Extrusion jig for nylon sheath layer of cable

Abstract

The utility model relates to the technical field of wire processing jigs, in particular to a nylon sheath wire jig which is characterized in that the angle of a conical surface of an inner die is 25-35 degrees, the angle of a conical hole of an outer die is 50-60 degrees, the diameter of a second round hole is 0.1-0.3 mm larger than the outer diameter of a cable nylon sheath layer, and the diameter of a first round hole is 0.4-0.5 mm larger than the outer diameter of a semi-finished product core wire. The outer diameter of the tail end of the conical face is 0.2-0.4 mm larger than the diameter of the first round hole. The angle of the conical surface of the inner mold and the angle of the conical hole of the outer mold are reasonably designed, the appropriate diameter of the first round hole 12 is set according to the outer diameter of a semi-finished product core wire, the diameter of the second round hole and the outer diameter of the tail end of the conical surface are designed according to the outer diameter of a nylon sheath layer, and reasonable matching of the angles and structures of the inner mold and the outer mold is utilized; the pressure of the nylon material passing through the jig is regulated and controlled, so that the nylon material can be uniformly attached to a semi-finished product core wire during extrusion, the frequency of material breakage and eccentricity during extrusion of the nylon material is reduced, and the extrusion quality of a nylon sheath layer is improved.

Description

Technical Field

[0001] This application relates to the field of wire processing fixtures, and in particular to a nylon sheathed wire fixture. Background Technology

[0002] Currently, there are many types of insulation materials for wire sheaths. Different types of cables use different sheath materials. Generally, insulation materials are extruded onto the surface of the wire using an extruder to form the sheath layer.

[0003] Nylon materials possess excellent high-temperature resistance, as well as good mechanical and electrical insulation properties. Nylon-sheathed wires are widely used in low-voltage wiring for aircraft and wiring for highway monitoring equipment. Currently, during the extrusion process, the pressure from the die angle and aperture can cause material breakage or eccentricity defects in the nylon sheath. Furthermore, when the semi-finished product has printed content, there is a risk of the printed content being scratched, resulting in poor printing and affecting customer processing and use. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a nylon sheath extrusion fixture for cables, comprising an inner mold and an outer mold. One end of the inner mold has a tapered surface on its outer surface, and the inner mold has a first circular hole through which a semi-finished core wire passes. One end face of the outer mold has a tapered hole, and the other end face of the outer mold has a second circular hole communicating with the tapered hole. The angle of the tapered hole is 50-60°, and the angle of the tapered surface is 25-35°. The diameter of the second circular hole is 0.1-0.3 mm larger than the outer diameter of the nylon sheath of the cable, the diameter of the first circular hole is 0.4-0.5 mm larger than the outer diameter of the semi-finished core wire, and the outer diameter of the end of the tapered surface is 0.2-0.4 mm larger than the diameter of the first circular hole.

[0005] Preferably, the angle of the conical surface is 30°.

[0006] Preferably, the angle of the tapered hole is 50°.

[0007] Preferably, the diameter of the second circular hole is 0.2 mm larger than the outer diameter of the nylon sheath layer of the cable.

[0008] Preferably, the diameter of the first circular hole is 0.4 mm larger than the outer diameter of the semi-finished core wire.

[0009] Preferably, the outer diameter of the end of the tapered surface is 0.3 mm larger than the diameter of the first circular hole.

[0010] As can be seen from the above, the following beneficial effects can be obtained by applying the method provided in this application: By designing the conical surface angle of the inner mold to be 25-35°, the conical hole angle of the outer mold to be 50-60°, the diameter of the second circular hole to be 0.1-0.3 mm larger than the outer diameter of the nylon sheath layer of the cable, the diameter of the first circular hole to be 0.4-0.5 mm larger than the outer diameter of the semi-finished core wire, and the outer diameter of the end of the conical surface to be 0.2-0.4 mm larger than the diameter of the first circular hole, by reasonably designing the angle of the conical surface of the inner mold and the angle of the conical hole of the outer mold, and by setting a suitable diameter of the first circular hole 12 according to the outer diameter of the semi-finished core wire, and by designing the diameter of the second circular hole and the outer diameter of the end of the conical surface according to the outer diameter of the nylon sheath layer, the pressure of the nylon material when passing through the fixture can be controlled by using the reasonable combination of the angle and structure of the inner and outer molds, so that the nylon material can be evenly attached to the semi-finished core wire during extrusion, reducing the frequency of material breakage and eccentricity during extrusion, and improving the extrusion quality of the nylon sheath layer. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only a part of the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the nylon sheath extrusion fixture for the cable according to an embodiment of this application;

[0013] Figure 2 This is a diagram of the nylon sheath extrusion fixture assembly for the cable according to an embodiment of this application. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0015] Example

[0016] To address the aforementioned technical problems, this embodiment provides a nylon sheath extrusion fixture for cables, such as... Figure 1-2As shown, the device includes an inner mold 10 and an outer mold 20. The outer surface of one end of the inner mold 10 has a tapered surface 11. The inner mold 10 has a first circular hole 12 for the semi-finished core wire to pass through. One end face of the outer mold 20 has a tapered hole 21. The other end face of the outer mold 20 has a second circular hole 22 that connects to the tapered hole 21. The angle α of the tapered hole 21 is 50-60°, the angle β of the tapered surface 11 is 25-35°, the diameter of the second circular hole 22 is 0.1-0.3 mm larger than the outer diameter of the nylon sheath layer of the cable, the diameter of the first circular hole 12 is 0.4-0.5 mm larger than the outer diameter of the semi-finished core wire, and the outer diameter of the end of the tapered surface 11 is 0.2-0.4 mm larger than the diameter of the first circular hole 12. By rationally designing the angle of the conical surface 11 of the inner mold 10 and the angle of the conical hole 21 of the outer mold 20, and setting a suitable diameter of the first circular hole 12 according to the outer diameter of the semi-finished core wire, and designing the diameter of the second circular hole 22 and the outer diameter of the end of the conical surface 11 according to the outer diameter of the nylon sheath layer, the pressure of the nylon material when passing through the fixture can be controlled by the reasonable combination of the angles and structures of the inner mold 10 and the outer mold 20. This allows the nylon material to be evenly attached to the semi-finished core wire during extrusion, reducing the frequency of material breakage and eccentricity during extrusion, improving the extrusion quality of the nylon sheath layer, meeting the processing requirements of the wire, and reducing debugging and scrap.

[0017] Specifically, the inner mold 10 has a through groove along its center. The through groove transitions through a tapered hole and connects to the first circular hole 12. The semi-finished core wire enters the through groove, exits through the first circular hole 12, and moves to the tapered hole 21 and the second circular hole 22 of the outer mold 20. The nylon sheath material flows along the area between the tapered hole 21 and the tapered surface 11 to the end of the tapered surface 11, covering the semi-finished core wire to form a nylon sheath layer, ultimately resulting in the finished cable. The angle β of the tapered surface 11 is 30°, and the angle α of the tapered hole 21 is 50°.

[0018] Furthermore, since the inner mold 10 and the outer mold 20 are fixed in position after being installed in the extruder, the size of the nylon sheath material inflow area is controlled by designing the angle of the conical hole 21 and the conical surface 11, and the gap between the inner mold 10 and the outer mold 20 is controlled by designing the outer diameter D3 at the end of the conical surface 11. This regulates the pressure of the nylon material when it is extruded through the fixture, reduces the frequency of material breakage and eccentricity during extrusion, and improves the extrusion quality of the nylon sheath layer.

[0019] In a preferred embodiment, the diameter D1 of the second circular hole 22 is 0.2 mm larger than the outer diameter of the nylon sheath layer of the cable, the diameter D2 of the first circular hole 12 is 0.4 mm larger than the outer diameter of the semi-finished core wire, and the outer diameter D3 of the end of the tapered surface 11 is 0.3 mm larger than the diameter D2 of the first circular hole 12.

[0020] In summary, the proposed solution designs the conical surface of the inner mold with an angle of 25-35°, the conical hole of the outer mold with an angle of 50-60°, the diameter of the second circular hole is 0.1-0.3 mm larger than the outer diameter of the nylon sheath layer of the cable, the diameter of the first circular hole is 0.4-0.5 mm larger than the outer diameter of the semi-finished core wire, and the outer diameter of the end of the conical surface is 0.2-0.4 mm larger than the diameter of the first circular hole. By rationally designing the angles of the conical surface of the inner mold and the conical hole of the outer mold, setting a suitable diameter of the first circular hole 12 according to the outer diameter of the semi-finished core wire, and designing the diameter of the second circular hole and the outer diameter of the end of the conical surface according to the outer diameter of the nylon sheath layer, the pressure of the nylon material when passing through the fixture is controlled through the reasonable combination of the angles and structures of the inner and outer molds. This allows the nylon material to adhere evenly to the semi-finished core wire during extrusion, reducing the frequency of material breakage and eccentricity during extrusion, and improving the extrusion quality of the nylon sheath layer.

[0021] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. A nylon jacketing layer extrusion tool for cables, characterized by: The application relates to a cable moulding device, which comprises an inner mould (10) and an outer mould (20), the outer surface of one end of the inner mould (10) is formed with a taper surface (11), the inner mould (10) is provided with a first circular hole (12) for a semi-finished core wire to pass through, the one end surface of the outer mould (20) is provided with a taper hole (21), the other end surface of the outer mould (20) is formed with a second circular hole (22) which is communicated with the taper hole (21), the angle of the taper hole (21) is 50-60 DEG, the angle of the taper surface (11) is 25-35 DEG, the diameter of the second circular hole (22) is 0.1-0.3 mm larger than the outer diameter of a cable nylon sheath layer, the diameter of the first circular hole (12) is 0.4-0.5 mm larger than the outer diameter of a semi-finished core wire, and the outer diameter of the end of the taper surface (11) is 0.2-0.4 mm larger than the diameter of the first circular hole (12). The angle of the taper surface (11) is 30 DEG. The angle of the taper hole (21) is 50 DEG. The diameter of the second circular hole (22) is 0.2 mm larger than the outer diameter of a cable nylon sheath layer. The diameter of the first circular hole (12) is 0.4 mm larger than the outer diameter of a semi-finished core wire. The outer diameter of the end of the taper surface (11) is 0.3 mm larger than the diameter of the first circular hole (12).

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