Mulching film extrusion molding device

Abstract

The invention relates to the technical field of mulching film production equipment, in particular to a mulching film extrusion molding device which comprises an extruder body and a mounting seat arranged on the extruder body, a blow molding machine body is mounted on the extruder body, a mounting rack is arranged on the mounting seat, two mounting frames are arranged on the mounting rack, and the two mounting frames are arranged on the extruder body. The mounting frame is provided with a filtering assembly for filtering molten plastic; the filter assembly comprises a moving frame arranged on the mounting frame, a first filter screen, a second filter screen and a third filter screen, the second filter screen and the third filter screen are arranged on the moving frame, the first filter screen is arranged close to the machine head, the second filter screen is connected to the moving frame in a sliding mode, and the second filter screen and the first filter screen are arranged in a spaced mode; the mesh diameter of the first filter screen is smaller than that of the second filter screen, and the mesh diameter of the second filter screen is equal to that of the third filter screen. The extruder has the effect that impurities can be better taken out of the extruder body.

Description

Technical Field

[0001] The present application relates to the technical field of ground film production equipment, and in particular to a ground film extrusion molding device. Background Art

[0002] Ground film is a ground covering film used for ground covering to increase soil temperature, retain soil moisture, maintain soil structure, prevent pests from attacking crops and diseases caused by certain microorganisms, etc., and promote plant growth. During the production of ground film, the plastic needs to be melted by an extruder, and then the molten plastic is welded from the outlet of the machine head into a complete tube embryo and then extruded from the uniform gap of the machine head. After inflation and cooling, the ground film is formed. However, in the actual production process, the molten plastic will contain some impurities. At this time, a filter screen needs to be set at the end of the extruder to filter out the impurities in the molten plastic through the filter screen.

[0003] For example, a Chinese patent document with the announcement number CN206230847U discloses an extruder head for non-stop screen change, including a twin-screw extruder head, two extrusion holes are arranged in the extruder head, the diameter of the extrusion hole gradually increases in the extrusion direction to form a trumpet-shaped structure, a feeding cavity is arranged in the extruder head, the extrusion hole is connected with the feeding cavity, a discharge port connected with the feeding cavity is arranged on the extruder head, guide holes are arranged on opposite sides of the feeding cavity, a feeding plate driven by a cylinder or a hydraulic cylinder is arranged on one side of the extruder head, the feeding plate passes through the corresponding guide hole, the feeding cavity, and another guide hole in sequence, two feeding positions are arranged on the feeding plate, each feeding position is provided with a plurality of feeding holes, and one of the feeding positions is located in the feeding cavity when the feeding plate is driven to move back and forth by the cylinder or the hydraulic cylinder. By setting a feeding plate driven by a cylinder or a hydraulic cylinder, there is no need to stop the machine to replace the feeding plate during operation.

[0004] In the above-mentioned related technologies, when the material changing plate is pulled to move, the material changing plate will move out of the extruder head. However, since the material changing plate is abutting against the inner wall of the extruder head, the material changing plate will move out of the extruder head with some impurities, and the remaining impurities will still remain in the extruder head, thereby affecting the subsequent operation of the extruder. Summary of the invention

[0005] The present application provides a ground film extrusion molding device, which aims to solve the problem in the related art that impurities cannot be completely cleaned from the extruder head.

[0006] The present application provides a mulch film extrusion molding device adopts the following technical solution: A ground film extrusion molding device comprises an extruder body and a mounting seat arranged on the extruder body, a blow molding machine body is installed on the extruder body, a mounting frame is arranged on the mounting seat, two mounting frames are arranged on the mounting frame, and the mounting frame is provided with a filter component for filtering molten plastic; the filter component comprises a movable frame arranged on the mounting frame, a first filter screen, and a second filter screen and a third filter screen arranged on the movable frame, the first filter screen is arranged close to the machine head, the second filter screen is slidably connected to the movable frame, and the second filter screen and the first filter screen are arranged at intervals, the mesh diameter of the first filter screen is smaller than the mesh diameter of the second filter screen, and the mesh diameter of the second filter screen is the same as the mesh diameter of the third filter screen, and a control component for driving the second filter screen to slide on the movable frame is arranged on the mounting frame, and the control component is used to adjust the mesh overlap area of ​​the second filter screen and the third filter screen.

[0007] By adopting the above technical solution, in the initial state, the mesh holes of the second filter screen and the mesh holes of the third filter screen completely correspond. At this time, the material with impurities will pass through the second filter screen and the third filter screen into the storage space between the first filter screen and the second filter screen, and then the impurities in the molten plastic will be filtered through the first filter screen. At this time, the impurities will be between the first filter screen and the second filter screen. When the impurities between the first filter screen and the second filter screen need to be cleaned, the second filter screen is directly driven to move through the control component to reduce the overlapping area of ​​the mesh holes of the second filter screen and the third filter screen, and the size of the overlapping area is equal to the mesh size of the first filter screen. At this time, the first filter screen, the second filter screen and the third filter screen can still filter the material, but the impurities will be blocked by the third filter screen and cannot enter the space between the second filter screen and the first filter screen. At this time, when the filter component is taken out, the impurities can be better taken out from the extruder body, reducing the impurities remaining in the extruder body during each cleaning.

[0008] Optionally, the movable frame is slidably connected to the installation frame, the sliding direction of the movable frame and the plugging direction of the first filter on the installation frame are arranged perpendicularly, and the installation frame is provided with an adjustment component for driving the movable frame to move toward the direction close to the first filter.

[0009] By adopting the above technical solution, since the adjustment component drives the moving frame to move toward the first filter screen, the size of the storage space between the first filter screen and the second filter screen can be reduced, and then the driving component drives the mounting frame to move, so that the filter component with impurities is moved out of the extruder body, and at the same time, another filter component without impurities is moved into the extruder body to continue filtering the material in the extruder body, thereby achieving the purpose of replacing the filter screen.

[0010] Optionally, a clearance groove is provided on the installation frame, the clearance groove is provided between the first filter screen and the second filter screen, and an elastic rubber sealing frame is provided in the clearance groove.

[0011] By adopting the above technical solution, when the movable frame needs to move toward the first filter screen, the elastic rubber sealing frame is compressed, and when the installation frame is taken out of the extruder, it can be reset under the action of the elastic rubber block itself.

[0012] Optionally, the control component includes a control screw rotatably connected to the movable frame, a control plate inserted into the control screw, and a movable plate fixed on the second filter screen, the control screw and the control plate are threadedly connected, and when the second filter screen is fully inserted into the movable frame, the movable plate abuts against the control plate.

[0013] By adopting the above technical solution, the control plate can be driven to slide on the installation frame by rotating the control screw. When the control plate moves, it will push the movable plate to slide on the movable frame. At this time, the movable frame and the second filter screen will move relative to the third filter screen, thereby facilitating the adjustment of the overlapping area of ​​the meshes of the second filter screen and the third filter screen.

[0014] Optionally, a moving block is provided on the control panel, a moving groove is provided on the control screw, the moving groove is opened along the length direction of the control screw, the moving block is slidably connected in the moving groove, and the moving block slides in the thread groove on the control screw.

[0015] By adopting the above technical solution, when the second filter is plugged in, the movable plate can be abutted against the control plate, and the control plate will be pushed to move while the second filter moves. At this time, the movable block slides in the movable groove. After the second filter is fully inserted, the control plate is in the initial state, which is convenient for subsequent adjustment of the position of the second filter. Therefore, when installing the second filter, there is no need to reversely rotate the control screw to move the control plate in the opposite direction to the initial position. The purpose of resetting the control plate can be achieved by directly pushing the second filter.

[0016] Optionally, a lower pressure plate is provided on the second filter screen, and the lower pressure plate abuts against the third filter screen to press the third filter screen. A control knob is fixedly installed at one end of the movable frame, and a fixed spring sheet is provided on the control knob. The fixed spring sheet is arranged around the control knob and abuts against the lower pressure plate.

[0017] By adopting the above technical solution, the fixed spring sheet abuts against the lower pressure plate, and then the lower pressure plate is pressed to fix the lower pressure plate. Then, when the control knob is turned, the fixed spring sheet is squeezed so that the fixed spring sheet no longer abuts against the lower pressure plate. Then, when the control knob is released, the side surface of the fixed spring sheet abuts against the side surface of the lower pressure plate. At this time, the purpose of fixing the lower pressure plate is still achieved.

[0018] Optionally, a sealing assembly is provided on the extruder body, and the sealing assembly seals the extruder body when the moving frame moves. The sealing assembly includes a sealing frame slidably connected to the extruder body and a sealing spring that pushes the sealing frame to move toward the moving frame, one end of the sealing spring is fixed to the extruder body, and the other end is fixed to the sealing frame.

[0019] By adopting the above technical solution, under the action of the sealing spring, the sealing frame is pushed to abut against the moving frame. When the moving frame moves toward the first filter screen, the sealing frame always abuts against the moving frame, thereby achieving a sealing effect.

[0020] Optionally, the adjustment assembly includes an adjustment plate fixed on the movable frame and an adjustment cylinder fixed on the adjustment plate, one end of the adjustment cylinder is fixed on the adjustment plate, and the other end is fixed on the mounting frame, and the adjustment cylinder is used to drive the movable frame to move away from or closer to the first filter.

[0021] Optionally, two connecting pipes are provided on the blow molding machine body, and the two connecting pipes are respectively connected to two extruder bodies. Different materials are arranged in the two extruder bodies. Four flow channels are arranged in the machine head, and the four flow channels include two arc channels and two horizontal channels. The four flow channels constitute an annular structure.

[0022] In summary, this application has the following beneficial effects: The overlapping area of ​​the meshes of the second filter screen and the third filter screen is adjusted to make the overlapping area of ​​the meshes of the second filter screen and the third filter screen the same as the mesh size of the first filter screen, and then the moving frame is driven by the adjusting component to move in the direction close to the first filter screen. At this time, the entire filter assembly can still filter the material. During the movement of the moving frame, the second filter screen is driven to move to squeeze the material in the storage space. Finally, the installation frame is driven out of the extruder body by the driving component. At this time, the other installation frame and the filter assembly will move into the extruder body, thereby achieving the purpose of cleaning impurities in the extruder body when replacing the filter assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0024] Figure 2 It is a schematic diagram of the structure of the filter component of Example 1 of the present application.

[0025] Figure 3 It is a schematic diagram of the filter assembly and mounting frame structure of Example 1 of the present application.

[0026] Figure 4 It is a schematic diagram of the structure of the first filter, the second filter and the third filter in Example 1 of the present application.

[0027] Figure 5 It is a schematic diagram of the control component structure of Example 1 of the present application.

[0028] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0029] Figure 7 It is a schematic diagram of the lower pressure plate structure of Example 1 of the present application.

[0030] Figure 8 yes Figure 5 Enlarged view of point A in the middle.

[0031] Fig. 9 It is a schematic diagram of the control board and moving block structure of Example 1 of the present application.

[0032] Fig.10 It is a schematic diagram of the main structure of the blow molding machine of Example 2 of the present application.

[0033] Fig.11 It is a schematic diagram of the flow channel structure of the blow molding machine body of the second embodiment of the present application.

[0034] 1. Extruder body; 2. Head; 3. Blow molding machine body; 4. Mounting seat; 5. Mounting frame; 6. Plug strip; 7. Plug slot; 8. Storage space; 9. Filter assembly; 10. Moving frame; 11. First filter screen; 12. Second filter screen; 13. Third filter screen; 14. Third filter screen; 15. Control assembly; 16. Control screw; 17. Control board; 18. Moving board; 19. Adjustment assembly; 20. Adjustment board; 21. Adjustment cylinder; 22. Elastic rubber sealing frame; 23. Move block; 24. Move slot; 25. Press plate; 26. Control knob; 27. Fixed spring; 28. Elastic connecting rod; 29. ​​Sealing assembly; 30. Sealing frame; 31. Sealing spring; 32. Drive assembly; 33. Drive frame; 34. Drive cylinder; 35. Connecting pipe; 36. Arc channel; 37. Horizontal channel. DETAILED DESCRIPTION

[0035] The following combination Figure 1-Figure 11 This application is described in further detail.

[0036] Embodiment 1: The present application embodiment discloses a ground film extrusion molding device. Figure 1 and Figure 2A ground film extrusion molding device includes an extruder body 01 and a mounting seat 02 arranged on the extruder body 01, a mounting frame 03 is slidably connected to the mounting seat 02, two mounting frames 04 are arranged on the mounting frame 03, and the mounting frame 04 is provided with a filter component 1 for filtering molten plastic. The filter component 1 and the head 011 are arranged correspondingly. At the same time, a driving component 7 is arranged on the mounting seat 02, and the driving component 7 is used to drive the mounting frame 03 to move, so that the two mounting frames 04 can correspond to the head 011 alternately, so that when one mounting frame 04 extends out of the extruder body 01, the filter component 1 on the other mounting frame 04 corresponds to the head 011, so that when cleaning impurities on the filter component 1, it can be replaced without stopping the machine. In addition, a blow molding machine body 012 for blow molding the material extruded by the extruder body 01 is installed on the head 011.

[0037] Reference Figure 1 and Figure 2 The driving assembly 7 includes a driving frame 71 fixed on the mounting seat 02 and a driving cylinder 72 fixed on the driving frame 71. The cylinder body of the driving cylinder 72 is fixed on the driving frame 71, and the piston rod is fixed on the mounting frame 03, so that when the driving cylinder 72 works, it can drive the mounting frame 03 to move, thereby adjusting the positions of the two mounting frames 04.

[0038] Reference Figures 2 to 4 The filter assembly 1 includes a movable frame 11, a first filter screen 12, a second filter screen 13 and a third filter screen 14 arranged on the movable frame 11, a plug-in strip 05 is arranged on the first filter screen 12, and a plug-in slot 06 for plugging the plug-in strip 05 is opened on the mounting frame 04. The first filter screen 12 is inserted into the mounting frame 04 through the side of the mounting frame 04, and the plug-in strip 05 is also fixedly installed on the second filter screen 13 and the third filter screen 14. The movable frame 11 and the mounting frame 04 are both provided with a plug-in slot 06 for plugging the plug-in strip 05. The second filter screen 13 and the third filter screen 14 are connected by the plug-in strip 05. 5 is plugged into the movable frame 11; at the same time, the first filter screen 12 is arranged close to the machine head 011, the second filter screen 13 is abutted against the third filter screen 14, and the second filter screen 13 and the first filter screen 12 are arranged at intervals. In this embodiment, the space between the second filter screen 13 and the first filter screen 12 is defined as the material storage space 07, and the mesh diameter of the first filter screen 12 is smaller than the mesh diameter of the second filter screen 13. In this embodiment, the mesh diameter of the second filter screen 13 is the same as the mesh diameter of the third filter screen 14. The first filter screen 12, the second filter screen 13 and the third filter screen 14 are all composed of the filter screen body and the frame body, so as to achieve the purpose of easy installation and disassembly.

[0039] Reference Figures 2 to 4, the moving frame 11 is slidably connected to the installation frame 04, and the sliding direction of the moving frame 11 is perpendicular to the plugging direction of the first filter screen 12 on the installation frame 04; a control component 2 is arranged on the installation frame 04, and the control component 2 is used to drive the second filter screen 13 to slide on the moving frame 11, and then the mesh overlap area of ​​the second filter screen 13 and the third filter screen 14 can be adjusted. In the initial state, the mesh of the second filter screen 13 and the mesh of the third filter screen 14 completely correspond. At this time, the material with impurities will pass through the second filter screen 13 and the third filter screen 14 into the storage space 07 between the first filter screen 12 and the second filter screen 13, and then the impurities in the molten plastic will be filtered through the first filter screen 12. At this time, the impurities will It is located between the first filter screen 12 and the second filter screen 13; when the impurities between the first filter screen 12 and the second filter screen 13 need to be cleaned, the second filter screen 13 is directly driven to move through the control component 2, so that the overlapping area of ​​the mesh holes of the second filter screen 13 and the third filter screen 14 becomes smaller, and the overlapping area size is equal to the mesh size of the first filter screen 12. At this time, the first filter screen 12, the second filter screen 13 and the third filter screen 14 can still filter the material, but the impurities will be blocked by the third filter screen 14 and cannot enter the space between the second filter screen 13 and the first filter screen 12. At this time, when the filter component 1 is taken out, the impurities can be better taken out from the extruder body 01, reducing the impurities remaining in the extruder body 01 during each cleaning.

[0040] Reference Figures 2 to 4 When replacing the filter component 1, in order to reduce the melted material and the filter component 1 being moved out of the extruder body 01 at the same time, an adjustment component 3 is arranged on the mounting frame 04, and the adjustment component 3 is used to drive the moving frame 11 to move in the direction close to the first filter screen 12, so as to reduce the size of the storage space 07 between the first filter screen 12 and the second filter screen 13, and then the driving component 7 drives the mounting frame 03 to move, so that the filter component 1 with impurities is moved out of the extruder body 01, and at the same time, another filter component 1 without impurities is moved into the extruder body 01 to continue filtering the material in the extruder body 01, so as to achieve the purpose of replacing the filter screen. In addition, the machine can be replaced without stopping.

[0041] Reference Figures 2 to 4 Since the adjusting component 3 drives the moving frame 11 to move, the raw material between the first filter screen 12 and the second filter screen 13 will be squeezed at this time, reducing the material adhesion to the filter component 1, and it is also convenient to remove impurities in the extruder body 01; in this embodiment, the adjusting component 3 includes an adjusting plate 31 fixed on the moving frame 11 and an adjusting cylinder 32 fixed on the adjusting plate 31, one end of the adjusting cylinder 32 is fixed on the adjusting plate 31, and the other end is fixed on the mounting frame 04, and the adjusting cylinder 32 is used to drive the mounting plate to move away from or close to the first filter screen 12.

[0042] Reference Figures 2 to 4A clearance groove 41 is provided on the installation frame 04, and the clearance groove 41 is provided between the first filter screen 12 and the second filter screen 13, and an elastic rubber sealing frame 4 is provided in the clearance groove 41. When the movable frame 11 needs to be moved toward the direction close to the first filter screen 12, the elastic rubber sealing frame 4 is compressed. When the installation frame 04 is taken out of the extruder, it can be reset under the action of the elastic rubber sealing frame 4. In addition, a lower pressing plate 44 is provided on the second filter screen 13, and the lower pressing plate 44 abuts against the third filter screen 14 to press the third filter screen 14.

[0043] Reference Figures 4 to 6 The control assembly 2 includes a control screw 21 rotatably connected to the moving frame 11, a control plate 22 inserted into the control screw 21, and a moving plate 23 fixed on the second filter screen 13. The control screw 21 and the control plate 22 are threadedly connected. When the second filter screen 13 is fully inserted into the moving frame 11, the moving plate 23 abuts against the control plate 22. Then, by rotating the control screw 21, the control plate 22 can be driven to slide on the mounting frame 04. When the control plate 22 moves, it will push the moving plate 23 to slide on the moving frame 11. At this time, the moving frame 11 and the second filter screen 13 will move relative to the third filter screen 14, thereby facilitating the adjustment of the mesh overlap area of ​​the second filter screen 13 and the third filter screen 14.

[0044] Reference Figures 4 to 6 A moving block 42 is provided on the control plate 22, and a moving groove 43 is provided on the control screw 21. The moving groove 43 is provided along the length direction of the control screw 21. The moving block 42 is slidably connected in the moving groove 43. At the same time, the moving block 42 can also slide in the threaded groove on the control screw 21. The moving plate 23 on the second filter screen 13 is fully inserted into the moving frame 11, and the moving plate 23 abuts against the control plate 22. At this time, the opening of the moving groove 43 is away from the ground, and the moving block 42 is in the moving groove 43. Then, when adjusting the position of the second filter screen 13, the control screw 21 is rotated. After the position adjustment of the second filter screen 13 is completed, the opening of the moving groove 43 is still set away from the ground, and the moving block 42 is still in the moving groove 43.

[0045] Reference Figures 2 to 4When the filter assembly 1 is taken out from the extruder body 01, the second filter screen 13 and the third filter screen 14 are directly removed from the movable frame 11. When the second filter screen 13 and the third filter screen 14 are removed, the control board 22 and the movable board 23 are no longer in contact with each other, and then a new filter assembly 1 is replaced; when the second filter screen 13 is inserted, the movable board 23 can be made to contact with the control board 22, and the control board 22 will be pushed to move while the second filter screen 13 moves. At this time, the movable block 42 slides in the movable groove 43. After the second filter screen 13 is fully inserted, the control board 22 is in the initial state, which is convenient for subsequent adjustment of the position of the second filter screen 13. Therefore, when installing the second filter screen 13, there is no need to reversely rotate the control screw 21 to make the control board 22 move in the opposite direction to the initial position. The purpose of resetting the control board 22 can be achieved by directly pushing the second filter screen 13.

[0046] Reference Figures 4 to 9 In order to facilitate the rotation of the control screw 21, one end of the control screw 21 is extended out of the moving frame 11, and the end extending out of the moving frame 11 is fixedly installed with the control knob 5, and an elastic connecting rod 52 is arranged on the control knob 5, and a fixed spring piece 51 is arranged on the elastic connecting rod 52. The fixed spring piece 51 is arranged along the control knob 5 for a circle, and the fixed spring piece 51 abuts against the lower pressure plate 44, and then the lower pressure plate 44 is pressed to fix the lower pressure plate 44, and then when the control knob 5 is rotated, the fixed spring piece 51 is squeezed, and the elastic connecting rod 52 is compressed, so that the fixed spring piece 51 no longer abuts against the lower pressure plate 44, and then when the control knob 5 is released, the side of the fixed spring piece 51 abuts against the side of the lower pressure plate 44, and the elastic connecting rod 52 is still compressed, and at this time it is still for the purpose of fixing the lower pressure plate 44.

[0047] Replay Figure 1 and Figure 2 A sealing component 6 is provided on the extruder body 01. The sealing component 6 can seal the extruder body 01 when the moving frame 11 moves. The sealing component 6 includes a sealing frame 61 slidably connected to the extruder body 01 and a sealing spring 62 that pushes the sealing frame 61 to move toward the moving frame 11. One end of the sealing spring 62 is fixed to the extruder body 01, and the other end is fixed to the sealing frame 61. Under the action of the sealing spring 62, the sealing frame 61 is pushed to abut against the moving frame 11. When the moving frame 11 moves toward the first filter screen 12, the sealing frame 61 always abuts against the moving frame 11, thereby achieving a sealing effect.

[0048] The implementation principle of a ground film extrusion molding device in the embodiment of the present application is as follows: the plastic in the extruder body 01 is melted and enters the machine head 011 through the filter assembly 1. In the initial state, the overlapping area of ​​the meshes of the second filter screen 13 and the third filter screen 14 is the largest. At this time, the impurities in the material will enter the storage channel through the second filter screen 13 and the third filter screen 14. When it is necessary to clean the impurities in the storage space 07, first turn the control screw 21, the control screw 21 drives the control plate 22 to move, and the control plate 22 pushes the second filter screen 13 to move, and the overlapping area of ​​the meshes of the second filter screen 13 and the third filter screen 14 is adjusted so that the second filter screen 13 The size of the overlapping area of ​​the mesh of the third filter screen 14 is the same as the mesh size of the first filter screen 12, and then the moving frame 11 is driven by the adjustment component 3 to move in the direction close to the first filter screen 12. At this time, the entire filter component 1 can still filter the material. During the movement of the moving frame 11, the second filter screen 13 is driven to move to squeeze the material in the storage space 07. Finally, the installation frame 04 is driven by the driving component 7 to move out of the extruder body 01. At this time, the other installation frame 04 and the filter component 1 will move into the extruder body 01, thereby achieving the purpose of cleaning impurities in the extruder body 01 when replacing the filter component 1.

[0049] Embodiment 2: The difference from the first embodiment is that different materials are used to produce the ground film by utilizing the different aging times of different raw materials, and the different materials are distributed in strips in the width direction of the ground film.

[0050] Reference Figure 1 , Fig.10 and Fig.11 Two connecting pipes 8 are arranged on the blow molding machine body 012, and the two connecting pipes 8 are respectively connected to the two extruder bodies 01. Different materials are arranged in the two extruder bodies 01, and then the molten raw materials in the two extruder bodies 01 enter the head 011. At the same time, four flow channels are arranged in the head 011, and the four flow channels include two arc channels 81 and two horizontal channels 82. The four flow channels constitute an annular structure, and then the material with higher strength enters the two arc channels 81, and the material with lower strength enters the horizontal channel 82. Finally, different materials are distributed in strips in the width direction of the ground film, and the strength of the covering crop part is reduced after being degraded prematurely under the action of sunlight, so it is convenient to tear from here without damaging the crop during recycling.

[0051] Working principle: The materials from two extruders flow forward in different channels. Before reaching the outlet of die head 011, the two raw materials are melted into a complete tube embryo and then extruded from the uniform gap of die head 011. After being inflated and cooled, the ground film is formed. Different materials are distributed in strips in the width direction of the ground film. The part covering the crops is degraded in advance under the action of sunlight and its strength is reduced. It is easy to tear from here when recycling without damaging the crops.

[0052] 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 ground film extrusion molding device, comprising an extruder body (01) and a mounting seat (02) arranged on the extruder body (01), wherein a blow molding machine body (012) is mounted on the extruder body (01), characterized in that: The mounting seat (02) is provided with a mounting frame (03), the mounting frame (03) is provided with two mounting frames (04), the mounting frame (04) is provided with a filter assembly (1) for filtering molten plastic; the filter assembly (1) comprises a movable frame (11) arranged on the mounting frame (04), a first filter screen (12), a second filter screen (13) and a third filter screen (14) arranged on the movable frame (11), the first filter screen (12) being arranged close to the machine head (011) and plugged into the mounting frame (04), the second filter screen (13) and a third filter screen (14) being arranged on the movable frame (11), ) is slidably connected to the movable frame (11), and the second filter screen (13) and the first filter screen (12) are arranged at intervals, the mesh diameter of the first filter screen (12) is smaller than the mesh diameter of the second filter screen (13), and the mesh diameter of the second filter screen (13) is the same as the mesh diameter of the third filter screen (14), and the mounting frame (04) is provided with a control component (2) for driving the second filter screen (13) to slide on the movable frame (11), and the control component (2) is used to adjust the mesh overlap area of ​​the second filter screen (13) and the third filter screen (14).

2. A mulch film extrusion molding device according to claim 1, characterized in that: The movable frame (11) is slidably connected to the mounting frame (04); the sliding direction of the movable frame (11) and the plugging direction of the first filter screen (12) on the mounting frame (04) are arranged perpendicularly; and the mounting frame (04) is provided with an adjustment component (3) for driving the movable frame (11) to move in a direction close to the first filter screen (12).

3. A mulch film extrusion molding device according to claim 1, characterized in that: The installation frame (04) is provided with a clearance groove (41), the clearance groove (41) is arranged between the first filter screen (12) and the second filter screen (13), and an elastic rubber sealing frame (4) is arranged in the clearance groove (41).

4. A mulch film extrusion molding device according to claim 1, characterized in that: The control assembly (2) comprises a control screw (21) rotatably connected to the moving frame (11), a control plate (22) inserted through the control screw (21), and a moving plate (23) fixed to the second filter screen (13); the control screw (21) and the control plate (22) are threadedly connected; when the second filter screen (13) is fully inserted into the moving frame (11), the moving plate (23) abuts against the control plate (22).

5. A mulch film extrusion molding device according to claim 4, characterized in that: The control plate (22) is provided with a moving block (42), the control screw (21) is provided with a moving groove (43), the moving groove (43) is opened along the length direction of the control screw (21), the moving block (42) is slidably connected in the moving groove (43), and the moving block (42) slides in the thread groove on the control screw (21).

6. A mulch film extrusion molding device according to claim 1, characterized in that: A lower pressure plate (44) is provided on the second filter screen (13), and the lower pressure plate (44) abuts against the third filter screen (14) to press the third filter screen (14). A control knob (5) is fixedly mounted on one end of the movable frame (11), and an elastic connecting rod (52) is provided on the control knob (5). A fixed spring sheet (51) is provided on the elastic connecting rod (52), and the fixed spring sheet (51) is arranged around the control knob (5), and the fixed spring sheet (51) abuts against the lower pressure plate (44).

7. A mulch film extrusion molding device according to claim 1, characterized in that: The extruder body (01) is provided with a sealing component (6), and the sealing component (6) seals the extruder body (01) when the moving frame (11) moves. The sealing component (6) comprises a sealing frame (61) slidably connected to the extruder body (01) and a sealing spring (62) that pushes the sealing frame (61) to move in a direction close to the moving frame (11). One end of the sealing spring (62) is fixed to the extruder body (01), and the other end is fixed to the sealing frame (61).

8. A ground film extrusion molding device according to claim 2, characterized in that: The adjustment assembly (3) comprises an adjustment plate (31) fixed on the moving frame (11) and an adjustment cylinder (32) fixed on the adjustment plate (31); one end of the adjustment cylinder (32) is fixed on the adjustment plate (31) and the other end is fixed on the mounting frame (04); the adjustment cylinder (32) is used to drive the moving frame (11) to move in a direction away from or towards the first filter screen (12).

9. A mulch film extrusion molding device according to claim 1, characterized in that: Two connecting pipes (8) are arranged on the blow molding machine body (012), and the two connecting pipes (8) are respectively connected to the two extruder bodies (01), and different materials are arranged in the two extruder bodies (01). Four flow channels are arranged in the head (011), and the four flow channels include two arc-shaped channels (81) and two horizontal channels (82), and the four flow channels form an annular structure.

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