Nine-layer co-extrusion film extrusion device

Abstract

The utility model discloses a nine-layer co-extrusion film extrusion device, which relates to the technical field of multilayer film production and comprises a rack, a fixing frame is fixedly arranged in the middle of the upper surface of the rack, an extrusion die is fixedly arranged at the top end of the fixing frame, and sliding chutes with strip-shaped structures are arranged at two ends of the outer side surface of the fixing frame in a penetrating manner. A sliding rod is arranged in the sliding groove in a penetrating mode, and a pressing roller is fixedly arranged in the middle of the sliding rod. According to the utility model, the fixed frame is arranged above the rack, the extrusion die is arranged above the fixed frame, the extrusion die can realize synchronous extrusion of nine layers of co-extrusion films, the compression rollers and the movable roller are arranged in the fixed frame, and the movable roller can move towards the middle of the two compression rollers, so that the extruded films are compressed; and the pressure can be controlled by adjusting the position of the movable roller, so that the forming effect of the nine-layer co-extrusion film is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-layer film production, in particular to a nine-layer co-extrusion film extrusion device. Background Art

[0002] In the process of film processing, one raw material is extruded onto another film that has been made, or different types of films that have been made are bonded together to form a multilayer film. This product is called a composite film. Most of the materials of composite films are plastics, but paper, metal foil (usually aluminum) or fabric can also be used. The basic requirement of composite films is that there must be good adhesion between layers to ensure the overall mechanical properties of the package. In addition, composite films are mostly used for food packaging. Adhesives must be used in the processing of composite films, and the selection of solvents and bonding processes must meet the corresponding hygiene standards. Co-extruded film has most of the characteristics of composite films, but there is one difference, that is, all layers of co-extruded film are extruded at the same time, so there will be no other non-plastic materials such as aluminum foil and paper. The combination of its product materials is relatively small, and the scope of application is also small, but because the layers are hot-melt bonded without adhesives, the hygienic safety of co-extruded film for food packaging is relatively reliable.

[0003] In the existing production process, the nine-layer co-extruded film is extruded by setting up two extrusion rollers. Therefore, the extrusion force between the two extrusion rollers plays a key role in the preparation of the nine-layer co-extruded film, and there is still a large amount of heat that needs to be volatilized in the film after extrusion. In the existing production process, it is naturally cooled and formed through a longer production line, and the film after production has a larger shape when it is just formed. Under the pulling force of the long production line and the winding roller, the tension of the front end film has a certain difference, which can easily lead to differences in the film thickness during production and winding, affecting the subsequent performance.

[0004] For example, a thin film multi-layer co-extrusion device with publication number CN217346614U. Its technical solution includes: a frame body composed of an upper circular frame and fixed frame columns fixed at the four corners of the upper circular frame, a multi-layer thin film co-extrusion die head for film making is fixed to the lower side of the upper circular frame through two sets of mounting plates, an adjustment and pressing mechanism located at the lower side of the multi-layer thin film co-extrusion die head is fixed to the four fixed frame columns, and a tension adjustment mechanism fixed to the four fixed frame columns is arranged at the lower side of the adjustment and pressing mechanism. The utility model can adjust the conveying tension and accelerate the cooling speed during the multi-layer production of thin films.

[0005] In practical applications, the above technical solution has the problem of uncontrollable pressure during the co-extrusion film forming process, making it difficult to ensure the forming quality of the co-extrusion film.

[0006] Therefore, it is necessary to invent a nine-layer co-extruded film extrusion device to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a nine-layer co-extrusion film extrusion device to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nine-layer co-extrusion film extrusion device, comprising a frame, a fixed frame is fixedly arranged in the middle of the upper surface of the frame, an extrusion die is fixedly arranged on the top of the fixed frame, both ends of the outer side surface of the fixed frame are penetrated by a slide groove with a strip structure, a slide rod is penetrated inside the slide groove, a pressure roller is fixedly arranged in the middle of the slide rod, a positioning frame is fixedly arranged in the middle of the outer side of the fixed frame, a movable rod is penetrated inside the positioning frame, a movable roller is fixedly arranged in the middle of the movable rod, a transmission plate is movably arranged at one end of the movable rod through a pin shaft, and the transmission plate is arranged in a "T" shape structure, one end of the transmission plate is movably arranged with two connecting arms through a pin shaft, and the two connecting arms are movably connected to one end of two slide rods through the pin shaft respectively.

[0009] Preferably, a movable frame is movably provided at one end of the movable rod through a pin shaft, two positioning sleeves are sleeved in the middle of the movable frame, and the positioning sleeves are fixedly provided on the outer side of the fixed frame.

[0010] Preferably, a thread groove is provided through the middle of the movable frame, a threaded rod is provided through the inside of the thread groove, and the threaded rod is movably provided in the middle of the fixed frame through a bearing.

[0011] Preferably, an air guide cover is fixedly provided at the middle portion of the outer side of the fixing frame, and cooling fans are fixedly provided at both ends of the outer side wall of the air guide cover.

[0012] Preferably, an air outlet nozzle is fixedly provided at the inner middle portion of the air guide cover, and the air outlet nozzle is arranged between the two pressure rollers.

[0013] Preferably, a discharging roller is fixedly provided on one end of the upper surface of the frame.

[0014] Technical effects and advantages of the utility model:

[0015] 1. The utility model arranges a fixed frame above the frame, and an extrusion die is arranged above the fixed frame. The extrusion die can realize the synchronous extrusion of the nine-layer co-extruded film. By arranging a pressing roller and a movable roller inside the fixed frame, the movable roller can move toward the middle of the two pressing rollers to realize the compaction of the extruded film. By adjusting the position of the movable roller, the pressure can be controlled to ensure the molding effect of the nine-layer co-extruded film.

[0016] 2. The utility model provides a fixing frame, one side of the fixing frame is provided with an air guide cover, the outer side of the air guide cover is provided with a cooling fan, and the inner side of the air guide cover is provided with an air outlet. During the extrusion molding process of the nine-layer co-extruded film, the cooling fan can blow air to the surface of the film through the air guide cover, so that the film can be quickly cooled during the extrusion molding process to ensure the extrusion molding effect of the nine-layer co-extruded film. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 This is a schematic diagram of the fixing frame structure of the utility model.

[0019] Figure 3 It is a schematic cross-sectional view of the fixing frame structure of the utility model.

[0020] In the figure: 1. frame; 2. fixed frame; 3. extrusion die; 4. slide groove; 5. slide rod; 6. pressure roller; 7. positioning frame; 8. movable rod; 9. movable roller; 10. transmission plate; 11. connecting arm; 12. movable frame; 13. positioning sleeve; 14. threaded groove; 15. threaded rod; 16. air guide cover; 17. cooling fan; 18. air outlet nozzle; 19. discharge roller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides Figure 1-3The nine-layer co-extrusion film extrusion device shown comprises a frame 1, a fixed frame 2 is fixedly arranged in the middle of the upper surface of the frame 1, an extrusion die 3 is fixedly arranged at the top of the fixed frame 2, both ends of the outer side surface of the fixed frame 2 are penetrated with a slide groove 4 of a strip structure, a slide rod 5 is penetrated inside the slide groove 4, a pressure roller 6 is fixedly arranged in the middle of the slide rod 5, a positioning frame 7 is fixedly arranged in the middle of the outer side of the fixed frame 2, a movable rod 8 is penetrated inside the positioning frame 7, a movable roller 9 is fixedly arranged in the middle of the movable rod 8, a transmission plate 10 is movably arranged at one end of the movable rod 8 through a pin shaft, and the transmission plate 10 is set as a "T"-shaped structure, two connecting arms 11 are movably arranged at one end of the transmission plate 10 through a pin shaft, and the two connecting arms 11 are movably connected to one end of the two slide rods 5 through the pin shaft, the movable rod 8 drives the slide rod 5 to move through the transmission plate 10 and the connecting arm 11, and the slide rod 5 drives the pressure roller 6 to move, so that the two pressure rollers 6 move toward the direction of the movable roller 9, so that the position between the pressure roller 6 and the movable roller 9 is adjusted;

[0023] Specifically, one end of the movable rod 8 is movably provided with a movable frame 12 through a pin shaft, and two positioning sleeves 13 are sleeved in the middle of the movable frame 12, and the positioning sleeves 13 are fixedly provided on the outer side of the fixed frame 2, and the positioning sleeves 13 can limit the movement of the movable frame 12;

[0024] More specifically, a movable frame 12 is movably provided at one end of the movable rod 8 through a pin shaft, two positioning sleeves 13 are sleeved in the middle of the movable frame 12, and the positioning sleeves 13 are fixedly provided on the outside of the fixed frame 2, a thread groove 14 is penetrated in the middle of the movable frame 12, a threaded rod 15 is penetrated inside the thread groove 14, and the threaded rod 15 is movably provided in the middle of the fixed frame 2 through a bearing, and the thread groove 14 cooperates with the threaded rod 15, so that the movable frame 12 drives the movable rod 8 to move, and the movable rod 8 can drive the movable roller 9 to move;

[0025] In addition, an air guide cover 16 is fixedly provided at the middle part of the outer side of the fixing frame 2, and cooling fans 17 are fixedly provided at both ends of the outer side wall of the air guide cover 16, and an air outlet nozzle 18 is fixedly provided at the middle part of the inner side of the air guide cover 16, and the air outlet nozzle 18 is arranged between the two pressing rollers 6. The cooling fan 17 blows air to the surface of the film through the air guide cover 16 and the air outlet nozzle 18, so that the film is cooled quickly;

[0026] Moreover, a discharge roller 19 is fixedly provided at one end of the upper surface of the frame 1, and the discharge roller 19 is used to guide the formed film to the next process.

[0027] Working principle of this utility model:

[0028] When the device is in use, the raw materials of the nine-layer co-extruded film are pumped into the extrusion die 3, and the raw materials are extruded and formed after being guided by the extrusion die 3. At this time, the nine-layer co-extruded film is extruded through the bottom end of the extrusion die 3 and passes between the pressure roller 6 and the movable roller 9. At this time, the cold fan 17 blows air to the surface of the film through the air guide cover 16 and the air outlet nozzle 18 to quickly cool the film. In this process, the pressure roller 6 and the movable roller 9 can extrude the film to ensure the tight bonding between the multi-layer structure of the film. By rotating the threaded rod 15, the threaded rod 15 cooperates with the threaded groove 14, so that the movable frame 12 drives the movable rod 8 to move, and the movable rod 8 can drive the movable roller 9 to move, so that the movable roller 9 moves toward the direction of the pressure roller 6. At the same time, the movable rod 8 drives the sliding rod 5 to move through the transmission plate 10 and the connecting arm 11, and the sliding rod 5 drives the pressure roller 6 to move, so that the two pressure rollers 6 move toward the direction of the movable roller 9, so that the position between the pressure roller 6 and the movable roller 9 is adjusted, and then the pressure on the film is adjusted.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A nine-layer co-extrusion film extrusion device, comprising a frame (1), characterized in that: A fixed frame (2) is fixedly arranged in the middle of the upper surface of the frame (1), an extrusion die (3) is fixedly arranged at the top of the fixed frame (2), both ends of the outer side surface of the fixed frame (2) are penetrated by a slide groove (4) of a strip structure, a slide rod (5) is penetrated inside the slide groove (4), a pressure roller (6) is fixedly arranged in the middle of the slide rod (5), a positioning frame (7) is fixedly arranged in the middle of the outer side of the fixed frame (2), a movable rod (8) is penetrated inside the positioning frame (7), a movable roller (9) is fixedly arranged in the middle of the movable rod (8), a transmission plate (10) is movably arranged at one end of the movable rod (8) through a pin shaft, and the transmission plate (10) is set as a "T"-shaped structure, and two connecting arms (11) are movably arranged at one end of the transmission plate (10) through a pin shaft, and the two connecting arms (11) are movably connected to one end of the two slide rods (5) through the pin shaft respectively.

2. The nine-layer co-extrusion film extrusion device according to claim 1, characterized in that: A movable frame (12) is movably provided at one end of the movable rod (8) via a pin shaft, two positioning sleeves (13) are sleeved in the middle of the movable frame (12), and the positioning sleeves (13) are fixedly provided on the outside of the fixed frame (2).

3. A nine-layer co-extrusion film extrusion device according to claim 2, characterized in that: A thread groove (14) is provided through the middle of the movable frame (12), a threaded rod (15) is provided through the interior of the thread groove (14), and the threaded rod (15) is movably provided in the middle of the fixed frame (2) via a bearing.

4. The nine-layer co-extrusion film extrusion device according to claim 3, characterized in that: An air guide cover (16) is fixedly arranged at the middle part of the outer side of the fixing frame (2), and cooling fans (17) are fixedly arranged at both ends of the outer side wall of the air guide cover (16).

5. The nine-layer co-extrusion film extrusion device according to claim 4, characterized in that: An air outlet nozzle (18) is fixedly arranged at the middle part of the inner side of the air guide cover (16), and the air outlet nozzle (18) is arranged between the two pressure rollers (6).

6. The nine-layer co-extrusion film extrusion device according to claim 5, characterized in that: A discharging roller (19) is fixedly arranged on one end of the upper surface of the frame (1).

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