Liquid Silicone Rubber Injection Molding design

Thermoset liquid silicone rubber (LSR) liquid injection molding structure is similar to thermoplastic rubber molding structure on the whole, but there is still difference between both of them.
LSR material usually has a lower viscosity, contributing a short time for injection molding, so it is, even under a fairly low injection pressure. A good venting device plays an important role in mould for avoiding air entrapment.
Besides, LSR materials don’t shrink in molding like the thermoplastic rubber do and they usually tend to expand with heat while shrinks slightly with cold. Therefore the liquid silicone rubber products won’t stay in molding convexity as expected but in cavity with larger surface area.   `