Patent ID: 9210995
Filing Date: 2015-12-15
Classification: A46B,A46D,B29C,B29L

Abstract:
1. A method of manufacturing a toothbrush, the method comprising: providing an integral head mold configured to simultaneously form bristles and a head board in one injection molding process; heating head molding material in an injection molding machine to a predetermined temperature to melt the head molding material; filling the integral head mold with the melted head molding material; applying a holding pressure with use of the injection molding machine to the integral head mold for a predetermined period; applying a cooling process using water to the integral head mold to produce a molded integral head, wherein the molded integral head includes a plurality of individually spaced apart bristles that are integrated on the head board; providing a handle mold; heating handle molding material to a predetermined temperature; filling the handle mold with the handle molding material; applying pressure to the handle mold for a predetermined period; and applying a cooling process to the handle mold to produce a molded handle.