Molding Silicone Rubber for Casting of Cultured Stone

Applications of Molding Silicone Rubber for Casting of Cultured Stone  

Manual mold silicone rubber is mainly applied for manual mold design, PVC plastic mould, cement product mold, low melting-point alloy mould, alloy toy crafts, plastic toy, craftwork, gift and stationery, big statue, cultural relic duplication,pad printing orientation, electronic appliances vibration resistance, etc.

Features of Molding Silicone Rubber for Casting of Cultured Stone 

Low shrinkage, no deformation, good elasticity, high duplication times, etc.

Operation Instruction for Molding Silicone Rubber for Casting of Cultured Stone:

(1)  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%. Such as to 100G silicone rubber should be added 2G catalyst and then mix them totally(Note: the weight of the silicone and catalyst should be weighted correctly. According to local weather, the mixing ratio can be 100 to 2 under room-temperature 25 ⁰C; if the local weather is about 10 ⁰C, then the maximum mixing ratio should be 5%; When local temperature is -5 ⁰C, no reaction will happen between the silicone and hardener; once the temperature of local weather is 38-45 ⁰C, the mixing ratio of silicone and silicone rubber should be 1 %).

(2) Preparation of the Original molds

Firstly, you should deal carefully with the Original mold or the products you want to be molded. If no polishing of the Original mold or the products you want to be molded, the surface of the original mold or products is not so smooth or perfect, then the products made out of silicone molds will be not up to standard.

(3)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.

FAQs of Molding Silicone Rubber for Casting of Cultured Stone:

 The solutions of the sticky of the silicone mold?

 The main reason for this problem is that you do not handle the products or original molds well, then you should deal with the original mold or products carefully before molding. Such as for the products with a complicated pattern or a unsmoothed surface, you should polish and clean the products after which it will be molded ,then spray the release agent. Normally, the release agent can be Vaseline , detergent. liquid wax Etc. In practical process, you can bush different release agent according to different material.

The second reason is that the operator pour the silicone into the mold when the mixture is mixed evenly, then the finish silicone mold will not cure and dry entirely.

Any questions of Molding Silicone Rubber for Casting of Cultured Stone, please feel free to contact Kaimi:

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