Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Polymerizing – cross-linking – or curing
Patent
1997-12-22
2000-02-01
Davis, Robert
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Polymerizing, cross-linking, or curing
249 78, 2642711, 26427111, 26432816, 425116, 4251744, 425543, 425548, B29C 3302, B29C 3306
Patent
active
060199318
ABSTRACT:
A method of molding a composite insulator having a core member and an overcoat portion arranged on an outer surface of the core member, in which a core member having metal fittings at both ends thereof is set in a metal mold for molding the composite insulator, overcoat portion forming materials are filled in a cavity for molding said overcoat portion formed around the core member, and then the overcoat portion forming materials are cured by heat, is disclosed. The improved method includes a step of making a temperature increase of the overcoat portion forming materials near the metal fittings equal to that of the other portion, when the overcoat portion forming materials are cured by heat, by utilizing an additional heating means.
REFERENCES:
patent: 2661390 (1953-12-01), Gelpi
patent: 3971128 (1976-07-01), Rebosio
patent: 4476081 (1984-10-01), Kaczerginski et al.
patent: 4702873 (1987-10-01), Kaczerginski
patent: 5648132 (1997-07-01), Abe et al.
Davis Robert
NGK Insulators Ltd.
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