Patent ID: 7040962

Claim:
A trimming method for a film insert injection molding comprising the steps of: removing a film insert molding from an injection mold, the film insert molding comprising a resin molding and a soft film material having a supported portion adhering integrally to a face of the resin molding, the film material further having an unsupported extending portion extending beyond a peripheral edge of the resin molding; aligning a blast gun with the peripheral edge of the resin molding; supplying an ice slurry to said blast gun; blasting a predetermined concentration of the ice slurry toward a vicinity of the peripheral edge of the resin molding with said blast gun; and moving said blast gun about the peripheral edge of the resin molding during said blasting of said ice slurry in order to separate and remove the unsupported extending portion of the film material extending beyond the peripheral edge of the resin molding by said ice slurry, wherein the peripheral edge of the resin molding supports and prevents damage to the supported portion of the film material during the blasting step, and the unsupported portion is separated from the supported portion along the peripheral edge by the blasting step.