Microbubble Control During Epoxy Resin Insulator Casting

Air often enters during the mixing and pouring of high voltage standoff insulators castable, which can cause bubbles to form. These voids can affect the material's density and cause changes in internal stress, thus impacting the stability of electrical insulation.

Raw material pretreatment and environmental condition control are crucial for microbubble control. For high voltage epoxy, degassing of the material and curing agent, and controlling the mixing temperature to match mold conditions, reduces gas release and voids caused by thermal expansion and contraction. Some processes utilize vacuum casting equipment for the sealed pouring of epoxy resin insulator, allowing residual gas to escape from the liquid system and improving filling uniformity.