Mold silicone rubber when making silicone rubber mold, it is necessary to mix and stir the liquid mold silicone rubber and curing agent / catalyst according to a certain proportion. These three steps are essential links and are also a major factor in the uneven curing of mold silicone rubber.

1. The ratio of mold silicone rubber to curing agent is abnormal. If the ratio is estimated or based on feeling, it will lead to wrong ratio. If the amount of curing agent is small, it will not only lead to slow curing of mold silicone rubber, but also uneven curing in serious cases.

2. During the mixing process after the mold silicone rubber is mixed with the curing agent, the uneven and insufficient mixing will also lead to the uneven curing of the mold silicone rubber. Especially during the mixing, the bottom and upper wall of the container are most likely to be ignored, and this part of the liquid should be hung down for mixing. Also, the mixing time should not be too short.

Liquid silicone rubber stirring

3. Uneven curing of silicone rubber in addition mold is a common problem, which mainly lies in the operation link. For example, the mold opener has smoking behavior during operation, and the smoke contains substances, which leads to non curing of silicone rubber in addition mold. Addition mold silicone rubber is sensitive to water, nitrogen, phosphorus, sulfur, organotin or heavy metal elements. Once these elements are in contact, uneven curing will occur.

The above three situations will lead to uneven curing of mold silicone rubber, and finally lead to mold scrapping, which is a waste of time and materials. In order to avoid non curing, pay attention to the details as much as possible when operating the mold silicone rubber for mold opening