PEEK material extrusion die

Abstract

The utility model discloses a PEEK (Polyether Ether Ketone) material extrusion die. The PEEK material extrusion die comprises a pre-cooling body and a flow dividing body, wherein the pre-cooling body is used for cooling PEEK melt; the flow dividing body is detachably arranged on the pre-cooling body; a connecting groove connected with an extruder is formed in the pre-cooling body; a first melt runner is arranged in the pre-cooling body and / or the flow dividing body, and the first melt runner is of a structure with a narrow inlet and a wide outlet; an inlet of the first melt runner is communicated with the connecting groove; a plurality of second melt runners are arranged in the flow dividing body, and each second melt runner is of a structure with a narrow inlet and a wide outlet; an inlet of the second melt flow channel communicates with an outlet of the first melt flow channel, and an outlet of the second melt flow channel extends out of the flow dividing body. According to the extrusion die disclosed by the utility model, the tapered runner structure design is adopted, so that the flowability and the mixing effect of a PEEK material in the die are effectively improved, and the uniformity and the consistency of a PEEK profile are improved; and a split type structural design is adopted, so that disassembly and maintenance are convenient, and the production cost and the maintenance difficulty are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of special engineering plastics (PEEK), in particular to a PEEK material extrusion die. Background Art

[0002] As a high-performance special engineering plastic, PEEK has been widely used in aerospace, automotive, medical and other fields due to its excellent mechanical properties, chemical stability, high temperature resistance and other characteristics. However, in the processing of PEEK materials, the traditional mold runner structure often leads to problems such as uneven material flow and unstable temperature control, thus affecting the molding quality and performance of PEEK profiles. Therefore, optimizing and innovating the runner structure of PEEK profile molds is of great significance to improving the quality and performance of PEEK profiles. Utility Model Content

[0003] The purpose of the utility model is to design a new type of PEEK material extrusion die to effectively solve the problems that the traditional mold flow channel structure will cause uneven flow of PEEK material and unstable temperature control, thereby affecting the molding quality and performance of PEEK profiles.

[0004] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0005] The utility model designs a PEEK material extrusion die, and the extrusion die comprises: a precooling body for cooling a melt formed by melting the PEEK material and a flow divider detachably arranged on the precooling body; the precooling body is provided with a connecting groove for connecting an extrusion port on an extruder; a first melt flow channel is provided in the precooling body and / or the flow divider, and the first melt flow channel presents a structure with a narrow inlet and a wide outlet; the inlet of the first melt flow channel is connected to the connecting groove; a plurality of second melt flow channels are provided in the flow divider, and the second melt flow channels are arranged with a structure with a narrow inlet and a wide outlet; the inlets of the plurality of second melt flow channels are all connected with the outlet of the first melt flow channel, and the outlets thereof extend to the outside of the flow divider.

[0006] Furthermore, a PEEK material extrusion die: the first melt flow channel is simultaneously arranged in the pre-cooling body and the flow divider; a first groove is arranged in the pre-cooling body, and a second groove is arranged in the flow divider; the first groove and the second groove are spliced ​​to form the outlet part structure of the first melt flow channel.

[0007] Furthermore, a PEEK material extrusion die: the first melt flow channel is also provided with a diverter cone structure for evenly dispersing the PEEK melt in the first melt flow channel.

[0008] Furthermore, a PEEK material extrusion die: the diverter cone structure is arranged near the middle of the first melt flow channel outlet, and is used to disperse the PEEK melt to both sides of the first melt flow channel outlet.

[0009] Furthermore, a PEEK material extrusion die: the outlet of the second melt flow channel is configured as a bell-mouth structure.

[0010] Furthermore, a PEEK material extrusion die: the extrusion die also includes a temperature sensing element and a heating element for real-time monitoring and regulating the temperature inside the extrusion die.

[0011] Specifically, the design concept of the PEEK material extrusion die of the utility model is as follows: (1) The PEEK material extrusion die structure designed by the utility model improves the fluidity and temperature control of the PEEK material in the die by optimizing the flow channel structure design in the die, thereby improving the quality and performance of the PEEK profile. (2) The PEEK material extrusion die structure designed by the utility model adopts a split structure design, which is easy to disassemble and maintain. The mold is designed with a multi-layer flow channel structure, which further improves the uniformity and stability of the PEEK material flow. (3) In the structural design of the utility model, in view of the problems that the traditional mold flow channel structure is prone to cause uneven material flow and unstable temperature control, an innovative mold flow channel structure design scheme is adopted. The scheme adopts a tapered flow channel structure design, that is, a smaller cross-sectional area is set at the flow channel inlet, and as the flow channel extends toward the outlet, the cross-sectional area gradually decreases and increases. This structural design can effectively increase the flow rate of the PEEK material in the flow channel, promote the full mixing and uniform flow of the material, and thus solve the problems existing in the traditional flow channel structure. (4) The PEEK material extrusion die designed by the utility model is also equipped with a temperature sensing element and a heating element inside the die to monitor and control the temperature inside the die in real time. By accurately controlling the temperature of the die, problems such as uneven melting and inconsistent crystallinity of the material during processing can be avoided, thereby effectively improving the quality and performance of the PEEK profile. (5) Preferably, the mold manufacturing material of the utility model can be selected from highly wear-resistant and corrosion-resistant mold materials, such as tungsten carbide, ceramics, etc., to improve the service life and stability of the mold.

[0012] Beneficial effects of the utility model:

[0013] (1) The PEEK material extrusion die designed by the utility model adopts a tapered flow channel structure design, which effectively improves the fluidity and mixing effect of the PEEK material in the die, and improves the uniformity and consistency of the PEEK profile. The extrusion die structure designed by the utility model also optimizes the temperature control system by setting temperature sensing elements and heating elements, thereby achieving precise control of the temperature inside the die, avoiding problems such as uneven material melting and inconsistent crystallinity, and further improving the quality and performance of the PEEK profile.

[0014] (2) The PEEK material extrusion die designed by the utility model adopts a split structure design, which is easy to disassemble and maintain, reducing production costs and maintenance difficulties. At the same time, the utility model sets the first and second grooves on the pre-cooling body and the flow divider, respectively, so that the outlet part of the first melt flow channel is formed by splicing the first groove and the second groove. In this way, after the pre-cooling body and the flow divider are separated, the inside of the first melt flow channel can be easily cleaned, which can avoid the introduction of impurities and help improve the quality of the PEEK profile.

[0015] (3) With regard to the structural design of the first melt flow channel and the second melt flow channel in the present invention, both are designed with a narrow inlet and a wide outlet. In the process of the PEEK melt flowing from the first melt flow channel to the second melt flow channel, the PEEK melt flows from the outlet of the first melt flow channel with a larger cross-sectional area to the second melt flow channel with a smaller cross-sectional area, and the cross-sectional area thereof becomes smaller. This tapered flow channel structure can effectively increase the flow rate of the PEEK melt material in the flow channel and promote full mixing and uniform flow of the material.

[0016] (4) The beneficial effect of the utility model also lies in that a diverter cone structure is provided in the first melt flow channel, and the PEEK melt entering the flow channel can be dispersed to both sides of the flow channel outlet by utilizing this structure, so that the PEEK melt in the first melt flow channel can flow into the second melt flow channel more evenly, which is beneficial to promoting sufficient mixing and uniform flow of the materials.

[0017] (5) The utility model also designs the outlet of the second melt flow channel to be a trumpet-shaped structure that is wider than the inlet, which can disperse the stress of the outflowing PEEK melt to avoid the problem of performance degradation of the PEEK profile caused by stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a PEEK material extrusion die designed for Example 1;

[0020] Figure 2 It is a schematic structural diagram of the pre-cooling body in Example 1;

[0021] Figure 3 Schematic diagram of the structure of the fluid distributor in Example 1.

[0022] Markings in the figure: 1-precooling body, 2-distributor body, 3-first melt flow channel, 11-connecting groove, 12-first groove, 21-second melt flow channel, 22-second groove, 31-distributor cone structure, 4-temperature sensing element. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom" and the like indicate positions or positional relationships, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second" and the like are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein.

[0025] Example 1

[0026] like Figures 1 to 3 As shown, this embodiment 1 designs a PEEK material extrusion die, which includes: a pre-cooling body 1 for cooling a melt formed by melting the PEEK material and a flow divider 2 detachably arranged on the pre-cooling body 1;

[0027] The pre-cooling body 1 is provided with a connecting groove 11, which is used to connect with the extrusion port on the extruder, so as to guide the PEEK melt formed by melting in the extruder into the pre-cooling body 1 for preliminary cooling;

[0028] The precooling body 1 and the flow divider 2 are both provided with a first melt flow channel 3, and the first melt flow channel 3 has a narrow inlet and a wide outlet; the inlet of the first melt flow channel 3 is connected to the connecting groove 11, so that the PEEK melt can flow into the first melt flow channel 3; specifically, the precooling body 1 is provided with a first groove 12, and the flow divider 2 is provided with a second groove 22, and the first groove 12 and the second groove 22 are spliced ​​to form the outlet part structure of the first melt flow channel 3, so it can be regarded as that the first melt flow channel 3 is simultaneously provided in the precooling body 1 and the flow divider 2;

[0029] The flow divider 2 is provided with a plurality of second melt flow channels 21, and the second melt flow channels 21 are configured to have a narrow inlet and a wide outlet; the inlets of the plurality of second melt flow channels 21 are connected to the outlet of the first melt flow channel 3, forming a tapered flow channel structure, the outlet of the second melt flow channel 21 extends to the outside of the flow divider 2, and the outlet of the second melt flow channel 21 is designed to be a trumpet-shaped structure, so that the PEEK melt can fully release stress when flowing through the outlet of the second melt flow channel 21;

[0030] like Figure 1 and Figure 3 As shown, a flow cone structure 31 is preferably provided near the middle of the bottom of the second groove 22. Such a structural design can be used to disperse the PEEK melt at the outlet of the first melt flow channel 3 to both sides of the outlet, so that it flows evenly into the second melt flow channel 21, thereby improving the uniformity and stability of material flow.

[0031] The extrusion die also includes a temperature sensing element 4 and a heating element for real-time monitoring and regulating the temperature inside the extrusion die.

[0032] In Example 1, the manufacturing material of the PEEK material extrusion die can be selected from highly wear-resistant and corrosion-resistant die materials, which improves the service life and stability of the die and reduces the maintenance cost during the production process.

[0033] The PEEK material extrusion die designed by the utility model adopts a tapered flow channel structure design, which effectively improves the fluidity and mixing effect of the PEEK material in the die, and improves the uniformity and consistency of the PEEK profile. At the same time, the die also adopts a split structure design, which is easy to disassemble and maintain, reducing production costs and maintenance difficulties.

[0034] The above preferred embodiments of the utility model are only used to explain the utility model, and are not used to limit the utility model. Any obvious changes or modifications derived from the technical solution of the utility model are still within the protection scope of the utility model.

Claims

1. A PEEK material extrusion die, characterized in that: The extrusion die comprises: a pre-cooling body (1) for cooling a melt formed by melting the PEEK material and a flow divider (2) detachably arranged on the pre-cooling body (1); The pre-cooling body (1) is provided with a connecting groove (11) for connecting to an extrusion port on an extruder; the pre-cooling body (1) and / or the flow divider (2) are provided with a first melt flow channel (3), and the first melt flow channel (3) has a narrow inlet and a wide outlet; the inlet of the first melt flow channel (3) is connected to the connecting groove (11); A plurality of second melt flow channels (21) are arranged in the flow divider (2), and the second melt flow channels (21) are arranged to have a narrow inlet and a wide outlet; the inlets of the plurality of second melt flow channels (21) are all connected to the outlet of the first melt flow channel (3), and the outlets thereof extend to the outside of the flow divider (2).

2. A PEEK material extrusion die according to claim 1, characterized in that: The first melt flow channel (3) is arranged in both the pre-cooling body (1) and the flow distributor (2); The pre-cooling body (1) is provided with a first groove (12), and the flow divider (2) is provided with a second groove (22); the first groove (12) and the second groove (22) are spliced ​​to form the outlet structure of the first melt flow channel (3).

3. A PEEK material extrusion die according to claim 1 or 2, characterized in that: The first melt flow channel (3) is also provided with a diverter cone structure (31) for evenly dispersing the PEEK melt in the first melt flow channel (3).

4. A PEEK material extrusion die according to claim 3, characterized in that: The diverter cone structure (31) is arranged near the middle of the outlet of the first melt flow channel (3) and is used to disperse the PEEK melt to both sides of the outlet of the first melt flow channel (3).

5. A PEEK material extrusion die according to claim 1, characterized in that: The outlet of the second melt flow channel (21) is configured as a bell-mouth structure.

6. A PEEK material extrusion die according to claim 1, characterized in that: The extrusion die also includes a temperature sensing element (4) and a heating element for real-time monitoring and regulating the temperature inside the extrusion die.

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