Method for fabricating insulating layer of Teflon for coaxial cable
A technology for coaxial cables and manufacturing methods, applied in the direction of manufacturing coaxial cables, insulating conductors/cables, coaxial cables/analog cables, etc., can solve the problems of increasing equipment costs, increasing material costs, etc., and reduce production and manufacturing costs Effect
Active Publication Date: 2009-09-02
KINGSIGNAL TECHNOLOGY CO LTD
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Problems solved by technology
[0008] 1. In order to ensure the stability of the electrical performance of the coaxial cable, the requirements for the accuracy of the wrapping and the uniformity of the tension are extremely high, which puts forward high requirements for the accuracy of the wrapping equipment and greatly increases the cost of the equipment. The existing foreign imports The wrapping equipment is at least USD 400,000 each
[0009] 2. The properties of selected Teflon raw materials (such as tension, density and other physical properties) require a high degree of consistency and stability, which greatly increases the cost of materials
Method used
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Embodiment Construction
[0020] Such as figure 1 Shown, the coaxial cable teflon insulating layer manufacturing method flow process of the present invention is:
[0021] 1. Freeze the Teflon raw material, then mix the frozen raw material and additive oil evenly, and mature for a certain period of time;
[0022] 2. Extrude the mixture together with the inner conductor of the cable from the mold to obtain the extruded core wire;
[0023] 3. Fumigate the extruded core wire at low temperature;
[0024] 4. Sinter the extruded core wire after low-temperature fumigation at high temperature to obtain a Teflon insulating layer that meets the requirements.
[0025] In the above step 3, the low-temperature fumigation is usually carried out in a sintering furnace, and can be carried out in special fumigation equipment. Experiments have proved that the temperature of low-temperature fumigation can be 100 to 250 degrees. When the temperature of low-temperature fumigation is 110 degrees, a good quality coaxial ca...
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The invention relates to a method for manufacturing a Teflon insulating layer of a coaxial cable. extruding in a mold to obtain an extruded core wire, and performing high-temperature sintering on the extruded core wire, which is characterized in that, before sintering the extruded core wire, a step of low-temperature fumigation is also included. The method for manufacturing the Teflon insulating layer of the coaxial cable of the present invention volatilizes the auxiliary oil in the Teflon through the low-temperature fumigation step, and the space originally occupied by the oil molecules is filled by the air molecules, and the air molecules and the Teflon molecules The mixing of Teflon greatly reduces the dielectric constant of the Teflon insulating layer. This method has no special requirements for the coaxial cable manufacturing equipment and Teflon raw materials, and can be realized by using general-purpose equipment and raw materials. Therefore, compared with the existing technology , greatly reducing the manufacturing cost.
Description
technical field [0001] The invention relates to a method for manufacturing a coaxial cable, more specifically, a method for manufacturing a Teflon insulating layer of a coaxial cable. Background technique [0002] Teflon (polytetrafluoroethylene PTFE) is used in the manufacture of coaxial cable insulation to obtain low-loss coaxial cables to meet the needs of radar, electronic countermeasures, etc., to ensure that they are in various harsh environments and subjected to mechanical bending When the cable can maintain good electrical characteristics requirements, while the loss of the cable signal can be minimized. [0003] The dielectric constant of solid-core Teflon is 2.05~2.08. Such a high dielectric constant prevents the signal from being completely transmitted to the other end during cable transmission (especially for long-distance high-frequency signal transmission), resulting in cable transmission Generally, the greater the attenuation of the signal, the greater the po...
Claims
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IPC IPC(8): H01B13/016H01B13/14H01B11/18
Inventor 黄昌华王志明李军桂宏兵
Owner KINGSIGNAL TECHNOLOGY CO LTD