With the liquid silicone being widely used in medical products, baby products, automobile manufacturing, food industry, electronic products, diving supplies, kitchen utensils and seals, it has become an irreplaceable material. The traditional hot pressing and molding process (plastic products, solid silicone) can no longer meet the market needs. The liquid silicone injection process has developed rapidly in recent years, but the information or experience sharing on the Internet about the liquid silicone mold process or injection molding, defect analysis Few and few, most of the content comes from books or related materials. Lack of details, experience and depth, Jutai will discuss with you a series of technical issues in this industry.
Before manufacturing molds, we must first understand what is liquid silicone
Raw material characteristics
Liquid silicone rubber (Liquid Silicone Rubber) is a non-toxic, heat-resistant, highly resilient flexible thermosetting material, its sulfur change behavior is mainly manifested as low viscosity, rapid curing, shear thinning and high coefficient of thermal expansion.
LSR is a dual-liquid rapid vulcanization material that uses platinum as a catalyst. It can be produced by injection, large quantities, rapid vulcanization, and repeatable machinery.
Its products are characterized by good thermal stability, cold resistance, physiological inertia, excellent electrical insulation properties, and no toxic substances during combustion. According to their vulcanization temperature, liquid silicone rubber can be divided into two types: high temperature (heated) vulcanization type and room temperature vulcanization type. High temperature adhesive is mainly used to manufacture various silicone rubber products, while room temperature adhesive is mainly used as an adhesive Use of materials or molds.