China United Mould

BMC & SMC Molded Parts

Custom thermoset parts

Custom SMC and BMC parts, molded to your drawing

BMC and SMC are glass-fiber-reinforced thermosets. Once cured they do not melt, so the parts hold their shape and strength at temperatures where many thermoplastics soften. They resist many chemicals and outdoor weathering, insulate well and come in flame retardant grades. A common reason to use them is replacing a steel, die-cast or thermoplastic part in an electrical, automotive, lighting or construction product.

We supply SMC parts made by compression molding and BMC parts made by injection or compression molding, to your drawing, with deflashing, machining and inspection as specified.

SMC molded parts: meter box, enclosure door, water tank panel and battery cover

Compression molded SMC enclosures, panels, covers and structural parts.

BMC reflectors, breaker housings, motor parts and insulators, injection or compression molded.

BMC parts: headlamp reflectors, breaker housing, motor end cap and insulators

Typical applications

BMC & SMC parts FAQ

Why use BMC or SMC instead of metal?

BMC and SMC parts are lighter than steel, do not rust, insulate electrically, can be flame retardant and combine ribs, bosses and mounting points in one molded part. That often costs less in total than a fabricated or cast metal part.

Why use BMC or SMC instead of a thermoplastic?

Thermosets keep their stiffness and shape at temperatures where many thermoplastics soften, creep less under load, shrink very little and offer high electrical insulation and flame resistance.

Can BMC and SMC parts be colored?

Yes. Pigmented grades give molded-in color, and parts can also be painted after molding with a suitable primer.

Have a BMC or SMC part in mind? Send us your drawing for a quotation.