Polyethylene plastic pipe extruder

Abstract

The utility model relates to the field of polyethylene plastic pipes, and discloses a polyethylene plastic pipe extruder which comprises a box body, the top of the box body is fixedly connected with a feeding box, the top of the box body is rotatably connected with a rotating shaft, the outer wall of the rotating shaft is rotatably connected with an opening and closing cover, and the top of the opening and closing cover is fixedly connected with a handle. The bottom of the opening and closing cover is fixedly connected with an ejector block, the bottom of the ejector block is slidably connected with an upper fixing block, the bottom of the upper fixing block is slidably connected with an upper mold, the bottom of the upper mold is fixedly connected with a lower mold, and the bottom of the lower mold is fixedly connected with a lower fixing block. According to the plastic pipe mold, the opening and closing cover is opened firstly, then the upper fixing block is lifted up to drive the fixing strip to be separated from the upper mold, and the connecting strip is lifted up under the action of the fixing column and the spring, so that the effect of easily replacing the mold is achieved, and the problem that different devices need to be used for producing plastic pipes of different sizes is solved; therefore, the high efficiency of the polyethylene plastic pipe extruder is improved.

Description

Technical Field

[0001] This utility model relates to the field of polyethylene plastic pipes, and in particular to a polyethylene plastic pipe extruder. Background Technology

[0002] Polyethylene (PE) plastic pipes are primarily made from polyethylene, a high-molecular-weight material. Polyethylene possesses excellent physical properties and chemical stability, making PE plastic pipes widely applicable in many fields. The production of PE plastic pipes requires a specialized PE plastic pipe extruder. Through the extruder, the diameter, wall thickness, and other dimensions and shape of the plastic pipe can be precisely controlled, ensuring product quality and consistency. The PE plastic pipe extruder also enables continuous and efficient production, significantly improving production efficiency. It can quickly convert polyethylene raw materials into finished pipes and can continuously produce without interruption, meeting the large market demand for PE plastic pipes.

[0003] The working principle of existing polyethylene plastic pipe extruders is as follows: First, the prepared polyethylene raw material is slowly added into the hopper of the extruder. Then, the screw inside the extruder starts to rotate. During the rotation, it continuously conveys the polyethylene raw material forward and heats it at the same time, gradually transforming it from a solid state to a molten plastic state. When the polyethylene raw material is completely molten, under the strong extrusion action of the screw, the molten polyethylene is extruded through the die head, gradually forming a tube. Next, the extruded plastic pipe passes through a series of shaping and cooling devices. These devices help the plastic pipe cool and shape quickly, allowing it to maintain the required shape and size. Finally, the shaped and cooled plastic pipe is smoothly led out of the extruder by a traction device and cut into specific lengths according to actual production needs. Thus, the entire polyethylene plastic pipe extrusion process is successfully completed.

[0004] However, in the actual use of polyethylene plastic pipe extruders, there is a problem: no effective solution has been found to address the situation where different equipment must be used to produce plastic pipes of different sizes. This results in the need to change the corresponding equipment whenever different sizes of plastic pipes are required, which undoubtedly brings many inconveniences to production and seriously affects the efficiency of polyethylene plastic pipe extruders, preventing production efficiency from being fully utilized and increasing production costs and time costs to a certain extent. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a polyethylene plastic pipe extruder, which aims to improve the problem of needing to use different equipment when producing plastic pipes of different sizes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a polyethylene plastic pipe extruder, comprising a housing, a feed box fixedly connected to the top of the housing, a rotating shaft rotatably connected to the top of the housing, an opening and closing cover rotatably connected to the outer wall of the rotating shaft, a handle fixedly connected to the top of the opening and closing cover, a top block fixedly connected to the bottom of the opening and closing cover, an upper fixing block slidably connected to the bottom of the top block, an upper mold slidably connected to the bottom of the upper fixing block, a lower mold fixedly connected to the bottom of the upper mold, a lower fixing block fixedly connected to the bottom of the lower mold, multiple fixing strips fixedly connected inside the upper mold, multiple limiting components provided inside the upper mold, multiple connecting strips rotatably connected inside the lower mold, and multiple support components provided on one side of each connecting strip;

[0007] The limiting component includes a locking pin, a fixing plate, and a second spring. The outer wall of the locking pin is slidably connected to the inside of the upper mold. One side of the fixing plate is fixedly connected to the outer wall of the locking pin. The second spring is disposed inside the upper mold. One end of the second spring is fixedly connected to one end of the locking pin, and the other end of the second spring is fixedly connected to the inside of the upper mold.

[0008] As a further description of the above technical solution:

[0009] The support assembly includes a fixed column and a spring. One end of the fixed column is fixedly connected to one side of the connecting strip. The spring is disposed inside the lower mold. One end of the spring is fixedly connected to one end of the fixed column, and the other end of the spring is fixedly connected to the inside of the lower mold.

[0010] As a further description of the above technical solution:

[0011] A water storage tank is fixedly connected to the top of the box, and a water injection pipe is fixedly connected to the top of the water storage tank.

[0012] As a further description of the above technical solution:

[0013] A circulation pump is fixedly connected to one side of the water storage tank, and an inlet pipe is fixedly connected to one side of the circulation pump. The input end of the circulation pump is connected to one side of the water storage tank, and the output end of the circulation pump is connected to the inlet pipe.

[0014] As a further description of the above technical solution:

[0015] A cooling pipe is fixedly connected to one end of the water inlet pipe, and a return pipe is fixedly connected to one end of the cooling pipe.

[0016] As a further description of the above technical solution:

[0017] A cooling box is fixedly connected to one side of the box, and multiple fans are fixedly connected to the outer wall of the cooling box.

[0018] As a further description of the above technical solution:

[0019] The cooling pipes are arranged in a ring array inside the cooling box, and the water inlet pipe and return pipe are arranged in a parallel array and fixedly connected to one side of the cooling pipes.

[0020] As a further description of the above technical solution:

[0021] The upper mold and the lower mold are arranged in a parallel array and fixedly connected between the upper fixing block and the lower fixing block. The upper fixing block and the lower fixing block are arranged in a parallel array inside the box.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the opening and closing cover is first opened using the handle, which will cause the top block to lift upward. Then, the operator lifts the upper fixing block, thereby causing the fixing strip to be dislodged from the upper mold. The connecting strip is then lifted by the fixing column and the spring, thus achieving the effect of easily changing the mold during equipment use. This avoids the problem of needing to use different equipment to produce plastic pipes of different sizes, thereby improving the efficiency of the polyethylene plastic pipe extruder.

[0024] 2. In this utility model, cooling water is first injected into the water storage tank through the water injection pipe. Then, the circulation pump is started to allow the cooling water to be introduced from the water inlet pipe into the cooling pipe to cool the plastic pipe. Then, the water returns to the water storage tank through the return pipe for reuse. At the same time, the fan is started to cool the extruded plastic pipe. This achieves simultaneous cooling of the extruded plastic pipe with cooling water and cooling with the fan, avoiding the problem that using a single cooling method cannot achieve good cooling when cooling the extruded cooling pipe. This improves the practicality of the polyethylene plastic pipe extruder. Attached Figure Description

[0025] Figure 1 This is a perspective view of a polyethylene plastic pipe extruder proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the upper die structure of a polyethylene plastic pipe extruder proposed in this utility model;

[0027] Figure 3 for Figure 2 A magnified view of the structure at point A in the middle;

[0028] Figure 4This is a schematic diagram of the internal structure of the cooling box of a polyethylene plastic pipe extruder according to the present invention.

[0029] Legend:

[0030] 1. Box body; 2. Feed box; 3. Rotating shaft; 4. Opening and closing cover; 5. Handle; 6. Top block; 7. Upper fixing block; 8. Upper mold; 9. Lower mold; 10. Lower fixing block; 11. Fixing strip; 12. Connecting strip; 13. Fixing column; 14. Spring 1; 15. Locking pin; 16. Fixing plate; 17. Spring 2; 18. Water storage tank; 19. Water injection pipe; 20. Circulation pump; 21. Water inlet pipe; 22. Cooling pipe; 23. Cooling box; 24. Fan; 25. Return pipe. 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 1-3 An embodiment of this utility model provides a polyethylene plastic pipe extruder, including a housing 1, a feed box 2 fixedly connected to the top of the housing 1 for feeding raw materials into the housing 1, a rotating shaft 3 rotatably connected to the top of the housing 1, an opening and closing cover 4 rotatably connected to the outer wall of the rotating shaft 3 for fixing the mold and opening the housing 1, a handle 5 fixedly connected to the top of the opening and closing cover 4, a top block 6 fixedly connected to the bottom of the opening and closing cover 4 for pressing the mold to prevent it from moving, an upper fixing block 7 slidably connected to the bottom of the top block 6 for pressing the mold to prevent it from sliding, an upper mold 8 slidably connected to the bottom of the upper fixing block 7 for producing plastic pipes, a lower mold 9 fixedly connected to the bottom of the upper mold 8, a lower fixing block 10 fixedly connected to the bottom of the lower mold 9 for fixing the mold, multiple fixing strips 11 fixedly connected inside the upper mold 8 for fixing the upper mold 8 and the lower mold 9, multiple limiting components provided inside the upper mold 8, and multiple connecting strips 12 rotatably connected inside the lower mold 9 for connecting the upper mold 8 and the lower mold 9, with multiple support components provided on one side of the connecting strips 12;

[0033] The limiting assembly includes a locking pin 15, a fixing plate 16, and a second spring 17. The outer wall of the locking pin 15 is slidably connected to the inside of the upper mold 8 to fix the connecting strip 12. One side of the fixing plate 16 is fixedly connected to the outer wall of the locking pin 15 to limit the movement range of the locking pin 15. The second spring 17 is disposed inside the upper mold 8 to provide force support for the movement of the locking pin 15. One end of the second spring 17 is fixedly connected to one end of the locking pin 15, and the other end of the second spring 17 is fixedly connected to the inside of the upper mold 8. The support assembly includes a fixing post 13 and a first spring 14. One end of the fixing post 13 is fixedly connected to one side of the connecting strip 12 to support the movement of the connecting strip 12. The first spring 14 is disposed inside the lower mold 9 to provide force support for the connecting strip 12. One end of the first spring 14 is fixedly connected to one end of the fixing post 13, and the other end of the first spring 14 is fixedly connected to the inside of the lower mold 9.

[0034] Specifically, after the upper mold 8 and lower mold 9 of suitable size are tightly fitted together, the operator places them above the lower fixing block 10. Then, the upper fixing block 7 is installed above the upper mold 8 and lower mold 9. The fixing strip 11 connected to the upper fixing block 7 will be inserted into the interior of the upper mold 8 and lower mold 9. During this process, the fixing strip 11 will continuously push the connecting strip 12 to rotate inward. As the connecting strip 12 rotates, the fixing post 13 will be squeezed, which will compress the spring 14 and cause it to deform. At the same time, the locking pin 15 will also tightly lock the connecting strip 12. In this way, the upper mold 8 and lower mold 9 can be firmly fixed and will not easily loosen or shift.

[0035] Reference Figure 4 A water storage tank 18 is fixedly connected to the top of the housing 1 for storing cooling water. A water injection pipe 19 is fixedly connected to the top of the water storage tank 18 for injecting cooling water. A circulation pump 20 is fixedly connected to one side of the water storage tank 18 for circulating the cooling water. An inlet pipe 21 is fixedly connected to one side of the circulation pump 20 for guiding the cooling water into the cooling pipe 22. The input end of the circulation pump 20 is connected to one side of the water storage tank 18, and the output end of the circulation pump 20 is connected to the inlet pipe 21. A cooling pipe 22 is fixedly connected to one end of the inlet pipe 21 for cooling the extruded plastic pipe. A return pipe is fixedly connected to one end of the cooling pipe 22. The flow pipe 25 is used to guide the cooling water after cooling is completed back to the water storage tank 18. A cooling tank 23 is fixedly connected to one side of the tank body 1. Multiple fans 24 are fixedly connected to the outer wall of the cooling tank 23 for cooling the extruded plastic tubes. The cooling pipes 22 are arranged in a ring array inside the cooling tank 23. The water inlet pipe 21 and the return pipe 25 are arranged in a parallel array and fixedly connected to one side of the cooling pipes 22. The upper mold 8 and the lower mold 9 are arranged in a parallel array and fixedly connected between the upper fixing block 7 and the lower fixing block 10. The upper fixing block 7 and the lower fixing block 10 are arranged in a parallel array inside the tank body 1.

[0036] Specifically, firstly, the operator adds an appropriate amount of cooling water to the water storage tank 18 through the water injection pipe 19. Next, the operator starts the circulation pump 20, which smoothly guides the cooling water from the water storage tank 18 into the inlet pipe 21. Subsequently, this cooling water is continuously drawn from the inlet pipe 21 into the cooling pipe 22. Inside the cooling pipe 22, the cooling water effectively cools the extruded plastic tube during its continuous flow. After cooling, the water continues to flow and is eventually guided into the return pipe 25, thus smoothly returning to the water storage tank 18. Simultaneously, the fan 24 also starts working, rapidly directing airflow outwards to further enhance the cooling effect on the extruded plastic tube, ensuring rapid cooling and shaping, and improving production efficiency and product quality.

[0037] Working principle: In the process of using the polyethylene plastic pipe extruder, first select the corresponding size mold, then fit the upper mold 8 and lower mold 9 together and place them on top of the lower fixing block 10. Then install the upper fixing block 7 on top of the upper mold 8 and lower mold 9. The fixing strip 11 connected to it will be inserted into the upper mold 8 and lower mold 9, thereby pushing the connecting strip 12 to rotate inward, causing the fixing post 13 to compress the spring 14, and at the same time causing the locking pin 15 to lock the connecting strip 12, thereby fixing the upper mold 8 and lower mold 9. Then open and close the cover 4 along with the top block. 6. Close the lid to fix the entire mold inside the box 1. Then, introduce the raw material into the feed box 2 and start the equipment for production. At the same time, start the cooling equipment. First, add cooling water into the water storage tank 18 through the water injection pipe 19. Then, start the circulation pump 20 to introduce the cooling water in the water storage tank 18 into the water inlet pipe 21. Then, introduce the cooling water from the water inlet pipe 21 into the cooling pipe 22. After the cooling water in the cooling pipe 22 is cooled by flowing, it is introduced into the return pipe 25 and returns to the water storage tank 18. At the same time, the fan 24 will start to guide the air outward to cool the extruded plastic tube.

[0038] 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 polyethylene plastic pipe extruder comprising a cabinet (1), characterized in that: The box (1) top fixedly connected with the feeding box (2), the box (1) top rotationally connected with the rotating shaft (3), the rotating shaft (3) outer wall rotationally connected with the open-close cover (4), the open-close cover (4) top fixedly connected with the handle (5), the open-close cover (4) bottom fixedly connected with the top block (6), the top block (6) bottom slidably connected with the upper fixed block (7), the upper fixed block (7) bottom slidably connected with the upper mold (8), the upper mold (8) bottom fixedly connected with the lower mold (9), the lower mold (9) bottom fixedly connected with the lower fixed block (10), the upper mold (8) internally fixedly connected with a plurality of fixed strips (11), the upper mold (8) internally provided with a plurality of limiting assemblies, the lower mold (9) internally rotationally connected with a plurality of connecting strips (12), the connecting strip (12) one side provided with a plurality of supporting assemblies. The limiting assembly includes a clamping pin (15), a fixed plate (16) and a spring (17), the clamping pin (15) is slidably connected to the outer wall of the upper mold (8), the fixed plate (16) is fixedly connected to the outer wall of the clamping pin (15), the spring (17) is arranged in the upper mold (8), one end of the spring (17) is fixedly connected to one end of the clamping pin (15), the other end of the spring (17) is fixedly connected to the inner wall of the upper mold (8).

2. A polyethylene plastic pipe extruder as claimed in claim 1, wherein: The supporting assembly includes a fixed column (13) and a spring (14), the fixed column (13) is fixedly connected to one end of the connecting strip (12), the spring (14) is arranged in the lower mold (9), one end of the spring (14) is fixedly connected to one end of the fixed column (13), the other end of the spring (14) is fixedly connected to the inner wall of the lower mold (9).

3. The polyethylene plastic pipe extruder according to claim 1, wherein: The box (1) top fixedly connected with the water storage tank (18), the water storage tank (18) top fixedly connected with the water injection pipe (19).

4. A polyethylene plastic pipe extruder as claimed in claim 3, wherein: The water storage tank (18) one side fixedly connected with the circulating pump (20), the circulating pump (20) one side fixedly connected with the water inlet pipe (21), the circulating pump (20) input end and the water storage tank (18) one side connected, the circulating pump (20) output end and the water inlet pipe (21) connected.

5. A polyethylene plastic pipe extruder as claimed in claim 4, wherein: The water inlet pipe (21) one end fixedly connected with the cooling pipe (22), the cooling pipe (22) one end fixedly connected with the return pipe (25).

6. The polyethylene plastic pipe extruder of claim 1, wherein: The box (1) one side fixedly connected with the cooling box (23), the cooling box (23) outer wall fixedly connected with a plurality of fans (24).

7. A polyethylene plastic pipe extruder as claimed in claim 5 wherein: The cooling pipe (22) is arranged in the cooling box (23) in a ring array, the water inlet pipe (21) and the return pipe (25) are fixedly connected to one side of the cooling pipe (22) in a parallel array.

8. The polyethylene plastic pipe extruder of claim 1, wherein: The upper mold (8) and the lower mold (9) are fixedly connected between the upper fixed block (7) and the lower fixed block (10) in a parallel array, the upper fixed block (7) and the lower fixed block (10) are arranged in the box (1) in a parallel array.

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