PRESSURE VESSEL LINER, MOLDING DIE THEREOF, AND PRESSURE VESSEL

摘要

An object of the present invention is to provide a technique for suppressing an occurrence of weld in a pressure vessel liner. A film gate 42 for molding a pressure vessel liner 1 is located on a radially outer side of an outer peripheral end portion of an meshing portion 3 in the pressure vessel liner 1. By disposing the film gate 42 on the radially outer side of the meshing portion 3 with a sufficient space between, it is possible to control the flow rate of the molten resin during molding, thereby suppressing an occurrence of weld.

主权项

1. A pressure vessel liner comprising:
a resin liner main body portion of a bottomed cylindrical shape which includes bottom portions at two axial end portions and in which at least one bottom portion has an opening portion for a mouthpiece to be inserted; a meshing portion that is integrally formed on an axially outer surface of each of the bottom portions, is disposed on a peripheral edge of the opening portion, and includes a convex portion projecting toward an axially outer side and a radially inner side of the liner main body portion and a concave portion connected to the convex portion; and a gate portion that is a trace of a film gate formed during molding and is disposed on the radially outer side from the outer peripheral end portion of the meshing portion, wherein: in the resin liner main body portion,
a peripheral edge portion of each of the bottom portions on a radially outer side forms a dome shape smoothly connected to a peripheral wall of the liner main body portion, andthe bottom portions are depressed axially inward with respect to the peripheral edge portion; and in the meshing portion,
the convex portion and the concave portion are alternately arranged along a circumferential direction of the Liner main body portion,a radially outer end portion of the convex portion and a radially outer end portion of the concave portion constitute an outer peripheral end portion continued in the circumferential direction, anda projection length of the concave portion from the outer peripheral end portion to the radially inner side is shorter than a projection length of the convex portion from the outer peripheral end portion to the radially inner side.