A pattern is more than a copy of the final part
Pattern geometry must account for the molding process, material shrinkage, machining allowances, draft angles, and parting strategy. A CAD model of the finished component therefore usually needs additional engineering before pattern production.
Where does 3D printing help?
The method is useful for one-off and short-run projects, complex surfaces, and large patterns that would take significant time to produce conventionally. Segmentation makes it possible to manufacture objects larger than a single machine’s working area.
Reconstructing an existing component
When documentation is unavailable, a 3D scan can provide the starting geometry. The measurement data must then be cleaned and converted into a model that reflects the foundry’s requirements. A raw scan is not yet a production-ready casting pattern.
Surface and durability
The finish depends on the molding process and expected number of uses. After printing, a pattern may require assembly, reinforcement, surface processing, coating, and dimensional inspection.
Starting the conversation
Send the part documentation, a 3D model, or photographs of the existing component. Information about the cast material, molding process, expected quantity, and required allowances is equally important.