Gypsum centre mould made from RTV Silicone rubber

The infomration just for reference,need more information about RTV silicone rubber for mold making,please feel free to contact with Miss Alice at the number of 0086-755-89948013 and the mobile 0086-13510188049. Welcome to visit  www(dot)szrl(dot)net anytime .

       The silicone rubber mold has few molding times is due to follwoing reasons: adding too much silicone oil which will destroy the molecular of silicone rubber; making the mold for small and fine detailed products with higher hardness silicone rubber which is easy to break; making the mold for large products with soft silicone rubber which will reduce the tensile and tear strength of the mold, and the mold will have deformation. Thus, we should take the proper silicone rubber to make the mold for suitable products. 

Why does the silicone rubber mold have few molding times?

Frequently asked questions of RTV silicone rubber

Tear Strength (kgf/)

Tensile Strength (kgf/c)

RTV Silicone rubber for mould making standard datasheet:

(Note: our company does not recommend you to add silicone oil. If a special soft silicon mold or fine detailed and complex patterns products are required, 5%-10% silicone oil can be added to soften the mold for easy demould.)

If the 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 fine and precision  patterns, it should be made of silicon with low hardness. The amount of the curing agent depends on the actual requirements of the customer. If molds requiring fast drying and demould, more curing agent is needed; contrarily, if molds requiring slower drying and demould, less curing agent is needed.

RTV Silicon rubber for mold making operations

Silicon rubber for mold making is white or red flowing liquid with general hardness of 22-50A

Silicone features:1) Low linear shrinkage 2)Good operation 3) High tear and tensile strength 4 )Curing agent free 5)Easy de-mold