Process and an apparatus for producing insulators

Details Process and an apparatus for producing insulators Process and an apparatus for producing insulators

1994-03-16

1996-06-04

Davis, Robert

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

15624418, 15624425, 174179, 264139, 264149, 264161, 2642975, 264320, 425116, 425195, 425297, 425408, B29C 4318

Patent

active

055230385

ABSTRACT:
A process for producing, by compression molding, an insulator having a core and a housing consisting of a sheath portion and at least one shade portion around the sheath portion, including the steps of: (A) preliminarily forming a rubbery layer around an outer periphery of the core to obtain a preliminarily molded body by extrusion molding, (B) placing the preliminarily molded body between at least two mold units of a mold; (C) forming a compressed molding by compression molding said preliminarily molded body in a given shape inside a cavity defined by the at least two mold units; and (D) curing the resulting molding. An apparatus is also disclosed for producing such an insulator by compression molding, which apparatus includes (A) a preliminary molding unit, (B) a molding unit form forming a compressed molding from the preliminarily molded body in a given shape by using a mold, and (C) a heater for curing the rubber in the rubber layer.

REFERENCES:
patent: 2435567 (1948-02-01), Albanese
patent: 4312123 (1982-01-01), Wheeler
patent: 4702873 (1987-10-01), Kaczerginski
patent: 4724284 (1988-02-01), Wheeler
patent: 4845318 (1989-07-01), Clabburn et al.
patent: 5233132 (1993-08-01), Soucille
Patent Abstracts of Japan, vol. 17, No. 593 (E-1454), Oct. 28, 1993 & JP-A-05 182 546 (Kunieda Shigehiko) Jul. 23, 1993.
Database WPI, Week 9336, Derwent Publications Ltd., London, GB; AN 93-285023 & JP-A-5 200 773 (NGK Insulators) Aug. 10, 1993.

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