Co-extrusion system for processing high-barrier environment-friendly super-clear PVB (polyvinyl butyral) intermediate film

Abstract

The invention relates to the technical field of PVB (polyvinyl butyral) intermediate film processing and co-extrusion, in particular to a co-extrusion system for high-barrier environment-friendly super-clear PVB intermediate film processing, which comprises a bottom plate, a co-extrusion box and barrels, the barrels are fixedly connected to the front sides of the upper ends of a plurality of bases, and extrusion components are mounted on the inner walls of the barrels and the box. And an extrusion structure is mounted on the outer wall of the co-extrusion box. Through the cooperation of an extrusion pipe, an inner connecting pipe, an outer connecting pipe, a co-extrusion box, a central arc-shaped plate, an inner arc-shaped plate and an outer arc-shaped plate carton, due to the arrangement of the arc-shaped surfaces of the outer walls of the central arc-shaped plate, the inner arc-shaped plate and the outer arc-shaped plate, the surface of a correspondingly extruded flat sheet structure also presents a corresponding fixed arc-shaped surface; the flat sheet structures between the layers can be better attached and fixed, and the problem that the final forming effect is affected due to the fact that due to the fact that a multi-layer pure-plane PVB middle film extrusion design is adopted, the layers are prone to play and the like when attached and fixed is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of PVB interlayer co-extrusion processing, and specifically relates to a co-extrusion system for processing high-barrier environmental protection ultra-clear PVB interlayer films. Background Art

[0002] PVB interlayer films play a crucial safety role in automotive front windshield glass. Almost all commercially available cars' front windshields cannot do without it. The PVB interlayer film includes a surface layer and a core layer. The surface layer is composed of materials such as resin powder and plasticizer, and the core layer is composed of materials such as sound insulation resin. Therefore, multi-layer co-extrusion processing design of PVB interlayer films is required. For example, existing co-extrusion devices for processing sound insulation ribbon-shaped PVB interlayer films include a first extruder, a second extruder, a third extruder, a distributor, and a die.

[0003] However, although it can greatly improve production efficiency, its multi-layer pure planar PVB interlayer film extrusion design is prone to problems such as crosstalk during the bonding and fixing between layers, affecting the final forming effect. At the same time, when adding materials at the feed inlet, most directly stack granular materials inside the feed inlet, and it is prone to problems of blockage of the feed inlet by granular materials during specific use. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems that the multi-layer pure planar PVB interlayer film extrusion design of this device is prone to problems such as crosstalk during the bonding and fixing between layers, affecting the final forming effect. At the same time, when adding materials at the feed inlet, most directly stack granular materials inside the feed inlet, and it is prone to problems of blockage of the feed inlet by granular materials during specific use, and a co-extrusion system for processing high-barrier environmental protection ultra-clear PVB interlayer films is proposed.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: Design a co-extrusion system for processing high-barrier environmental protection ultra-clear PVB interlayer films, including a bottom plate, a co-extrusion box, and a cylinder body. A cylinder body is fixedly connected to the front side of the upper end of each of the multiple bases. A box body, a servo motor, and a speed reducer are installed on the rear side of the upper end of the base. The upper rear side of the outer wall of the cylinder body is fixedly communicated with a feed inlet. A material extrusion component is installed on the inner walls of the cylinder body and the box body. An extrusion structure is installed on the outer wall of the co-extrusion box.

[0006] Preferably, the material extrusion assembly includes an extrusion pipe, a pushing screw, and a baffle plate. The rear end of the pushing screw is rotatably connected to the box body through a sealing bearing. A first gear is fixedly connected to the rear end of the pushing screw. The rotating shafts of multiple baffle plates are respectively rotatably connected to the inner walls on both sides of the feeding port. A third gear is fixedly connected to the rear end of the rotating shaft of the baffle plate. The outer wall of one of the third gears is meshed with a second gear, and the outer wall of the second gear is meshed with the first gear. The rear side of the rotating shaft of the first gear is fixedly connected to the output shaft of the speed reducer. The extrusion pipe is fixedly communicated with the front end of the cylinder body.

[0007] Preferably, a control button is installed above the right side of the outer wall of the box body. The output shaft of the servo motor is fixedly connected to the input shaft of the speed reducer.

[0008] Preferably, a plurality of ear plates are fixedly connected to the outer wall of the cylinder body, and columns are fixedly connected to the lower ends of the ear plates.

[0009] Preferably, the extrusion structure includes a central arc plate, an inner arc plate, and an outer arc plate. The outer arc plates are processed on the left and right sides of the inner wall of the co-extrusion box. A plurality of inner arc plates are fixedly connected to both sides of the center of the inner wall of the co-extrusion box. The central arc plate is fixedly connected to the center of the inner wall of the co-extrusion box. An outer connecting pipe is fixedly connected to the area between the central arc plate and the inner arc plate. An inner connecting pipe is fixedly connected to the area between the inner arc plate and the outer arc plate. The rear ends of both the inner connecting pipe and the outer connecting pipe are fixedly communicated with a reducing pipe.

[0010] Preferably, the inclination states of the central arc plate, the inner arc plate, and the outer arc plate gradually increase in the front-rear direction.

[0011] Preferably, the rear outer wall of the reducing pipe is fixedly communicated with the extrusion pipe through a circular flange.

[0012] Preferably, a square flange is fixedly connected to the front side of the outer wall of the co-extrusion box.

[0013] A co-extrusion system for processing high-barrier environmental protection ultra-clear PVB intermediate film proposed by the present invention has the beneficial effects that: Through the cooperation of the extrusion tube, the inner connecting tube, the outer connecting tube, the co-extrusion box, the central arc plate, the inner arc plate and the outer arc plate of the carton, the extrusion tubes at multiple places convey the molten raw materials to the inside of the co-extrusion box through the inner connecting tube and the outer connecting tube, and are further compressed by the extrusion of the reducing tube during the conveying process. After reaching the co-extrusion box of the conveyor belt, the central arc plate, the inner arc plate and the outer arc plate are all distributed in a state of being narrow in the front and wide in the back, so that the molten raw materials here can be further compressed and formed and initially cooled and formed, and the molten raw materials are extruded into flat sheets due to the narrow front characteristics. Due to the setting of the arc-shaped surfaces on the outer walls of the central arc plate, the inner arc plate and the outer arc plate, the surfaces of the corresponding extruded flat sheet structures also present corresponding arc-shaped surfaces. After being conveyed to the external extrusion die through the square flange, the flat sheet structures between the layers can be better fitted and fixed, and finally extrusion is achieved at the external extrusion die to realize the extrusion processing of the ultra-clear PVB interlayer film, effectively avoiding the problems such as crosstalk that are likely to occur when fitting and fixing between the layers in the extrusion design of the multi-layer pure flat PVB interlayer film, which affect the final forming effect.

[0014] Through the cooperation between the feeding screw, the servo motor, the first gear, the second gear, the third gear, the baffle plate and the feeding port, when the servo motor drives the feeding screw to rotate specifically, the first gear at the end of the feeding screw also rotates accordingly. At the same time, the outer wall of the first gear can also drive the two third gears to rotate synchronously and reversely through the second gear, thereby continuously rotating and turning the baffle plate. In this case, the baffle plate is designed so that while the feeding screw rotates, through the cooperation of the gear set, the baffle plate continuously rotates and turns, driving the granular materials inside the feeding port to be continuously stirred, reducing the situation where the materials at the feeding port form hard blocks or get stuck in a position and cause blockage, effectively avoiding the problem that most directly stack the granular materials inside the feeding port, and it is easy to have the problem of blockage of the granular materials at the feeding port during specific use. Brief Description of the Drawings

[0015] Figure 1 It is a schematic front-side external structure diagram of the present invention; Figure 2 It is a schematic right-side external structure diagram of the present invention; Figure 3 For the present invention Figure 1 The partial cross-sectional structure diagram; Figure 4 For the present invention Figure 2 The structure diagram at the base in the present invention; Figure 5 For the present invention Figure 1 The structure diagram at the base in the present invention; Figure 6 For the present invention Figure 5 The partial cross-sectional structure diagram; Figure 7For the present invention Figure 6 Schematic diagram of the upward view structure in the present invention; Figure 8 For the present invention Figure 3 Schematic diagram of the structure at position I in the present invention.

[0016] In the figure: 1. Base, 2. Coextrusion box, 3. Extrusion structure, 301. Inner connecting pipe, 302. Reducing pipe, 303. Outer connecting pipe, 304. Inner arc plate, 305. Central arc plate, 306. Outer arc plate, 4. Material extrusion assembly, 401. Extrusion pipe, 402. Pushing screw, 403. Material blocking plate, 404. Gear one, 405. Gear two, 406. Gear three, 5. Square flange, 6. Ear plate, 7. Column, 8. Feeding port, 9. Cylinder, 10. Control button, 11. Servo motor, 12. Reducer, 13. Box body. Specific embodiments

[0017] The present invention will be further described below with reference to the accompanying drawings: Referring to the attached Figures 1-6 : In this embodiment, a coextrusion system for processing high-barrier environmentally friendly ultra-clear PVB intermediate film includes a bottom plate 1, a coextrusion box 2 and a cylinder 9. The front sides of the upper ends of multiple bases 1 are fixedly connected with cylinders 9. The rear sides of the upper ends of the bases 1 are provided with a box body 13, a servo motor 11 and a reducer 12. The model of the servo motor 11 can be determined according to specific usage requirements. The upper rear side of the outer wall of the cylinder 9 is fixedly communicated with a feeding port 8. The inner walls of the cylinder 9 and the box body 13 are provided with a material extrusion assembly 4. The outer wall of the coextrusion box 2 is provided with an extrusion structure 3. The upper right side of the outer wall of the box body 13 is provided with a control button 10. The control button 10 is used to control the start and stop process of the specific motor structure. The output shaft of the servo motor 11 is fixedly connected with the input shaft of the reducer 12. The outer wall of the cylinder 2 is fixedly connected with multiple ear plates 6. The lower ends of the ear plates 6 are fixedly connected with columns 7. The front side of the outer wall of the coextrusion box 2 is fixedly connected with a square flange 5. The square flange 5 facilitates the connection of the coextrusion box 2 with an external PVB intermediate film mold.

[0018] Referring to the attached Figures 1-6: In this embodiment, the material extrusion assembly 4 includes an extrusion tube 401, a pusher screw 402, and a baffle plate 403. The rear end of the pusher screw 402 is rotatably connected to the box body 13 through a sealing bearing. A first gear 404 is fixedly connected to the rear end of the pusher screw 402. At the same time, the pusher screw 402 can drive the baffle plate 403 to rotate through a gear set. The rotating shafts of the plurality of baffle plates 403 are respectively rotatably connected to the inner walls on both sides of the feed inlet 8. The baffle plate 403 continuously rotates and flips, driving the granular materials inside the feed inlet 8 to be continuously agitated, reducing the situation where the materials at the feed inlet 8 form hard blocks or get stuck in a position, resulting in blockage. A third gear 406 is fixedly connected to the rear end of the rotating shaft of the baffle plate 403. The outer wall of one side of the third gear 406 meshes with the second gear 405, and the outer wall of the second gear 405 meshes with the first gear 404. The rear side of the rotating shaft of the first gear 404 is fixedly connected to the output shaft of the speed reducer 12. The extrusion tube 401 is fixedly connected and communicated to the front end of the cylinder body 9.

[0019] Refer to the appendix Figures 1-6 : In this embodiment, the extrusion structure 3 includes a central arc plate 305, an inner arc plate 304, and an outer arc plate 306. The outer arc plates 306 are processed on the left and right sides of the inner wall of the co-extrusion box 2. A plurality of inner arc plates 304 are fixedly connected to both sides of the center of the inner wall of the co-extrusion box 2. The central arc plate 305 is fixedly connected to the center of the inner wall of the co-extrusion box 2. The arrangement of the arc-shaped surfaces on the outer walls of the central arc plate 305, the inner arc plate 304, and the outer arc plate 306 makes the surfaces of the corresponding extruded flat sheet structures also present corresponding arc-shaped surfaces. An outer connecting pipe 303 is fixedly connected to the area between the central arc plate 305 and the inner arc plate 304. An inner connecting pipe 301 is fixedly connected to the area between the inner arc plate 304 and the outer arc plate 306. The rear ends of both the inner connecting pipe 301 and the outer connecting pipe 303 are fixedly connected and communicated to a variable diameter pipe 302. The inclination states of the central arc plate 305, the inner arc plate 304, and the outer arc plate 306 gradually increase in the front-rear direction. The central arc plate 305, the inner arc plate 304, and the outer arc plate 306 are all distributed in a state of being narrower in the front and wider in the rear. The rear outer wall of the variable diameter pipe 303 is fixedly connected and communicated to the extrusion tube 401 through a circular flange.

[0020] Working principle: When this co - extrusion system for processing high - barrier environmentally friendly ultra - clear PVB interlayer film is needed for use, assemble the overall equipment between the corresponding flanges as shown in the figure. Connect the front side of the co - extrusion box 2 to the external extrusion die through the square flange 5. After assembly, sequentially put various raw material particles of ultra - clear PVB interlayer film to be processed in layers into the four feeding ports 8 (specifically, four materials can be selected according to needs to finally process into high - barrier environmentally friendly ultra - clear PVB interlayer film). After putting them in, start the servo motor 11, so that the output shaft of the servo motor 11 can drive the feeding screw 402 to rotate, enabling the feeding screw 402 to convey the granular raw materials at the feeding port 8 forward, and be heated and melted in the second half of the cylinder 9 by the heating structure inside the cylinder 9 (this is prior art, and the heating method can be determined according to requirements to meet the requirements, specifically, heating can be achieved by using a heating plate and a temperature controller). The granular material is melted into molten polyvinyl butyral (i.e., PVB), and is continuously pushed forward by the material behind, and finally discharged from the extrusion pipe 401 below; Meanwhile, the extrusion pipes 401 at multiple places convey the molten raw materials into the co - extrusion box 2 through the inner connecting pipe 301 and the outer connecting pipe 303, and are further compressed under the extrusion of the reducing pipe 302 during the conveying process. After reaching the co - extrusion box 2 at the conveyor belt, the central arc plate 305, the inner arc plate 304, and the outer arc plate 306 are all distributed in a state of being narrow in the front and wide in the rear, enabling the molten raw materials here to be further compressed and initially cooled and formed, and extruding the molten raw materials into flat sheets due to the narrow - front feature. At the same time, due to the setting of the arc - shaped outer surfaces of the central arc plate 305, the inner arc plate 304, and the outer arc plate 306, the surfaces of the corresponding extruded flat - sheet structures also present corresponding arc - shaped surfaces. After being conveyed to the external extrusion die through the square flange 5, the flat - sheet structures between layers can be better bonded and fixed, and finally, the ultra - clear PVB interlayer film extrusion processing is achieved at the external extrusion die; Compared with the traditional technology, its design of extruding multi - layer pure - plane PVB interlayer film easily leads to problems such as crosstalk during the bonding and fixing between layers, affecting the final forming effect. However, in this case, through the setting of the arc - shaped outer surfaces of the central arc plate 305, the inner arc plate 304, and the outer arc plate 306, the surfaces of the corresponding extruded flat - sheet structures also present corresponding arc - shaped surfaces. After being conveyed to the external extrusion die through the square flange 5, the flat - sheet structures between layers can be better bonded and fixed, and finally, the ultra - clear PVB interlayer film extrusion processing is achieved at the external extrusion die, effectively avoiding the problems that the design of extruding multi - layer pure - plane PVB interlayer film easily leads to crosstalk during the bonding and fixing between layers, affecting the final forming effect.

[0021] During the process of the specific servo motor 11 driving the feeding screw 402 to rotate, the first gear 404 at the end of the feeding screw 402 also rotates accordingly. At the same time, the outer wall of the first gear 404 can also drive two third gears 406 to rotate synchronously and in opposite directions through the second gear 405, thereby continuously rotating and flipping the baffle plate 403. Compared with the prior art, when adding materials at the feeding port, most of the granular materials are directly stacked inside the feeding port, and it is easy to have the problem of granular material clogging the feeding port during specific use. Therefore, in this case, the baffle plate 403 is designed. While the feeding screw 402 rotates, through the cooperation of the gear set, the baffle plate 403 continuously rotates and flips, driving the granular materials inside the feeding port 8 to be continuously stirred, reducing the situation where the materials at the feeding port 8 form hard blocks or jam at certain positions, effectively avoiding the problem that most of the granular materials are directly stacked inside the feeding port and it is easy to have the problem of granular material clogging the feeding port during specific use.

[0022] After the overall structure is used, the connection at the flange can be periodically released to clean the inner walls of each pipeline regularly to ensure the cleanliness of the overall equipment. After cleaning, it can be used for the next time.

[0023] Although the present invention has been illustrated and described by referring to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details can be made within the scope of the claims.

Claims

1. A co-extrusion system for processing high-barrier environmentally friendly ultra-clear PVB interlayer film, comprising a bottom plate (1), a co-extrusion box (2) and a cylinder body (9). The front sides of the upper ends of a plurality of the base plates (1) are fixedly connected with the cylinder body (9). It is characterized in that: A box body (13), a servo motor (11) and a speed reducer (12) are installed at the rear side of the upper end of the base (1). A feed inlet (8) is fixedly communicated with the upper rear side of the outer wall of the cylinder body (9). A material extrusion assembly (4) is installed on the inner walls of the cylinder body (9) and the box body (13). An extrusion structure (3) is installed on the outer wall of the co-extrusion box (2).

2. The co-extrusion system for processing high-barrier environmentally friendly ultra-clear PVB interlayer film according to claim 1, characterized in that: The material extrusion assembly (4) includes an extrusion pipe (401), a feed screw (402) and a baffle plate (403). The rear end of the feed screw (402) is rotationally connected to the box body (13) through a sealing bearing. A first gear (404) is fixedly connected to the rear end of the feed screw (402). The rotating shafts of a plurality of the baffle plates (403) are respectively rotationally connected to the inner walls on both sides of the feed inlet (8). A third gear (406) is fixedly connected to the rear end of the rotating shaft of the baffle plate (403). The outer wall of one of the third gears (406) is meshed with a second gear (405). The outer wall of the second gear (405) is meshed with the first gear (404). The rear side of the rotating shaft of the first gear (404) is fixedly connected to the output shaft of the speed reducer (12). The extrusion pipe (401) is fixedly communicated with the front end of the cylinder body (9).

3. The coextrusion system for processing high-barrier environmentally friendly ultra-clear PVB interlayer film according to claim 1, characterized in that: A control button (10) is installed above the upper right side of the outer wall of the box body (13). The output shaft of the servo motor (11) is fixedly connected to the input shaft of the speed reducer (12).

4. The co-extrusion system for processing high-barrier environmentally friendly ultra-clear PVB interlayer film according to claim 1, characterized in that: A plurality of ear plates (6) are fixedly connected to the outer wall of the cylinder body (2). A column (7) is fixedly connected to the lower end of the ear plate (6).

5. The coextrusion system for processing high-barrier environmentally friendly ultra-clear PVB interlayer film according to claim 1, wherein: The extrusion structure (3) includes a central arc plate (305), an inner arc plate (304) and an outer arc plate (306). The outer arc plates (306) are processed on the left and right sides of the inner wall of the co-extrusion box (2). A plurality of the inner arc plates (304) are fixedly connected to both sides of the center of the inner wall of the co-extrusion box (2). The central arc plate (305) is fixedly connected to the center of the inner wall of the co-extrusion box (2). An outer connecting pipe (303) is fixedly connected to the area between the central arc plate (305) and the inner arc plate (304). An inner connecting pipe (301) is fixedly connected to the area between the inner arc plate (304) and the outer arc plate (306). The rear ends of both the inner connecting pipe (301) and the outer connecting pipe (303) are fixedly communicated with a variable diameter pipe (302).

6. The co-extrusion system for processing high-barrier environmental protection ultra-clear PVB interlayer film according to claim 6, wherein: The inclination states of the central arc plate (305), the inner arc plate (304) and the outer arc plate (306) gradually increase in the front-rear direction.

7. The co-extrusion system for processing high-barrier environmentally friendly ultra-clear PVB interlayer film according to claim 6, wherein: The rear outer wall of the variable diameter pipe (303) is fixedly communicated with the extrusion pipe (401) through a circular flange.

8. The co-extrusion system for processing high-barrier environmentally friendly ultra-clear PVB interlayer film according to claim 1, characterized in that: A square flange (5) is fixedly connected to the front side of the outer wall of the co-extrusion box (2).

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