Reasons for Dimensional Offset in Silicone Products

The main influencing factors of silicone deformation: molding time, vulcanization temperature, pressure. The silicone material is soft. If the time is not well controlled after being heated at high temperature, it will become brittle and soft. If the above aspects can be controlled well, silicone accessories can basically solve the problem. In addition to the deformation problem, there is another phenomenon that is the comparison of the elongation and shrinkage ratio of silica gel. Silicone products need to add a certain shrinkage ratio after processing according to the drawings, so the shrinkage ratio of products with different hardness has a certain ratio, and the size deviation and deformation phenomenon of silicone accessories can be calculated from the size of the product. Rates are then compared, so in general, many mold manufacturers need to calculate and then open the mold when opening the mold, so as not to cause product deviation.

The normal shrinkage ratio of silica gel:
20 degree raw material 1.035-1.04
30 degree raw material 1.032-1.034
40 degree raw material 1.03-1.032
50 degree raw material 1.025-1.03
60 degree raw material 1.025-1.028
70 degree raw material 1.02-1.024
80 degree raw material 1.018-1.02