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CN-224210493-U - Forming die for cable sheath

CN224210493UCN 224210493 UCN224210493 UCN 224210493UCN-224210493-U

Abstract

The utility model discloses a forming die for a cable sheath, which comprises an extrusion molding head, wherein the extrusion molding head comprises an inlet section (1), a forming section (2) and an outlet section (3), the inlet section (1), the forming section (2) and the outlet section (3) are sequentially arranged along the forming moving direction of a cable, the inlet section (1) and the forming section (2) are arranged on the inner wall of the extrusion molding head, the forming section (2) is horizontally arranged, and a layer of PVD (physical vapor deposition) layer (4) is coated on the forming section (2). The utility model provides a forming die for a cable sheath, which is used for ensuring the forming quality of a protective layer of a long-length cable in a forming process.

Inventors

  • GE DONGDONG
  • DENG XUEJIAO
  • ZHOU JIRUI
  • CHEN RENDONG
  • LIU ZHIYU
  • ZHANG XIHONG

Assignees

  • 宁波东方电缆股份有限公司

Dates

Publication Date
20260508
Application Date
20250522

Claims (9)

  1. 1. A forming die for a cable sheath comprises an extrusion molding head and is characterized in that the extrusion molding head comprises an inlet section (1), a forming section (2) and an outlet section (3), the inlet section (1), the forming section (2) and the outlet section (3) are sequentially arranged along the forming moving direction of a cable, the inlet section (1) and the forming section (2) are arranged on the inner wall of the extrusion molding head, the forming section (2) is horizontally arranged, and a layer of PVD (physical vapor deposition) layer (4) is coated on the forming section (2).
  2. 2. The molding die for the cable sheath according to claim 1, wherein the extrusion head is used for extrusion molding of the nonmetallic protective layer, and the PVD layer (4) is mainly made of CrN/CrON.
  3. 3. The molding die for the cable sheath according to claim 2, wherein the outlet section (3) is arranged perpendicular to the molding section (2), and the outlet section (3) is also coated with a PVD layer (4).
  4. 4. A molding die for a cable sheath according to claim 3, wherein the outlet section (3) is provided with a coating groove (3.1) for coating the PVD layer (4).
  5. 5. The forming die for the cable sheath according to claim 2, characterized in that the inlet section (1) is provided in a reduced diameter, the smallest diameter of the inlet section (1) is equal to the diameter of the forming section (2), and the inlet section (1) is also coated with a PVD layer (4).
  6. 6. The molding die for the cable sheath according to claim 1, wherein the extrusion head is used for extrusion molding of the metal sheath, and the PVD layer (4) is made of TiAIN as a main material.
  7. 7. The molding die for the cable sheath as claimed in claim 6, wherein the inlet section (1) is provided in a reduced diameter, the minimum diameter of the inlet section (1) is equal to the diameter of the molding section (2), and the inlet section (1) is also coated with a PVD layer (4).
  8. 8. The mold for the sheath of electrical cable according to claim 6, wherein the outlet section (3) is provided with an enlarged diameter for water cooling, and the smallest diameter of the outlet section (3) is equal to the diameter of the molding section (2).
  9. 9. The forming die for a cable sheath according to claim 8, wherein the diameter-enlarging inclination angle of the outlet section (3) is not less than 20 °.

Description

Forming die for cable sheath Technical Field The utility model relates to the field of cable production dies, in particular to a forming die for a cable sheath. Background The protective layer of the cable comprises an insulating layer, an inner protective layer, an outer protective layer, a metal protective layer and other structures, when the protective layer of the cable with a large length is produced, the phenomenon of die droping occurs when the nonmetallic protective layer is extruded out of the extrusion molding head, so that the defects of rough surface, uneven thickness, even scorching and the like of the nonmetallic protective layer are caused, the usability and the use safety of the cable are seriously influenced, and after the metallic protective layer is used for a long time, the extrusion molding head and the protective layer are mutually penetrated due to the mutual permeability of high-temperature metal, so that the structure of the extrusion molding head is deformed, and the defects of rough surface, uneven thickness, poor quality and the like of the metallic protective layer are caused. Disclosure of Invention The utility model aims to solve the technical problem of providing a forming die for a cable sheath, which is used for ensuring the forming quality of a protective layer of a long-length cable in the forming process. The utility model solves the above problems by adopting the technical scheme that the forming die for the cable sheath comprises an extrusion molding head, wherein the extrusion molding head comprises an inlet section, a forming section and an outlet section, the inlet section, the forming section and the outlet section are sequentially arranged along the forming moving direction of a cable, the inlet section and the forming section are arranged on the inner wall of the extrusion molding head, the forming section is horizontally arranged, and a layer of PVD layer is coated on the forming section. Compared with the prior art, the PVD coating has the advantages that the PVD coating is coated on the forming section, so that the forming section has high wear resistance, high corrosion resistance and high anti-adhesion performance, the use strength of the extrusion molding head is greatly improved, the adhesion and penetration influence between the extrusion molding head and the protective layer material can be avoided, and the forming quality of the protective layer is ensured. As an improvement of the utility model, the extrusion molding head is used for extrusion molding of the nonmetallic protective layer, the main material of the PVD layer is CrN/CrON, through the improvement, the phenomenon of die drool is mainly prevented in the molding process of the nonmetallic protective layer, and the anti-sticking property of the extrusion molding head can be greatly improved by utilizing the PVD layer of CrN/CrON, so that the phenomenon of drool caused by the viscosity of the extrusion molding head to the nonmetallic protective layer is avoided, and the quality of the nonmetallic protective layer is ensured. As an improvement of the utility model, the outlet section is arranged perpendicular to the forming section, and is also coated with a PVD layer, through the improvement, after the nonmetallic protective layer is separated from the forming section, the nonmetallic protective layer can be quickly cooled and shaped after meeting air, but the nonmetallic material is not enough and flexible, so that the outlet section adopts a structural design perpendicular to the forming section, the contact between the nonmetallic protective layer and the outlet section can be reduced, but if the temperature of the extrusion molding head is too high, the nonmetallic protective layer cannot be sufficiently cooled when the nonmetallic protective layer is separated from the forming section, the nonmetallic protective layer is still in contact with the outlet section, and therefore, the outlet section is also coated with the PVD layer. As an improvement of the utility model, the outlet section is provided with a coating groove for coating the PVD layer, by which an area for coating the PVD layer is formed in the outlet section, and the PVD layer coated on the outlet section cannot contact with subsequent equipment when the outlet section is connected with the subsequent equipment, so that the integrity of the PVD layer of the outlet section is ensured during use and is not easy to damage. According to the utility model, the inlet section is arranged in a diameter-reduced manner, the minimum diameter of the inlet section is equal to the diameter of the forming section, the inlet section is also coated with a PVD layer, through the improvement, the smoothness of nonmetallic material flowing in the inlet section can be improved by utilizing the anti-sticking property of the PVD layer when the PVD layer is coated on the inlet section, the service life of the extrusion molding head is prolonged by uti