PEEK bar extrusion die

Abstract

The utility model relates to the technical field of new materials, and discloses a PEEK bar extrusion die which comprises a die body, a feeding pipe and a plurality of extrusion pipes are arranged at the two ends of the die body respectively, and connecting assemblies are arranged between the die body and the extrusion pipes. And the connecting assembly comprises a sealing disc, a discharging pipe is fixedly connected to the interior of the sealing disc, the end, away from the sealing disc, of the discharging pipe is fixedly connected to the interior of the extrusion pipe, and the sealing disc is in threaded connection with the mold body through a plurality of fixing bolts. According to the utility model, the double-layer surrounding type cooling pipeline is arranged in the mold, so that the rapid directional cooling molding of the molten PEEK material is realized, and a bolt rapid connection structure is adopted, so that the disassembly and replacement of the mold assembly are facilitated, and the molding efficiency and the adaptation flexibility are improved.

Description

Technical Field

[0001] This utility model relates to the field of new materials technology, and in particular to a PEEK rod extrusion die. Background Technology

[0002] PEEK rods are solid rod-shaped materials made of polyetheretherketone (PEEK), a high-performance engineering plastic. PEEK is a thermoplastic with excellent high-temperature resistance, chemical resistance, wear resistance, and high mechanical strength, and is widely used in aerospace, automotive, medical, and electronics industries. PEEK rods are commonly used to manufacture demanding mechanical parts, bearings, seals, and insulating components, and are particularly suitable for applications requiring extreme operating conditions. The material exhibits excellent thermal stability, chemical resistance, and a low coefficient of friction, maintaining stable physical properties even at high temperatures.

[0003] Due to the excellent comprehensive properties of PEEK rods, their application in high-end manufacturing is becoming increasingly widespread, which places higher demands on their molding processes. To achieve continuous, high-quality molding of PEEK materials, extrusion has become one of the mainstream methods. The extrusion die, as a key component of this process, directly affects the dimensional stability, surface quality, and internal density of the rod through its structural design and temperature control precision.

[0004] However, existing PEEK bar extrusion dies mostly employ single or linear cooling channels, resulting in limited cooling efficiency. The molten material cannot achieve rapid and uniform cooling at the die exit, easily leading to surface adhesion or dimensional instability in the bars, thus affecting product quality. Furthermore, existing dies are ill-suited to the production demands of frequent switching between multiple product specifications, limiting further improvements in equipment flexibility and production efficiency.

[0005] To address the above problems, a PEEK bar extrusion die is proposed. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a PEEK bar extrusion die, which aims to solve the problem of surface adhesion in the bars produced by an existing PEEK bar extrusion die.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a PEEK rod extrusion die, comprising a die body, wherein a feed pipe and a plurality of extrusion pipes are respectively provided at both ends of the die body, and a connecting component is provided between the die body and the plurality of extrusion pipes;

[0008] The connecting assembly includes a sealing disc, and a discharge pipe is fixedly connected inside the sealing disc. One end of the discharge pipe away from the sealing disc is fixedly connected inside the extrusion pipe. The sealing disc and the mold body are connected by multiple fixing bolts.

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

[0010] The mold body has a main channel and multiple branch channels inside.

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

[0012] The sealing disc is located at the end of the diversion channel.

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

[0014] The main channel is divided into two flow channels inside the mold body, and both flow channels are connected to the two branch channels.

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

[0016] The mold body has two cooling pipe inlets symmetrically arranged inside, and the two cooling pipe inlets are arranged around the outside of the diversion channel.

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

[0018] One end of the cooling pipe inlet is vertically upward, and the other end of the cooling pipe inlet is provided with a cooling pipe outlet, which faces away from the mold body.

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

[0020] One end of the feed pipe is fixedly connected to the inside of the mold body, and the other end of the feed pipe is provided with a connecting flange.

[0021] As a further description of the above technical solution:

[0022] The connecting flange is connected to the extruder by bolts.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this invention, a double-layered, surrounding cooling pipe is installed inside the extrusion die, evenly distributed along the circumference of the discharge channel to form a highly efficient cooling circuit. Cooling water is continuously circulated and input from an external system, quickly removing the heat generated by the molten PEEK material during the molding process through the cooling pipes. This enables directional cooling immediately as the rod is about to detach from the base die, allowing the extruded material to solidify rapidly, significantly reducing the risk of surface adhesion, and preventing rod deformation or adhesion due to thermal hysteresis, thereby improving the dimensional stability and surface quality of the product.

[0025] 2. In this utility model, the use of bolt quick connection enables convenient disassembly and replacement of mold components, which not only improves the versatility and production flexibility of the mold, but also effectively improves the efficiency of switching between multiple product models. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a PEEK bar extrusion die proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the discharge pipe of a PEEK bar extrusion die proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the cooling pipe outlet of a PEEK bar extrusion die proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the main channel structure of a PEEK bar extrusion die proposed in this utility model.

[0030] Legend:

[0031] 1. Mold body; 11. Diversion channel; 12. Main channel; 2. Feed pipe; 21. Connecting flange; 3. Extrusion pipe; 4. Connecting assembly; 401. Sealing plate; 402. Discharge pipe; 403. Fixing bolt; 5. Cooling pipe inlet; 51. Cooling pipe outlet. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 - Figure 4This utility model provides an embodiment of a PEEK rod extrusion die, comprising a die body 1. The die body 1 has a main flow channel 12 and multiple branch flow channels 11 inside. The main flow channel 12 is divided into two channels inside the die body 1, each channel connecting to one of the branch flow channels 11. This branching design ensures uniform distribution of the molten PEEK material, preventing material accumulation in the channels and maintaining fluidity and consistency. The die body 1 has a feed pipe 2 and multiple extrusion pipes 3 at both ends. One end of the feed pipe 2 is fixedly connected to the inside of the die body 1, and the other end has a connecting flange 21. The connecting flange 21 is bolted to the extruder, ensuring sealing and stability during the feeding process. The multiple extrusion pipes 3 are connected to the main flow channel 12 through the die body 1, extruding the molten material into rods. A connecting assembly 4 is provided between the die body 1 and the multiple extrusion pipes 3. This assembly can be quickly disassembled and replaced during actual production, facilitating die cleaning and maintenance, and also improving the flexibility of the production line and its adaptability to multi-specification production.

[0034] Reference Figure 2 The connecting component 4 includes a sealing disc 401, which is located at the end of the flow distribution channel 11. The sealing disc 401 mainly serves to prevent leakage of molten PEEK material, ensuring stable material flow throughout the extrusion process. An outlet pipe 402 is fixedly connected inside the sealing disc 401. The end of the outlet pipe 402 away from the sealing disc 401 is fixedly connected to the inside of the extrusion pipe 3, ensuring that the molten material smoothly enters the mold outlet and is extruded. The sealing disc 401 is threadedly connected to the mold body 1 by multiple fixing bolts 403. This threaded connection ensures a tight fit between the sealing disc 401 and the mold body 1, preventing any leakage or heat loss under high temperature and high pressure conditions, thus improving the sealing performance and safety of the mold.

[0035] Reference Figure 3 - Figure 4 The mold body 1 has two symmetrically arranged cooling pipe inlets 5 inside. These two cooling pipe inlets 5 surround and are evenly distributed on the outside of the distribution channel 11, ensuring that the coolant can uniformly cool the molten PEEK material. One end of each cooling pipe inlet 5 is vertically upward, which facilitates the smooth entry of coolant through the pipe and ensures that the direction of coolant flow matches the heat flow distribution inside the mold to achieve the best cooling effect. The other end of the cooling pipe inlet 5 is provided with a cooling pipe outlet 51, which faces away from the mold body 1, ensuring that the coolant can carry away the heat generated by the mold and molten PEEK material during the flow process and effectively discharge the heat to the external system.

[0036] Working Principle: During operation, molten PEEK material is first conveyed from the extruder to the die body 1 via the feed pipe 2. The material enters the die structure through the main flow channel 12 inside the die body 1. The main flow channel 12 is divided into two independent channels inside the die, which are connected to multiple branch channels 11, guiding the molten material to multiple discharge directions within the die. A connecting assembly 4 is located at the end of each branch channel 11, including a sealing disc 401 and a discharge pipe 402. One end of the discharge pipe 402 is fixed inside the sealing disc 401, and the other end extends into the inner cavity of the extrusion tube 3. The molten material enters the extrusion tube 3 through the discharge pipe 402. The sealing disc 401 is connected to the die body 1 via multiple fixing bolts 403, forming a connection structure. The mold body 1 has two symmetrical cooling pipe inlets 5 inside. The two cooling pipe inlets 5 surround the outside of the diversion channel 11 and are arranged along the channel path. Cooling water enters the mold cooling system through the vertically upward cooling pipe inlets 5, flows along the flow channel and is discharged from the cooling pipe outlet 51 on the side away from the mold body 1.

[0037] 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 PEEK rod extrusion die comprising a die body (1) characterised in that: The both ends of the mold body (1) are respectively provided with a feeding pipe (2) and a plurality of extrusion pipes (3), a connecting assembly (4) is arranged between the mold body (1) and the plurality of extrusion pipes (3); The connecting assembly (4) comprises a sealing disc (401), the inside of the sealing disc (401) is fixedly connected with a discharging pipe (402), one end of the discharging pipe (402) away from the sealing disc (401) is fixedly connected in the inside of the extrusion pipe (3), and the sealing disc (401) and the mold body (1) are threadedly connected through a plurality of fixing bolts (403).

2. A PEEK rod extrusion die according to claim 1, characterized in that: The inside of the mold body (1) is provided with a main flow channel (12) and a plurality of branch flow channels (11).

3. A PEEK rod extrusion die according to claim 2, characterised in that: The sealing disc (401) is arranged at the end of the branch flow channel (11).

4. A PEEK rod extrusion die according to claim 2, characterized in that: The main flow channel (12) is divided into two flow channels in the inside of the mold body (1), and the two flow channels are connected with the two branch flow channels (11).

5. A PEEK rod extrusion die according to claim 2, characterized in that: The inside of the mold body (1) is symmetrically provided with two cooling pipe inlets (5), and the two cooling pipe inlets (5) are circumferentially arranged outside the branch flow channels (11).

6. A PEEK rod extrusion die according to claim 5, characterised in that: One end of the cooling pipe inlet (5) is vertically upward, the other end of the cooling pipe inlet (5) is provided with a cooling pipe outlet (51), and the cooling pipe outlet (51) is away from the side of the mold body (1).

7. A PEEK rod extrusion die according to claim 1, characterized in that: One end of the feeding pipe (2) is fixedly connected in the inside of the mold body (1), and the other end of the feeding pipe (2) is provided with a connecting flange (21).

8. A PEEK rod extrusion die according to claim 7, characterised in that: The connecting flange (21) is connected with the extruder through bolts.

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