Canadian Plastics

New gas “coring” technology targets BMC for handle market

Canadian Plastics   



Chicago-based Bulk Molding Compounds Inc. says it has developed a new method of molding hollow parts from bulk molding compound. The technology, called Gas Evacuation Technique (GET), is a variation o...

Chicago-based Bulk Molding Compounds Inc. says it has developed a new method of molding hollow parts from bulk molding compound. The technology, called Gas Evacuation Technique (GET), is a variation on gas assist molding for thermoplastics. It results in 40% less material usage and a cycle time reduction of up to 70%. The company expects the new process will allow BMC to more effectively compete with thermoplastics in the appliance handle market. Thermoplastic handles molded by gas-assist, which have less material and faster cycle times, have captured the majority of this market from BMC in recent years.

In the GET method, the mold is filled completely with BMC and the thermoset material begins to cure from the outside (near the mold walls). After a pre-determined time, the desired wall thickness has been obtained and a gas port in the mold cavity is pressurized. The gas evacuates the uncured BMC out through the center of the gate, runner and sprue. The material is reclaimed in the press nozzle and mixed with virgin material for the next shot.

Bulk Molding Compounds, Inc. 630-377-1065

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