The manufacturing processes for silicone parts primarily encompass three methods: compression molding, injection molding, and Liquid Silicone Rubber (LSR) molding. Compression molding is typically employed for the mass production of small to medium-sized silicone parts; it is a simple process wherein raw silicone material is shaped into the desired form through heat-induced vulcanization, making it suitable for products with relatively simple structures or substantial wall thicknesses. While the cost of compression molding is relatively low, its production efficiency and capacity for handling complex designs are limited.
Injection molding is well-suited for silicone parts featuring complex structures and requiring high precision. Under conditions of elevated heat and pressure, silicone is injected into a mold cavity, where it undergoes vulcanization and curing to form the final product. This process enables the production of silicone parts with high dimensional accuracy, superior surface finishes, and intricate geometries; it is ideal for large-scale mass production and can be integrated with multi-color or dual-color molding technologies.
Liquid Silicone Rubber (LSR) molding utilizes a two-component silicone system that is mixed and injected into a mold, where it undergoes rapid vulcanization and curing. This method is characterized by high production efficiency and facilitates automated, continuous manufacturing operations. The LSR process is particularly well-suited for silicone parts in sectors such as medical devices and food processing, where stringent requirements for hygiene and precision are paramount; furthermore, it enables the high-precision fabrication of thin-walled components, micro-structured parts, and products with highly complex geometries.
