Back to results
US 4,891,081 AGranted
Method for producing a foamed resin molding
AssigneeTokai Chemical Industries, Ltd.
InventorsShuichi Takahashi, Kiyomi Nishida
Life of this patent
Estimating the term…
Abstract
A method and a foamed resin molding in which a skin layer is formed by pressing an expansible film against and into conformity with cavity walls of a mold or a bag-like cover member by foaming pressure of a foamable resin and a foamed resin body molded concurrently and integrally under the skin layer, which facilitate the easy parting of the moldings from the mold without parting agent.
Claims12
A method for producing a foamed resin molding, comprising the steps of:
- interposing a bag-shaped expansible film in a cavity of a mold with an opening in alignment with a parting line of said mold;
- interposing an insert in said bag-shaped expansible film;
- extracting air from said bag shaped film to conform the film to the shape of the insert prior to charging with a foamable resin;
- charging a foamable resin into said bag-shaped expansible film from said opening;
- molding a foamed resin body by foaming said foamable resin while concurrently shaping said bag-shaped expansible film by expanding same by pressure generated by said foaming against and into conformity with the shape of said mold cavity, thereby connecting said insert integrally with the foamed resin body;
- and
- ejecting said foamed resin body covered with a skin layer of the expanded said bag-shaped expansible film and containing said insert as a core from said mold.
4 more elements
A method for producing a foamed resin molding, comprising the steps of:
- placing a bag-shaped expansible film in a bag-shaped cover member, wherein the bag-shaped cover member resists deforming force of foaming pressure sufficiently to resist deformation;
- foaming a foamable resin in said bag-shaped expansible film, while concurrently shaping said bag-shaped expansible film by expanding same against and into conformity with the shaped cover member using pressure generated by foaming the resin.
Dependencies are inferred from the claim text.