What are the steps of liquid silicone rubber injection molding silicone process?
Injection molded silicone, also known as injection molding gel, injection molding silicone, LSR silicone, AB silicone, etc., is a two-component, highly transparent, and high tear resistant liquid silicone rubber. The operation process involves injecting various silicone products into an injection molding machine, hence it is called injection molding silicone.
The following are the main steps involved in the injection molding process of liquid silicone rubber:
1. The uncured liquid silicone begins in two containers, compound A and compound B, which are connected to a pump system. Bucket A contains materials that form alkali, while bucket B contains catalysts. The measuring unit will automatically release two substances and any pigment deposition additives at a constant one-to-one ratio.
2. The molding machine can program and customize the automatic injection molding machine, and set the injection settings to provide the appropriate injection volume for each job. The pressure plate and piston are aligned and the mold is closed, and the temperature, pressure, injection rate, and cycle time are set according to customer requirements.
After the setting is completed, the molding machine heats the mold to the appropriate temperature and applies the appropriate clamping force. The injector, pump, and supply of the mold and machine are coordinated and closed. Then, the injection mechanism pushes the material into the mold and cavity.
The combination of heat and pressure applied to liquid silicone rubber will solidify the material until it solidifies. After the cycle is completed, the mold opens and the parts and burrs can be automatically or manually removed by workers. Then, the mold is closed and the process is repeated.
After removing the product from the mold, the molding process may include edge removal, post curing, inspection, and packaging.