Physical foaming method for producing electric cable

A physical foaming and cable technology, applied in the direction of insulating conductors/cables, can solve the problems of increasing workload and difficulty, increasing product cost, affecting product performance, etc., to improve product quality, increase production speed, The effect of product rejection rate reduction

Inactive Publication Date: 2006-08-23
四川爱通线缆股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the upgrading of CATV network and mobile communication in large and medium-sized cities in China, the requirements for physical foaming production lines are getting higher and higher. At present, the shortcomings of domestic physical foaming production lines are exposed more and more, mainly: screw paste Seriously, the screw should be cleaned at least twice a week, which increases the workload and difficulty of the work, and sometimes there is no periodic paste, which affects the product performance and increases the product cost; the foaming degree is limited, and the foaming stability is poor; For this reason, cable manufacturing needs a technology to improve the performance of foamed cable products and overcome the above shortcomings

Method used

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  • Physical foaming method for producing electric cable

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Effect test

Embodiment 1

[0017] Embodiment 1: Utilize the method of the present invention to produce SYWY-75-7 product.

[0018] Raw material preparation: electrical round copper wire Ф0.12, 99.99% industrial nitrogen, 1I2A-1LDPE, HD6070EAHDPE, nucleating agent. The raw materials required by the present invention are electrical round copper wire Ф0.12, 99.99% industrial nitrogen, 1I2A-1LDPE, HD6070EAHDPE, nucleating agent, special material for physical foaming, etc. can be purchased in the domestic market. PE plastic pellets are purchased by companies such as Beijing Yanshan Petrochemical Company or Xinjiang Dushanzi Petrochemical Company. Copper wires are purchased from Chengdu Shuangliu Copper Material Factory or Deyang Jingchang Copper Wire Factory.

[0019] Process indicators: product specification SYWV-75-5, air injection aperture 0.8mm, air injection pressure 3Mpa, inner skin mold core aperture Ф1.05, inner skin mold sleeve aperture Ф1.10, foam core aperture Ф1.30, foaming mold Hole diameter Ф...

Embodiment 2

[0023] Embodiment 2: Utilize the method of the present invention to produce SYWLY-75-12 product.

[0024] Raw material preparation: electrical round copper wire Ф2.77, 99.99% industrial nitrogen, 1I2A-1LDPE, HD6070EAHDPE, nucleating agent. Electrical round copper wire Ф2.2, 99.99% industrial nitrogen, 1I2A-1LDPE, HD6070EAHDPE, nucleating agent, special materials for physical foaming, etc. can all be purchased in the domestic market. PE plastic pellets are purchased by companies such as Beijing Yanshan Petrochemical Company or Xinjiang Dushanzi Petrochemical Company. Copper wires are purchased from Chengdu Shuangliu Copper Material Factory or Deyang Jingchang Copper Wire Factory. Aluminum strips are purchased from Chengdu Cable Factory Aluminum Strip Branch or Shaanxi Qinlong Company.

[0025] Process index control: product specification SYWLY-75-12, air injection aperture Ф1mm, air injection pressure 4Mpa, inner skin mold core aperture Ф2.8mm, inner skin mold sleeve aperture...

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Abstract

The present invention belongs to the field of electric cable producing technology, and is especially physical foaming method of producing electric cable. The physical foaming method is that industrial nitrogen in certain pressure is injected through injection holes of certain aperture into fused plastic to reach the foaming aim. The present invention has homogeneous, stable and controllable foaming degree and raised product performance, and may be used widely in electric cable production.

Description

technical field [0001] The invention belongs to the technical field of cable production, and in particular relates to the physical foaming technology for the production of coaxial cables and communication cables. Background technique [0002] Physically foamed polyethylene coaxial RF cables mainly use the principle of physical foaming to make the insulating medium after foaming the polyethylene material achieve high uniformity, low loss, and high transmission efficiency. The principle of physical foaming is mainly to achieve the purpose of foaming by injecting a certain amount of gas into the foaming process. With the upgrading of CATV network and mobile communication in large and medium-sized cities in China, the requirements for physical foaming production lines are getting higher and higher. At present, the shortcomings of domestic physical foaming production lines are exposed more and more, mainly: screw paste Seriously, the screw should be cleaned at least twice a week...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/08B29C44/20B29C47/92B29C47/66H01B13/14B29C48/92
CPCB29C47/92
Inventor 钟跃进张建富
Owner 四川爱通线缆股份有限公司
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