The solution is:  if small amount, use needles to pick out and clean them, if large area, wash with a washing liquid. The main reason of this problem is lack of sulfur, a small amount of accumulated glue after the lack of sulfur is not cleaned, glue and then rubber, It has more and more material so that the mold can not be produced. In addition, the more the spray release agent is sprayed, the more the organic silicon is accumulated in the mold, and the sticking mold is more serious. The solution is to wash the mold.

Third, the material formula problem
The first is the difference in the thermal tear strength of the material itself. When the mold is rough, it is easy to break the small particles of the material into the mold, and the more the product, the more the mold is formed. The solution is to use some natural material and the like. The material with high heat tear strength, then cleans the mold.
The other is that the formulation itself is too viscous and easy to stick, and the solution is to add an internal molding agent or an external release agent. However, it is not recommended to use a release agent, because any release agent will accumulate silicon, and too much silicon will stick to the mold. The mold for spraying the release agent must be electrically exchanged, otherwise it will stick to the mold after washing the mold, and it will still hurt the mold and affect the life time.