Why Smooth-On mold rubber?
Rubber molds can be made quickly and will accomodate the expansion of water during the freezing process. Some wax or foam processes involve using metal molds, which are expensive and rigid. Rubber is cheaper and flexible. The flexibility allows for removal of ice patterns with complicated shapes and negative draft. Smooth-On rubber products are dimensionally stable and can be exposed to extreme cold temperatures with no affect. Freeze Cast Engineering exposed their Smooth-On silicone molds to -140° F / -60 ° C with no apparent shrinkage or expansion. Freezecast Engineering has a patent on the process and offers engineering and consulting services to set up a Freezecasting Operation. Their clientele list thus far includes branches of the US Military, General Motors and Ford Motor Co. The process has received endorsements from such notable organizations as The Investment Casting Institute and The Society of Automotive Engineers. Freeze Cast Engineering Co. of Worcester, MA developed “The
