Method of manufacturing a composite insulator
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United States of America Patent
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-
Oct 27, 1987
Issued Date -
N/A
app pub date -
May 22, 1986
filing date -
Mar 25, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of molding the insulating covering of an organic electrical insulator comprising a long central rod (3) having end fittings (5, 6). Retractable supports (11, 12, 21, 22) are disposed at regular intervals along an injection mold for the covering. The covering is injected, and at the end of injection, prior to vulcanization, the supports are retracted. The voids left in the mold (1, 2) by the supports are instantly filled by the injected material. Protective sleeves (24, 25) are interposed between the rod and the said supports.
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