Liquid silicone, divided into glue A and glue B, using A quantitative device to control the ratio of 1:1, and then through the static mixer to be fully mixed, injected into the injection tube and then the injection molding production.The liquid silicone is injected into the hot runner mold to produce silicone products, which can achieve the advantages of one-time molding, no waste and automation.
Characteristics of liquid silicone:
Liquid silicone is a non-toxic, heat-resistant, and high-resilience flexible thermosetting material. Its rheological behavior is mainly manifested by low viscosity, fast curing, shear thinning, and high thermal expansion coefficient. It is a two-liquid rapid vulcanization material with platinum as a catalyst. It can be produced by injection molding, mass, rapid vulcanization, and repetitive mechanical production. Its products are characterized by good thermal stability, cold resistance, excellent electrical insulation properties, and no toxic substances are produced during combustion.
Therefore, it has become an irreplaceable material in the production design of health products, automobiles, baby products, medical products, diving products, kitchen appliances, and seals.
Liquid silicone molding process:
LSR is a two-component liquid material, divided into A component and B component. The work of the mixer fully mixes the A component and the B component in a precise ratio of 1:1. Also, because some products are of colored design, it is equipped with a color pump set and a color measurement part. A+B components, additives, colors, etc. enter the plasticizing system after fully mixed.
The 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 170-200°C. When using a cold runner system, it is worth noting that the runner should be cold enough. In order to avoid glue leakage, the needle valve is installed on the surface of the mold part. When the glue is injected, the needle valve immediately closes the nozzle.
