What are the causes of defects in rubberized cables?

One of the cosmetic defects found in the production of wire and cable manufacturers is that the rubber sheathed cable conductors are too long or too short, the molds are not smooth, and the apertures are too large, which is due to low temperatures in the head, body, or molds; and the rubber material is less malleable. Clinker particles or impurities on the surface of rubber cables are caused by impurities in the rubber material; insufficient charring time of the rubber mixture; high temperature of the head, body and mold; poor rubber flow in the head, some rubber material stagnation in the dead space; screws are not smooth and sticky; Rubber sheathed cables are the common wires and cables in daily life. When producing rubber sheathed cables, wire and cable manufacturers encounter cosmetic defects. Let's look for the causes. Mold jacket is not smooth, no chamfer; mold mouth with impurities or cooked rubber particles blocked; vulcanization tube there is a pipe abrasion; vulcanization tube outlet sealing rubber washer aperture is small, etc. lead to scratches and abrasions on the surface of the rubber sheathed cable; rubber sheathed cable surface collapse reasons include mold jacket aperture is too large; conductive core outer strand between the strands, between the monofilament aperture bias, the core of the cable is not uniform in outer diameter; rubber material plasticity is small, poor adhesion; rubber material is not clean; on the mold Distance is small; pressure is small; the surface of the rubber cable twist pattern: mold sleeve aperture is too small; rubber material extrusion is not enough, the core gap is not filled; conductive core or cable core jumpers; short distance to the mold, etc.. Control cable is a wire and cable manufacturers, used in industrial and mining industries, energy and transportation sectors and AC voltage below 450/750V control and protection lines and other occasions of the cable, which is mostly PVC as the insulation sheath. Control cables for installation and wiring, the eaves pay attention to not be directly exposed to sunlight or higher temperatures, wire and cable manufacturers recommend the use of pipelines for wiring, standard LAN cables can be applied; wiring on the outside wall, the same attention should be paid to avoid direct sunlight, but also to prevent human damage. Note that cables installed in metal pipes or trunking will be affected by high temperatures, shortening the service life, the installation of high-temperature-resistant materials to choose the cable.

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