Method and device for producing an electric insulator made...

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

Reexamination Certificate

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Details

C264S279000, C264SDIG054, C425S125000, C425S542000

Reexamination Certificate

active

10474314

ABSTRACT:
A device including, and a method for producing, an electric insulator made of plastic, the insulator having a centrally arranged core made of glass fiber reinforced plastic, and having a plurality of insulation screens arranged coaxially around the core in an offset manner in an axial direction of the core. The method steps include: positioning a casting mold in an axial position around a vertically arranged core; producing a sealing connection between the core and the casting mold; injecting a liquid plastic material under pressure into an axial area of the casting mold; curing the liquid plastic material in the casting mold, thereby creating an insulation screen; deactivating the sealing connection; displacing the casting mold axially in a downward direction along a defined displacement path; and repeating the above steps until an insulator is produced having a desired number of insulation screens.

REFERENCES:
patent: 3557447 (1971-01-01), Gruber et al.
patent: 5896266 (1999-04-01), Rubinski
patent: 6440348 (2002-08-01), Oppelt et al.
patent: 2 044 179 (1972-03-01), None
patent: 26 57 051 (1978-06-01), None
patent: 1 316 059 (1971-10-01), None
patent: 1316059 (1973-05-01), None
patent: 1 549 049 (1979-07-01), None
patent: 843716 (1981-06-01), None

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