Method of producing synthetic resin made articles having porous elastic member

Abstract

A method of producing a synthetic resin made article having a porous elastic member, which is useful as an air duct opening/closing damper adaptable in air conditions for automobiles, including the steps of: placing a porous elastic member in position against the inner wall surface of one of the opposing segments of an injection mold splittable into two or more segments; closing said injection mold and compressing said porous elastic member by the clamping pressure; casting a synthetic molding resin along the surface of said porous elastic member; and applying a dwell pressure of a preset level for a prescribed period of time to the synthetic resin injected into said mold, and a method of producing a synthetic resin made article having porous elastic members, which is useful as an air duct opening/closing damper adapted in air conditions for automobiles, which includes the steps of: placing the porous elastic members in position against the inner wall surfaces of each pair of opposing segments of an injection mold splittable into two or more segments; closing said injection mold and compressing said two porous elastic members by clamping pressure while the protuberant end of a gate provided in the mold is thrust into said elastic members so that said protuberant gate end will pass through one of the two porous elastic members and slightly wedge into the surface of the other elastic member; casting a synthetic molding resin along the opposing faces of said two porous elastic members; and applying a dwell pressure of preset level, for a prescribed period of time, to the synthetic resin injected into said mold.

Dependencies are inferred from the claim text.