Forming process of liquid silicone
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LSR is a two-component liquid material, which is divided into A component and B component. The work of the mixer fully mixes A component and B component in a precise 1: 1 ratio. Because some products are colored, they are equipped with a color pump set and a color measuring section. The A + B components, additives, and colors are fully mixed into the plasticizing system.
This plasticizing screw has the functions of homogenization and mixing at the same time. The mixture is injected into the hot mold through the screw. At the mold temperature of 170-200 ° C, the silica gel undergoes a curing reaction. When using a cold runner system, it is important to note that the runners must be cold enough. In order to avoid glue leakage, the needle valve is installed on the surface of the mold part. When the injection is completed, the needle valve immediately closes the nozzle.