At Newtop Custom Silicone, we specialize in Liquid Silicone Rubber (LSR) injection molding, a cutting-edge manufacturing process that enables high-precision, high-volume production of custom silicone components across industries such as automotive, medical, electronics, and baby care.
What Is LSR Injection Molding?
LSR injection molding is a fully automated, closed-loop process that utilizes two-part platinum-cured liquid silicone. The material is pumped into a mixing unit and injected into a heated mold cavity under high pressure. Once cured, the molded part is ejected, and the cycle repeats—allowing for consistent, flash-free production with minimal human intervention.
This process is ideal for producing complex parts with tight tolerances, excellent biocompatibility, and resistance to extreme temperatures, chemicals, and aging. It’s especially suitable for applications requiring high transparency, flexibility, and hygienic standards.
Real-World Application: Overmolded Medical Sealing Valve
A recent success story from our workshop highlights the power of LSR injection molding. A European medical device manufacturer needed a custom overmolded valve that combined a rigid plastic base with a soft silicone sealing structure.
Our engineering team developed a two-shot LSR overmolding solution, ensuring complete bond integrity between the plastic and silicone layers. The result was a leak-proof, durable, and biocompatible component that passed rigorous ISO 10993 testing and is now used in tens of thousands of medical devices worldwide.
Why Choose Newtop for LSR Molding?
In-house tooling & prototyping: From mold design to mass production.
Advanced vertical injection machines (85T to 160T) for LSR.
ISO 9001 & ISO 13485 certified: Reliable quality for demanding markets.
Fast turnaround for both prototypes and large-scale batches.
At Newtop, we don’t just manufacture parts—we solve problems. Our team partners with clients from concept through delivery to optimize material performance, reduce costs, and accelerate product launch timelines.
