How to deal with the uneven foaming holes of the Automotive Wiring Harness Protection Sleeve

The foaming technology of the Automotive Wiring Harness Protection Sleeve is a guarantee for the quality of the Automotive Wiring Harness Protection Sleeve. It is also the foundation for an Automotive Wiring Harness Protection Sleeve factory to gain a foothold. If the foaming technology of the Automotive Wiring Harness Protection Sleeve is not good, the foaming pores will be uneven, which will affect the quality of the product. The following editor will share with you how to deal with the problem of uneven foaming holes in the Automotive Wiring Harness Protection Sleeve?

1. The factors that cause the uneven foaming holes of the Automotive Wiring Harness Protection Sleeve are:
(1) The quality of the foaming agent.
(2) The plasticity of Braided Sleeve is too low.
(3) The mixing temperature is too high, and the blowing agent decomposes early.
(4) The knitting sleeve is parked for too long or the temperature is too high, and part of the foaming agent volatilizes or decomposes.
(5) The vulcanization speed of the Braided Sleeve is too fast.
(6) The pressure is too high, exceeding the internal pressure formed by the gas generated by the foaming agent, resulting in insufficient foaming holes.
(7) The water content of the compounding agent is too high, and air or impurities are mixed in the Braided Sleeve.
2. Processing method
(1) Check the foaming agent, if there is agglomeration, it should be sieved, if the particle is coarse, it should be crushed, fully mixed (or thinned) to make it evenly dispersed.
(2) Check whether the plasticity of the Braided Sleeve meets the standard. If the plasticity is too low, additional kneading should be added to increase the plasticity to facilitate the pores.
(3) Check whether the discharge temperature of the internal mixer is too high, whether the roller temperature is too high, and whether the knitting sleeve is scorched.
(4) Knitted sleeves that have been parked for too long should be reworked for supplementary processing.
(5) Formula adjustment, check whether the critical temperature of the vulcanizing agent is close to the decomposition temperature of the blowing agent, and coordinate with each other so that the vulcanization speed and the foaming speed match.
(6) Adjust the machine pressure.
(7) If the moisture content of the compounding agent is too high, it should be used after drying to remove the air or impurities in the Braided Sleeve and make it fully vulcanized.