Causes and Solutions of Defects in Automotive Wiring Harness Protection Sleeve

The processing methods of Automotive Wiring Harness Protection Sleeve are generally: "extrusion" and "molding". Molding: It is to make the powder flake-like rubber block into a blank with a shape similar to the product, put it in a heated mold cavity, then close the mold and pressurize it, make it molded and solidified or vulcanized, and then get the product after demoulding , This method is especially suitable for the molding and processing of thermosetting products. Molded products can be made into any shape; however, the production cycle of molded products is long, the cost is high, and many burrs and waste products will be generated in the production process. The following editor will introduce the reasons and solutions for the defects of the Automotive Wiring Harness Protection Sleeve one by one.

1. Blistering
Cause: The molding material is not fully cured, and the mold temperature is too high, which makes a certain component in the material vaporize or decompose.
Solution: Increase the mold temperature or extend the holding time to reduce the mold temperature.
2. Lack of material
Causes: Incomplete molding and curing, high mold temperature, gasification or decomposition of certain components in the material, too slow or too fast operation.
Solution: Adjust the mold fit tolerance and overflow hole size, and adjust the appropriate mold clamping temperature and pressurization time.
3. Burnt
Cause: air is trapped in bad materials, and the temperature rises after compression, causing the resin to decompose.
Solution: adopt effective deflation operation, prolong the closing time of the mold, and reduce the mold temperature appropriately.
4. Warping
Causes: Incomplete curing, improper mold release process, and large material shrinkage.
Solution: Improve the curing conditions, redesign the mold, and make the ejection device reasonable. Try to release the mold after cooling evenly.
5. Matte surface
Causes: too high or too low mold temperature, sticky mold, rough surface of mold.
Solution: Adjust the mold temperature, generally reduce the mold temperature appropriately, use a suitable mold release agent, and improve the surface finish of the mold.
6. Pinhole
Causes: Insufficient material thickening, too high local fiber content, surface air fails to escape, and insufficient material volume.
Solution: increase the thickening degree of the material, improve the uniformity of the material, reduce the feeding area, increase the molding pressure, and increase the amount of material used.