What causes defects in the appearance of wires and cables

What problems can improper selection of mold sleeves for Shaanxi wire and cable lead to? Improper selection of mold sleeves often leads to appearance defects and uneven surfaces during the production process of rubber sheathed wires and cables; There are clinker particles (early vulcanized rubber particles) or impurities on the surface; Scratches and abrasions on the surface of wires and cables; Surface collapse; There are Fried Dough Twists patterns on the surface. The following five common causes of appearance defects in rubber sheathed cables are as follows:

What causes defects in the appearance of wires and cables

Front facing, mold sleeve support line too long or too short, mold mouth not smooth and aperture too large; Low temperature of the machine head, die or body; Rubber materials with low plasticity may cause the surface of rubber sheathed cables to be uneven.

The rubber supplied during the manufacturing of wires and cables is not clean and contains impurities; The burning time of the rubber material is too short; The temperature of the extruded rubber body, nose or mouth mold is too high; The rubber flow inside the machine head is not smooth, and there are blind spots where rubber material is trapped; Unsmooth screws and adhesives may cause the appearance of clinker particles (early vulcanized rubber particles) or impurities on the surface of rubber sheathed cables due to high-voltage cables.

The mold sleeve is not smooth and has no chamfer; Impurities or cooked glue particles block the mold mouth; Scratches caused by dragging the vulcanized tube inside; The small aperture of the sealing rubber gasket at the outlet of the vulcanized pipe may cause scratches and abrasions on the surface of the rubber sleeve cable.

The aperture of the mold sleeve is too large; The gaps between the outer layers of the conductive wire core and between single wires are too large, and the outer diameter of the cable core is uneven; Rubber has low plasticity and poor viscosity; Jin Huan Yu's wire and cable editor reminds that there are impurities in the rubber material when manufacturing wires and cables; Small distance between molds and low pressure may lead to surface collapse of rubber sheathed cables.

The aperture of the mold sleeve is too small; Insufficient extrusion of rubber material and insufficient filling of gaps in the wire core; Conductive wire core or cable core jumper; Jinhuanyu wire and cable small braids remind that short distance of mold alignment may lead to Fried Dough Twists lines on the surface of rubber sheathed cables.