Split type ultra-thin wire insulation extrusion inner die structure

Abstract

The utility model relates to the technical field of wire insulation extrusion dies, in particular to a split type superfine wire insulation extrusion inner die structure. The extrusion inner die comprises an extrusion inner die body and an extrusion inner die needle matched with the extrusion inner die body for connection, an inner connecting part matched with the extrusion inner die needle is arranged at the front end of the inner diameter of the extrusion inner die body, and a connecting block is arranged at the rear end of the extrusion inner die needle in an outward extending mode. The inner connecting part is provided with a threading hole, the inner connecting part is provided with a connecting block, the connecting block is internally provided with a hole groove communicated with the threading hole, the outer surface of the connecting block is provided with an outer connecting part, the outer connecting part of the connecting block is arranged in the extrusion inner die main body, and the outer connecting part is in contact with the inner connecting part. The utility model has the beneficial effects that a split mechanism adopted by the technical scheme is divided into the extrusion inner die main body and the extrusion inner die needle, the extrusion inner die main body and the extrusion inner die needle can be quickly connected, the die needle is detached and replaced by a new one, the die body does not need to be replaced, the total length of the split die needle is shorter, the concentricity is good during turning, and the drilling difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wire insulation extrusion die technology, and in particular to a split-type ultra-fine wire insulation extrusion inner die structure. Background Technology

[0002] Traditional cable insulation extrusion uses an inner and outer die forming method. The inner die is mainly responsible for fixing the conductor wire and the flow direction of the extruded material, while the outer die is mainly responsible for controlling the extruded shape and dimensions and the flow direction of the extruded material.

[0003] refer to Figure 1 The diagram shows a cross-sectional view of the inner and outer extrusion dies in the prior art. In the process of extruding ultra-fine cables, the dimensions of the inner and outer extrusion dies also need to be extremely small.

[0004] For example, referring to the UL standard for 4AWG wire, the nominal diameter of the conductor wire is 0.05mm, the nominal outer diameter of the extruded insulation layer is 0.11mm, and the corresponding required inner diameter of the extrusion die is 0.25mm, the outer diameter of the main body tube of the extrusion die is 0.5mm, the length of the main body tube of the extrusion die is 5mm, and the length of the connection part at the root of the tube is 3mm. At this time, the wall thickness of the tubular part of the inner die is 0.125mm.

[0005] The aforementioned inner mold is extremely difficult to manufacture, resulting in a production cost of tens of thousands of yuan. Furthermore, the inner mold opening has very thin walls, requiring a drilling length of 8mm and a length-to-diameter ratio as high as 32, making it very fragile; even a light touch can cause slight deformation. This results in high production costs and a high rate of damage to the mold.

[0006] Therefore, it is necessary to design a split-type ultra-fine wire insulation extrusion inner mold structure to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a split-type ultra-fine wire insulation extrusion inner mold structure to overcome the above-mentioned shortcomings of the existing technology.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A split-type ultra-fine wire insulation extrusion inner mold structure includes an extrusion inner mold body and an extrusion inner mold needle connected to the extrusion inner mold body. An inner connecting part that mates with the extrusion inner mold needle is provided at the front end of the inner diameter of the extrusion inner mold body. A connecting block extends outward from the rear end of the extrusion inner mold needle, and a slot communicating with a wire hole is provided in the connecting block. An outer connecting part is provided on the outer surface of the connecting block. The outer connecting part of the connecting block is placed inside the extrusion inner mold body, and the outer connecting part and the inner connecting part are in contact with each other.

[0010] Preferably, the inner die of the extrusion die has a threading hole inside.

[0011] Preferably, the outer connecting part of the extrusion inner die needle and the inner connecting part of the extrusion inner die body are connected by inlay, threaded connection or brazing.

[0012] Preferably, the outer connecting part is threaded, the inner connecting part is threaded, and the inner connecting part and the outer connecting part are connected by thread.

[0013] Preferably, the outer connecting part is a protruding structure and the inner connecting part is a groove structure, by embedding the outer connecting part into the groove structure.

[0014] Preferably, the outer connecting part is a groove structure, and the inner connecting part is a protrusion mechanism, wherein the protrusion mechanism of the inner connecting part is embedded in the groove structure of the outer connecting part.

[0015] Preferably, the outer connecting part and the inner connecting part are connected by welding.

[0016] The beneficial effects of this utility model are as follows: This technical solution adopts a split mechanism consisting of an extrusion inner mold body and an extrusion inner mold needle, and the two can be quickly connected by means of inlay connection, threaded connection or brazing connection. When the needle is damaged, the needle can be removed and replaced with a new one, and the mold body does not need to be replaced. At the same time, compared with the prior art, the original mold is longer and the needle end cannot be clamped, which makes it easy for the needle end to be eccentric during machining and difficult to process. The split improvement solves this problem. After splitting, the total length of the needle is shorter, the concentricity is better during machining, and the drilling difficulty is reduced. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-section of an extrusion die in the prior art;

[0018] Figure 2 This is a schematic diagram of the main body of the extrusion inner mold of the split-type ultra-fine wire insulation extrusion inner mold structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the extrusion die needle of a split-type ultra-fine wire insulation extrusion inner die structure according to this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of a split-type ultra-fine wire insulation extrusion inner mold of the present invention;

[0021] In the figure: 1. Extrusion inner mold body; 11. Inner connecting part; 2. Extrusion inner mold die pin; 3. Wire hole; 4. Connecting block; 41. Outer connecting part; 5. Resin material; 6. Extrusion outer mold; 7. Conductor wire. Detailed Implementation

[0022] Reference Figures 2 to 4 A split-type ultra-fine wire insulation extrusion inner mold structure includes an extrusion inner mold body 1 and an extrusion inner mold needle 2 connected to the extrusion inner mold body. The extrusion inner mold needle and the extrusion inner mold body are connected by means of inlay connection, threaded connection or brazing connection.

[0023] refer to Figure 1 In the prior art, the inner die body and the inner die needle are an integral structure, and the front end is placed inside the outer die, forming a gap between the outer die for the resin material 5 to flow. The inner die body 1 has a slot for the conductor wire 7 to pass through, so as to cooperate in the resin insulation processing and molding.

[0024] This utility model divides the one-piece extrusion inner mold into an extrusion inner mold body and an extrusion inner mold needle. Because the original mold was too long and the needle end was too thin to be clamped, the needle end was prone to eccentricity during machining, and the drill bit broke during drilling, making it difficult to process. The improved split design solves this problem. After splitting, the total length of the needle is shorter, the concentricity is better during machining, the drilling difficulty is reduced, and the needle is smaller in size than the original mold, so harder materials can be used to process it, thus improving the mold's lifespan.

[0025] In order to connect the extrusion inner die needle and the extrusion inner die body, an inner connecting part 11 that matches the extrusion inner die needle is provided at the front end of the inner hole of the extrusion inner die body;

[0026] The inner die of the extrusion die is provided with a thread hole 3 inside. A connecting block 4 is provided extending outward from the rear end of the inner die of the extrusion die, and a slot is provided in the connecting block to communicate with the thread hole. An outer connecting part 41 is provided on the outer surface of the connecting block.

[0027] The outer connecting part of the connecting block is placed inside the extrusion inner mold body, and the outer connecting part and the inner connecting part are in contact with each other;

[0028] In the first embodiment, the outer connecting part is threaded, and the inner connecting part is also threaded. The inner connecting part and the outer connecting part are connected by threaded connection to achieve mutual connection.

[0029] In the second embodiment, the outer connecting part is a protruding structure, and the inner connecting part is a grooved structure. The interlocking connection is achieved by embedding the outer connecting part into the grooved structure and pressing it in with a device. Similarly, the outer connecting part is a grooved structure, and the inner connecting part is a protruding mechanism. The interlocking connection is achieved by embedding the protruding mechanism of the inner connecting part into the grooved structure of the outer connecting part.

[0030] In the third embodiment, the outer connecting part and the inner connecting part are fixed by welding to achieve the connection.

[0031] The advantages of this utility model are that the technical solution adopts a split mechanism consisting of an extrusion inner mold body and an extrusion inner mold needle, which can be quickly connected by means of inlay connection, threaded connection or brazing connection. When the mold needle is damaged, it can be removed and replaced with a new one, without replacing the mold body. At the same time, compared with the prior art, the original mold is longer and the mold needle end cannot be clamped, which makes it easy for the mold needle end to be eccentric during machining and difficult to process. The split improvement solves this problem. After splitting, the total length of the mold needle is shorter, the concentricity is better during machining, and the drilling difficulty is reduced.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A split-type ultra-fine wire insulation extrusion inner mold structure, characterized in that: It includes an extrusion inner mold body and an extrusion inner mold needle connected to the extrusion inner mold body. An inner connecting part that matches the extrusion inner mold needle is provided at the front end of the inner diameter of the extrusion inner mold body. A connecting block is provided extending outward from the rear end of the extrusion inner mold needle. A slot is provided in the connecting block that communicates with the threading hole. An outer connecting part is provided on the outer surface of the connecting block. The outer connecting part of the connecting block is placed inside the extrusion inner mold body, and the outer connecting part and the inner connecting part are in contact with each other.

2. The split-type ultra-fine wire insulation extrusion inner mold structure according to claim 1, characterized in that: The inner die of the extrusion die has a threading hole inside.

3. The split-type ultra-fine wire insulation extrusion inner mold structure according to claim 1, characterized in that: The outer connecting part of the extrusion inner die needle and the inner connecting part of the extrusion inner die body are connected by inlay, threaded connection or brazing.

4. The split-type ultra-fine wire insulation extrusion inner mold structure according to claim 1, characterized in that: The outer connecting part is threaded, the inner connecting part is threaded, and the inner connecting part and the outer connecting part are connected by thread.

5. The split-type ultra-fine wire insulation extrusion inner mold structure according to claim 1, characterized in that: The outer connecting part is a protruding structure, and the inner connecting part is a groove structure, by embedding the outer connecting part into the groove structure.

6. The split-type ultra-fine wire insulation extrusion inner mold structure according to claim 1, characterized in that: The outer connecting part is a groove structure, and the inner connecting part is a protrusion mechanism, wherein the protrusion mechanism of the inner connecting part is embedded in the groove structure of the outer connecting part.

7. The split-type ultra-fine wire insulation extrusion inner mold structure according to claim 1, characterized in that: The outer connecting part and the inner connecting part are connected by welding.

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