After the mixing of the silicone rubber compound, the parking time should not be less than 24h, so that various compounding agents (especially structure control agents) can fully function with the raw rubber. After parking, the rubber hardens and the plasticity value decreases. It must be re-melted before use. The remelting uses an open mill. At the beginning, the roll distance is large (3 ~ 5mm). At this time, the rubber is hard, the surface is wrinkled, and it is wrapped on the front roll. With the extension of the refining time, the rubber gradually softens; the roll distance is gradually reduced (0.25 ~ 0.5mm), and the rubber is quickly wrapped on the back roll. After the rubber material is softened and the surface is smooth and flat, the film can be cut out. Insufficient re-refining, wrinkles on the film surface; excessive re-refining, the rubber will be sticky and sticky. The remelting temperature is generally controlled at room temperature.