公开(公告)号：US06660217B2

公开(公告)日：2003-12-09

申请号：US09867539

申请日：2001-05-31

申请人： Masaaki Ogawa

发明人： Masaaki Ogawa

IPC分类号： B29C4950

CPC分类号： B29C49/04 ,  B29C49/50

摘要： A blow molding method for forming a hollow resin product comprises a parison extruding step, a protrusion abutting step and a confronting rod abutting step. In the extruding step, a parison is extruded from a die head towards a position interposed between a pair of molding portions. Each molding portion has a mating surface and a parison-cutting-protrusion erected from the mating surface. In the protrusion abutting step, the protrusions are abutted from each other. In the confronting rod abutting step, the spherical surfaces formed at tip ends of the rods protruded from the mating surfaces of the molding portions are abutted from each other. These steps are simultaneously executed, to thereby remove a flash from a product when the molding portions are closed. In addition to this, the rods mounted on one of molding portions are mounted on the same so as to be adjustable in its protruding length from the mating surface.