A mold for extrusion

Abstract

The utility model provides a kind of mould for extrusion, from front to rear is front module, rear module and base in proper order, and front module, rear module and base are all cylindrical structure, and the front end of rear module is inserted to the rear side of front module, and at least two groups of spacing components with same structure are equipped between front module and rear module to install front module and rear module apart, and the gap between front module and rear module forms first spacing channel for installing glue injection mechanism to glue injection into mould, and the rear side of rear module is equipped with the first installation groove of concave, and inner mould insert is placed in first installation groove, and the front end of base is inserted into first installation groove and is inserted with inner mould insert, and base is fixedly installed with rear module by screw.The mould for extrusion of the application is quickly assembled using assembly structure, in addition, inner mould insert and base in the application are made of polyimide (PI) material, which can effectively prevent copper or aluminum expansion from being scratched when entering the mould.

Description

Technical Field

[0001] This utility model relates to the field of mold technology for overmolding, specifically a mold for extrusion. Background Technology

[0002] Both copper and aluminum busbars are conductive materials used in power transmission. Copper busbars are made of copper, while aluminum busbars are made of aluminum or aluminum alloys. Their cross-sections are typically rectangular or chamfered rectangular, used to transmit current and connect electrical equipment. Because both copper and aluminum busbars have excellent conductivity, they must be coated with an insulating layer to prevent contact with people or other equipment and potential safety accidents. This coating is usually achieved through injection molding into an extrusion mold. However, current extrusion molds are not easy to assemble, and most are made of steel. The injection molding process generates temperatures of around 250 degrees Celsius, causing the copper or aluminum busbars to expand. This high temperature can easily scratch the outer surface of the product during transport within the mold, leading to unevenness on the product's end face during subsequent injection molding. This can result in problems such as difficulty in timely demolding after coating, affecting overall processing efficiency and quality. Utility Model Content

[0003] The purpose of this utility model is to provide an extrusion mold to solve the technical problems in the background art.

[0004] To achieve the aforementioned objectives, this utility model provides the following technical solution:

[0005] An extrusion mold comprises, from front to back, a front module, a rear module, and a base. All three modules are cylindrical. The front end of the rear module is inserted into the rear side of the front module, and at least two sets of identical spacer components are provided between the front and rear modules to space them apart. The gap between the front and rear modules forms a first spacer channel for installing an injection mechanism to inject adhesive into the mold. The rear side of the rear module has a recessed first mounting groove, which is circular and its axis coincides with the axis of the rear module. An inner mold insert, which is cylindrical and coaxial with the first mounting groove, is placed within the first mounting groove. The front end of the base is inserted into the first mounting groove and engages with the inner mold insert. The base and the rear module are fixed together by screws. The product is conveyed from the rear side of the base towards the front module. Both the base and the inner mold insert are made of polyimide material.

[0006] The base is provided with a first feeding hole that runs through its front and back, the inner mold insert is provided with a second feeding hole that matches the shape of the product, the rear module is provided with a third feeding hole, and the front module is provided with a fourth feeding hole. The first feeding hole, the second feeding hole, the third feeding hole, and the fourth feeding hole are connected in sequence.

[0007] The base includes a base plate and a first boss. Both the first boss and the base plate are cylindrical structures and are coaxially arranged. The first boss is inserted into a first mounting groove and is located on the rear side of the inner mold insert. The inner mold insert is coaxially arranged with the first boss. The inner mold insert has at least two first guide holes along its circumferential direction. The first boss has a corresponding second guide hole. The inner mold insert and the base plate are oriented and installed together by a first pin. The two ends of the first pin are inserted into the first guide hole and the second guide hole, respectively.

[0008] The rear module includes a rear template and a second protrusion. The rear side of the front module is provided with a recessed receiving groove, which is connected to a third feeding hole. The second protrusion is inserted into the receiving groove. The second protrusion is a frustum structure. The transverse cross section of the receiving groove is an isosceles trapezoidal structure, and its inclination angle is consistent with the slope of the second protrusion. The second protrusion is symmetrically provided with two first inclined surfaces along the axis. The receiving groove is provided with corresponding second inclined surfaces, which are positioned opposite to the first inclined surfaces. The second protrusion and the receiving groove are spaced apart and form a second interval channel that is connected to the first interval channel.

[0009] The spacer assembly includes a second pin and a ring. The ring is fitted onto the second pin. The rear side of the front module has a first positioning hole, and the front end of the rear module has a second positioning hole that matches the position of the first positioning hole. The front and rear ends of the second pin are respectively inserted into the first positioning hole and the second positioning hole. The ring is located between the front module and the rear module.

[0010] Compared with the prior art, the extrusion mold of this application adopts a modular structure for rapid assembly. After the rear module is fixed to the base, during installation, the spacer component only needs to be inserted into the corresponding positioning holes of the front and rear modules to quickly assemble the extrusion mold. In addition, the inner mold insert and the base of this application are made of polyimide (PI) material, which can effectively prevent the copper or aluminum busbar from being scratched when it expands and enters the mold. The scratch-free surface of the copper or aluminum busbar can make the thickness of the injection layer uniform and the flow resistance of the glue consistent, avoiding bubbles, glue cracks or sealing failures caused by surface defects. Attached Figure Description

[0011] Figure 1 : A three-dimensional structural diagram of this application;

[0012] Figure 2 : An exploded view of this application;

[0013] Figure 3 : The front view of this application;

[0014] Figure 4 : Figure 3 AA section view;

[0015] Figure 5 : Figure 3 BB section view;

[0016] Figure 6 : Rear module 3D structure diagram;

[0017] Figure 7 : Rear module sectional view;

[0018] Figure 8 : 3D structural diagram of the base;

[0019] Figure 9 : A schematic diagram illustrating the effect of using this application. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Specific Implementation Example 1: Please refer to Figures 1 to 9 In this embodiment of the present invention, an extrusion mold comprises, from front to back, a front module 1, a rear module 3, and a base 6. The front module 1, the rear module 3, and the base 6 are all cylindrical structures. The front end of the rear module 3 is inserted into the rear side of the front module 1, and at least two sets of spacer components 2 with identical structures are provided between the front module 1 and the rear module 3 to space the front module 1 and the rear module 3. The gap between the front module 1 and the rear module 3 forms a first spacer channel C for installing an injection mechanism to inject glue into the mold. In this embodiment, four sets of spacer components 2 are installed between the front module 1 and the rear module 3.

[0022] A recessed first mounting groove 301-2 is provided on the rear side of the rear module 3. The first mounting groove 301-2 is a circular groove structure and its axis coincides with the axis of the rear module 3. An inner mold insert 4 is placed in the first mounting groove 301-2. The inner mold insert 4 is a cylindrical structure and is coaxially arranged with the first mounting groove 301-2. The front end of the base 6 is inserted into the first mounting groove 301-2 and is connected to the inner mold insert 4. The base 6 and the rear module 3 are fixedly installed by screws. The product is conveyed from the rear side of the base 6 to the front module 1. The base 6 and the inner mold insert 4 are both made of polyimide (PI) material. PI material can maintain mechanical strength and dimensional stability in the range of -269℃ to 400℃. The mold will not soften or deform due to high temperature, avoiding abnormal compression with the product.

[0023] The base 6 is provided with a first feeding hole 603 that runs through its front and back, the inner mold insert 4 is provided with a second feeding hole 402 that matches the shape of the product, the rear module 3 is provided with a third feeding hole 302-2, and the front module 1 is provided with a fourth feeding hole 101. The first feeding hole 603, the second feeding hole 402, the third feeding hole 302-2 and the fourth feeding hole 101 are connected in sequence.

[0024] The base 6 includes a base plate 601 and a first boss 602. Both the first boss 602 and the base plate 601 are cylindrical structures and are coaxially arranged. The first boss 602 is inserted into the first mounting groove 301-2 and is located on the rear side of the inner mold insert 4. The inner mold insert 4 is coaxially arranged with the first boss 602. The inner mold insert 4 is provided with at least two first guide holes 401 along the circumferential direction of its axis. The first boss 602 is provided with a corresponding second guide hole 602-1. The inner mold insert 4 and the base plate 601 are oriented and installed together by a first pin 5. The two ends of the first pin 5 are inserted into the first guide hole 401 and the second guide hole 602-1, respectively.

[0025] The rear module 3 includes a rear template 301 and a second protrusion 302. The rear side of the front module 1 is provided with a recessed receiving groove 102, which is connected to the fourth feeding hole 101. The second protrusion 302 is inserted into the receiving groove 102. The second protrusion 302 is a frustum structure. The transverse cross section of the receiving groove 102 is an isosceles trapezoid structure, and its inclination angle is consistent with the slope of the second protrusion 302. The second protrusion 302 is symmetrically provided with two first inclined surfaces 302-1 along the axis. The receiving groove 102 is provided with corresponding second inclined surfaces 102-1 and the positions of the first inclined surfaces 302-1 are opposite. The second protrusion 302 and the receiving groove 102 are spaced apart and form a second interval channel D that is connected to the first interval channel C.

[0026] The spacer assembly 2 includes a second pin 201 and a ring 202. The ring 202 is fitted onto the second pin 201. The rear side of the front module 1 is provided with a first positioning hole, and the front end of the rear module 3 is provided with a second positioning hole that matches the position of the first positioning hole. The front and rear ends of the second pin 201 are respectively inserted into the first positioning hole and the second positioning hole. The ring 202 is located between the front module 1 and the rear module 3.

[0027] The mold usage process of this application is as follows: the mold is installed on the extruder head, the glue injection mechanism is installed in the first interval channel C, the molten material is introduced into the first interval channel C and the receiving tank 102, when the product 7 is output from the first feeding hole 603 to the second feeding hole 402, the glue coating operation on the outer surface of the copper busbar or aluminum busbar is completed in the receiving tank 102, and then conveyed through the fourth feeding hole 101 to complete the plasticizing and molding operation on the outer surface of the product 7 in this application.

[0028] Compared with the prior art, the extrusion mold of this application adopts a modular structure for rapid assembly. After the rear module is fixed to the base, during installation, the spacer component only needs to be inserted into the corresponding positioning holes of the front and rear modules to quickly assemble the extrusion mold. In addition, the inner mold insert and the base of this application are made of polyimide (PI) material, which can effectively prevent the copper or aluminum busbar from being scratched when it expands and enters the mold. The scratch-free surface of the copper or aluminum busbar can make the thickness of the injection layer uniform and the flow resistance of the glue consistent, avoiding bubbles, glue cracks or sealing failures caused by surface defects.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the foregoing exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A die for extrusion, characterized in that: From front to back, the components are a front module, a rear module, and a base. All three modules are cylindrical. The front end of the rear module is inserted into the rear side of the front module, and at least two sets of identical spacer components are provided between the front and rear modules to space them apart. The gap between the front and rear modules forms a first spacer channel for installing an injection mechanism to inject adhesive into the mold. The rear side of the rear module has a recessed first mounting groove. The first mounting groove is a circular groove with its axis coinciding with the axis of the rear module. An inner mold insert is placed in the first mounting groove. The inner mold insert is cylindrical and coaxial with the first mounting groove. The front end of the base is inserted into the first mounting groove and connected to the inner mold insert. The base and the rear module are fixedly installed with screws. The product is conveyed from the rear side of the base towards the front module. Both the base and the inner mold insert are made of polyimide material.

2. The extrusion mold according to claim 1, characterized in that: The base is provided with a first feeding hole that runs through its front and back, the inner mold insert is provided with a second feeding hole that matches the shape of the product, and the front module is provided with a fourth feeding hole. The first feeding hole, the second feeding hole, the third feeding hole and the fourth feeding hole are connected in sequence.

3. The extrusion mold according to claim 2, characterized in that: The base includes a base plate and a first boss. Both the first boss and the base plate are cylindrical structures and are coaxially arranged. The first boss is inserted into a first mounting groove and is located on the rear side of the inner mold insert. The inner mold insert is coaxially arranged with the first boss. The inner mold insert has at least two first guide holes along its circumferential direction. The first boss has a corresponding second guide hole. The inner mold insert and the base plate are oriented and installed together by a first pin. The two ends of the first pin are inserted into the first guide hole and the second guide hole, respectively.

4. The extrusion mold according to claim 3, characterized in that: The rear module includes a rear template and a second protrusion. The rear side of the front module is provided with a recessed receiving groove, which is connected to a third feeding hole. The second protrusion is inserted into the receiving groove. The second protrusion is a frustum structure. The transverse cross section of the receiving groove is an isosceles trapezoidal structure, and its inclination angle is consistent with the slope of the second protrusion. The second protrusion is symmetrically provided with two first inclined surfaces along the axis. The receiving groove is provided with corresponding second inclined surfaces, which are positioned opposite to the first inclined surfaces. The second protrusion and the receiving groove are spaced apart and form a second interval channel that is connected to the first interval channel.

5. The extrusion mold according to claim 4, characterized in that: The spacer assembly includes a second pin and a ring. The ring is fitted onto the second pin. The rear side of the front module has a first positioning hole, and the front end of the rear module has a second positioning hole that matches the position of the first positioning hole. The front and rear ends of the second pin are respectively inserted into the first positioning hole and the second positioning hole. The ring is located between the front module and the rear module.

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