Three-layer co-extrusion equipment

Abstract

The invention relates to three-layer co-extrusion equipment, and relates to the technical field of membrane material processing equipment. The device comprises a film material extrusion unit, a film blowing machine body and a film forming machine which are connected in sequence, and a winding device arranged at an outlet of the film forming machine, the film material extrusion unit is used for stirring raw materials of all layers of film materials and conveying the raw materials to the film blowing machine body, and the film blowing machine body is used for blowing films and finally conveying the films into the film forming machine so as to press the three layers of film materials. And the finished product membrane material is cut by the edge cutting device to form a specific width, and is finally wound by the winding device. In the edge cutting process, the edge holes, located in the edge cavities, of the separation rollers are in the air suction state, then the edges of the membrane materials can be more stably adsorbed to the separation rollers, in the subsequent membrane material rolling process, the separation effect of waste edges and finished membrane materials can be better, and adhesion or edge breaking is not likely to happen.

Description

Technical Field

[0001] The present application relates to the field of film material processing equipment, and in particular to a three-layer co-extrusion equipment. Background Art

[0002] Three-layer co-extrusion equipment is a kind of equipment for producing multi-layer film materials. By controlling the performance of different layers of film materials, the final multi-layer film product can meet the performance requirements of multi-layer materials in different industries.

[0003] The existing Chinese patent with publication number CN112454851A discloses a three-layer co-extrusion blown film machine that is easy to reduce noise. The machine includes a chassis with a heating mixing box fixed inside the chassis. After the three-layer film material is extruded through the heating mixing box, the three-layer film material is produced through a film blowing machine body and a film forming machine, and finally cut into a specific length by a cutting blade and rolled up.

[0004] The above-mentioned related technologies have the following defects: they can only finely control the length of the film material, but the width of the film material cannot be finely controlled, and defects are prone to appear on the edges during the film production process. Therefore, a three-layer co-extrusion device is needed that can not only process edge defects but also finely control the width of the film material. Summary of the invention

[0005] In order to process the edge defects of the film material while finely controlling the width of the film material, the present application provides a three-layer co-extrusion device.

[0006] The three-layer co-extrusion equipment provided in this application adopts the following technical solution:

[0007] A three-layer co-extrusion device comprises a film material extrusion unit, a film blowing machine body and a film forming machine which are connected in sequence, and a winding device arranged at the outlet of the film forming machine, wherein the film material extrusion unit comprises a middle layer extruder and surface layer extruders located on both sides of the middle layer extruder, a trimming device is arranged between the film forming machine and the winding device, the trimming device comprises a trimming frame and a separation roller and a cutter arranged on the trimming frame, the blade of the cutter abuts against the separation roller, a separation chamber is arranged inside the separation roller, two partitions are arranged inside the separation chamber to separate the interior of the separation chamber into a middle chamber and side chambers on both sides of the middle chamber, the partition is also provided with a reserved hole and a fan for pumping air from the side chamber to the middle chamber is arranged at the reserved hole, the middle chamber side wall is penetrated by a middle hole, and the side chamber side wall is penetrated by a side hole.

[0008] By adopting the above technical scheme, the film extruder unit is used to stir the raw materials of each layer of film material and transport the raw materials to the film blowing machine body, the film blowing machine body is used to blow the film and finally transport it to the film forming machine to press the three layers of film material, and the final finished film material is formed into a specific width after the edge material is trimmed by the trimming device and finally wound by the winding device.

[0009] During the trimming process, the edge holes of the separation roller located at the edge cavity are in a suction state, so that the edge of the membrane can be more stably adsorbed on the separation roller. In the subsequent film winding process, the waste edge and the finished film can be better separated, and it is not easy to stick or break.

[0010] Optionally, the middle layer extruder includes a body, a stirring shaft rotatably arranged with the body, and a stirring drive member connected with the body for driving the stirring shaft to rotate, and the body is provided with a recovery port for edge materials to enter.

[0011] By adopting the above technical solution, the cut edge materials can re-enter the middle layer extruder from the recycling port, and then be melted together with the raw materials for production, which is more environmentally friendly.

[0012] Optionally, a recovery pipe for the edge material to enter is rotatably provided at the recovery port, and the fuselage is provided with a limiting mechanism for limiting the rotation angle of the recovery pipe.

[0013] By adopting the above technical solution, adjusting the entry angle of the edge material is similar to adjusting the angle at which the edge material is wound around the surface of the columnar object, and in this way, the speed at which the edge material enters the shell can be adjusted.

[0014] Optionally, a ball head is provided at the end of the recovery pipe, and a ball socket is provided at the recovery port. The ball head and the ball socket are rotatably matched, a limiting hole is provided on the side wall of the ball socket, a limiting rod is threadedly connected to the limiting hole, and the end of the limiting rod is against the ball head.

[0015] By adopting the above technical solution, the angle of the recovery tube can be adjusted by loosening the limit rod, and the angle of the recovery tube can be locked by tightening the limit rod, which is more convenient to operate. In addition, the angle adjustment of this rotation method is more flexible, so that the adjustment can be more detailed.

[0016] Optionally, a traction hook is provided on the stirring shaft near the recovery port.

[0017] By adopting the above technical solution, the traction hook can be used to hook the edge material during the rotation of the stirring shaft, thereby assisting the edge material to enter the shell body for recycling.

[0018] Optionally, an air duct is provided inside the separation chamber, the two ends of the air duct extend to the inside of the two side chambers respectively and the air duct is threadedly connected to the reserved holes, the middle part of the air duct is located inside the middle chamber and is connected to the fan, the end opening of the separation stick is connected to the separation chamber and the end of the separation stick is detachably provided with an end cover.

[0019] By adopting the above technical solution, the position of the partition can be adjusted by rotating the partition, so that the air suction / air outlet state of the side holes and the hollow can be flexibly adjusted, and it is more convenient to flexibly adjust according to the position of the cutting edge.

[0020] Optionally, an elastic ring sheet is provided at the periphery of the partition, a gap exists between the periphery of the partition and the inner wall of the separation chamber, and the elastic ring sheet abuts against the inner wall of the separation chamber.

[0021] By adopting the above technical solution, the elastic ring sheet can more effectively fill the gap between the partition and the inner wall of the separation chamber. In addition, when the suction / air outlet needs to be adjusted at a local position, the local elastic ring sheet can be bent, and the elastic ring sheet's ability to deform arbitrarily and finally tighten can be used to perform local fine adjustment.

[0022] Optionally, regulating valves are provided in the middle hole and the side hole, and the regulating valve includes a shell, a fixed valve plate fixedly connected to the shell, and a movable valve plate rotatably connected to the shell. The fixed valve plate and the movable valve plate are fitted together and both are penetrated by regulating holes.

[0023] By adopting the above technical solution, the overlap degree between the adjustment hole on the fixed valve plate and the adjustment hole on the movable valve plate can be adjusted by rotating the movable valve plate, thereby realizing the adjustment of the cross-sectional area through which air can flow. After the adjustment is completed, the movable valve plate maintains a stable angle under the action of the static friction force between the movable valve plate and the fixed valve plate. The structure is simple and the operation is convenient.

[0024] Optionally, a coil is wound around the outer side of the body of the surface layer extruder for the edge material to pass through.

[0025] By adopting the above technical solution, the edge material can be preheated while passing through the coil, thereby improving the efficiency of finally entering the middle layer extruder for recycling with the raw material melt.

[0026] Optionally, the coil is a corrugated tube, one end of the coil is fixedly arranged on the body of the dough layer extruder and the other end is slidably connected to the body of the dough layer extruder, and the body of the dough layer extruder is provided with a locking mechanism for limiting the end position of the coil.

[0027] By adopting the above technical solution, the number of turns of the coil on the outer side of the body of the surface layer extruder can be adjusted during the recycling process of the scraps, thereby adjusting the preheating degree of the scraps before recycling.

[0028] In summary, the present application includes at least one of the following beneficial effects:

[0029] 1. The film extruder unit is used to stir the raw materials of each layer of film material and transport the raw materials to the film blowing machine. The film blowing machine is used to blow the film and finally transport it to the film forming machine to press the three layers of film material. The finished film material is finally cut by the trimming device to form a specific width and finally rolled up by the winding device. During the trimming process, the side hole of the separation roller located at the side cavity is in the suction state, so that the edge of the film material can be more stably adsorbed on the separation roller. In the subsequent film winding process, the waste edge and the finished film material can be separated better, and it is not easy to stick or break the edge.

[0030] 2. A recycling pipe for the edge material to enter is rotatably arranged at the recycling port, and a limit mechanism for limiting the rotation angle of the recycling pipe is arranged on the shell. Adjusting the entry angle of the edge material is similar to adjusting the angle of the edge material wrapped around the surface of the columnar object, and in this way, the speed at which the edge material enters the shell can be adjusted.

[0031] 3. A coil is wound around the outside of the surface layer extruder for the edge material to pass through. The edge material can be preheated during the process of passing through the coil, thereby improving the efficiency of the final entry into the middle layer extruder for melting and reuse with the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0033] Figure 2 This is a structural schematic diagram for illustrating the connection relationship between the coil and the surface layer extruder in the embodiment of the present application;

[0034] Figure 3 This is a structural schematic diagram for reflecting the connection relationship between the recovery pipe and the middle layer extruder in the embodiment of the present application;

[0035] Figure 4 This is a cross-sectional schematic diagram used to illustrate the connection relationship between the recovery pipe and the middle layer extruder in the embodiment of the present application;

[0036] Figure 5 This is a structural schematic diagram for illustrating the connection relationship between the separation roller and the cutter in the embodiment of the present application;

[0037] Figure 6 This is a cross-sectional schematic diagram for illustrating the connection relationship between the partition and the separation rod in the embodiment of the present application;

[0038] Figure 7 It is a disassembly schematic diagram used to reflect the specific structure of the regulating valve in the embodiment of the present application.

[0039] In the figure:

[0040] 1. Film extrusion unit; 11. Middle layer extruder; 12. Surface layer extruder; 13. Feed inlet; 14. Recovery inlet; 15. Body; 16. Stirring shaft; 17. Dragon; 18. Stirring drive; 19. Towing hook;

[0041] 2. Film blowing machine body;

[0042] 3. Film forming machine;

[0043] 4. trimming device; 41. trimming frame; 42. separation stick; 420. separation chamber; 421. middle chamber; 4210. middle hole; 422. side chamber; 4220. side hole; 423. end cover; 43. cutter; 44. air duct; 45. fan;

[0044] 5. Winding device;

[0045] 6. Coil; 61. Sliding block; 62. Sliding rail; 63. Recovery tube; 64. Limiting mechanism; 641. Ball head; 642. Ball socket; 643. Limiting rod; 644. Limiting hole;

[0046] 7. partition; 71. elastic ring piece; 710. reserved hole;

[0047] 8. regulating valve; 81. housing; 82. fixed valve plate; 83. movable valve plate; 84. regulating hole. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1-7 This application is described in further detail.

[0049] The present application embodiment discloses a three-layer co-extrusion device. Figure 1 The three-layer co-extrusion equipment includes a film extrusion unit 1, a film blowing machine 2, a film forming machine 3, a trimming device 4 and a winding device 5 which are arranged in sequence. The film extrusion unit 1 is used to stir the raw materials of each layer of film material and convey the raw materials to the film blowing machine 2. The film blowing machine 2 is used to blow the film and finally convey it to the film forming machine 3 to press the three layers of film material. The finished film material is finally formed into a specific width after the trimming device 4 trims the edge material and finally is wound up by the winding device 5.

[0050] Reference Figure 1 The film extruder unit 1 includes a middle layer extruder 11 and surface layer extruders 12 located on both sides of the middle layer extruder 11, so as to mix and transport the middle layer and the surface layer respectively. A coil 6 is wound around the outer side of the body 15 of the surface layer extruder 12 on the side close to the trimming device 4. The coil 6 is a corrugated tube that is bendable and retractable so that the edge material can pass through and preheat the edge material. The bottom of the coil 6 is fixedly arranged with the body 15 of the surface layer extruder 12.

[0051] Reference Figure 1 and Figure 2The top of the coil 6 is fixedly connected with a slider 61, and the top of the body 15 of the surface layer extruder 12 is provided with a slide rail 62. The slider 61 and the slide rail 62 are slidably matched and locked by bolts, thereby serving as a locking mechanism to limit the top position of the coil 6. During the recycling process of the scraps, the number of turns of the coil 6 on the outside of the body 15 of the surface layer extruder 12 can be adjusted to adjust the preheating degree of the scraps before recycling.

[0052] Reference Figure 3 and Figure 4 , the middle layer extruder 11 and the surface layer extruder 12 are both provided with a feed port 13, and the middle layer extruder 11 has an additional recovery port 14 for reusing the preheated waste edges and scraps. Specifically: the middle layer extruder 11 includes a cylindrical body 15, and a stirring shaft 16 and a dragon 17 are rotatably arranged inside the body 15 through a bearing. A stirring drive 18 is fixed to the outside of the top cover of the body 15. The stirring drive 18 is a motor for driving the stirring shaft 16 to rotate. The recovery port 14 for scraps to be recovered is opened at the top of the side wall of the body 15. A traction hook 19 is also welded and fixed to the stirring shaft 16 near the recovery port 14. During the rotation of the stirring shaft 16, the scraps at the recovery port 14 can be hooked, driving the scraps to enter the shell 81, and reducing the probability of scraps blocking the recovery port 14.

[0053] Reference Figure 4 A recovery pipe 63 is rotatably provided at the recovery port 14. The angle at which the edge material enters the shell 81 from the recovery pipe 63 can be adjusted by the angle of the recovery pipe 63. The interior of the fuselage 15 is in a state of continuous rotation under the action of the stirring shaft 16 and the dragon 17. Adjusting the entry angle of the edge material is similar to adjusting the angle at which the edge material is wrapped around the surface of the columnar object. In this way, the speed at which the edge material enters the shell 81 can be adjusted.

[0054] Reference Figure 4 The angle of the recovery pipe 63 is locked by a limiting mechanism 64. Specifically, the limiting mechanism 64 is as follows: a ball head 641 is welded and fixed at the end of the recovery pipe 63, and a ball socket 642 is prefabricated at the recovery port 14. The ball head 641 and the ball socket 642 are rotatably matched to realize the rotation of the recovery pipe 63. A limiting hole 644 is provided through the side wall of the ball socket 642. A limiting rod 643 is connected to the inner thread of the limiting hole 644. The end of the limiting rod 643 abuts against the ball head 641 to lock the current angle of the recovery pipe 63.

[0055] Reference Figure 5 The edge cutting device 4 includes an edge cutting frame 41, a separation rod 42 and a cutter 43 arranged on the edge cutting frame 41. The edge cutting frame 41 is slidably provided with a knife holder and is locked by bolts. The cutter 43 is slidably connected to the inside of the knife holder and is supported by a spring to ensure that the blade of the cutter 43 is against the separation rod 42, so that the edge material is cut when the film material passes.

[0056] Reference Figure 6 , a separation chamber 420 is arranged inside the separation rod 42, and two partitions 7 are arranged inside the separation chamber 420. An elastic ring sheet 71 is glued and fixed to the periphery of the partition 7. There is a gap between the periphery of the partition 7 and the inner wall of the separation chamber 420, and the elastic ring sheet 71 covers the aforementioned gap and the outer edge of the elastic ring sheet 71 abuts against the inner wall of the separation chamber 420. The partition 7 and the elastic ring sheet 71 divide the interior of the separation chamber 420 into a middle chamber 421 and side chambers 422 on both sides of the middle chamber 421. A middle hole 4210 is provided through the side wall of the middle chamber 421, and side holes 4220 are provided through the side wall of the side chamber 422. In terms of size and distribution density, the diameter of the side holes 4220 is smaller and the distribution is denser.

[0057] An air duct 44 is provided inside the separation chamber 420. The air duct 44 is coaxially arranged with the separation roller 42 and fixed in the separation chamber 420 by a bracket. A fan 45 is fixedly provided in the middle of the air duct 44 by bolts and is located within the range of the middle chamber 421. The two ends of the air duct 44 extend to the range of the side chambers 422 on both sides respectively and the ends of the air duct 44 are threadedly connected with the reserved holes 710 of the partition 7, so that the position of the partition 7 can be adjusted by rotating the partition 7. The fan 45 is used to cooperate with the air duct 44 to draw the air in the side chamber 422 into the middle chamber 421, so that the side hole 4220 of the separation roller 42 located at the side chamber 422 is in an air suction state, and then the edge of the film material can be more stably adsorbed on the separation roller 42, so that the waste edge and the film material can be separated better in the subsequent film material winding process. Even if there may be a state of partial adhesion of the edge material after cutting, the waste edge can still be stably adsorbed on the separation roller 42 by negative pressure, thereby reducing adhesion. The end of the separation rod 42 is open and is installed with an end cover 423 by bolts. The end cover 423 can be opened to facilitate access to the interior of the separation chamber 420 for operation.

[0058] Reference Figure 7 , the middle hole 4210 and the side hole 4220 are both provided with regulating valves 8, and the regulating valves 8 are used to adjust the actual cross-sectional area of ​​the middle hole 4210 and the side hole 4220 that can be used for air circulation. The regulating valve 8 includes a cylindrical shell 81, and the shell 81 is fixed to the inside of the middle hole 4210 and the side hole 4220 by gluing. A fixed valve plate 82 is fixedly provided inside the shell 81, and a movable valve plate 83 is rotatably provided. The fixed valve plate 82 and the movable valve plate 83 are both circular plates and fit each other. The fixed valve plate 82 and the movable valve plate 83 are both penetrated with regulating holes 84. By rotating the movable valve plate 83, the overlapping degree of the regulating holes 84 on the fixed valve plate 82 and the regulating holes 84 on the movable valve plate 83 can be adjusted, thereby realizing the adjustment of the cross-sectional area that can be used for air circulation. After the adjustment is completed, the movable valve plate 83 maintains a stable angle under the action of the static friction between the fixed valve plate 82 and the movable valve plate 83.

[0059] The implementation principle of a three-layer co-extrusion device in an embodiment of the present application is: the film extrusion unit 1 is used to stir the raw materials of each layer of film material and convey the raw materials to the film blowing machine body 2, the film blowing machine body 2 is used to blow the film and finally convey it to the film forming machine 3 to press the three layers of film material, and the final finished film material is formed into a specific width after the edge material is trimmed by the trimming device 4 and finally wound by the winding device 5.

[0060] During the trimming process, the side hole 4220 of the separation roller 42 located at the side cavity 422 is in a suction state, so that the edge of the film can be more stably adsorbed on the separation roller 42. In the subsequent film winding process, the waste edge and the finished film can be better separated and not easily adhered or broken.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A three-layer co-extrusion device, comprising a film extruder unit (1), a film blowing machine (2) and a film forming machine (3) connected in sequence, and a winding device (5) arranged at the outlet of the film forming machine (3), characterized in that: The film extruder unit (1) comprises a middle layer extruder (11) and surface layer extruders (12) located on both sides of the middle layer extruder (11); a trimming device (4) is arranged between the film forming machine (3) and the winding device (5); the trimming device (4) comprises a trimming frame (41) and a separation roller (42) and a cutter (43) arranged on the trimming frame (41); the blade of the cutter (43) abuts against the separation roller (42); a separation chamber (420) is arranged inside the separation roller (42); Two partitions (7) are arranged inside the cavity (420) to divide the interior of the separation cavity (420) into a middle cavity (421) and side cavities (422) on both sides of the middle cavity (421); the partition (7) is also provided with a reserved hole (710), and a fan (45) for pumping air from the side cavity (422) to the middle cavity (421) is arranged at the reserved hole (710); the middle cavity (421) side wall is penetrated by a middle hole (4210), and the side cavity (422) side wall is penetrated by a side hole (4220).

2. A three-layer co-extrusion device according to claim 1, characterized in that: The middle layer extruder (11) comprises a body (15), a stirring shaft (16) rotatably arranged with the body (15), and a stirring driving member (18) connected with the body (15) for driving the stirring shaft (16) to rotate. The body (15) is provided with a recovery port (14) for edge material to enter.

3. A three-layer co-extrusion device according to claim 2, characterized in that: A recovery pipe (63) for the edge material to enter is rotatably provided at the recovery port (14), and a limiting mechanism (64) for limiting the rotation angle of the recovery pipe (63) is provided on the machine body (15).

4. A three-layer co-extrusion device according to claim 3, characterized in that: A ball head (641) is provided at the end of the recovery pipe (63), and a ball socket (642) is provided at the recovery port (14). The ball head (641) and the ball socket (642) are rotatably matched, and a limiting hole (644) is provided on the side wall of the ball socket (642). The limiting hole (644) is internally threadedly connected to a limiting rod (643), and the end of the limiting rod (643) is abutted against the ball head (641).

5. A three-layer co-extrusion device according to claim 2, characterized in that: The stirring shaft (16) is provided with a traction hook (19) near the recovery port (14).

6. A three-layer co-extrusion device according to claim 1, characterized in that: An air duct (44) is arranged inside the separation chamber (420), the two ends of the air duct (44) respectively extend into the interior of the two side chambers (422) and the air duct (44) is threadedly connected to the reserved hole (710), the middle part of the air duct (44) is located inside the middle chamber (421) and is connected to the fan (45), the end opening of the separation rod (42) is connected to the separation chamber (420) and the end of the separation rod (42) is detachably provided with an end cover (423).

7. A three-layer co-extrusion device according to claim 1, characterized in that: An elastic ring sheet (71) is provided at the periphery of the partition (7), a gap exists between the periphery of the partition (7) and the inner wall of the separation chamber (420), and the elastic ring sheet (71) abuts against the inner wall of the separation chamber (420).

8. A three-layer co-extrusion device according to claim 1, characterized in that: A regulating valve (8) is disposed in each of the central hole (4210) and the side hole (4220). The regulating valve (8) comprises a shell (81), a fixed valve plate (82) fixedly connected to the shell (81), and a movable valve plate (83) rotatably connected to the shell (81). The fixed valve plate (82) and the movable valve plate (83) are closely fitted and both are penetrated by regulating holes (84).

9. A three-layer co-extrusion device according to claim 2, characterized in that: The outer side of the body (15) of the surface layer extruder (12) is provided with a coil (6) for the edge material to pass through.

10. A three-layer co-extrusion device according to claim 9, characterized in that: The coil (6) is a corrugated tube, one end of the coil (6) is fixedly arranged on the body (15) of the surface layer extruder (12), and the other end is slidably connected to the body (15) of the surface layer extruder (12), and the body (15) of the surface layer extruder (12) is provided with a locking mechanism for limiting the end position of the coil (6).

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