Bulk Molding Compound (BMC) is a thermosetting plastic material that is composed of polyester resin, fillers, and various additives. It is widely used in the production of electric motor components due to its excellent electrical insulation properties, mechanical strength, and dimensional stability. BMC is produced by blending the ingredients together, and then heating and compressing the mixture into a pre-designed mold. The mold is then cooled, and the hardened BMC molding part is removed.

SMC Motor Manufacturing Process

SMC motor is manufactured through a process called compression molding, which involves:

Preparing the SMC material: SMC material is prepared by mixing chopped glass fibers, thermosetting resin, and other additives.

Placing the SMC material in a mold: The SMC material is placed in a mold that has the desired shape of the motor.

Applying heat and pressure: The mold is heated and pressure is applied to compress the SMC material into the desired shape.

Curing the material: The SMC material is cured by heating it to a high temperature for a specific period of time.

Finishing the motor: The finished motor is removed from the mold and any excess material is trimmed off.

The high-composite precision molds produced by Waiwai Tree have the characteristics of low energy consumption; our SMC and BMC molds have no waste, and there is no need to clear the inner cavity. Having only a small temperature difference, our SMC/BMC composites have stable mold temperature, good appearance, and high efficiency. Thus, they are now widely used in new energy vehicles, high-speed rail, and electric motors.