Patent ID: 9073286
Filing Date: 2015-07-07
Classification: B29C,B29L,B32B,B60J,Y10T

Abstract:
1. A method for manufacturing a composite molded article which integrally includes: a main body member configured to be attached to a member to be attached, formed in an elongated shape from a polymer material having rigidity, and having a hollow space formed therein along a longitudinal direction thereof; and a cushion member formed from an elastic polymer material having a lower degree of hardness than the main body member, joined to an edge of the main body member, and having an elongated portion extending in the longitudinal direction along the edge, the method comprising: a step of preparing the main body member to which a through hole, which allows the hollow space to communicate with external air, is formed to a peripheral wall surrounding the hollow space by removing at least one protruding portion which is formed to one surface of the peripheral wall and protrudes toward a direction away from the peripheral wall; a step of setting the main body member in an injection molding die when the injection molding die is open, by using the openable and closable injection molding die for molding the cushion member; a step of fixing the main body member within the injection molding die, forming a molding cavity for molding the cushion member by the main body member and a molding die face formed inside the injection molding die to at least a portion of the main body member in the longitudinal direction, and allowing the through hole to communicate with the molding cavity, by closing the injection molding die; and a step of injecting the heated and melted elastic polymer material from an injection gate after the injection molding die is closed, molding the cushion member by making a portion of the elastic polymer material flow into and fill the molding cavity, and forming a filling portion that fills the hollow space by making a portion of the elastic polymer material flow into and fill the hollow space from the through hole.