BMC & SMCMolds · Compression & Injection Molded Parts
Secondary operations
Deflashing and finishing after molding
Every thermoset part comes out of the mold with a thin flash along the parting line or shear edge, so deflashing is the first operation. After that the part gets whatever it needs before assembly: drilled holes, machined faces, inserts, bonding, painting or labels.
Cured BMC and SMC are abrasive and cannot be remelted or welded, so machining uses carbide or PCD tools with dust extraction, and painting needs a primer suited to the compound.
Operations
- Manual or media deflashing
- CNC drilling, milling and trimming
- Threaded and press-fit inserts
- Adhesive bonding and assembly
- Priming and painting
- Labeling, inspection and packing
Secondary operations FAQ
How is flash removed from SMC and BMC parts?
By trimming and filing along the parting line and shear edge, or by media blasting or tumbling for smaller BMC parts.
Can SMC and BMC parts be machined?
Yes, with carbide or PCD tools and dust extraction, because the glass fibers are abrasive. Drilling and trimming are the most common operations.