Method of molding a polar boss to a composite pressure vessel

Details Method of molding a polar boss to a composite pressure vessel Method of molding a polar boss to a composite pressure vessel

1994-06-24

1996-07-23

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264512, 264230, 264249, B29C 4514

Patent

active

055386806

ABSTRACT:
A method for securing a boss to a thermoplastic liner of a pressure vessel are disclosed. A preferred method of forming the vessel includes inserting a thermoplastic projection of the liner into a mounting aperture located in the boss. The projection, which is rigidly attached to the liner, mechanically prevents rotation of the boss about a pressure chamber orifice relative to the liner. The method further includes melting and compressing the thermoplastic projection to conform it to a locking chamber in the mounting aperture. A composite case is then constructed over the thermoplastic projection, the liner, and the boss, using the liner as a mandrel. The thermoplastic liner and projection are integrally formed by blow-molding thermoplastic material into a die without any substantial use of injection-molding. A vessel constructed according to the method is also disclosed.

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