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In the production process of rubber cable, appearance defects often occur, such as the surface is not smooth; clinker particles or impurities on the surface; wire and cable surface scratches, scratches; surface collapse; surface hemp patterns. The following are the five common causes of appearance defects in rubber cable:

1. Molded wire is too long or too short, die mouth is not smooth and the hole diameter is too large; the head, die or body temperature is low; the plastic material of the rubber is small, etc., all of which may cause the surface of the rubber sheath cable to be not smooth.

2. The supplied rubber is not clean and contains impurities; the scorching time of the rubber compound is too short; the temperature of the extruded rubber body, head or die is too high.

3 mold sets are not smooth, no chamfering; there are impurities or rubber particles blocking the die mouth; drag pipe in the vulcanization tube scratches; may lead to scratches on the rubber cable surface, scratches.

4. The die set hole diameter is too large; between the outer strands of the conductive wire core, the gap between the monofilaments is larger, and the core diameter is not uniform; the rubber material has a small plasticity, and the adhesiveness is poor; the rubber material has impurities; the distance between the molds is small; Small pressure, etc. may cause the surface of the rubber cable to collapse.

5. The die set hole diameter is too small; insufficient extrusion of the rubber material, filling of the core gap; conductive wire core or cable jumper; short distance between the die and the like may cause hemp patterns on the surface of the rubber sheath cable.

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