1. Properties of Liquid Silicone

  Liquid silicone is a non-toxic, heat-resistant, high-recovery flexible thermosetting material. Its rheological behavior is mainly characterized by low viscosity, rapid curing, shear thinning and high thermal expansion coefficient.

   LSR is a dual-liquid rapid vulcanization material with platinum as a catalyst, which can be produced by injection molding, mass, rapid vulcanization, and repetitive mechanical production. Its products show good thermal stability, cold resistance, excellent electrical insulation properties, and no toxic substances are produced when burning. Therefore, it has become an irreplaceable material in the production design of health products, automobiles, baby products, medical products, diving products, kitchen utensils and seals.

2. Molding Process

LSR is a two-component liquid material, which is divided into A component and B component. The work of the mixer will fully mix the A component and the B component in a precise 1:1 ratio. And because some products are colored designs, they are equipped with color

Color pump group and color metering part. A+B components, additives, colors, etc. are fully mixed and then enter 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, and the silica gel undergoes a curing reaction at a mold temperature of 145-200 °C. When using a cold runner system, it is important to note that the runner must be sufficiently cold. In order to avoid glue leakage, the needle valve is installed on the surface of the mold part. When the glue injection is completed, the needle valve immediately closes the nozzle.