Hollow polyolefin plastic particle forming die head

Abstract

The utility model relates to the technical field of plastic forming, and discloses a hollow polyolefin plastic particle forming die head which comprises a die head body, one side of the die head body is fixedly connected with a fixing ring, one side of the fixing ring is fixedly connected with an installation ring, a sealing ring is arranged on the inner wall of the installation ring, and an extrusion pipe is arranged in the installation ring. A sealing ring is arranged at one end of the extrusion pipe, clamping grooves are formed in the two sides of the extrusion pipe, and a dismounting assembly is arranged on the upper surface of the mounting ring; the dismounting and mounting assembly comprises a protective shell which is fixedly connected to the upper surface of the mounting ring. According to the utility model, the die head is convenient to disassemble, assemble and replace without screwing a plurality of bolts and nuts, so that the working time and downtime required for replacing the die head are reduced, the efficiency of disassembling and assembling the die head is improved, and molten granular plastic particles are convenient to filter; the phenomenon that the quality of an extruded finished product is reduced due to non-uniform melting of plastic particles or miscellaneous particles is reduced, and meanwhile, the filter plate is convenient to disassemble.

Description

Technical Field

[0001] This utility model relates to the field of plastic molding technology, and in particular to a molding die for hollow polyolefin plastic particles. Background Technology

[0002] Hollow polyolefin plastic particles are a special type of polyolefin plastic granules. These particles can be processed into hollow plastic products, possessing good toughness and flexibility, while also having a certain degree of hardness and strength. They are processed through an extrusion and blow molding process. This process first heats and melts the plastic particles, then extrudes them into a tubular film through an extruder, and then blow-forms them into hollow plastic products in a mold. The plastic particle forming die is an important component in the plastic extrusion molding process, mainly used to control the shape and size of the extrudate. It is widely used in the production of various plastic products, such as pipes, rods, sheets, plates, meshes, monofilaments, granules, and various profiles.

[0003] A search revealed that Chinese patent CN216708301U discloses a hollow plastic particle molding die head. Addressing the common problem of clogging during hollow particle molding with existing dies, which hinders maintenance and often necessitates complete die head replacement, resulting in significant losses, this patent proposes a solution. A steel rod is embedded at the lower end of the die head body, with an X-shaped limiting frame controlling its position to prevent movement. When molten plastic is extruded into the second extrusion hole, the X-shaped limiting frame does not obstruct its entry. The steel rod helps form a hollow shape in the plastic. When clogging occurs, simply removing and cleaning or replacing the clogged steel rod significantly reduces costs and simplifies operation.

[0004] The aforementioned plastic particle molding die head facilitates cleaning of blockages during use. However, in existing technologies, the die head is typically connected to the extrusion tube by tightening multiple bolts and nuts via a connecting disc. After prolonged use, the die head is prone to damage and blockage, requiring the loosening of multiple bolts and nuts to disassemble it. This cumbersome and complex disassembly process increases the working time required for die head removal, reduces the efficiency of die head replacement, and increases downtime, hindering the timely use of the die head. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hollow polyolefin plastic particle molding die.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a hollow polyolefin plastic particle molding die head, comprising a die head body, a fixing ring fixedly connected to one side of the die head body, an installation ring fixedly connected to one side of the fixing ring, a sealing ring provided on the inner wall of the installation ring, an extrusion tube provided inside the installation ring, a sealing ring provided at one end of the extrusion tube, slots provided on both sides of the extrusion tube, and a disassembly assembly provided on the upper surface of the installation ring;

[0007] The disassembly and assembly assembly includes a protective shell, which is fixedly connected to the upper surface of the mounting ring.

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

[0009] The protective shell is internally rotatably connected to a bidirectional stud. Two through slots are opened on both sides of the protective shell. Two movable blocks are externally threaded to the bidirectional stud. An arc-shaped rod is fixedly connected to one side of the movable block, and a connecting block is fixedly connected to one end of the arc-shaped rod.

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

[0011] Two connecting rods are fixedly connected to one side of the connecting block, and a limit block is fixedly connected to one end of each of the two connecting rods. Fixing boxes are fixedly connected to both sides of the mounting ring. The two connecting rods are slidably connected to one side of the fixing box. Two springs are fixedly connected to one side of the limit block. The two springs are fixedly connected to the inner wall of the fixing box. A first knob is fixedly connected to one end of the bidirectional stud.

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

[0013] A filter assembly is provided inside the fixed ring. The filter assembly includes a filter plate, which is disposed inside the fixed ring. A handle is fixedly connected to the middle of the filter plate.

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

[0015] The fixing ring has through holes and threaded holes on both sides, with the threaded holes located below the through holes. The fixing ring also has storage grooves on both sides of its inner wall.

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

[0017] The through hole has a sliding connection to a limit rod, and the threaded hole has a threaded connection to a screw.

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

[0019] One end of the screw is fixedly connected to a second knob, and the other end of the screw is rotatably connected to a limiting shell.

[0020] This utility model has the following beneficial effects:

[0021] 1. This utility model, through the design of the disassembly and assembly components, facilitates the timely disassembly and replacement of the plastic particle molding die head. This helps to replace the die head promptly when it becomes dirty or damaged, without having to tighten multiple bolts and nuts, thus reducing the working time and downtime during die head replacement and improving the efficiency of die head disassembly and assembly, and making it easier to use the die head in a timely manner.

[0022] 2. By setting up a filter component, this utility model increases the ability of the plastic particle forming die to filter the melted plastic particles, reducing the phenomenon of uneven melting of plastic particles and the extrusion of impurities that reduce the quality of the extruded product. It also facilitates the disassembly of the filter plate, which helps to clean and replace the filter plate and reduces the phenomenon of filter plate blockage that makes it difficult to discharge material. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the card slot structure proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the protective shell structure proposed in this utility model;

[0026] Figure 4 This is a schematic diagram of the mounting ring structure proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the limiting block structure proposed in this utility model;

[0028] Figure 6 This is a schematic diagram of the arc-shaped rod structure proposed in this utility model;

[0029] Figure 7 This is a schematic diagram of the filter plate structure proposed in this utility model;

[0030] Figure 8 This is a schematic diagram of the fixing ring structure proposed in this utility model;

[0031] Figure 9 This is a schematic diagram of the limiting shell structure proposed in this utility model.

[0032] Legend:

[0033] 1. Die head body; 2. Fixing ring; 3. Mounting ring; 4. Sealing ring; 5. Extrusion tube; 6. Sealing ring; 7. Slot; 8. Protective shell; 9. Two-way stud; 10. Through groove; 11. Moving block; 12. Arc rod; 13. Connecting block; 14. Connecting rod; 15. Limiting block; 16. Fixing box; 17. Spring; 18. First knob; 19. Through hole; 20. Threaded hole; 21. Storage groove; 22. Limiting rod; 23. Screw; 24. Second knob; 25. Limiting shell; 26. Filter plate; 27. Pull handle. Detailed Implementation

[0034] 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.

[0035] As attached Figure 1-9 As shown, one embodiment of this utility model provides a hollow polyolefin plastic particle molding die head, including a die head body 1. A fixing ring 2 is fixedly connected to one side of the die head body 1, and an installation ring 3 is fixedly connected to one side of the fixing ring 2. A sealing ring 4 is provided on the inner wall of the installation ring 3, and an extrusion tube 5 is provided inside the installation ring 3. A sealing ring 6 is provided at one end of the extrusion tube 5, and slots 7 are provided on both sides of the extrusion tube 5. A disassembly and assembly assembly is provided on the upper surface of the installation ring 3. The fixing ring 2 is used to install a filter plate 26, and the tight fit between the sealing ring 4 and the sealing ring 6 facilitates the improvement of the sealing performance of the connection between the installation ring 3 and the extrusion tube 5.

[0036] The assembly and disassembly components include a protective housing 8, which is fixedly connected to the upper surface of the mounting ring 3.

[0037] As attached Figure 5As shown, a bidirectional stud 9 is rotatably connected inside the protective shell 8. Two through slots 10 are opened on both sides of the protective shell 8. Two moving blocks 11 are threaded to the outside of the bidirectional stud 9. An arc-shaped rod 12 is fixedly connected to one side of the moving block 11. A connecting block 13 is fixedly connected to one end of the arc-shaped rod 12. Two connecting rods 14 are fixedly connected to one side of the connecting block 13. A limit block 15 is fixedly connected to one end of the two connecting rods 14. Fixed boxes 16 are fixedly connected to both sides of the mounting ring 3. The two connecting rods 14 are slidably connected to one side of the fixed box 16. Two springs 17 are fixedly connected to one side of the limit block 15. The two springs 17 are fixedly connected to the inner wall of the fixed box 16. A first knob 18 is fixedly connected to one end of the bidirectional stud 9. The two ends of the bidirectional stud 9 are set with threads in opposite directions. The moving block 11 is used to drive the arc-shaped rod 12 to move. The connecting rod 14 is used to drive the limit block 15 to move under the action of the spring 17. The spring 17 provides elastic pushing force to the limit block 15 into the slot 7.

[0038] As attached Figure 7 As shown, a filter assembly is provided inside the fixed ring 2. The filter assembly includes a filter plate 26, which is located inside the fixed ring 2. A handle 27 is fixedly connected to the middle of the filter plate 26. The filter plate 26 facilitates the filtration of particulate impurities inside the extrudate. The handle 27 is used to pull the filter plate 26.

[0039] As attached Figure 8 As shown, the fixed ring 2 has a through hole 19 and a threaded hole 20 on both sides, respectively. The threaded hole 20 is located below the through hole 19. The inner wall of the fixed ring 2 has a storage groove 21 on both sides, which is used to store the limiting shell 25.

[0040] As attached Figure 7 As shown, a limiting rod 22 is slidably connected inside the through hole 19, and a screw 23 is threadedly connected inside the threaded hole 20. One end of the screw 23 is fixedly connected to a second knob 24, and the other end of the screw 23 is rotatably connected to a limiting shell 25. The limiting rod 22 can play a role in limiting and stabilizing the limiting shell 25 when the screw 23 drives the limiting shell 25 to move.

[0041] Working principle: When disassembling the die head body 1, first turn the first knob 18 to drive the bidirectional stud 9 to rotate. Under the action of the opposite threads at both ends of the bidirectional stud 9, the bidirectional stud 9 drives the two moving blocks 11 to move away from each other when rotating, so that the moving blocks 11 drive the two arc rods 12 to move, so that the arc rods 12 drive the connecting block 13, and thus, under the connection of the connecting rod 14, drive the limiting block 15 to move, so that the limiting block 15 disengages from the inside of the slot 7 and moves into the inside of the fixed box 16. At this time, the spring 17 is compressed, thereby releasing the limit of the extrusion tube 5. Then, the extrusion tube 5 is taken out from the inside of the mounting ring 3, so that the die head and the extrusion tube 5 can be disassembled and separated.

[0042] Before the molten material enters the die head body 1, it first passes through the filter plate 26. The filter plate 26 blocks the particles in the molten material for filtration. When disassembling the filter plate 26, turn the second knob 24 to drive the screw 23 to rotate. The movement of the screw 23 inside the threaded hole 20 drives the limiting shell 25 to move into the recycling tank 21, thereby releasing the limiting of the filter plate 26. Then, hold the pull handle 27 to remove the filter plate 26 from the inside of the fixing ring 2, which facilitates the cleaning and maintenance of the filter plate 26. The operation is reversed during installation.

[0043] 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 hollow polyolefin plastic particle molding die head, comprising a die head body (1), wherein a fixing ring (2) is fixedly connected to one side of the die head body (1), characterized in that: A mounting ring (3) is fixedly connected to one side of the fixing ring (2). A sealing ring (4) is provided on the inner wall of the mounting ring (3). An extrusion tube (5) is provided inside the mounting ring (3). A sealing ring (6) is provided at one end of the extrusion tube (5). A slot (7) is provided on both sides of the extrusion tube (5). A disassembly assembly is provided on the upper surface of the mounting ring (3). The disassembly and assembly assembly includes a protective shell (8), which is fixedly connected to the upper surface of the mounting ring (3).

2. The hollow polyolefin plastic particle molding die head according to claim 1, characterized in that: The protective shell (8) is rotatably connected to a bidirectional stud (9). Two through slots (10) are opened on both sides of the protective shell (8). Two moving blocks (11) are threadedly connected to the outside of the bidirectional stud (9). An arc-shaped rod (12) is fixedly connected to one side of the moving block (11). A connecting block (13) is fixedly connected to one end of the arc-shaped rod (12).

3. The hollow polyolefin plastic particle molding die head according to claim 2, characterized in that: Two connecting rods (14) are fixedly connected to one side of the connecting block (13), and a limit block (15) is fixedly connected to one end of the two connecting rods (14). A fixing box (16) is fixedly connected to both sides of the mounting ring (3). The two connecting rods (14) are slidably connected to one side of the fixing box (16). Two springs (17) are fixedly connected to one side of the limit block (15). The two springs (17) are fixedly connected to the inner wall of the fixing box (16). A first knob (18) is fixedly connected to one end of the bidirectional stud (9).

4. The hollow polyolefin plastic particle molding die head according to claim 1, characterized in that: The fixed ring (2) is provided with a filter assembly inside. The filter assembly includes a filter plate (26). The filter plate (26) is located inside the fixed ring (2). A handle (27) is fixedly connected to the middle of the filter plate (26).

5. The hollow polyolefin plastic particle molding die head according to claim 1, characterized in that: The fixing ring (2) has a through hole (19) and a threaded hole (20) on both sides respectively. The threaded hole (20) is located below the through hole (19). The inner wall of the fixing ring (2) has a storage groove (21) on both sides respectively.

6. The hollow polyolefin plastic particle molding die head according to claim 5, characterized in that: The through hole (19) has a sliding connection to a limit rod (22), and the threaded hole (20) has a threaded connection to a screw (23).

7. The hollow polyolefin plastic particle molding die head according to claim 6, characterized in that: One end of the screw (23) is fixedly connected to a second knob (24), and the other end of the screw (23) is rotatably connected to a limiting shell (25).

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