liquid rtv-2 silicon rubber for PU craft mold making

1) Applications of liquid Silicone rubber for mold making

 Silicon rubber for molding making is primarily intended for poly resin crafts, PU crafts, PU     resin crafts ,gypsum crafts, unsaturated resin crafts, lighting and candles crafts ,plastic toy , stationery gifts crafts industry, a large statue Buddha, relievo furniture, furniture decorative materials, statues Buddha, artifacts copied, building decoration materials, large-scale cement mold, artificial fossils Factory, Europe component factory, simulation landscapes, animals and plants sculpture, sandstone crafts and so on.

2)  Features description of liquid Silicone rubber for mold making

Silicon rubber for mold making is white or red flowing liquid with general hardness of 22-50A°after curing. Molding silicon rubber is a kind elastic silicon rubber mold which features with resistance to deformation, high-temperature, acid-alkali and expansion as well as high reproduction times, good tensile strength, tear strength and elongation. Silicone rubber (HY-638) is the most suitable for small products or fine and precision products which is difficult to demould. This silicone rubber is one of the products with the highest use level in the production of craftwork gifts and the shrinkage less than 0.2%.

3) Operations of liquid Silicone rubber for mold making

 silicone rubber is composed of two components. Component A is white flowing liquid while component B is the curing agent.

Steps:

   a. take silicone rubber of 100g and add 2% curing agent for  mixing evenly.

   b. After the silicone rubber and the curing agent are completely mixed, put the silicon into a vacuum machine for deairing to remove the bubbles.

   c. After deaired, pouring the liquid silicone rubber into the product to be duplicated or into the mold frame.

Note1: silicone rubber is used for pouring or brushing technique. That is to say,

firstly fix the product or sole model to be duplicated onto a plane plate,

then enclose the plane frame with wooden plates to prevent the leakage of the silicon rubber,

thirdly mix the silicone rubber and the curing agent evenly according to the mixing ratio of 100 : 2 and pour them onto the sole model,

at last  brush evenly with a wooden plate or a brush, and fill up the mold frame with gypsum after the silicone rubber is dried.

Note 2: 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 demold, less curing agent is needed.

Note3: 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.

 4) Frequently asked questions of liquid molding silicone rubber

Why does the silicone rubber mold have few molding times?

      The silicone rubber mold has few molding times is due to following 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. 

5) Storage and Precautions of liquid  silicone rubber

silicone rubber, which is an environmentally-friendly liquid silicone product, is not easy to burn and can be stored and transported as non-hazardous goods. The shelf life of the product is about one year from the date of production. Inspection is required when exceeding the time limited. It can continue to be used in case of neither thickening nor deterioration.

Friendly remind:

We are manufacturer specializing in all kinds of silicone rubber, our products are high quality with competitive price; also we can help our customers solve any technical problems of silicone rubber.

Any questions of silicone rubber for mold making, please feel free to contact Kaimi:

FAX: 086-755-89948030

MOBILE:086-18938867528

Website:  www(dot)szrl(dot)net

E-MAIL: hyju(at)szrl(dot)net

skype:hyjiangying