Silicone mold is a simple tool in the rapid mold, the prototype is usually used to mold complex, but the life is very short, only about 20. It has a very good flexibility and replication performance, with silicone rubber replication mold will not affect the dimensional accuracy, a good segmentation, do not have points on the mold, can be directly cast. And then cut along the predetermined parting line to remove the master mold on it. The following are the same as the "
Room temperature vulcanized silicone rubber is divided into two types of addition and condensation.
Using a dedicated silicone rubber mold, the strains sold in double packaging, A group is a compound, B group is a catalyst. Preparation to consider the room temperature, mold strength and hardness, in order to determine the AB group weight preparation ratio. At room temperature at 20-25 degrees, A: B = 100: 1.5. When the chamber is low, the B component is suitably increased by 0.1-0.3 parts. Room temperature is high to reduce the B group 0.1-0.3 copies. The specific method is based on the silica gel mold volume to determine the total amount, and then A, B components in proportion to accurately measure, placed in the vessel evenly stir.
Molded: the deployment of good materials, into the imitation of the clean kind can be. In order to save material, made thin silicone products die, can also be brushing brush. To increase the tension of the mold can be glued gauze and the like. At room temperature of 20 degrees under 2 hours can be turned into elastomer, one day after use.