ProtoCAM - Excellence in Rapid Prototyping
ProtoCAM Site SearchProtoCAM Site Map
ProtoCAM HomeRapid Prototyping ServicesApplications for Rapid ProtoypingMaterials Specifications for Rapid PrototypingTechnical Information for Rapid PrototypingAbout ProtoCAMContact ProtoCAM


RotoCAST Molds, Rotational Casting


ProtoCAM's capabilities include RotoCAST molding / rotational casting. ProtoCAM is the first rapid prototyping service bureau to have this rotational casting technology in house, enabling high quality RotoCAST prototypes. RotoCASTING will allow ProtoCAM to create thin wall hollow prototypes such as bottles. Prototypes made using this rotational casting process avoid the time and cost of making tooling that would be required if blow molding was utilized. Based on extensive rotational casting experience, ProtoCAM has developed a proprietary process that achieves maximum clarity for RotoCAST prototypes.

Rotational Casting, RotoCAST Molded Prototypes

3D model of prototype part to be made with rotational castingProtoCAM's Rotational Casting Process

RotoCASTING begins by producing a stereolithography master pattern of the final part. This part is sanded and smoothed to meet the desired finish. Once the master pattern is complete, an RTV mold is created. This silicone rubber mold is placed on the RotoCAST machine and the process begins. Material fills the mold and it is rotated simultaneously in two different axes until the part is complete.

Machine Specs

The RotoCAST machine is capable of molds up to 12" high by 12" in diameter.

3D CAD wireframe model of RotoCast prototype


The RotoCASTING process uses the same urethanes as the RTV molding process. Urethane materials come in a variety of colors and durometers.  A material will be suggested based upon the final production material; ProtoCAM has urethanes that mimic PP, HDPE, ABS, Nylon, PC, Styrene, and nearly all other injection molded plastic resins.
Clear castings are achievable and hardnesses ranging from a soft 15A up to a hard 90D.


Typical timing for this rotational casting process is about 1-2 weeks.

RotoCAST Rotational Molded PrototypesWhen to Use Rotational Casting

Projects that require thin wall hollow parts are ideal for this technology. Example projects would be:

  • Bottles
  • Tanks
  • Statues
  • Art Work
  • Banks
  • Bellows

Contact ProtoCAM for Rotational Casting / RotoCAST Molds

Contact Us to inquire about how ProtoCAM can help you with your RotoCAST mold needs or to request a quotation.