plaster mold castingWhat is Plaster MOLD Casting?
Plaster Mold Casting and its benefits
Learn More About Plaster Mold Casting and Why it Might be a Great Option for Your Next Project
What is Plaster Mold Casting?
Plaster mold casting also referred to as rubber plaster molding (RPM) is a method of pouring liquid metal into plaster molds which will produce aluminum or zinc castings.
Plaster Mold Casting works much like other castings processes where a heated liquid material is poured into a mold that contains a hollow cavity of the desired shape. This is then allowed to solidify. The solidified part is known as a casting.
Once it has molded and cooled the cast is broken out of the mold to complete the process.
Have questions? Ask the metal casting experts
Good To Know!
Precise Cast offers Sand Mold Castings and CNC machining as well. Learn more about these production processes for your next project.
Sand Mold Castings
Benefits of Plaster Mold Castings
- The tooling process is much quicker than permanent mold or die casting tooling processes.
- Typical first article lead time is 1-2 weeks (expedited lead times are available)
- Tooling costs are lower than permanent mold and die casting tools
- Prototype to low-volume-production quantities is possible.
- Cost-effective manufacturing/prototyping solution for quantities of 5-1,000 EAU
- For quantities under 5, our in-house CNC machining department could also be a good fit
- Smooth surface finish – typical as-cast surface roughness of Ra 63 µinch (Ra 16 µm) – very comparable to a die-cast process surface finish.
- Exceptional part detail is possible – this process can capture detail as fine as a fingerprint in the metal casting.
Plaster Mold Castings Capabilites
- Thin wall capabilities
- The typical wall thickness of .080″- .100”
- Capable of casting as thin as .030” (.75mm) wall thickness (depending on geometry)
- Parts requiring cores (both simple and complex) are easily done. Many investment cast parts can be manufactured using the plaster casting process
- Simple and very complex parts are achievable
- Capable of manufacturing zero draft geometries (a minimum draft angle of 1-2 degrees is preferred)
- Ability to accurately simulate mechanical, thermal, and corrosion properties typically associated with a die cast process