Cable extrusion test run process

Abstract

The invention discloses a cable extrusion test run process, comprising: 1) selecting a mold core and a mold sleeve according to the cable extrusion thickness, inserting a wedge-shaped ruler into the gap between the mold core and the mold sleeve to measure after the two are installed, Precisely adjust the coaxiality of the core and the mold sleeve; 2) Realize the process forward for the cable extrusion process, that is, formulate the best process parameters for the cable model, cable raw material and indoor temperature, that is, the glue output, pulling speed and indoor temperature. Set the temperature to a fixed value, adjust the plasticizing temperature as a variable, try to manufacture five plasticized finished products at different temperatures, conduct insulation voltage, tensile strength, elongation at break and thermal extension) tests, and compare the test results. The plasticizing temperature value with the best electrical and mechanical properties, as the best parameter value of this type of processing technology, has become a standard process. The invention precisely adjusts the mold before the cable is extruded, ensures the structure precision, is easy to use, has strong operability, and can effectively reduce the reject rate in the cable manufacturing process.

Description

technical field [0001] The invention relates to a cable extrusion test run process. Background technique [0002] The extrusion process in cable manufacturing is a special process, the processing quality is not easy or cannot be fully verified through product inspection, and once a problem is found, the product quality cannot be guaranteed through rework, repair and other means. During the cable extrusion process, in order to prevent the problems of out-of-tolerance concentricity and plasticization of the cable insulation layer, it is necessary to adjust the distance between the mold core and the mold sleeve, the amount of glue output, the pulling speed, and the heating in the extruder before production. A series of parameters such as the temperature of the area and the nose, that is, the test run. During the test run, due to the uneven technical level of the operators and the backward processing technology, a large amount of waste will inevitably be generated, resulting in...

AI Technical Summary

Problems solved by technology

Due to the uneven technical level of the operators and the backward processing technology during the test run, a large amount of waste will inevitably be generated, resulting in an increase in product costs and a decrease in production efficiency

What's more serious is that in order to reduce costs, some enterprises crush waste materials and reuse them, which poses a huge hidden danger to the quality and safety of cables.

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