Molding machine for hollow article and molding method for the same
OwnerAkira Toshikawainventor
Life of this patent
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Abstract
A molding machine for molding a hollow article which has at least two laminated layers. The molding machine comprises: a pair of molds 1, 2 capable of opening and closing; a core pin 3 which is disposed between the molds 1, 2 and which allows a bottom layer material 51 to fit on a peripheral surface of the core pin 3; a parison transfer device 4 which supplies a parison 42, as a top layer material, between the bottom layer material 51 and the molds 1, 2; and a pair of slide members 13 disposed in at least one of the molds 1, 2 and movable to and away from the core pin 3. The molds 1, 2, the slide members 13 and the core pin 3 are arranged to define a space which corresponds to the hollow article, when the molds are closed.
Claims11
A molding machine for a hollow article which has at least two laminated layers, which comprises:
- a pair of molds which are capable of opening and closing;
- a core pin which is disposed between the molds and which allows a bottom layer material to fit on a peripheral surface of the core pin;
- a parison transfer device which supplies a parison, as a top layer material, between the bottom layer material and the molds;
- and
- a moving unit which is disposed in at least one of the molds and which moves to and away from the core pin,
- wherein the pair of molds, the moving unit and the core pin are arranged to define a space which corresponds to the hollow article, when the molds are closed.
A molding method for a hollow article which has at least two laminated layers, which comprises the steps of:
- placing and fitting an annular bottom layer material on a peripheral surface of a core pin which is disposed at the center of a pair of molds;
- supplying a parison around an outer periphery of the bottom layer material so as to enclose the core pin and the bottom layer material by the parison;
- closing the molds, except a moving unit which is provided in at least one of the molds, thereby making a partially interrupted molding surface;
- and
- moving the moving unit in order to complete the molding surface, thereby molding a hollow article.
Dependencies are inferred from the claim text.