silicon rubber for mold making

Mould making silicon rubber Applications of mould making silicon rubber Silicon rubber for mould making is mainly used for poly resin crafts, gypsum crafts, unsaturated resin crafts, lighting and candle crafts, plastic toys, stationary gifts crafts industry, a large statue Buddha, large-scale cement mold, aninamls and plants sculpture, relievo furniture, cultural relic product, etc.

Features of molding silicon rubber

Silicon rubber for mold making with general hardness of 22-55 A0 after curing. Molding silicon rubber is a kind of flowing liquid which features with good resistance to deformation, good tensile and tear strength, acid-alkali as well as high reproduction times, good flowability and easy operation.

Product performance parameter of silicon rubber

Model:628

color:white

Viscosit y(cps):24000-29000

Hardness(A0):28±2

Tensil e-strength (Mpa):≥3.6

Tear-strength (KN/m):≥2.7

Elongation(%):≥420

Mixing Ratio (%):2~3

Pot life(H):0.5~1

Demould Time(H):2~5

Instruction for molding silicon rubber

If customer wants to make large products and large size molds, the mold should be made of silicon rubber with high hardness. On the contrary, if the mold with dedicate and precision patterns, it should make of silicon rubber with low hardness. The mixing ratio between the silicon rubber and the curing agent depents on the customers’ requirement.

If clients needs fast drying and demold, more curing agent will be added; contrarily, if molds requiring slower drying and demould, less curing agent is needed.

(Note: our company does not recommend you to add silicon oil, if a special soft silicon mold or fine or dedicate pattern products are required, 5%-10% silicon oil can be added to soften the mold for easy demould) Frequently asked questions of mold making silicon rubber

1. Why should the silicone mold be reused only for a few times?

It can be due to the following reasons

a. Adding too much silicone oil in to silicon rubber. Silicon oil is an additive which destroies the molecular weight of silicone rubber and reduce the tension and tear strength.

b. Using the silicon rubber with a high hardness to make molds for small sized products with delicate and intricate designs and the silicon rubber with a low hardness to makes molds for large sized products with simple designs.

(Notes: we should choose the silicon rubber specifically according to the requirements of our products to avoid this problem.)

2. Why is the appearance of the finished mold striate and unsmooth?

It is because the appearance of the product or the model itself is not perfect, and it has not been polished before the further operation. So when you make silicon molds, firstly you should polish the product, spray the mold spray evenly on the product. In this case, the problem can be avoided.

Payment Terms:L/C, T/T

Port: Shenzhen

Minimum order quantity:200kg

Supply ability:4 tons/day

Deliverly Time:within 3 days after getting bank receipt

Package:25kg/drum and 200kg/drum

www (dot) szrl (dot) net

hyw(at)szrl(dot)net

Helenliao888(at)hotmail(dot)com

0086 15889404068