Two-core parallel cable insulation extrusion die

Abstract

The utility model relates to the technical field of cable manufacturing equipment, in particular to an insulation extrusion die for a two-core parallel cable, which is designed to be used for efficiently and accurately manufacturing the two-core parallel cable. Comprising a mold core, a mold sleeve and a positioning adjusting hole, the mold core is conical, and two metal wire passing pipes are arranged in the center of the mold core in parallel; the outer portion of the die sleeve is in a stepped cylinder shape, the hollow portion inside the die sleeve is in a conical shape, the conical angle of the die sleeve is larger than that of the die core, so that an extrusion outflow channel of insulating plastic is formed after the die sleeve and the die core are combined together, and a die opening of the die sleeve is composed of two parallel circular rings. The positioning adjusting hole is formed outside the die sleeve; the two-core cable insulation extrusion die is a dumbbell-shaped parallel die and is provided with two circle centers, and the distances between the two circle centers and the installation center point of a basic machine head die are equal; the die can simultaneously extrude two wires for insulation, the two wires are integrally connected in parallel after being extruded, a subsequent twisting process is not needed, and the production efficiency of the die is improved by more than three times compared with that of a traditional die.

Description

Technical Field

[0001] This utility model relates to the field of cable manufacturing equipment technology, specifically a mold designed for the efficient and precise manufacture of two-core parallel cables. Background Technology

[0002] In power transmission and communication systems, two-core parallel cables are widely used due to their advantages such as compact structure, convenient wiring, and high production efficiency.

[0003] However, traditional cable molds are concentric circles, which make it easy to adjust the thickness and eccentricity of the extruded layer. But traditional extrusion molds can only extrude the insulation of one cable at a time. Two-core cables have to have their insulation layers extruded separately and then twisted together, resulting in low production efficiency.

[0004] Therefore, this application proposes a two-core parallel cable insulation extrusion die. Utility Model Content

[0005] This invention proposes a two-core parallel cable insulation extrusion die. The two-core cable insulation extrusion die of this invention is a dumbbell-shaped parallel die with two centers, and the two centers are equidistant from the installation center point of the base die head. This die can extrude insulation for two wires at the same time, and the two wires are connected together in parallel after extrusion, without the need for subsequent stranding process. Its production efficiency is more than 3 times higher than that of traditional dies.

[0006] The technical implementation scheme of this utility model is as follows:

[0007] A two-core parallel cable insulation extrusion die includes a die core, a die sleeve, and a positioning adjustment hole.

[0008] The mold core is conical, with two metal conduits arranged parallel to each other at its center.

[0009] The outer part of the mold sleeve is a stepped cylinder, and the inner hollow part is a cone. The cone angle of the mold sleeve is greater than that of the mold core, so that when the mold sleeve and the mold core are combined, they form an extrusion channel for insulating plastic. The mold opening of the mold sleeve consists of two parallel rings.

[0010] The positioning and adjustment holes are located on the outside of the mold sleeve.

[0011] Furthermore, the inner diameter of the two metal conduits is slightly larger than the outer diameter of the extruded wire conductor, allowing the conductor to pass smoothly through the metal conduits during operation.

[0012] Furthermore, the rings of the mold sleeve are brought together tightly, and the tightly pressed part is broken, so that the two rings intersect to form a dumbbell-shaped mold opening.

[0013] Furthermore, the arrangement of metal conduits is not limited to parallel arrangement; it can be triangular or square arrangement. The number of metal conduits can be 3, 4, or 1 in the center plus 4 on the sides.

[0014] Furthermore, the die shape is the same as the design shape of the extruded cable, and is not limited to dumbbell shape.

[0015] This utility model has the following advantages:

[0016] The mold provided by this utility model achieves precise positioning of the wire core and uniform distribution of the insulation layer through the precise matching of the mold core and mold sleeve. Traditional molds can only produce one wire at a time. For cables composed of two or more wires, further twisting is required. This application extrudes the insulation of two or more wires in one go, improving production efficiency by more than 3 times without the use of traditional molds.

[0017] The positioning adjustment hole allows the die sleeve to be finely adjusted relative to the die core, thereby ensuring precise alignment between the insulation layer forming groove and the wire core channel, further improving the manufacturing precision of the cable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a traditional two-core finished cable.

[0019] Figure 2 This is a schematic diagram of a new type of two-core finished cable;

[0020] Figure 3 A schematic diagram of a two-core parallel cable mold core;

[0021] Figure 4 Schematic diagram of a two-core parallel cable sleeve;

[0022] Figure 5 This is a schematic diagram of the fit between the inner and outer mold sleeves;

[0023] Figure 6 This is a schematic diagram showing the fit between a two-core parallel cable and a mold sleeve.

[0024] Figure 7 This is a schematic diagram of the production process of a two-core parallel cable.

[0025] Among them, 1-mold core; 11-metal conduit; 2-mold sleeve; 21-mold opening; 3-positioning adjustment hole. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0027] Example 1

[0028] This utility model provides a novel two-core parallel cable insulation extrusion die, which consists of a die core 1 and a die sleeve 2. Its structure is shown in the figure below. Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown in the figure, it mainly includes:

[0029] The core 1 is conical, with two metal wire guide tubes 11 arranged in parallel at its center. The inner diameter of the two metal wire guide tubes 11 is slightly larger than the outer diameter of the extruded wire conductor, so that the conductor can pass smoothly through the metal wire guide tubes 11 during operation.

[0030] The outer part of the mold sleeve 2 is a stepped cylinder, and the inner hollow part is a cone. The cone angle of the mold sleeve 2 is greater than that of the mold core 1, so that when the mold sleeve 2 and the mold core 1 are combined, they form an extrusion channel for the insulating plastic. The die opening 21 of the mold sleeve 2 consists of two parallel rings that are close together, with the close part broken, so that the two rings intersect to form... Figure 4 The dumbbell-shaped die shown.

[0031] The positioning adjustment hole 3 is located outside the mold sleeve 2 and is used to fine-tune the position of the mold sleeve 2 to ensure the precise alignment of the insulation layer forming groove and the wire core channel 11.

[0032] The specific working process is as follows: When manufacturing a two-core parallel cable, firstly, the two cores are inserted into the core channel 11 from the rear end of the mold core 1; then, the position of the mold sleeve 2 is finely adjusted through the positioning adjustment hole 3 to ensure that the insulation layer or sheath layer forming groove is precisely aligned with the core channel 11; the insulating material flows in the mold and fills the insulation layer forming groove to form an insulation layer of uniform thickness. (Production demonstration shown) Figure 6 .

[0033] Example 2

[0034] The difference between this embodiment and embodiment 1 is that the arrangement of the metal conduit 11 is not limited to a parallel arrangement, but can be a triangular arrangement or a square arrangement; the number of metal conduits 11 can be 3, 4 or 1 in the center + 4 on the sides.

[0035] Example 3

[0036] The difference between this embodiment and embodiment 1 is that the die shape of die 21 is the same as the design shape of the extruded cable, and is not limited to dumbbell shape.

[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A two core parallel cable insulation extrusion die characterized by: It comprises a core (1), a sleeve (2) and a positioning adjusting hole (3), The core (1) is conical, and two metal wire tubes (11) are arranged in parallel in the center of the core (1); The sleeve (2) is step-cylindrical in shape, and the hollow part inside the sleeve (2) is conical, the conical angle of the sleeve (2) is larger than that of the core (1), so that when the sleeve (2) and the core (1) are combined together, an extrusion flow channel of insulating plastic is formed, and the die opening (21) of the sleeve (2) is composed of two parallel rings; The positioning adjusting hole (3) is arranged on the outside of the sleeve (2).

2. An insulation extrusion die for a two-core parallel cable according to claim 1, characterized in that: The inner diameter of the two metal wire tubes (11) is slightly larger than the outer diameter of the extruded wire conductor, and the conductor can smoothly pass through the metal wire tube (11) during work.

3. An insulation extrusion die for a two-core parallel cable according to claim 1, characterized in that: The rings of the sleeve (2) are close to each other, and the close part is disconnected, so that the two rings intersect to form a dumbbell-shaped die opening.

4. An insulation extrusion die for a two-core parallel cable according to claim 1, characterized in that: The arrangement of the metal wire tube (11) can be parallel, triangular or square; the number of the metal wire tube (11) can be 3, 4 or 1 in the center + 4 on the side.

5. An insulation extrusion die for a two-core parallel cable according to claim 1, characterized in that: The shape of the die opening (21) is the same as the designed shape of the extruded cable, which can be dumbbell-shaped.

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