Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Making hole or aperture in article
Patent
1989-05-01
1991-04-23
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Making hole or aperture in article
264162, 264322, 264324, B29C 4304
Patent
active
050098268
ABSTRACT:
A method of molding thermoplastic material into a collar for use on a drill string is disclosed. Initially a precursor is constructed by rolling a sheet of thermoplastic material, containing long reinforcement fibers, into a tubular "roll" and placing the roll in a generally cylindrical open mold so as to align longitudinal axes of the roll and the open mold. A cylindrical mold core, which mates with the open mold to form a mold cavity, has an end piece perpendicular to the cylindrical portion for closing the mold. The mold core is forced, with correct alignment, into the open mold using high pressure which closes the mold and causes the thermoplastic material, containing long reinforcement fibers, to take the required shape. The thus formed part is cooled and ejected from the mold for use as the precursor. Final steps include machining the ends of the precursor to produce the desired collar.
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Bogatie George E.
Lowe James
Phillips Petroleum Company
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