ProtoCAM: Additive Manufacturing, 3D Printing and Rapid Prototyping.

Urethane Castings

In urethane casting a liquid material is poured into a mold containing a hollow cavity in the shape of the part, then allowed to solidify. The technique allows for the creation of small quantities of production-ready parts without the added expense of machine tooling.

Our Casting Work

About Urethane Castings

Urethane casting (or polyurethane casting) is ideal to rapid prototype short-run production of pieces made from a plastic injection molded resin. Often performed after an RTV mold (also called a room temperature vulcanization mold) is made from a stereolithography (SLA) prototype, urethane casting is a cost-effective way to reproduce production-ready parts in small quantities.

After a mold is created, urethane casting material – synonymous with polyurethane casting material – is injected into the mold’s “void.” This allows for near-perfect copies of the original prototype to be created. We have low durometer urethanes that can be very soft, but we can also make stereolithography molds and inject silicone rubber into it.

Watch a video discussing urethane castings:

Urethane casting provides:

  • Accuracy: A high degree of accuracy is maintained in the copy – including surface finish.
  • Versatility: Parts without draft, or with undercuts, can be reproduced. Likewise, different materials can be used with the same mold, making it possible to test designs with a variety of material properties.
  • Speed: Several parts can be created per shift once the mold is complete.

Typical Casting Use Cases

Small-batch manufacturing Engineering design verification Alpha and beta builds
Pre-production parts Functional prototypes