Plastic extruder for producing computer screen protective film

Abstract

The utility model relates to the field of protective film production, and discloses a plastic extruder for producing a computer screen protective film, which comprises a machine body, a machine barrel is arranged at the top of the machine body, a feeding barrel is arranged at the top of the machine barrel, a screw rod is arranged in the machine barrel, and a cleaning structure is arranged on the surface of the machine barrel. The cleaning structure comprises an extrusion nozzle, a threaded ring is fixedly connected to the outer wall of the extrusion nozzle, an embedding groove is formed in the inner wall of the machine barrel, a driving assembly is arranged on the surface of the machine barrel, a cleaning assembly is arranged in the machine barrel, the driving assembly comprises a fixing plate, and a motor is fixedly connected to the side wall of the fixing plate. The output end of the motor is fixedly connected with a reciprocating lead screw, and the outer wall of the reciprocating lead screw is in threaded connection with a moving block. According to the utility model, the cleaning structure is arranged to automatically clean the inner wall of the machine barrel, so that the production quality is ensured while the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of protective film production, and in particular to a plastic extruder for producing computer screen protectors. Background Technology

[0002] The substrate of computer screen protectors is usually processed by extrusion. A plastic extruder is used in this process to produce the substrate of the screen protector. The extruder can precisely control the thickness and width of the film to ensure the uniformity and quality of the protector. The extruder can process a variety of plastic raw materials, such as PET, PP, and PVC. These materials are commonly used in the production of screen protectors. The extruded film can be directly used in subsequent processes such as printing, coating, and cutting to achieve an integrated production process.

[0003] A search revealed a Chinese patent announcement number: CN220198496U, which discloses a plastic extruder. By lifting the water tank, inserting the limiting rod into the limiting hole, and installing the water tank on the fixed rod, the collector is lifted by holding the pull rod, causing the slider to slide into the groove and the collector to be installed in the water tank. When the screw rotates, the plastic residue remaining on its surface falls into the collector through the discharge port, thus solving the problem of the lack of residue collection function.

[0004] In the above technical solution, a water tank is used to collect the plastic residue left on the screw surface. However, the inside of the barrel lacks a cleaning function. After the plastic is extruded from the barrel, it will adhere to the inner wall of the barrel and cause solidification. It is difficult to clean it, which will reduce the extrusion speed. At the same time, the raw material may be contaminated. Therefore, a plastic extruder for the production of computer screen protector film is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a plastic extruder for the production of computer screen protectors, aiming to improve the problem that the existing plastic extruders for the production of computer screen protectors lack a barrel cleaning function, resulting in the solidified plastic adhering to the inner wall of the barrel, which leads to a decrease in extrusion speed and contamination of subsequent raw materials.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a plastic extruder for producing computer screen protectors, comprising a machine body, a barrel at the top of the machine body, a feed cylinder at the top of the barrel, a screw inside the barrel, a cleaning structure on the surface of the barrel, the cleaning structure including an extrusion nozzle, a threaded ring fixedly connected to the outer wall of the extrusion nozzle, an embedding groove on the inner wall of the barrel, a drive assembly on the surface of the barrel, and a cleaning assembly inside the barrel.

[0007] As a further description of the above technical solution:

[0008] The inner wall of the embedded groove is threadedly connected to the outer wall of the threaded ring.

[0009] As a further description of the above technical solution:

[0010] The drive assembly includes a fixed plate, a motor is fixedly connected to the side wall of the fixed plate, a reciprocating lead screw is fixedly connected to the output end of the motor, a moving block is threadedly connected to the outer wall of the reciprocating lead screw, and a limit plate is rotatably connected to the end of the reciprocating lead screw away from the motor.

[0011] As a further description of the above technical solution:

[0012] The cleaning assembly includes an electromagnetic plate, and the inner wall of the barrel is provided with a groove. An electromagnetic block is slidably connected to the inner wall of the groove, and an annular scraper is provided at the bottom of the electromagnetic block.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the fixing plate is fixedly connected to the outer wall of the feed cylinder, and the bottom of the limiting plate is fixedly connected to the outer wall of the cylinder.

[0015] As a further description of the above technical solution:

[0016] The top of the electromagnetic plate is fixedly connected to the lower surface of the moving block, and the lower surface of the electromagnetic plate is in contact with the outer wall of the barrel.

[0017] As a further description of the above technical solution:

[0018] The inner wall of the annular scraper is threaded with bolts, and a T-shaped block is fixedly connected to the top of the annular scraper.

[0019] As a further description of the above technical solution:

[0020] The lower surface of the moving block is provided with a T-slot and a screw hole.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the threaded ring and the embedded groove facilitate the separation of the extrusion nozzle from the barrel. The drive component controls the cleaning component to clean the inside of the barrel, so that the solidified plastic is scraped off from the inside of the barrel and discharged from the opening of the barrel. Cleaning the barrel can prevent the extrusion speed from slowing down due to residual material, ensure the continuity and stability of the extrusion process, thereby improving production efficiency. At the same time, it can prevent raw material contamination and ensure that the color, transparency and physical properties of the produced plastic products meet the quality requirements.

[0023] 2. In this utility model, by using bolts, T-slots, T-blocks and screw holes, the annular scraper and the moving block can be quickly installed or removed, which facilitates regular maintenance and cleaning of the annular scraper, thereby ensuring the cleaning effect on the barrel. Attached Figure Description

[0024] Figure 1 This is a front view schematic diagram of the main structure of a plastic extruder for producing computer screen protectors, as proposed in this utility model.

[0025] Figure 2 This is a schematic diagram showing the separation of the extrusion nozzle and barrel in a plastic extruder for producing computer screen protectors, as proposed in this utility model.

[0026] Figure 3 This is a bottom view of the structure for removing the extrusion nozzle and screw in a plastic extruder for producing computer screen protectors, as proposed in this utility model.

[0027] Figure 4 This is a schematic diagram showing the separation of the annular scraper and the moving block in a plastic extruder for producing computer screen protectors, as proposed in this utility model.

[0028] Figure 5 This utility model proposes a plastic extruder for the production of computer screen protectors. Figure 4 Enlarged schematic diagram of region A in the middle.

[0029] Legend:

[0030] 1. Machine body; 2. Machine barrel; 3. Feed cylinder; 4. Screw; 5. Extrusion nozzle; 6. Fixing plate; 7. Motor; 8. Reciprocating lead screw; 9. Moving block; 10. Electromagnetic plate; 11. Limiting plate; 12. Slide groove; 13. Electromagnetic block; 14. Annular scraper; 15. Threaded ring; 16. Embedded groove; 17. Bolt; 18. T-slot; 19. T-block; 20. Screw hole. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-3This utility model provides an embodiment of a plastic extruder for producing computer screen protectors, comprising a body 1, a barrel 2 at the top of the body 1, a feed cylinder 3 at the top of the barrel 2, a screw 4 inside the barrel 2, a cleaning structure on the surface of the barrel 2, the cleaning structure including an extrusion nozzle 5, a threaded ring 15 fixedly connected to the outer wall of the extrusion nozzle 5, an embedding groove 16 on the inner wall of the barrel 2, the extrusion nozzle 5 can be removed from the barrel 2 by the cooperation of the threaded ring 15 and the embedding groove 16, a drive assembly on the surface of the barrel 2, and a cleaning assembly inside the barrel 2.

[0033] Reference Figures 3-5 The inner wall of the embedded groove 16 is threadedly connected to the outer wall of the threaded ring 15. The drive assembly includes a fixing plate 6, the outer wall of which is fixedly connected to the outer wall of the feed cylinder 3. A motor 7 is fixedly connected to the side wall of the fixing plate 6. A reciprocating screw 8 is fixedly connected to the output end of the motor 7. A moving block 9 is threadedly connected to the outer wall of the reciprocating screw 8. The moving block 9 can move back and forth on the barrel 2 by rotating the reciprocating screw 8. A limit plate 11 is rotatably connected to the end of the reciprocating screw 8 away from the motor 7. The bottom of the limit plate 11 is fixedly connected to the outer wall of the barrel 2. The cleaning assembly includes an electromagnetic plate 10, the lower surface of which is connected to the outer wall of the barrel 2. The barrel 2 provides a certain limiting function for the electromagnetic plate 10, allowing it to slide back and forth on the outer wall of the barrel 2. The top of the electromagnetic plate 10 is fixedly connected to the lower surface of the moving block 9. The inner wall of the barrel 2 is provided with a sliding groove 12, which can reduce the wall thickness of the barrel 2 so that the electromagnetic plate 10 can attract the electromagnetic block 13, and at the same time provide guidance for the electromagnetic block 13. The electromagnetic block 13 is slidably connected to the inner wall of the sliding groove 12. When the electromagnetic plate 10 is energized, the opposite sides can be magnetically attracted. The bottom of the electromagnetic block 13 is provided with an annular scraper 14, which can scrape off the residual plastic on the inner wall of the barrel 2.

[0034] Reference Figure 5 The inner wall of the annular scraper 14 is threaded with a bolt 17, and the top of the annular scraper 14 is fixedly connected with a T-shaped block 19. The lower surface of the movable block 9 is provided with a T-shaped groove 18 and a screw hole 20. The outer wall of the bolt 17 is threadedly connected to the inner wall of the screw hole 20, and the outer wall of the T-shaped block 19 is adapted to the inner wall of the T-shaped groove 18.

[0035] Working principle: The door on the rear side of the feed cylinder 3 facilitates the feeding of plastic raw materials. The raw materials are discharged from the extrusion nozzle 5 via the screw 4, forming the material. Some material remains on the inner wall of the barrel 2. At this time, the operator holds the extrusion nozzle 5 and reverses the direction until the threaded ring 15 disengages from the insertion groove 16, leaving one end of the barrel 2 open. Then, the electromagnetic plate 10 and electromagnetic block 13 are energized, generating an attraction force. The motor 7 starts, driving the reciprocating screw 8 to rotate, causing the moving block 9 to move the electromagnetic plate 10 back and forth on the outer wall of the barrel 2. Because the electromagnetic plate 10 and electromagnetic block 13 are in a closed state... The magnetic attraction between the three is such that the electromagnetic block 13 slides inside the slide groove 12, driving the annular scraper 14 to move back and forth on the inner wall of the barrel 2, scraping off the plastic material attached to the inner wall of the barrel 2. Finally, it is cleaned through the opening of the barrel 2. When it is necessary to remove the annular scraper 14, the bolt 17 is reversed. After the bolt 17 gradually comes out of the screw hole 20, the annular scraper 14 is pulled outward. The T-shaped block 19 will gradually come out of the T-shaped groove 18 until the annular scraper 14 is separated from the moving block 9, so as to facilitate the replacement or cleaning of the annular scraper 14 and ensure the cleaning effect of the barrel 2.

[0036] Finally, it should be noted that the above description 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 foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plastic extruder for producing computer screen protectors, comprising a machine body (1), a barrel (2) disposed at the top of the machine body (1), a feed cylinder (3) disposed at the top of the barrel (2), and a screw (4) disposed inside the barrel (2), characterized in that: The surface of the barrel (2) is provided with a cleaning structure, the cleaning structure includes an extrusion nozzle (5), the outer wall of the extrusion nozzle (5) is fixedly connected with a threaded ring (15), the inner wall of the barrel (2) is provided with an embedding groove (16), the surface of the barrel (2) is provided with a driving component, and the interior of the barrel (2) is provided with a cleaning component.

2. The plastic extruder for producing computer screen protectors according to claim 1, characterized in that: The inner wall of the embedded groove (16) is threadedly connected to the outer wall of the threaded ring (15).

3. A plastic extruder for producing computer screen protectors according to claim 1, characterized in that: The drive assembly includes a fixed plate (6), a motor (7) is fixedly connected to the side wall of the fixed plate (6), a reciprocating screw (8) is fixedly connected to the output end of the motor (7), a moving block (9) is threadedly connected to the outer wall of the reciprocating screw (8), and a limit plate (11) is rotatably connected to the end of the reciprocating screw (8) away from the motor (7).

4. A plastic extruder for producing computer screen protectors according to claim 1, characterized in that: The cleaning assembly includes an electromagnetic plate (10), and the inner wall of the barrel (2) is provided with a groove (12). An electromagnetic block (13) is slidably connected to the inner wall of the groove (12), and an annular scraper (14) is provided at the bottom of the electromagnetic block (13).

5. A plastic extruder for producing computer screen protectors according to claim 3, characterized in that: The outer wall of the fixing plate (6) is fixedly connected to the outer wall of the feed cylinder (3), and the bottom of the limiting plate (11) is fixedly connected to the outer wall of the machine cylinder (2).

6. A plastic extruder for producing computer screen protectors according to claim 4, characterized in that: The top of the electromagnetic plate (10) is fixedly connected to the lower surface of the moving block (9), and the lower surface of the electromagnetic plate (10) is in contact with the outer wall of the barrel (2).

7. A plastic extruder for producing computer screen protectors according to claim 4, characterized in that: The inner wall of the annular scraper (14) is threaded with bolts (17), and the top of the annular scraper (14) is fixedly connected with a T-block (19).

8. A plastic extruder for producing computer screen protectors according to claim 3, characterized in that: The lower surface of the moving block (9) is provided with a T-slot (18) and a screw hole (20).

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