Method of producing composite insulator
AssigneeNGK Insulators, Ltd.
InventorShigeo Ishino
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Abstract
The disclosed method of producing a composite insulator having a core portion, a sheath portion arranged on an outer surface of the core portion, and a plurality of shed portions projected from the sheath portion by using a die and heating the die, includes a step of cooling both end portions of the core portion. In the disclosed method, it is possible to provide a method in which cracks are not generated in the both end portions of the core portion during producing.
Claims6
A method of producing a composite insulator having a core portion, a sheath portion arranged on an outer surface of said core portion, and a plurality of shed portions projected from said sheath portion by using a die and heating said die, further comprising:
- molding said sheath portion and said plurality of shed portions on said core portion,
- cooling both end portions of the core portion by a cooling means arranged in said end portion,
- said cooling reducing the temperature of both end portions of said core portion during molding of the plurality of shed portions and sheath portion.
Dependencies are inferred from the claim text.