How to make mold with Tin cure silicone ?
Step 1: prepare the original molds Make sure your original molds perfect, use release agent if needed. Fix the original mold on a board, find suitable size frame for the original mold. ( normally 1 cm frame space ).
Step 2: Take 100 G parts A and add 2G parts B and mix them evenly. Notes: Mold making silicon rubber is a kind of flowing liquid, It contains two parts. Part A is a kind of flowing white liquid and part B is the curing agent or catalyst .Please follow the step strictly:
1.Weigh the two part exactly by electronic weight.. If not, for example add two much catalyst, the operation time will be too fast and not able to operate, which will cause inconvinience to operate .
2.Mix part A and part B evenly.
If not mix well, the silicon rubber will be partly solidified, then the mold will be not able to use.
Step 3: Pouring casting or Brush operation Notes:
1. For simple pattern products we suggest use pouring operation way, which will be very easy to operate and demould.
Pourable silicone require light viscosity which will be easy to flow smoothly and easy to de-air.
2.For delicate pattern products we suggest use brushing operation way, which can copy the pattern exactly. Brushable silicone require high viscosity which won't be easy to flow away and easy to brush .
3. We suggest, to set the silicone mold for another 12 hours after demold before put into large production.