Cable extrusion die capable of improving adhesive force of cable

Abstract

A cable extrusion die capable of improving cable adhesive force comprises an inner die and an outer die, the inner die is nested and coaxially arranged in the outer die, a gap is formed between the inner die and the outer die, and the die opening end face of the inner die is located in the die opening end face of the outer die; and the section of a die orifice of the outer die is in a trumpet-shaped arc shape. The cable extrusion die is made of tungsten steel or Cr12. The utility model provides a novel arc-shaped mold structure, so that the stability of a cable structure is improved, the adhesive force of a cable can be effectively reduced, and the processing convenience of the cable is improved. The problem of insufficient adhesive force existing in a traditional cable insulating layer processing method is solved. Meanwhile, the device is simple in structure, convenient to operate and low in cost, and has good application prospects and market potential.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable production equipment, and specifically refers to a cable extrusion die for improving the adhesion of cables. Background Art

[0002] The extrusion die is a forming device for extrusion products and is the final hot pressing device in the entire extrusion process. Its geometric shape, structural type and size, temperature, and pressure directly determine the processing quality of the products. Therefore, the design and selection of any extrusion die for plastic products have received high attention. Generally speaking, the extrusion die is an essential forming device in the plastic processing process and has a relatively long development history. Currently, it has been widely used in fields such as automobiles, electronic equipment, and industrial automation. With the continuous increase in market demand, in recent years, there has been an increasing demand for high-quality and high-stability cable products, which has further promoted the development of cable insulation processing. More and more research is exploring how to improve the processing capacity of cables to ensure the reprocessing performance, mechanical strength, and reliability of cables.

[0003] In the prior art, there are three types of extrusion dies (including the inner die and the outer die): the extrusion type, the tube extrusion type, and the semi-tube extrusion type. As Figure 1 shown is the structural schematic diagram of the extrusion die, as Figure 2 shown is the structural schematic diagram of the semi-tube extrusion die, as Figure 3 shown is the structural schematic diagram of the tube extrusion die. The structures of the three dies are basically the same, and the difference lies in whether there is a tubular sizing part at the front end of the inner die or the relative position of the tubular sizing part and the outer die, but they are all designed with a linear pressure zone.

[0004] Although traditional extrusion dies are widely used in the industry, there is a problem of unstable insulation adhesion during use. This is because the pressure brought by the die during the extrusion process is insufficient, resulting in an unstable structure after the final insulation forming. Traditional extrusion dies have the following problems and defects: 1. The quality of the plastic layer is unstable. Traditional dies usually have a relatively smooth extrusion pressure zone and cannot generate a large pressure, resulting in an unstable plastic extrusion plastic layer; 2. The surface of the extruded plastic is not smooth enough. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a cable extrusion die for improving the adhesion of cables.

[0006] The utility model is realized as follows:

[0007] A wire and cable extrusion die for improving the adhesion of wires and cables, comprising: an inner die and an outer die. The inner die is nested and coaxially arranged inside the outer die. There is a gap between the inner die and the outer die, and the die orifice end face of the inner die is located inside the die orifice end face of the outer die; the die orifice cross-section of the outer die is in the shape of a horn-shaped arc.

[0008] Furthermore, the material of the wire and cable extrusion die is tungsten steel or Cr12.

[0009] The advantages of the present utility model are as follows: A novel arc-shaped die structure is proposed to improve the stability of the cable structure, which can effectively reduce the adhesion problem of wires and cables and improve the processing convenience of wires and cables. It solves the problem of insufficient adhesion existing in the traditional processing method of wire and cable insulating layers. At the same time, the device has a simple structure, convenient operation, and low cost, and has good application prospects and market potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following further describes the present utility model with reference to the accompanying drawings in conjunction with embodiments.

[0011] Figure 1 is a schematic structural diagram of an extrusion die of the prior art.

[0012] Figure 2 is a schematic structural diagram of a semi-extrusion tube die of the prior art.

[0013] Figure 3 is a schematic structural diagram of an extrusion tube die of the prior art.

[0014] Figure 4 is a schematic structural diagram of the extrusion die of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Please refer to Figure 4 as shown. A wire and cable extrusion die for improving the adhesion of wires and cables, comprising: an inner die 1 and an outer die 2. The inner die 1 is nested and coaxially arranged inside the outer die 2. There is a gap between the inner die 1 and the outer die 2, and the die orifice end face of the inner die 1 is located inside the die orifice end face of the outer die 2; the die orifice cross-section of the outer die 2 is in the shape of a horn-shaped arc.

[0016] The material of the die is tungsten steel or Cr12, and the hardness is HRC48 - 52.

[0017] The die orifice of the outer die 2 is an internal arc angle structure, and the shape and size can be adjusted according to needs.

[0018] When the cable conductor passes through the mold body, the insulating material softens under the action of the cable extrusion equipment's built-in heating device, and is tightly combined with the conductor layer under the action of the arc-shaped angle structure inside the mold body, forming an insulating layer with stronger adhesion. Subsequently, the cable extrusion equipment's built-in cooling device cools the cable, allowing the insulating layer to solidify quickly and enhance adhesion. The specific operation steps are as follows:

[0019] Preparation: Add the insulating material to the feed port of the mold body and pass the cable conductor through the center hole of the mold body;

[0020] Heating and softening: Start the extrusion equipment to heat the mold body so that the insulating material is heated and softened inside the mold body;

[0021] Mold function: When the insulating material softens, under the action of the flow direction inside the mold body, the insulating material and the conductor layer are tightly combined to form an insulating layer with stronger adhesion;

[0022] Cooling and curing: Start the cooling device of the extrusion equipment to cool the cables with the formed insulation layer so that they can be cured quickly;

[0023] Remove the cable: When the insulation layer is completely cured, remove the cable from the outlet of the mold body.

[0024] The utility model improves the adhesion between the insulating layer and the conductor layer through a special mold design, thereby ensuring the quality and performance of the cable.

[0025] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A cable extrusion die for improving cable adhesion, characterized in that: include: An inner mold and an outer mold, wherein the inner mold is nested and coaxially arranged in the outer mold, a gap is provided between the inner mold and the outer mold, and the die opening end face of the inner mold is located inside the die opening end face of the outer mold; the die opening cross section of the outer mold is a trumpet-shaped arc.

2. A cable extrusion die for improving cable adhesion as claimed in claim 1, characterized in that: The cable extrusion die is made of tungsten steel or Cr12.

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