Liquid Silicone Rubber (LSR) Mold Manufacturing

Liquid Silicone Rubber, with its low compression set, fast cure cycles, great stability and ability to resist extreme temperatures of heat and cold makes it ideally suitable for the production of parts where high quality is a must. Unlike most thermoplastic elastomers (TPRs and TPEs), LSR remains flexible and elastic down to -70^o F and retains its properties up to 450^o F. In addition to these qualities, the wide range of hardness and colors, silicone elastomers have become the material of choice for an ever increasing amount of applications.

M.R. Mold and Engineering is one of the few companies in the United States offering waste-free LSR molds. Waste-free molds coupled with various types of automation devices, such as M.R. Mold's Cold Runner System, provide our customers with 'lights-out' molding. M.R. Mold's liquid silicone molds offer a high level of productivity and value. Depending on the complexity of the tool, we present our customers with a wide range of automation capabilities. All of our tools are built to SPI standards using only the finest steels and components available.

Historical footnote:
Dumas predicted the existence of silicone rubbers in 1840. However, it was not until 1872, that Ladenburg produced the first example, a very viscous oil, by reacting diethoxydiethysilane with water and trace amounts of acids. The first commercial grades were produced in 1943 by the Dow Chemical Company, with many other companies following shortly after.