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Coaxial cable manufacturing method

A coaxial cable and inner conductor technology, applied in the manufacture of coaxial cables, etc., can solve the problem of poor signal shielding effect of coaxial cables, poor flame retardancy and oxidation resistance of the outer sheath, and high bending flexibility of coaxial cables And other problems, to achieve the effect of reducing bending flexibility, good signal shielding effect, and reasonable structure ratio

Inactive Publication Date: 2015-01-14
中山市鸿程科研技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Coaxial cables can be divided into baseband coaxial cables and broadband coaxial cables (that is, network coaxial cables and video coaxial cables) in terms of usage. Coaxial cables are divided into 50Ω baseband cables and 75Ω broadband cables. Baseband cables are divided into two types: Thin coaxial cable and thick coaxial cable, the baseband cable is only used for digital transmission, and the data rate can reach 10Mbps. For example, the patent number 201110169520.1 is a coaxial cable and its production process, which aims to provide a kind of coaxial cable that is not easy to be affected by moisture and has high transmission quality. Stable, good electrical performance coaxial cable and its production process, the coaxial cable includes an inner conductor, an outer conductor, an outer sheath, a combined insulating layer, and the combined insulating layer includes an inner thin layer, a foamed an insulating layer and an outer thin layer, the inner thin layer, the foamed insulating layer, and the outer thin layer are sequentially wrapped around the periphery of the inner conductor from the inside to the outside, and the outer layer is arranged on the periphery of the outer thin layer, The outer sheath is wrapped on the outside of the outer conductor. The present invention can be widely used in the coaxial cable and its production field, but the signal shielding effect of the coaxial cable prepared in this way is not good, and the bending flexibility of the coaxial cable is too high. Large, it is easy to break the outer sheath, expose the shielding layer, and affect the shielding effect, and the flame retardant and oxidation resistance of the outer sheath is not good, it is easy to age, and the inner conductor is used for a long time, and the heat dissipation is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a coaxial cable, the coaxial cable includes an inner conductor, an insulating layer is provided outside the inner conductor, the insulating layer includes a rubber layer and a foam layer, and a shielding layer is provided outside the insulating layer, The shielding layer is provided with an outer sheath, and the preparation method comprises the following steps:

[0021] (1) Take the oxygen-free copper core as the inner conductor. After straightening in the straightening device, set the diameter to 3mm in the drawing die. After ultrasonic cleaning with acetone and deionized water respectively, dry the surface with nitrogen. After heating and melting in the reaction kettle, use a high-pressure spray gun to evenly spray onto the surface of the oxygen-free copper core, and the thickness of the silver layer is 0.15mm;

[0022] (2) Put a mold with a steel core on the inner conductor, heat the fluororubber to melt and fix the outer layer of the inner...

Embodiment 2

[0028] Example 2: The rest are the same as in Example 1, except that in step (1), the diameter of the oxygen-free copper core is 1.8 mm, the thickness of the silver-plated layer is 0.18 mm, and in step (2), the thickness of the rubber layer is 0.3 mm. mm, in step (3), the ratio of polyethylene and nucleating agent is 10:0.4, the mixing temperature is 200°C, the thickness of the foam layer is 1mm, in step (4), the temperature of the three-step cooling is 48°C , 35°C, 20°C, in step (6), 30% aluminum hydroxide, 12% magnesium hydroxide, 30% ethylene-vinyl acetate copolymer, 15% linear low-density polyethylene, ethylene-vinyl acetate grafted horse Toric anhydride 10%, triphenyl phosphite 0.8%, vinyl tris(β-methoxyethoxy) silane 1%, zinc stearate 1.2%.

Embodiment 3

[0029] Example 3: The rest are the same as in Example 1, except that the diameter of the oxygen-free copper core is 2 mm, the thickness of the silver-plated layer is 0.25 mm, and in step (3), the ratio of polyethylene to the nucleating agent is 10:0.5, The mixing temperature is 250°C, and the thickness of the foam layer is 0.5mm. In step (4), the cooling temperatures of the three steps are 50°C, 40°C, and 30°C respectively. In step (5), one layer of aluminum foil is used as a shielding layer. , step (6), 5% maleic anhydride grafted with ethylene.

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Abstract

The invention discloses a coaxial cable manufacturing method, and relates to the field of cable machining. A coaxial cable comprises an inner conductor, an insulating layer, a shielding layer and an outer sheath. The insulating layer comprises a rubber layer and a foaming layer. An anaerobic copper core is adopted as the inner conductor, after straightening, sizing and ultrasonic cleaning, the surface of the anaerobic copper core is dried through nitrogen, silver paste is evenly sprayed to the surface of the anaerobic copper core through a high-pressure spraying gun, and the inner conductor is obtained. According to the coaxial cable manufacturing method, a silver coating is coated on the anaerobic copper core, the oxidation resistance of the copper core is protected, the service life of the copper core is prolonged, the signal transduction directivity and quality of signals are improved, the rubber layer is arranged outside the inner conductor, the bending flexibility of the coaxial cable is lowered, heat dissipation holes are formed in the rubber layer, heat generated in the working process of the inner conductor can be helped to be dissipated, the long-term working resistance is lowered, the current is increased, inflaming retarding components of aluminum hydroxide and magnesium hydroxide are added in the outer sheath, triphenyl phosphate serves as antioxidants, and the performance of the inflaming retarding and ageing resistance of the outer sheath is improved.

Description

technical field [0001] The invention relates to the field of cable processing, in particular to a preparation method of a coaxial cable. Background technique [0002] Coaxial cables can be divided into baseband coaxial cables and broadband coaxial cables (that is, network coaxial cables and video coaxial cables) in terms of usage. Coaxial cables are divided into 50Ω baseband cables and 75Ω broadband cables. Baseband cables are divided into two types: Thin coaxial cable and thick coaxial cable, the baseband cable is only used for digital transmission, and the data rate can reach 10Mbps. For example, the patent number 201110169520.1 is a coaxial cable and its production process, which aims to provide a kind of coaxial cable that is not easy to be affected by moisture and has high transmission quality. Stable, good electrical performance coaxial cable and its production process, the coaxial cable includes an inner conductor, an outer conductor, an outer sheath, a combined insul...

Claims

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Application Information

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IPC IPC(8): H01B13/016
Inventor 李丽娟王建武
Owner 中山市鸿程科研技术服务有限公司
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