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Rapid production of silicone mold prototype is one of the ways of prototype processing. The reason why it is different from other prototype is that the processing cycle is short, the amount of processing is relatively large and the cost is low. Other processing methods to do hundreds of hand, not only the long processing cycle and processing costs are quite expensive. Usually, CNC processing requires several hundred yuan of hand plate, using a silicone-coated way to do, only a few dozen yuan can be. So in the process of processing, what problems will be encountered?
During the processing of silicone mold prototype, bubbles and shrinkage often occur. When the molding temperature of silica gel mold is too high, the surface silica gel material has begun to take shape in the process of mold closing and pressure. At this time, the air is trapped inside and difficult to discharge, so forming bubbles will occur. For this reason, just reduce the molding temperature appropriately.
Shrinkage is mainly due to the impact of thermal expansion and cold contraction. In the process of molding, silica gel is injected into the mold with a high temperature. However, when the silica gel liquid cools, the volume will shrink. Therefore, if the silica gel hand plate model wants to be the same size as the drawing, it needs to be slightly larger when opening the mold
Therefore, in the process of processing, the silica gel hand plate model will encounter the situation of bubbles and shrinkage. I hope it can be helpful to you.