Pressure vessel and method for manufacturing pressure vessel
AssigneeYachiyo Industry Co., Ltd.
InventorJunya Yoshioka
Life of this patent
Estimating the term…
Abstract
Provided is a pressure vessel comprising a liner and an insert member that are integrally formed by blow molding the liner. The insert member has a cylindrical shape with an inner diameter opening portion. The liner is molded integrally with the insert member by inserting a parison through the inner diameter opening portion and performing blow molding. Since the liner is inserted inside the insert member and is blow molded, a pinched portion is not generated. Consequently, strength of the pressure vessel can be improved, and fluid is prevented from leaking between the liner and the insert member.
Claims4
A pressure vessel comprising a liner and an insert member integrally formed by blow molding the liner, wherein
- the insert member has a cylindrical shape to have an inner diameter opening portion along a central axis, and
- the liner is integrally molded with the insert member by inserting a parison into the inner diameter opening portion to perform blow molding,
- the liner includes a cylindrical body portion, an inlet/outlet portion disposed inside the inner diameter opening portion, and a shoulder portion which connects the body portion with the inlet/outlet portion, and
- the inlet/outlet portion is formed to extend along an entire length in an axial direction of the inner diameter opening portion.
A method for manufacturing a pressure vessel comprising steps of:
- holding a cylindrical insert member having an inner diameter opening portion along a central axis as a first step;
- inserting a parison into the inner diameter opening portion of the insert member and a molding die as a second step;
- and
- supplying air via a blow pin after the second step, and transferring the parison to a molding surface of the molding die and the inner diameter opening portion to perform blow molding as a third step,
- a liner of the pressure vessel includes a cylindrical body portion, an inlet/outlet portion disposed inside the inner diameter opening portion, and a shoulder portion which connects the body portion with the inlet/outlet portion, and
- the inlet/outlet portion is formed to extend along an entire length in an axial direction of the inner diameter opening portion.
Dependencies are inferred from the claim text.