A plastic pipe mold

Abstract

This utility model discloses a plastic pipe mold, comprising: a mold core with a cavity inside; a water channel system distributed in a ring-shaped spiral within the cavity; a gate located at the feed end of the cavity; and a cold slug well connected to the gate. The transition area between the gate and the cold slug well adopts an R-angle structure, and the R-angle value ranges from 2mm to 5mm. The beneficial effects of this utility model are: by setting up a spiral water channel system, the cooling of the product during injection molding is more uniform, the cooling time is reduced, and production efficiency is improved; the R-angle transition between the cold slug well and the gate makes the melt flow smoother and reduces shear force.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a plastic pipe mold. Background Technology

[0002] Polyetheretherketone (PEEK) is a high-performance thermoplastic commonly used in demanding industrial environments, such as medical devices, automotive, and aerospace. PEEK exhibits exceptional high-temperature resistance, with a long-term operating temperature up to 260°C, which is crucial for applications in high-temperature environments. Its high mechanical strength, abrasion resistance, and creep resistance make it suitable for high-load applications. Strong chemical stability, resisting various corrosive media, may be attractive for chemical or medical equipment. Biocompatibility is also critical, especially in the medical field, requiring compliance with relevant certifications. Furthermore, PEEK possesses excellent insulation properties, making it suitable for the electronics and electrical industries.

[0003] However, PEEK products are costly due to expensive raw materials, demanding processing equipment, a melting point of 343℃, and being a semi-crystalline material with high melt viscosity and poor fluidity, making it prone to internal stress and shrinkage. Therefore, careful attention must be paid to the location and size of the gate during mold design. Molding requires high temperature and pressure, making processing very difficult and placing high demands on mold design and process control, potentially leading to challenges in production. Utility Model Content

[0004] The purpose of this utility model is to provide a plastic pipe mold to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water system, disposed within the cavity, comprising a main body and a plurality of spiral grooves distributed vertically on the outer wall of the main body;

[0006] The injection port is located at the feed end of the cavity;

[0007] The cold material well is connected to the glue outlet;

[0008] The transition area between the glue outlet and the cold material well adopts an R-angle structure, and the value of the R-angle is between 2mm and 5mm.

[0009] Preferably, the center of the column is provided with an axially distributed channel, and the top end of the channel is connected to the groove at the top end through a drainage groove.

[0010] Preferably, the bottom end of the column is provided with radially distributed diversion holes, which are connected to the channel.

[0011] Preferably, the inlet includes a base plate and a tube disposed at the center of the base plate, the bottom end of the tube penetrating the base plate and being tapered, and the base plate having at least three heat dissipation holes.

[0012] Preferably, the mold core is made of hot work die steel with a hardness HRC between 48 and 52.

[0013] Preferably, the surface of the cavity is provided with a nitriding layer, the thickness of which is between 0.3 mm and 0.5 mm.

[0014] Preferably, the mold is suitable for polyaryletherketone and polyethersulfone engineering plastics, specifically including PEEK, PEK, PPSU, PESU, PSU, and PEI.

[0015] Compared with the prior art, the beneficial effects of this utility model are: by setting up a spiral water channel system, this utility model makes the cooling of the product more uniform during the injection molding process, reduces the cooling time, and improves production efficiency; the cold slug well and the gate adopt an R-angle transition, which makes the melt flow smoother and reduces the shear force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1 Sectional view of AA;

[0018] Figure 3 This is a schematic diagram of the water system structure of this utility model;

[0019] Figure 4 This is a top view of the water system of this utility model;

[0020] Figure 5 This is a structural diagram of the glue joint of this utility model;

[0021] Figure 6 This is a schematic diagram of the heat dissipation holes of this utility model.

[0022] In the diagram: 100, mold core; 101, cavity; 200, water system; 201, column; 202, groove; 203, channel; 204, diversion hole; 205, drainage groove; 300, glue outlet; 301, base plate; 302, glue tube; 400, cold sluice well. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1 to 6This utility model provides a technical solution: a plastic pipe mold, comprising:

[0025] Mold core 100, which has a cavity 101 inside;

[0026] A water system 200 is provided in the cavity 101, including a main body 201 and a plurality of spiral grooves 202 distributed on the upper and lower outer wall of the main body 201;

[0027] The injection port 300 is located at the feed end of the cavity 101;

[0028] The cold material well 400 is connected to the glue outlet 300;

[0029] The transition area between the glue outlet 300 and the cold material well 400 adopts an R-angle structure 500, and the value of the R-angle is between 2mm and 5mm.

[0030] In an embodiment of this utility model, the water system includes a column 201, the peripheral wall of the column 201 is provided with a groove 202, a plurality of grooves 202 are distributed vertically along the same side of the main body 201, the grooves 202 are spiral, and the center of the column 201 is provided with an axially distributed channel 203, the top end of the channel 203 is connected to the groove 202 through a drainage groove 205.

[0031] In an embodiment of this utility model, the bottom end of the column 201 is provided with radially distributed diversion holes 204, and the diversion holes 204 are connected to the channel 203.

[0032] In an embodiment of this utility model, the glue outlet 300 includes a base plate 301 and a glue tube 302 disposed at the center of the base plate 301. The bottom end of the glue tube 302 penetrates the base plate 301 and is tapered.

[0033] In an embodiment of this utility model, the mold core 100 is made of hot work die steel with a hardness HRC between 48 and 52.

[0034] In an embodiment of this utility model, the surface of the cavity 101 is provided with a nitriding layer, the thickness of which is between 0.3 mm and 0.5 mm.

[0035] In embodiments of this utility model, the mold is applicable to polyaryletherketone and polyethersulfone engineering plastics, specifically including PEEK, PEK, PPSU, PESU, PSU, and PEI.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic pipe mold, characterized in that, include: Mold core (100), the mold core having a cavity (101) inside; The water system (200) is located in the cavity (101) and includes a main body (201) and a plurality of spiral grooves (202) distributed on the upper and lower sides of the outer wall of the main body (201). The injection port (300) is located at the feed end of the cavity (101); The cold material well (400) is connected to the glue outlet (300); The transition area between the glue outlet (300) and the cold material well (400) adopts an R-angle structure, and the value of the R-angle is between 2mm and 5mm.

2. The plastic pipe mold according to claim 1, characterized in that: The main body (201) has an axially distributed channel (203) at its center, and the top of the channel (203) is connected to the groove (202) at the top through a drainage groove (205).

3. A plastic pipe mold according to claim 2, characterized in that: The bottom end of the main body (201) is provided with radially distributed diversion holes (204), which are connected to the channel (203).

4. A plastic pipe mold according to claim 3, characterized in that: The inlet (300) includes a base plate (301) and a tube (302) located at the center of the base plate (301). The bottom end of the tube (302) penetrates the base plate (301) and is tapered. The base plate (301) is provided with at least three heat dissipation holes (304).

5. A plastic pipe mold according to claim 1, characterized in that: The mold core (100) is made of hot work die steel with a hardness HRC between 48 and 52.

6. A plastic pipe mold according to claim 1, characterized in that: The surface of the cavity (101) is provided with a nitriding layer, the thickness of which is between 0.3 mm and 0.5 mm.

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