Plastic and nonmetallic article shaping or treating: processes – Utilizing special inert gaseous atmosphere or flushing mold...
Patent
1981-02-17
1982-10-19
Massie, Jerome W.
Plastic and nonmetallic article shaping or treating: processes
Utilizing special inert gaseous atmosphere or flushing mold...
156 51, 264510, 264514, 264555, 264558, 264174, B29D 904
Patent
active
043549926
ABSTRACT:
An improved method and apparatus for fabricating insulated cables, particularly polymeric insulated electrical power cables, resistant to the formation and growth of electrochemical trees is disclosed. Internal pressure on the conductor side of the cable when it is maintained lower than the external pressure on the outer surface of the insulation during extrusion. Extrusion pressure higher than the external pressure results in expansion of the insulation following extrusion. This expansion or swelling reduces the number and size of cracks and voids which are precursors of electrochemical trees. In addition, pressure curing the extruded, insulated cable with a curing medium above its melting point followed by gradual gradient cooling under internal pressure and higher external cooling fluid pressure to around room temperature optimizes the resistance of the cable to nucleation and growth of electrochemical trees.
REFERENCES:
patent: 2656566 (1953-10-01), Berggren
patent: 3538207 (1970-11-01), Toole
patent: 3689610 (1972-09-01), Nicholson
patent: 3737490 (1973-06-01), Nicholson
patent: 3769085 (1973-10-01), Matsbara
patent: 3800019 (1974-03-01), Parsey
patent: 3868436 (1975-02-01), Ootsuji et al.
patent: 3869235 (1975-03-01), Moore
patent: 3922128 (1975-11-01), Solomon
patent: 3928525 (1975-12-01), Fuwa et al.
patent: 4089917 (1978-05-01), Takiura et al.
Cable Technology Labs., Inc.
Massie Jerome W.
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