Integrated molding equipment for composite eva film
By using a composite EVA film integrated molding equipment, and by employing film wrapping, guide plate, and air bladder extrusion technology, the problems of insufficient cooling and air bubbles in EVA film molding have been solved, thus achieving efficient composite film molding.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG VENTURA PHOTOVOLTAIC MATERIALS
- Filing Date
- 2025-05-16
- Publication Date
- 2026-04-17
Smart Images
Figure CN224130514U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of composite film forming, and in particular to a composite EVA film integrated forming equipment. Background Technology
[0002] Existing EVA film forming methods utilize an extrusion die and two cooling rollers for compression molding. However, the cooling rollers cannot guarantee sufficient cooling during the forming process, resulting in poor EVA film forming quality. Furthermore, existing technologies require waiting for the EVA film to cool before laminating both sides, leading to multiple steps in the production of the composite film. During the lamination process, a large number of air bubbles are easily generated during film bonding, resulting in a low yield rate of the composite film and reducing the quality of the composite EVA in use. Utility Model Content
[0003] In order to overcome the shortcomings of existing EVA composite film molding processes that are long and difficult to guarantee molding quality, this utility model provides an integrated molding equipment for composite EVA films.
[0004] The technical solution of this utility model is as follows: a composite EVA film integrated molding equipment, including a first unwinding machine, a second unwinding machine, an extrusion molding machine, and a feeding mechanism; the second unwinding machine is arranged to the right of the first unwinding machine; the extrusion molding machine is arranged between the first unwinding machine and the second unwinding machine; the feeding mechanism is arranged behind the extrusion molding machine; it also includes an extrusion die, a guide plate, an air bladder, a fourth connecting pipe, and a connecting valve; the extrusion die is arranged on the feeding mechanism; a guide plate is installed at the lower part of the extrusion die; an air bladder is fixedly connected inside the guide plate; the air bladder is threadedly connected to the fourth connecting pipe; the fourth connecting pipe is fixedly connected to the extrusion die; and a connecting valve is installed on the fourth connecting pipe.
[0005] As a preferred technical solution of this utility model, the guide plate is an arc-shaped plate.
[0006] As a preferred technical solution of this utility model, the airbag is a cylindrical long tube structure.
[0007] As a preferred embodiment of this utility model, the extrusion molding machine includes a first forming roller, a second forming roller, a motor, a differential, and a first connecting pipe; the extrusion molding machine includes a bottom support, on which the first forming roller and the second forming roller are rotatably connected; a motor is fixedly connected to the rear side of the bottom support; the output shaft of the motor is fixedly connected to the drive wheel of the differential, and the differential realizes power transmission to the first forming roller and the second forming roller under the action of the motor; the front sides of the first forming roller and the second forming roller are rotatably connected to the first connecting pipe; the first connecting pipe is fixed on the bottom support.
[0008] It should be noted that both the first unwinder and the second unwinder are existing unwinding technologies, with the first unwinder unwinding the first film and the second unwinder unwinding the second film.
[0009] The existing EVA film forming process only uses a first forming roller, a second forming roller, and an extrusion die. The specific operation is as follows: the forming adhesive is formed using the extrusion die, and the first and second forming rollers are rotated and squeezed to form the adhesive. During this process, it is necessary to ensure that the first and second forming rollers are kept cool at all times. After forming, the first and second films need to be attached to both sides of the film. The operation process is complicated and prone to forming defects.
[0010] To address the aforementioned deficiencies, this invention provides a first unwinding machine and a second unwinding machine, wherein the first unwinding machine unwinds the first film and the second unwinding machine unwinds the second film. Based on this, this application can wrap the EVA film with the first and second films during the pressing process, directly reducing the temperature requirements of the first and second forming rollers. It eliminates the need to wait for the EVA film to set before applying films to both sides, reducing the forming process of the composite film and also reducing the space occupied by the equipment.
[0011] However, in the above operation, there may be local air bubbles in the glue between the first forming roller and the second forming roller. In order to improve the quality of direct molding, during the extrusion process of the extrusion die, a guide plate is used to effectively guide the falling glue, so that the glue falling between the first forming roller and the second forming roller can be stable first, avoiding the problem of a small number of air bubbles from falling from a height. In addition, during this process, the connecting valve is connected to an external air guiding structure, which continuously performs extraction and release operations. Under the action of the fourth connecting pipe, the air bladder inside the guide plate continuously contracts and expands. During the contraction and expansion of the air bladder, the air bladder squeezes the glue between the first forming roller and the second forming roller. The first film and the second film can first come into contact with a small part of the glue, avoiding the problem of air bubbles from direct contact with the glue. This ensures that the glue that has been extruded and molded is complete, thus improving the molding quality.
[0012] As a preferred technical solution of this utility model, it further includes a second connecting pipe, a first cooling platform, a second cooling platform and a third connecting pipe; the first cooling platform is fixedly connected to the right side of the first unwinding machine; the second cooling platform is fixedly connected to the left side of the second unwinding machine; the third connecting pipe is provided between the first cooling platform and the second cooling platform; the second connecting pipe is rotatably connected to the rear side of the first forming roller; the second connecting pipe is fixed on the bottom support; the second connecting pipe is connected to the first cooling platform.
[0013] As a preferred embodiment of this utility model, both the first cooling platform and the second cooling platform are hollow rectangular tubes.
[0014] As a preferred technical solution of this utility model, the upper surface of the first cooling platform and the second cooling platform are smooth, and the lower inner surface is covered with heat insulation cotton.
[0015] The beneficial effects of this utility model are:
[0016] I. In the pressing process, this utility model uses a first film and a second film to wrap the EVA film, which directly reduces the temperature requirements of the first forming roller and the second forming roller. It eliminates the need to wait for the EVA film to set before applying the film to both sides, thus directly reducing the forming process of the composite film and also reducing the space occupied by the equipment.
[0017] Second, this utility model utilizes an airbag to squeeze the adhesive between the first forming roller and the second forming roller, avoiding the problem of air bubbles that would occur if the adhesive were in direct contact with the roller, thus ensuring that the adhesive after extrusion molding is intact and improving molding quality.
[0018] Third, in the upper half of the entire molding area, the first film and the second film are in a relatively stable space and will not be affected by the hot glue extruded from the extrusion die. This fully ensures that the first film and the second film will not shrink during the molding process, thus improving the molding quality of the composite film. Attached Figure Description
[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention from a first perspective;
[0020] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from a second perspective;
[0021] Figure 3 This is a three-dimensional structural diagram of the combined extrusion die, guide plate, and air bladder of this utility model;
[0022] Figure 4 This is a three-dimensional structural diagram of the first combination of the first forming roller, the second forming roller assembly, the first cooling platform, and the second cooling platform of the present invention.
[0023] Figure 5 This is a schematic diagram of a second combination of the first forming roller, the second forming roller assembly, the first cooling platform, and the second cooling platform of this utility model.
[0024] The diagram is labeled as follows: 1-First unwinding machine, 2-Second unwinding machine, 3-Extrusion molding machine, 4-Feeding mechanism, 101-First film, 201-Second film, 301-First forming roller, 302-Second forming roller, 303-Motor, 304-Differential gear, 305-First connecting pipe, 306-Second connecting pipe, 307-First cooling platform, 308-Second cooling platform, 309-Third connecting pipe, 401-Extrusion die, 402-Guide plate, 403-Airbag, 404-Fourth connecting pipe, 405-Connecting valve. Detailed Implementation
[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0026] Example 1
[0027] A composite EVA film integral molding equipment, such as Figures 1-5 As shown, it includes a first unwinding machine 1, a second unwinding machine 2, an extrusion molding machine 3, and a feeding mechanism 4; the second unwinding machine 2 is located to the right of the first unwinding machine 1; the extrusion molding machine 3 is located between the first unwinding machine 1 and the second unwinding machine 2; the feeding mechanism 4 is located behind the extrusion molding machine 3.
[0028] It also includes an extrusion die 401, a guide plate 402, an air bladder 403, a fourth connecting pipe 404, and a connecting valve 405; the feeding mechanism 4 is provided with an extrusion die 401; a guide plate 402 is installed at the lower part of the extrusion die 401; an air bladder 403 is fixedly connected inside the guide plate 402; the air bladder 403 is threadedly connected to the fourth connecting pipe 404; the fourth connecting pipe 404 is fixedly connected to the extrusion die 401; and a connecting valve 405 is installed on the fourth connecting pipe 404.
[0029] The guide plate 402 is an arc-shaped plate used to guide the flow of colloids.
[0030] Airbag 403 is a cylindrical long tube structure used to balance the colloid and reduce air bubbles.
[0031] The extrusion molding machine 3 includes a first forming roller 301, a second forming roller 302, a motor 303, a differential 304, and a first connecting pipe 305. The extrusion molding machine 3 includes a bottom support, on which the first forming roller 301 and the second forming roller 302 are rotatably connected. The motor 303 is fixedly connected to the rear side of the bottom support. The output shaft of the motor 303 is fixedly connected to the drive wheel of the differential 304. Under the action of the motor 303, the differential 304 realizes the power transmission to the first forming roller 301 and the second forming roller 302. The front sides of the first forming roller 301 and the second forming roller 302 are rotatably connected to the first connecting pipe 305. The first connecting pipe 305 is fixed on the bottom support.
[0032] It should be noted that both the first unwinder 1 and the second unwinder 2 belong to existing unwinding technology, wherein the first unwinder 1 unwinds the first film 101; and the second unwinder 2 unwinds the second film 201.
[0033] The existing EVA film forming process only uses a first forming roller 301, a second forming roller 302, and an extrusion die 401. Specifically, the extrusion die 401 is used to form the adhesive, and the rotating first forming roller 301 and second forming roller 302 are used to rotate and extrude the adhesive. During this process, it is necessary to ensure that the first forming roller 301 and second forming roller 302 are constantly cooled. After forming, the first film 101 and the second film 201 need to be attached to both sides of the film. The operation process is complicated and prone to forming defects.
[0034] To address the aforementioned deficiencies, this invention provides a first unwinding machine 1 and a second unwinding machine 2, wherein the first unwinding machine 1 unwinds the first film 101 and the second unwinding machine 2 unwinds the second film 201. Based on this, this application can wrap the EVA film with the first film 101 and the second film 201 during the pressing process, directly reducing the temperature requirements of the first forming roller 301 and the second forming roller 302. It eliminates the need to wait for the EVA film to set before applying film to both sides, reducing the forming process of the composite film and also reducing the space occupied by the equipment.
[0035] However, in the above operation, there may be local air bubbles in the glue between the first forming roller 301 and the second forming roller 302. In order to improve the quality of direct molding, during the extrusion process of the extrusion die 401, the guide plate 402 is used to effectively guide the falling glue, so that the glue falling between the first forming roller 301 and the second forming roller 302 can be stable first, avoiding the problem of a small number of air bubbles from falling from a height. In this process, the connecting valve 405 is connected to an external air guiding structure, which continuously performs extraction and release operations. Under the air guiding action of the fourth connecting pipe 404, the air bladder 403 inside the guide plate 402 continuously contracts and expands. During the contraction and expansion of the air bladder 403, the air bladder 403 squeezes the glue between the first forming roller 301 and the second forming roller 302. The first film 101 and the second film 201 can first contact a small part of the glue, avoiding the problem of air bubbles from direct contact with the glue, so that the glue that has been extruded and molded is complete, thus improving the molding quality.
[0036] Example 2
[0037] Based on Embodiment 1, it also includes a second connecting pipe 306, a first cooling platform 307, a second cooling platform 308, and a third connecting pipe 309; the first cooling platform 307 is bolted to the right side of the first unwinding machine 1; the second cooling platform 308 is fixedly connected to the left side of the second unwinding machine 2; the third connecting pipe 309 is provided between the first cooling platform 307 and the second cooling platform 308 for gas flow to achieve cooling; the second connecting pipe 306 is rotatably connected to the rear side of the first forming roller 301; the second connecting pipe 306 is fixed on the bottom support; the second connecting pipe 306 is connected to the first cooling platform 307.
[0038] Both the first cooling platform 307 and the second cooling platform 308 are hollow rectangular tubes.
[0039] The upper side of the first cooling platform 307 and the second cooling platform 308 are smooth surfaces, and the lower inside is lined with insulation cotton.
[0040] During the unwinding process of the first film 101 and the second film 201, the surface temperature of the films near the first forming roller 301 and the second forming roller 302 needs to be kept as consistent as possible to prevent shrinkage of the films during extrusion molding. Therefore, it is necessary to ensure smooth unwinding of the first film 101 and the second film 201 while maintaining their temperatures as consistent as possible. Thus, during the unwinding process, the first cooling platform 307 and the second cooling platform 308 are used to cool the first film 101 and the second film 201, respectively. The cooling process starts from the first forming roller 301, and a cold air conveying mechanism is connected to the rear side of the first forming roller 301 to deliver cold air into the first forming roller 301. The first forming roller 301 conducts cold air to the second forming roller 302 through the first connecting pipe 305. The second forming roller 302 conducts cold air to the first cooling platform 307 through the second connecting pipe 306. The first cooling platform 307 conducts cold air to the second cooling platform 308 through the third connecting pipe 309, and then conducts it back to the cold air conveying mechanism. In this process, the first forming roller 301, the second forming roller 302, the first cooling platform 307 and the second cooling platform 308 achieve uniform temperature connection. That is to say, in the upper half of the entire forming area, the first film 101 and the second film 201 are in a relatively stable space and will not be affected by the hot glue extruded by the extrusion die 401. This can fully ensure that the first film 101 and the second film 201 will not shrink during the forming process, thus improving the forming quality of the composite film.
[0041] However, in the above operation, there may be local air bubbles in the glue between the first forming roller 301 and the second forming roller 302. In order to improve the quality of direct molding, during the extrusion process of the extrusion die 401, the guide plate 402 is used to effectively guide the falling glue, so that the glue falling between the first forming roller 301 and the second forming roller 302 can be stable first, avoiding the problem of a small number of air bubbles from falling from a height. In this process, the connecting valve 405 is connected to an external air guiding structure, which continuously performs extraction and release operations. Under the air guiding action of the fourth connecting pipe 404, the air bladder 403 inside the guide plate 402 continuously contracts and expands. During the contraction and expansion of the air bladder 403, the air bladder 403 squeezes the glue between the first forming roller 301 and the second forming roller 302. The first film 101 and the second film 201 can first contact a small part of the glue, avoiding the problem of air bubbles from direct contact with the glue, so that the glue that has been extruded and molded is complete, thus improving the molding quality.
[0042] It also includes a second connecting pipe 306, a first cooling platform 307, a second cooling platform 308, and a third connecting pipe 309; the first cooling platform 307 is fixedly connected to the right side of the first unwinding machine 1; the second cooling platform 308 is fixedly connected to the left side of the second unwinding machine 2; the third connecting pipe 309 is provided between the first cooling platform 307 and the second cooling platform 308; the second connecting pipe 306 is rotatably connected to the rear side of the first forming roller 301; the second connecting pipe 306 is fixed on the bottom support; the second connecting pipe 306 is connected to the first cooling platform 307.
[0043] Both the first cooling platform 307 and the second cooling platform 308 are hollow rectangular tubes.
[0044] The upper side of the first cooling platform 307 and the second cooling platform 308 are smooth surfaces, and the lower inside is lined with insulation cotton.
[0045] During the unwinding process of the first film 101 and the second film 201, the surface temperature of the films near the first forming roller 301 and the second forming roller 302 needs to be kept as consistent as possible to prevent shrinkage of the films during extrusion molding. Therefore, it is necessary to ensure smooth unwinding of the first film 101 and the second film 201 while maintaining their temperatures as consistent as possible. Thus, during the unwinding process, the first cooling platform 307 and the second cooling platform 308 are used to cool the first film 101 and the second film 201, respectively. The cooling process starts from the first forming roller 301, and a cold air conveying mechanism is connected to the rear side of the first forming roller 301 to deliver cold air into the first forming roller 301. The first forming roller 301 conducts cold air to the second forming roller 302 through the first connecting pipe 305. The second forming roller 302 conducts cold air to the first cooling platform 307 through the second connecting pipe 306. The first cooling platform 307 conducts cold air to the second cooling platform 308 through the third connecting pipe 309, and then conducts it back to the cold air conveying mechanism. In this process, the first forming roller 301, the second forming roller 302, the first cooling platform 307 and the second cooling platform 308 achieve uniform temperature connection. That is to say, in the upper half of the entire forming area, the first film 101 and the second film 201 are in a relatively stable space and will not be affected by the hot glue extruded by the extrusion die 401. This can fully ensure that the first film 101 and the second film 201 will not shrink during the forming process, thus improving the forming quality of the composite film.
[0046] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.
Claims
1. A composite EVA film integrated molding equipment, comprising a first unwinding machine (1), a second unwinding machine (2), an extrusion molding machine (3), and a feeding mechanism (4); the second unwinding machine (2) is arranged to the right of the first unwinding machine (1); the extrusion molding machine (3) is arranged between the first unwinding machine (1) and the second unwinding machine (2); the feeding mechanism (4) is arranged behind the extrusion molding machine (3); characterized in that: It also includes an extrusion die (401), a guide plate (402), an air bladder (403), a fourth connecting pipe (404), and a connecting valve (405); the feeding mechanism (4) is provided with an extrusion die (401); a guide plate (402) is installed at the lower part of the extrusion die (401); an air bladder (403) is fixedly connected inside the guide plate (402); the air bladder (403) is threadedly connected to the fourth connecting pipe (404); the fourth connecting pipe (404) is fixedly connected to the extrusion die (401); and a connecting valve (405) is installed on the fourth connecting pipe (404).
2. The apparatus according to claim 1, wherein: The guide plate (402) is an arc-shaped plate.
3. The composite EVA membrane integrated molding equipment according to claim 1, characterized in that: The airbag (403) is a cylindrical long tube structure.
4. The apparatus according to claim 1, wherein: The extrusion molding machine (3) includes a first forming roller (301), a second forming roller (302), a motor (303), a differential (304), and a first connecting pipe (305); the extrusion molding machine (3) includes a bottom support, on which the first forming roller (301) and the second forming roller (302) are rotatably connected; the motor (303) is fixedly connected to the rear side of the bottom support; the output shaft of the motor (303) is fixedly connected to the drive wheel of the differential (304), and the differential (304) realizes the power transmission to the first forming roller (301) and the second forming roller (302) under the action of the motor (303); the front side of the first forming roller (301) and the second forming roller (302) are rotatably connected to the first connecting pipe (305); the first connecting pipe (305) is fixed on the bottom support.
5. The apparatus of claim 4, wherein: It also includes a second connecting pipe (306), a first cooling platform (307), a second cooling platform (308), and a third connecting pipe (309); the first cooling platform (307) is fixedly connected to the right side of the first unwinding machine (1); the second cooling platform (308) is fixedly connected to the left side of the second unwinding machine (2); the third connecting pipe (309) is provided between the first cooling platform (307) and the second cooling platform (308); the second connecting pipe (306) is rotatably connected to the rear side of the first forming roller (301); the second connecting pipe (306) is fixed on the bottom support; the second connecting pipe (306) is connected to the first cooling platform (307).
6. The apparatus of claim 5, wherein: Both the first cooling platform (307) and the second cooling platform (308) are hollow rectangular tubes.
7. The apparatus of claim 5, wherein: The upper side of the first cooling platform (307) and the second cooling platform (308) are smooth, and the lower side of the interior is lined with insulation cotton.