Hong Ye Silicon RTV food grade liquid silicon rubber to make mold

Hong Ye Silicon RTV food grade liquid silicon rubber to make mold

The question about mould making liquid silicone rubber

1.why does the silicone mold get burnt out?

this consequence happens only because you have left out the important notes when using unsaturated resin materials to produce your products,the unsaturated resin produces great heat when added the curing agent.so you must demould the product within 3 minutes to avoid this problem.

2.why does the silicone mold appear to be dry outside but web inside?

because molding silicone rubber is a kind of condensation silicone rubber,which get solidified after absorbing moisture from the air,in order to provide a significant shelf-life for the silicone rubber ,we will dry our the water in the silicone rubber,

solution:add 0.05% water into the silicone rubber and stir ove a low speed briefly when you use it.

3.why is the tear strength of the silicone mold weak?

in order to reduce the viscosity of silicone rubber and pursue a good quality,you may add a lot of silicone oil into the silicone rubber when making molds.in fact,it might have just the opposite effect,the tension and the tear stength will be reduced badly with the addition of silicone oil.and the silicone molds will be in a wak and flimsy manner.