| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold for injection foam molding capable of molding a foamed resin molded article having a through-hole provided thereto so as to pierce through the molded article in the thickness direction thereof by injection foam molding so that the through-hole becomes a hole having the same diameter over the total length thereof and covered with a skin layer. SOLUTION: A piece member housing hole 5 is provided to either one of the opposed surfaces of a fixed mold 1 and a movable mold 2 and the head 4a of a piece member 4, which is composed of the head 4a and the rod-like body 4b, which is provided to the central part of the leading end surface of the head 4a in a protruded state and has length equal to the thickness of the foamed resin molded article A, is internally mounted in the piece member housing hole 5 in a freely slidable manner. The base end face of the head 4a is always pressed by a coil spring 6 and, after the skin layer 8 is formed to the inner surface of a cavity 3, which is filled with a foamable molten resin so that the molten resin comes into contact with the inner surface of the cavity 3, or the peripheral surface of the rod-like body 4b after mold clamping, the movable mold 2 is allowed to retreat to obtain the foamed resin molded article A to which the through-hole (a) is provided by the rod-like body 4b. COPYRIGHT: (C)2011,JPO&INPIT |
