Liquid Silicone Rubber Molding
Our liquid silicone rubber molding process produces custom prototypes and end-use production parts in 15 days or less. We use aluminum molds that offer cost-efficient tooling and accelerated manufacturing cycles, and stock various grades and durometers of LSR materials.
How Does Liquid Silicone Rubber Molding Work?
Due to the flexible nature of LSR, parts are manually removed from the mold, and thus, ejector pins are not built into the mold design. Like a standard aluminum tool, an LSR molding tool is fabricated using CNC machining to create a high-temperature tool built to withstand the LSR molding process. After milling, the tool is polished by hand to customer specifications, which allows six standard surface finish options.
The finished tool is loaded into an advanced LSR-specific injection molding press that is precision geared for accurate control of shot size to produce the most consistent LSR parts. Since LSR is a thermosetting polymer, its molded state is permanent—once it is set, it can’t be melted again like a thermoplastic. When the run is complete, parts (or the initial sample run) are boxed and shipped shortly thereafter.
- 25 to 10,000+
- Shipped in as fast as 1 day
- Molds starting at $1,995
See how the properties and characteristics of liquid silicone rubber and thermoplastic elastomer materials compare.
Consider part quantities, lifetime maintenance, level of inspection, and cost when determining which option is right for injection molding.