METHOD FOR MANUFACTURING HOLLOW MOLDED ARTICLE AND APPARATUS FOR MOLDING HOLLOW MOLDED ARTICLE
First Claim
1. An apparatus for molding a hollow molded article, of which a hollow section is molded between a pair of superimposed, heated and softened thermoplastic resin sheets, by a pair of vacuum molding dies having shaping section to form a concave shape facing each other on the pair of thermoplastic resin sheets and air bleeding holes provided in the shaping sections,wherein one of the pair of thermoplastic resin sheets is formed with a through-hole to which the hollow section is connected, one vacuum molding die corresponding to the one of thermoplastic resin sheet is formed with a notch corresponding to the through-hole, when holding the pair of thermoplastic resin sheets by closing the pair of vacuum molding dies in a state in which the one thermoplastic resin sheet and the other thermoplastic resin sheet are superimposed with each other and are disposed between the pair of vacuum molding dies, and a seal section configured to seal between the shaping section and the notch, formed between the shaping section of the one vacuum molding die and the notch.
1 Assignment
0 Petitions
Accused Products
Abstract
While naturally suctioning air between a first thermoplastic resin sheet and a second thermoplastic resin sheet from a fluid passage formed in a first thermoplastic resin sheet, the first thermoplastic resin sheet is subjected to vacuum-molding by a first vacuum molding die, a first shaping section is formed in the first thermoplastic resin sheet by a molded section of the first vacuum molding die, the second thermoplastic resin sheet is subjected to vacuum-molding by a second vacuum molding die, a second shaping section is formed in the second thermoplastic resin sheet by the molded section of the second vacuum molding die, and a hollow section is defined between the first thermoplastic resin sheet and the second thermoplastic resin sheet by the first shaping section and the second shaping section.
-
Citations
9 Claims
-
1. An apparatus for molding a hollow molded article, of which a hollow section is molded between a pair of superimposed, heated and softened thermoplastic resin sheets, by a pair of vacuum molding dies having shaping section to form a concave shape facing each other on the pair of thermoplastic resin sheets and air bleeding holes provided in the shaping sections,
wherein one of the pair of thermoplastic resin sheets is formed with a through-hole to which the hollow section is connected, one vacuum molding die corresponding to the one of thermoplastic resin sheet is formed with a notch corresponding to the through-hole, when holding the pair of thermoplastic resin sheets by closing the pair of vacuum molding dies in a state in which the one thermoplastic resin sheet and the other thermoplastic resin sheet are superimposed with each other and are disposed between the pair of vacuum molding dies, and a seal section configured to seal between the shaping section and the notch, formed between the shaping section of the one vacuum molding die and the notch.
-
4. An apparatus for molding a hollow molded article, the apparatus comprising:
-
a first molding die; and a second molding die disposed to face the first molding die, wherein a pressing surface for partially holding a pair of resin sheets between the first molding die and the second molding die, a molding surface for forming a concave section with respect to the pressing surface, and a plurality of suction holes provided on the molding surface are provided, the first molding die includes a convex section provided to partially project in comparison with the pressing surface of the first molding die, and further includes a fluid supply source adjacent to the convex section, when holding the pair of thermoplastic resin sheets by closing the pair of molding dies in a state in which the pair of resin sheets are superimposed with each other and are disposed between the pair of molding dies. - View Dependent Claims (5, 6, 7)
-
-
8. An apparatus for molding a hollow molded article, the apparatus comprising:
-
a first molding die; and a second molding die disposed to face the first molding die, wherein each the first molding die and the second molding die has a pressing surface for partially holding two resin sheets between the first molding die and the second molding die, a molding surface for forming a concave section with respect to the pressing surface, and a plurality of suction holes provided on the molding surface, and the first molding die further includes a convex section provided to partially project in comparison with the pressing surface of the first molding die. - View Dependent Claims (9)
-
Specification