Why are there wrinkles on the surface of the Automotive Wiring Harness Protection Sleeve?

Automotive Wiring Harness Protection Sleeve are mainly divided into Braided Sleeve and Cable Sleeve, which are mainly extruded by extrusion equipment during production. So the extruded products sometimes appear wrinkled, what causes such problems?

1. It may be that the Braided Sleeve and Cable Sleeve products are too thin or the products are unilateral.
2. It may be that the re-remelting of the rubber material is not in place and the heat-refining is uneven.
3. The extrusion temperature is high.
4. It is difficult for the material to be unevenly stressed when extruding a thinner product with a large surface area, because it will be affected by many factors, especially the mold.
5. The amount of glue output from the mouth shape is inconsistent, and the glue output is too fast.
①If the product is too thin, do not consider extrusion, as the pass rate of extrusion will be very low, you can choose to use calendering.
②The mixing of the compound rubber is uneven, the Mooney can be raised a bit, and the size stability and appearance will be improved.
③The temperature of the extruder and the speed of the screw can be adjusted, and a slight decrease will have a certain effect.
④ If the glue comes out too fast, you can block it in the flow channel to increase the resistance and reduce the glue output.