Capabilities
UPCOA is an industry leader in manufacturing Liquid Silicone Rubber (LSR) for medical, high-end electronics and military applications. UPCOA is ISO-9001-2000 certified by TUV registrar. UPCOA offers product design support and pro-actively works with its customer to design the product for manufacturability and cost-effective production. The essence of our enduring relationships with customers is open and honest, people-based service. We offer the latest manufacturing techniques with small company
responsiveness.
Our customers enjoy working with us, year after year, project after project.
Liquid Injection Molding
Liquid Injection Molding (LIM) of Liquid Silicone Rubber is a rapid and economical process for low to high-volume applications that produces final parts with excellent precision and repeatability.
Liquid silicone is a low viscosity (0.1mil cps to 2 mil cps) liquid at room temperature, the injection barrel is cooled, and the injection mold is heated.
A two-component LSR mix-a catalyst containing platinum and cross linker-plus, if required, color pigments and additives, are dispensed into the LIM machine barrel after the mix is homogenized through a static mixer. The homogenized mix is then injected into a heated mold. The LSR mix is vulcanized (cured) in seconds. Benefits of LIM are:
- Closed process lowers the risk of contamination
- Quick cure resulting in a faster cycle compared to peroxide cured cycles
- Easy to color and flexibility with changes in pigment ratios
- Low maintenance and ease of change-over
- Common screw/barrel assembly for all LSR grades as no material shear is necessary
