CONDENSATION CURE RTV-2 MOLDMAKING SILICONE

1. Introduction of Liquid silicone rubber for plate engrave mould making :

Liquid silicone rubber for plate engrave mould making  is a kind of liquid fluid, features good fluidity and good operation., large duplication times.

 2. Features of Liquid silicone rubber for plate engrave mould making :

a. Good characteristics of easy-operation

b. Ligh viscosity and good flowability

c. Low shrinkage

d. Favorable tension

e. No deformation

f. High temperature resistance, acid and alkali-resistance and ageing resistance

3. Operations of Liquid silicone rubber for plate engrave mould making :

Step One: Take 100g of part A and add 2g of part B and mix the silicone rubber and curing agent evenly

Step Two: vacuum pumping

Without exception, this step takes less than 10 minutes. Otherwise, it will cause , and no more further steps will be available 

Step Three: Perfusion Molding

The perfusion molding is an easy way to make molds, it’s Slowly and evenly perfuse the mixed silicon rubber into the square frame. After the cross linking reaction

4. Operations for the external mold of  Liquid silicone rubber for plate engrave mould making :

a. Make a square frame with four pieces of wooden boards or rubber plates, then place the product which is covered with the finished silicon rubber mould in the middle.

b. Slowly and evenly perfuse the gypsum into the square frame. Also you can brush the resin on the product which is covered with the finished silicon rubber mould with a brush or a brush pen. Repeat this process two or three time after the cross link reaction.

5. 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 silicon rubber when making molds. In fact, it might have just the opposite effect. The tension and the tear strength will be reduced badly with the addition of silicon oil. And the silicon molds will be in a weak and flimsy manner.