What is Liquid Silicone Rubber Injection Molding?
Liquid Silicone Rubber (LSR) injection molding is a manufacturing process used to produce flexible and durable parts made from silicone rubber. The process involves mixing two-part liquid silicone rubber pumped into a high-pressure injection molding machine. Then the machine injects the liquid silicone rubber into a mold cavity, and we cure and harden it to form the finished product. Liquid silicone rubber injection molding provides high-volume production, consistent part quality, and improved productivity. A low compression set and the ability to resist extreme temperatures make liquid silicone rubber durable and ideal for demanding applications. How Does LSR Injection Molding Process Work? 1.LSR Mold Design The process begins with the design of a molding tool, which is typically made of steel or aluminum. The mold design can be polished to meet different finish options to form the desired shape of the silicone part. 2.Prepare Material Usually the liquid silicone rubber is divided into two components, one containing a catalyst and the other containing a base-forming material. Both two materials are pumped through a static mixer by a metering pump. The two groups of silicone A and B are cured according to a specific ratio, usually at a ratio of 1:1.
3. Inject the Material into Mold
The liquid silicone rubber is heated to a high temperature to transform it from a liquid state into a viscous, flowable state. The heated and liquefied silicone rubber is injected into the mold cavity under high pressure. After filling the mold cavities, the material takes the shape of the molds. The mold is closed securely during this process to prevent any material leakage.
4. Curing and Solidification
After filling the mold cavity, it is heated to begin the curing process. This process causes the liquid silicone rubber substance into a solid silicone rubber part and take the shape of the mold. The size and complexity of the parts or products determine the curing time.
5. Cooling and Removal
After Curing, the LSR products have undergone sufficient cooling, they should be removed and separated from the molds.
6.Trimming and Finishing
The removal part may undergo additional processes such as trimming or finishing to remove any excess material or imperfections. This step ensures that the final product meets the required specifications. LSR injection molding is widely used in industries such as medical, automotive, electronics, and consumer goods to produce a variety of products, including seals, gaskets, medical devices, and electronic components. Are you looking for a reliable supplier to provide high-quality silicone rubber mold for your projects? Lingshantech choose the first-class LSR injection machining equipment in the world, cooperated with many-sided tooling manufacturing technology, can achieve micron-level in tool manufacturing, and it perfectly achieved required precision for LSR tool. Welcome to contact us and get an instant quote.
