Manufacturing process for hydrogen pressure tank

Details Manufacturing process for hydrogen pressure tank Manufacturing process for hydrogen pressure tank

2005-08-05

2010-06-15

Griffin, Steven P (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

C264S259000, C264S299000

Reexamination Certificate

active

07736566

ABSTRACT:
A process for manufacturing a compressed gas tank that includes a combination of an injection molding process and a rotomolding process. In a first step, a boss to be positioned in the opening of an outer structural layer of the tank is provided and a thin portion of the liner is injection molded to the boss so that a channel within the boss is filled with the liner material to increase the seal integrity between the boss and the liner. Once the liner material is hardened, the surface of the injection molding liner portion is cleaned. Next, a rotomolding process is performed to mold the remaining portion of the liner to the boss. During the rotomolding process, the injection molded portion of the liner melts to be part of the liner made during the rotomolding process.

REFERENCES:
patent: 5746961 (1998-05-01), Stevenson et al.
patent: 6415941 (2002-07-01), Huse
patent: 2005/0194714 (2005-09-01), Nish et al.

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