Yachiyo Industry Co., Ltd.

The Japan Steel Works, Ltd.

Wataru Iwase

Kazuhiro Ohtaki

Satoru Araya

Masahiro Niihori

Yuji Ito

Naoya Tabuchi

Naoto Saito

Takatoshi Watanabe

Ryuichi Kawachi

Naoyuki Murata

Yuji Hisatomi

Yukio Fujiwara

A pressure vessel can include a liner having a cylindrical section and a pair of dome sections; and a reinforcement layer constituted by a fiber-reinforced resin material and formed on the outside of the liner. The pressure vessel's reinforcement layer can include protruding sections formed so as to protrude at the dome sections by high-angle helical winding; and a central section formed by hoop winding which spans the area between each peak of the pair of protruding sections, or by approximate hoop winding in which winding is carried out at a higher angle than the high-angle helical winding.

Pressure vessel

A production apparatus includes the following stations juxtaposed in the following sequence: a parison forming station for forming a parison; a built-in part attachment station where opposite sides of a center die provided with a built-in part are held between a pair of molding dies to locate the center die in the molding dies with the parison between the center die and the molding dies, and the built-in part being attached to the parison transferred to the molding dies; a molding station where the molding dies are closed to mold the hollow molded product; and a conveyance station for taking the hollow molded product out of the molding dies and conveying the hollow molded product. The center die is fixed at the built-in part attachment station, and the molding dies are configured to be movable back and forth between the built-in part attachment station and the molding station.

Production method for hollow molded product

Production apparatus for producing hollow molded product

In a crosshead, a pair of sheets () are formed by bisecting a parison () suspended from a resin flow passage () formed between a core () and a die () by causing a first dividing body () of a separator () provided on the core () or the die () to contact a second dividing body () provided on the core () or the die ().

Crosshead

There are provided a part fixing structure and a part fixing method to a resin-made fuel tank which can firmly fix a part to a tank wall without the need of providing a molding die with a convex portion and a recess. A part fixing method for fixing a tank-associated part to a tank wall of a resin-made fuel tank, the part being formed together with a pair of hook portions, the method comprising a step of burying the hook portions in the tank wall in a melted state when the resin-made fuel tank is molded, thereby fixing the part to the tank wall after the tank wall is cooled. In order to cause the resin of the tank wall to flow well, a chevron portion having a pair of first inclined faces is projectingly provided at the bottom face of the part between the hook portions, and a second inclined face which is inclined in a direction opposite to the buried direction toward the tip of the hook portion is formed at the bottom face of each hook portion.

Part fixing structure to resin-made fuel tank and part fixing method thereto

Growing community of inventors

Saitama, Japan

Wataru Iwase