A high-plasticity mold for producing ultra-high molecular weight polyethylene pipes

Abstract

This utility model relates to the field of mold technology and discloses a high-plasticity ultra-high molecular weight polyethylene pipe production mold, including a mold component. The mold component includes a shell part and a core part coaxially arranged. A forming cavity for extrusion is formed between one end of the shell part and the core part. The core part includes a detachably connected movable part and a stepped shaft core. The movable part can reciprocate along the axis of the shell part. The diameter of the stepped shaft core gradually decreases from one end near the movable part to the other end. By setting the shell part and the movable core part, this utility model allows the thickness of the forming cavity between the stepped shaft core and the shell part to be changed by adjusting the position of the stepped shaft core when producing polyethylene pipes. This enables the device to produce polyethylene pipes with different inner diameters without the need for different specifications of molds, thereby increasing the applicability of the device.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold for producing ultra-high molecular weight polyethylene pipes with high plasticizing capacity. Background Technology

[0002] Ultra-high molecular weight polyethylene (UHMWPE), with its molecular weight ranging from 1.5 million to 10 million g / mol, possesses excellent wear resistance, impact resistance, self-lubrication, and chemical corrosion resistance, making it widely used in mining transportation, marine engineering, chemical pipelines, and high-end equipment manufacturing. However, molds used in polyethylene pipe production have certain drawbacks. Existing molds have fixed specifications, and when different inner diameters of polyethylene pipes need to be produced, different mold specifications must be used, resulting in limited equipment usability. Furthermore, because molds wear down during use, they need to be replaced periodically, and existing molds require complete replacement, leading to high maintenance costs. Utility Model Content

[0003] This invention proposes a high-plasticity ultra-high molecular weight polyethylene pipe production mold to solve the problem of high limitations in the use of existing equipment.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high plasticizing capacity ultra-high molecular weight polyethylene pipe production mold, comprising a mold component, the mold component comprising a shell portion and a core portion coaxially arranged, a molding cavity for extrusion is formed between one end of the shell portion and the core portion, the core portion comprising a detachably connected movable part and a stepped shaft core, the movable part being reciprocally movable along the axis of the shell portion, and the diameter of the stepped shaft core gradually decreasing from one end near the movable part to the other end.

[0005] Preferably, the moving part includes a lead screw, the end of the housing portion away from the molding cavity is recessed to form a through hole, the lead screw is screwed into the interior of the through hole, and the end of the stepped shaft mold core near the lead screw is open to form a connecting hole, the connecting hole matching the lead screw.

[0006] Preferably, the housing portion includes a mold shell, one end of which is open to form a mold cavity, and a feed pipe communicating with the mold cavity is fixedly connected to the circumferential surface of the mold shell. The end of the mold shell away from the mold cavity is open to form a through hole, and the lead screw is screwed into the interior of the through hole.

[0007] Preferably, a handwheel is fixedly connected to the end of the lead screw away from the stepped shaft mold core, and the handwheel is located outside the mold cavity.

[0008] Preferably, a cooling component is fixedly connected to the outer peripheral surface of the mold shell, and a water conveying channel for conveying water along a preset path is formed on the cooling component, with the water outlet end of the water conveying channel located on one side of the stepped shaft mold core.

[0009] Preferably, the cooling component includes connecting rods, two connecting rods are symmetrically fixedly connected to the circumferential surface of the mold shell, and a water guide ring is fixedly connected between the two connecting rods. Multiple water spray heads are fixedly connected in a ring array on the water guide ring. The water outlet end of the water spray head is located inside the water guide ring, and a base pipe is fixedly connected between the water inlet ends of the multiple water spray heads. A water inlet pipe is fixedly connected to the circumferential surface of the base pipe.

[0010] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0011] (1) By setting up a shell part and a movable mold core part, when producing polyethylene pipes, the thickness of the forming cavity between the stepped shaft mold core and the shell part can be changed by adjusting the position of the stepped shaft mold core, so that the device can produce polyethylene pipes with different inner diameters without using molds of different specifications, thereby increasing the range of applications of the device.

[0012] (2) By setting the lead screw and connecting hole, the stepped shaft mold core and the lead screw can be detachably connected. When the stepped shaft mold core is excessively worn, only the stepped shaft mold core needs to be replaced. There is no need to replace the entire structure of the device. Therefore, the maintenance cost and maintenance difficulty of the mold are reduced, and the maintenance efficiency of the mold is improved. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is one of the perspective views of this utility model;

[0015] Figure 2 This is a second perspective view of the present utility model;

[0016] Figure 3 This is a perspective view of the present invention with the cooling component removed;

[0017] Figure 4 for Figure 3 A sectional view;

[0018] Figure 5 This is a perspective view of the cooling component of this utility model;

[0019] In the diagram: 1. Mold component; 11. Mold shell; 12. Stepped shaft mold core; 13. Feed pipe; 14. Lead screw; 15. Handwheel; 16. Mold cavity; 17. Connecting hole; 18. Through hole; 2. Cooling component; 21. Water guide ring; 22. Base pipe; 23. Water spray head; 24. Water inlet pipe; 25. Connecting rod. Detailed Implementation

[0020] 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.

[0021] This utility model provides, for example Figures 1-5 The mold shown is for producing ultra-high molecular weight polyethylene pipe with high plasticizing capacity. It includes a mold part 1, which includes a shell part and a core part arranged coaxially. A molding cavity for extrusion is formed between one end of the shell part and the core part. The core part includes a movable part and a stepped shaft core 12 that are detachably connected. The movable part can reciprocate along the axis of the shell part. The diameter of the stepped shaft core 12 gradually decreases from one end near the movable part to the other end.

[0022] With the above technical solution, before producing polyethylene pipes, the device is fixed on the extruder. The moving part is pulled to move relative to the shell part. When the moving part moves, it will synchronously drive the stepped shaft mold core 12 to move to the required position on the shell part. Through the operation of the extruder, the molten raw material enters the interior of the shell part. The shell part and the stepped shaft mold core 12 cooperate to form a polyethylene pipe. The polyethylene pipe is then cooled and shaped in subsequent steps to complete the production of the polyethylene pipe. When it is necessary to produce polyethylene pipes of different diameters, it is only necessary to pull the stepped shaft mold core 12 and the moving part to produce polyethylene pipes with different inner diameters, thereby improving the application range of the device.

[0023] Specifically, in one embodiment, regarding the aforementioned moving part, such as Figures 1-4 As shown, the moving part includes a lead screw 14, and the end of the housing part away from the molding cavity is recessed to form a through hole 18. The lead screw 14 is screwed into the inside of the through hole 18. The stepped shaft mold core 12 is open at the end near the lead screw 14 to form a connecting hole 17, which matches the lead screw 14.

[0024] In this embodiment, when the position of the stepped shaft mold core 12 needs to be adjusted, the lead screw 14 is rotated so that the lead screw 14 rotates relative to the through hole 18 on the housing part, and the lead screw 14 moves synchronously when it rotates. When the lead screw 14 moves, it drives the stepped shaft mold core 12 to move, thereby adjusting the position of the stepped shaft mold core 12. When the stepped shaft mold core 12 is excessively worn and needs to be replaced, the stepped shaft mold core 12 is reversed so that the stepped shaft mold core 12 moves relative to the lead screw 14 until the connecting hole 17 is separated from the lead screw 14, thereby disassembling the excessively worn stepped shaft mold core 12. Then, the intact stepped shaft mold core 12 is screwed to the lead screw 14 through the connecting hole 17 to complete the replacement of the stepped shaft mold core 12.

[0025] Specifically, in one embodiment, regarding the aforementioned housing portion, such as Figures 1-4 As shown, the housing part includes a mold shell 11, one end of the mold shell 11 is open to form a mold cavity 16, and a feed pipe 13 communicating with the mold cavity 16 is fixedly connected to the circumferential surface of the mold shell 11. The end of the mold shell 11 away from the mold cavity 16 is open to form a through hole 18, and the lead screw 14 is screwed into the inside of the through hole 18.

[0026] In this embodiment, before producing polyethylene pipe, the mold shell 11 is fixed to the discharge end of the extruder, and the lead screw 14 is rotated to move relative to the through hole 18. When the lead screw 14 moves, it will drive the stepped shaft mold core 12 to move synchronously. After the position of the stepped shaft mold core 12 is adjusted, the raw material is injected into the mold shell 11 through the extruder. The stepped shaft mold core 12 and the mold cavity 16 inside the mold shell 11 cooperate to form a polyethylene pipe.

[0027] To facilitate the rotation of the lead screw 14, such as... Figures 1-4 As shown, a handwheel 15 is fixedly connected to one end of the lead screw 14 away from the stepped shaft mold core 12. The handwheel 15 is located outside the mold cavity 16. When it is necessary to rotate the lead screw 14, the handwheel 15 is used to facilitate the rotation of the lead screw 14.

[0028] After the polyethylene pipe is formed, in order to cool the polyethylene pipe, such as... Figures 1-2 As shown, a cooling component 2 is fixedly connected to the outer peripheral surface of the mold shell 11. A water conveying channel for conveying water along a preset path is formed on the cooling component 2, and the water outlet end of the water conveying channel is located on one side of the stepped shaft mold core 12.

[0029] In this embodiment, before the device starts production, the pipe for conveying water is connected to the cooling component 2. When the polyethylene pipe is discharged from one end of the mold shell 11, water is conveyed through the water supply channel on the cooling component 2 and sprayed onto the polyethylene pipe to cool and shape it.

[0030] Specifically, in one embodiment, regarding the aforementioned cooling element 2, as... Figure 1 , Figure 2 and Figure 5 As shown, the cooling component 2 includes connecting rods 25. Two connecting rods 25 are symmetrically fixedly connected to the circumferential surface of the mold shell 11, and a water guide ring 21 is fixedly connected between the two connecting rods 25. Multiple water spray heads 23 are fixedly connected in a ring array on the water guide ring 21. The water outlet end of the water spray head 23 is located inside the water guide ring 21, and a base pipe 22 is fixedly connected between the water inlet ends of the multiple water spray heads 23. A water inlet pipe 24 is fixedly connected to the circumferential surface of the base pipe 22.

[0031] In this embodiment, the water delivery pipe is connected to the water inlet pipe 24. After the polyethylene pipe is discharged from the mold shell 11, water is input through the water inlet pipe 24. After the water is delivered to the base pipe 22, it is guided to flow into the spray head 23 through the base pipe 22. The water is sprayed onto the polyethylene pipe through the spray head 23, thereby cooling and shaping the polyethylene pipe.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 high plasticizing capacity, ultra-high molecular weight polyethylene pipe production mold comprising a mold piece (1) which comprises a housing part and a core part disposed coaxially, a forming cavity for extrusion is formed between one end of the housing part and the core part, characterized in that: The mold core portion includes a detachably connected movable part and a stepped shaft mold core (12). The movable part can reciprocate along the axis of the housing portion, and the diameter of the stepped shaft mold core (12) gradually decreases from one end near the movable part to the other end.

2. The mold for producing a pipe of ultra-high molecular polyethylene having a high plasticizing ability according to claim 1, wherein: The moving part includes a lead screw (14), and the end of the housing portion away from the molding cavity is recessed to form a through hole (18). The lead screw (14) is screwed into the interior of the through hole (18). The end of the stepped shaft mold core (12) near the lead screw (14) is open to form a connecting hole (17). The connecting hole (17) matches the lead screw (14).

3. The high plasticizing capacity ultra-high molecular weight polyethylene pipe production mold according to claim 2, characterized in that: The housing part includes a mold shell (11), one end of which is open to form a mold cavity (16), and a feed pipe (13) connected to the mold cavity (16) is fixedly connected to the circumferential surface of the mold shell (11). The end of the mold shell (11) away from the mold cavity (16) is open to form a through hole (18), and the lead screw (14) is screwed into the inside of the through hole (18).

4. The mold for producing a pipe of ultra-high molecular polyethylene having a high plasticizing ability according to claim 3, wherein: A handwheel (15) is fixedly connected to one end of the lead screw (14) away from the stepped shaft mold core (12), and the handwheel (15) is located outside the mold cavity (16).

5. A high plasticity capacity ultra-high molecular weight polyethylene pipe production mold according to claim 3 or 4, characterized in that: A cooling component (2) is fixedly connected to the outer peripheral surface of the mold shell (11). A water conveying channel for conveying water along a preset path is formed on the cooling component (2). The water outlet end of the water conveying channel is located on one side of the stepped shaft mold core (12).

6. The high plasticizing capacity ultra-high molecular weight polyethylene pipe production mold according to claim 5, characterized in that: The cooling component (2) includes connecting rods (25), two connecting rods (25) are symmetrically fixedly connected to the circumferential surface of the mold shell (11), and a water guide ring (21) is fixedly connected between the two connecting rods (25). Multiple water spray heads (23) are fixedly connected in a ring array on the water guide ring (21). The water outlet end of the water spray head (23) is located inside the water guide ring (21), and a base pipe (22) is fixedly connected between the water inlet ends of the multiple water spray heads (23). A water inlet pipe (24) is fixedly connected to the circumferential surface of the base pipe (22).

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