Garden Statue Mold Making Silicone Rubber

Mold making silicone rubber applications

mold making silicone rubber will reproduce the finest detail and is suitable for a variety of industrial and art related applications including prototypes, furniture, sculpture and architectural elements. mold making silicone rubber can also be used to cast a variety of materials including wax, gypsum, low melt alloys/metals and urethane, epoxy or polyester resins (without using a release agent).

Features of mold making silicone rubber

Good characteristics of easy-operation
Light viscosity and good flowability
Low shrinkage
Favorable tension
No deformation
Favorable hardness
High temperature resistance, acid and alkali-resistance and ageing resistance

Operation instructions for making a mold by mold making silicone rubber

Correct mixing ratio
Component A is silicone rubber, and component B is curing agent or vulcanizing agent. Usually the mixing ratio will be 2-3%, e.g. to 100g silicone rubber should be added 2g catalyst and then mix them thoroughly. (Note: the weight of the silicone and catalyst should be weighed correctly). The following table gives suggested proportions at various temperatures:

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Preparation of the original molds
Because mold making silicone rubber reproduces the surface texture of the original model exactly, the surface of the original to be molded must be finished: all faults must be removed, and it must be sanded or polished to the desired smoothness. If a smooth finish on the final casting is desired, the original must be polished. For a matte finish, polishing is not necessary.

Vacuum-pumping process

To mix the silicone and catalyst with a standard mixing ratio and then do the process of Vacuum-Pumping. Bubbles will come out during the mixing of the silicone and hardener, if without Vacuum-Pumping, the bubbles cannot be released from the mixture, as a result, there will be many bubbles in the finished silicone mold. Then the mold has a less tensile strength which will affect the reproduction times. Such an unsmoothed silicone mold will affect the quality of the production directly.

Advantages
 Mold making silicone rubber has the best release properties of all the mold rubbers, which is especially an advantage when doing production casting of resins (polyurethanes, polyesters and epoxy). No release agent is required, so there is no post-production cleanup. Silicones also exhibit very good chemical resistance and high temperature resistance (400°F / 205°C and higher). High temperature resistance makes silicone the only mold rubber suitable for casting low melt metal alloys (e.g. tin, pewter, lead). The combination of good release properties, chemical resistance and heat resistance makes silicone the best choice for production casting of resins.

Any questions of Silicone Rubber, please feel free to contact Miss Leah:

TEL: 086-755-89212382

FAX: 086-755-89948030

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