the glue coating roller 56, so that the glue agent is effectively filled into the glue coating roller 56, and the impregnation of the glue impregnated sponge 57 is realized, thereby providing sufficient guarantee for the glue coating process.

[0053] The outer side of the shaft rod is fixedly provided with a sliding locking piece 55, the sliding locking piece 55 is in a U shape, the side surface of the vertical plate 10 is provided with a guide groove matched with the guide through hole on both sides of the guide through hole, and a resisting screw I is threadedly penetrated in the sliding locking piece 55, so that the position of the glue coating roller 56 is effectively locked during the vertical sliding process of the glue coating roller 56 following the sliding locking piece 55.

[0054] Referring to Figure 5 The two ends of the glue coating roller 56 are connected with shaft rods penetrating through the vertical through holes of the vertical plate 10, and the shaft rods are communicated with the glue guide pipes 54. The two sides of the glue storage tank 51 are both provided with oil pumps 53, the output ends of the oil pumps 53 are communicated with the glue guide pipes 54, and the oil pumps 53 are used for pumping glue into the glue coating roller 56, so that the glue agent is effectively filled into the glue coating roller 56, and the impregnation of the glue impregnated sponge 57 is realized, thereby providing sufficient guarantee for the glue coating process.

[0055] The inside of the glue receiving box 81 is provided with an electric heating wire, so as to ensure the temperature of the scraped and collected glue, avoid solidification, and ensure effective recycling.

[0056] The lower side of the glue receiving box 81 is provided with two groups of recovery pumps, and a recovery pipe 84 is arranged between the recovery pumps and the glue receiving box 81, so that the recovered glue agent can flow back, and recycling is realized.

[0057] The top end of the glue receiving box 81 is provided with two groups of push rod motors 83, the output shafts of the push rod motors 83 are connected with the scraper plates 82, and the height of the scraper plates 82 is adjusted.

[0058] Referring to Figures 1-3The vertical plate 10 is slidably provided with an adjusting roller 7 at the horizontal guide hole, the shaft center of the adjusting roller 7 extends to the outside of the vertical plate 10 and is connected with a sliding piece, and a locking screw is arranged on the sliding piece, so as to conveniently adjust the position of the adjusting roller 7, and effectively adjust the deflection angle of the prepreg 3 passing through the adjusting roller 7 below the glue applying assembly 5.

[0059] With reference to Figure 2 and Figure 6 The heating assembly 4 is arranged between the adjusting roller 7 and the glue scraping assembly 8, and includes a mounting plate 41, and a plurality of groups of resistance wires 42 are uniformly arranged on opposite sides of the mounting plate 41, so as to realize the temperature rising treatment of the prepreg 3 after the glue scraping treatment, and facilitate the prepreg 3 to reach the semi-cured state.

[0060] By adjusting the positions of the adjusting roller 7 and the glue scraping assembly 8, the angle of the prepreg 3 passing through the heating assembly 4 is adjusted, so as to control the passing length of the prepreg 3 between the heating assembly 4, and indirectly control the heating time, so as to control the semi-cured state.

[0061] With reference to Figures 1-2 and Figure 7 The pressing plate 9 is fixedly installed at the top end of the vertical plate 10 away from the material guide roller 6, and the pressing point assembly 2 is arranged above the pressing plate 9. The pressing point assembly 2 includes lifting motors 21 fixedly installed on both sides of the vertical plate 10, the output shafts of the lifting motors 21 are connected with bent rods, and pressing point rollers 22 are coaxially connected between the bent rods. The curved surface of the pressing point roller 22 is uniformly provided with semispherical grooves, so as to press the glue not completely semi-cured on the surface of the prepreg 3, so that the surface of the prepreg 3 forms convex points, and the prepregs are wound in the form of point contact in the subsequent winding process, so as to reduce the occurrence of adhesion.

[0062] A glue applying process of a prepreg glue applying device, including the following steps:

[0063] Firstly, the prepreg 3 is sent into the device through the material guide roller 6, and passes through below the glue applying assembly 5, and then passes out under the adjusting action of the adjusting roller 7, and passes through between the pressing plate 9 and the pressing point assembly 2, and finally is wound on the winding mechanism;

[0064] Gluing treatment: the prepreg 3 is arranged in a V shape below the gluing assembly 5, and the prepreg 3 is twice treated by the impregnation sponge 57 below the two sides of the gluing roller 56, so that the phenomenon of gluing omission is avoided, then the distance between the scraper 82 and the prepreg 3 is controlled by the adjusted glue scraping assembly 8, the thickness of the glue on the prepreg 3 is controlled, the glue is uniformly spread, the excess glue is finally collected in the glue receiving box 81, and the glue is recycled by pumping into the glue storage tank 51;

[0065] Heating semi-curing treatment: the angle of the prepreg 3 conveyed from below the gluing assembly 5 is adjusted by adjusting the position of the roller 7, the distance between the prepreg 3 and the heating assembly 4 is better controlled, the processing time is better controlled by controlling the winding speed, so that the glue on the surface is baked, and the temperature between the heating assembly 4 is controlled between 80-150 DEG C, so that the surface viscosity of the glue is preliminarily reduced, the winding adhesion phenomenon is reduced, and the anti-adhesion film is effectively formed during the gluing treatment because the glue contains heat-sensitive microcapsules, and the anti-adhesion effect is better improved;

[0066] Bump pressing: the prepreg 3 conveyed to the pressing plate 9 is pressed by the pressure of the pressing point assembly 2 and the winding device, so that the glue that is not completely semi-cured forms uniform distribution of micro-bumps, and the adjacent prepregs 3 are wound in a point contact manner, so that the adhesion phenomenon is better reduced;

[0067] In the subsequent pressing process, the heat-sensitive microcapsules are broken under the conditions of high temperature and high pressure, the glue is melted, the bumps are eliminated, the viscosity is restored, and the pressing adhesion effect is realized, which is convenient for actual winding and transportation, and the viscosity recovery effect is realized in the subsequent use, which is better convenient for actual production and use.

[0068] Finally, it should be noted that in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0069] In the description of the application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A prepreg coating device, comprising a base (1), wherein vertical plates (10) are fixedly installed on both sides of the base (1) along the length direction, and a prepreg (3) is inserted between the two sets of vertical plates (10), characterized in that, Two sets of vertical through holes are provided on one side of the vertical plate (10), and a horizontal guide hole is provided on the upper part of the side of the vertical plate (10) away from the vertical through holes; Also includes: The guide roller (6) is rotatably mounted on one side of the top of the two sets of vertical plates (10); The glue application assembly (5) is fixedly installed on one of the vertical through holes on the vertical plate (10). The glue application assembly (5) includes a glue storage tank (51) fixedly installed on the top of the vertical plate (10) and a glue application roller (56) slidably installed at the vertical through hole. The glue storage tank (51) is filled with glue, and glue-impregnated sponges (57) are symmetrically embedded on both sides of the lower part of the glue application roller (56). The glue scraping assembly (8) is slidably disposed at another set of vertical through holes on two sets of vertical plates (10). The glue scraping assembly (8) includes a glue receiving box (81) and a scraper (82). The heating component (4) is provided with two sets, upper and lower, located on the side of the glue scraping component (8) away from the glue application component (5); The vertical plate (10) is slidably provided with an adjusting roller (7) at the horizontal guide hole. The axis of the adjusting roller (7) extends to the outside of the vertical plate (10) and is connected to a sliding member. The sliding member is provided with a locking screw. The pressure point assembly (2) is located on the top of the vertical plate (10) near the adjusting roller (7); A pressing plate (9) is fixedly installed on the side of the top of the vertical plate (10) away from the guide roller (6), and the pressing point assembly (2) is set above the pressing plate (9). The pressing point assembly (2) includes a lifting motor (21) fixedly installed on both sides of the vertical plate (10). The output shaft of the lifting motor (21) is connected to a bent rod, and a pressing point roller (22) is coaxially connected between the bent rods. The curved surface of the pressing point roller (22) is uniformly provided with hemispherical grooves, which facilitates pressing the adhesive on the surface of the semi-cured sheet (3) that is not completely semi-cured, so that the surface of the semi-cured sheet forms protrusions, which facilitates the semi-cured sheets to be wound in the form of point contact during the subsequent winding process, reducing the occurrence of adhesion.

2. The prepreg coating apparatus according to claim 1, characterized in that, The two ends of the coating roller (56) are connected to shafts that pass through vertical holes in the vertical plate (10), and a guide tube (54) is connected to the shafts. Oil pumps (53) are installed on both sides of the glue storage tank (51), and the output end of the oil pump (53) is connected to the guide tube (54). The outer sides of both ends of the glue storage tank (51) are fitted with mounting straps (52), which are installed on the top of the vertical plate (10) by fixing screws.

3. The prepreg coating apparatus according to claim 2, characterized in that, A sliding locking component (55) is fixedly installed on the outside of the shaft. The sliding locking component (55) is U-shaped. The side of the vertical plate (10) is provided with guide grooves on both sides of the guide through hole. A contact screw I is threaded through the sliding locking component (55).

4. The prepreg coating apparatus according to claim 1, characterized in that, Both ends of the glue box (81) are connected to through parts (85) that pass through the vertical through holes on the vertical plate (10), and the through parts (85) are threaded with anti-screws II; The glue receiving box (81) is equipped with a heating wire inside; Two sets of recycling pumps are provided below the glue receiving box (81), and a recycling pipe (84) is provided between the recycling pumps and the glue receiving box (81). Two sets of push rod motors (83) are installed at the top of the glue receiving box (81), and the output shaft of the push rod motor (83) is connected to the scraper (82).

5. The prepreg coating apparatus according to claim 1, characterized in that, The heating component (4) is disposed between the adjusting roller (7) and the scraping component (8), and includes a mounting plate (41). Several sets of resistance wires (42) are evenly arranged on the opposite side of the mounting plate (41). By adjusting the position of the adjusting roller (7) and the scraper assembly (8), the angle of the semi-cured sheet (3) passing between the heating assemblies (4) is adjusted, thereby controlling the length of the semi-cured sheet (3) passing between the heating assemblies (4) and indirectly controlling the heating time, thereby controlling the semi-cured state to a certain extent.

6. The prepreg coating apparatus according to claim 1, characterized in that, The gel in the storage tank (51) is mixed with heat-sensitive microcapsules before filling.

7. A coating process for a prepreg coating apparatus according to any one of claims 1-6, characterized in that, Includes the following steps: First, the semi-cured sheet (3) is fed into the device through the guide roller (6) and passes under the glue coating assembly (5). Then, it passes out under the adjustment of the adjusting roller (7) and passes through the pressing plate (9) and the pressing point assembly (2), and finally winds onto the winding mechanism. Adhesive coating process: The prepreg (3) is arranged in a V-shape below the adhesive coating assembly (5). During the adhesive coating process, the prepreg (3) is coated twice by the adhesive-impregnated sponge (57). Then, under the action of the adjusted scraper assembly (8), the thickness of the adhesive coating on the prepreg (3) is controlled, the adhesive flow is evenly spread, and the excess adhesive is finally collected in the adhesive collection box (81) for recycling. Then, it is pumped into the adhesive storage tank (51) for recycling. Heating semi-curing treatment: The semi-cured sheet (3) passes through the heating assembly (4). By controlling the temperature between the heating assemblies (4) between 80℃ and 150℃, the surface adhesive viscosity is initially reduced, and the phenomenon of winding and sticking is reduced. Since the adhesive contains heat-sensitive microcapsules, an anti-sticking film can be effectively formed during the coating process, which can better improve the anti-sticking effect. Convex pressing: The semi-cured sheet (3) transmitted to the pressing plate (9) is pressed by the pressure of the pressing roller (22) on the pressing assembly (2) and the action of the winding device, so that the not fully semi-cured adhesive forms uniformly distributed small bumps, which better reduces the occurrence of sticking during the winding process.

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