초록 ▼

A method of producing a resin molded article composed of a base material of a synthetic resin and a surface layer provided on the surface of the base material as one body, which includes preparing a mold having a cavity with an end molding portion for molding the end portion of the resin molded arti

A method of producing a resin molded article composed of a base material of a synthetic resin and a surface layer provided on the surface of the base material as one body, which includes preparing a mold having a cavity with an end molding portion for molding the end portion of the resin molded article and a body molded portion for molding the body of the resin molded article, the width of the end molding portion being larger than that of the body molding portion. The surface layer is disposed within the cavity of the mold, while disposing molten synthetic resin for the base material on one side of the surface layer so as to be held in the cavity of the mold. The mold is then closed and compressed gas is injected into the molten synthetic resin within the end molding portion so as to expand the molten synthetic resin. Finally, the molten synthetic resin is cured in the cavity. According to the present invention, a method of producing a resin molded article having an excellent outward appearance without warpage or deformation in the end portion of the base material can be provided wherein the step of disposing of the end portion such as bending inward, adhesion, etc., can be eliminated.

대표청구항 ▼

A method of producing a resin molded article composed of a base material of a synthetic resin and a surface layer provided on a surface of said base material as one body, comprising: preparing a mold having a cavity with an end molding portion for molding an end portion of said resin molded article

A method of producing a resin molded article composed of a base material of a synthetic resin and a surface layer provided on a surface of said base material as one body, comprising: preparing a mold having a cavity with an end molding portion for molding an end portion of said resin molded article and a body molding portion for molding a body of said resin molded article, a width of said end molding portion being larger than that of said body molding portion; disposing said surface layer within said cavity of said mold, while disposing molten synthetic resin for said base material on one side of said surface layer to be held in said cavity of said mold; closing said mold; injecting compressed gas into said molten synthetic resin within said end molding portion so as to expand said molten synthetic resin; and curing said molten synthetic resin in said cavity.