Patent ID: 7300614
Filing Date: 2007-11-27
Classification: B29C,B29K,B29L,Y10T

Abstract:
1. A method of manufacturing a resin molding made by integrally joining a first resin molded part and a second resin molded part together via their joining portions, the method comprising: a step of molding a concave portion as the joining portion when molding the first molded part, the concave portion comprising a fitting sleeve projecting from the first molded part and a projection projecting within the fitting sleeve from the first molded part; a step of molding a convex portion as the joining portion when molding the second molded part, the convex portion comprising a pedestal projecting from the second molded part, a fitting sleeve projecting further outward from the pedestal, and a bush locating inside the pedestal and having a through-hole in a central portion thereof; a step of mating the fitting sleeve of the concave portion with the fitting sleeve of the convex portion so that a cavity in communication with one end of the through-hole is formed between the projection and the fitting sleeve of the concave portion and the fitting sleeve of the convex portion; a step of holding the first and second molded parts mating the concave portion with the convex portion so as to form the cavity therebetween; a step of connecting a tip of an injection nozzle to the other end of the through-hole, the injection nozzle being used to inject a molten resin into the cavity between the first and second molded parts; and a step of filling the molten resin into the through-hole and the cavity from the injection nozzle so that the concave and convex portions are integrally joined by the molten resin.