Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1985-12-23
1987-05-12
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
295276, 29DIG5, 425549, 425564, 425566, 425568, 425572, B21D 5300
Patent
active
046638113
ABSTRACT:
This invention relates to an improved method of making nozzles for injection molding. The nozzles are heated by an electrical heating element which is cast in a copper portion between inner and outer stainless steel portions. The method includes making a main rear portion and a steel nose cap portion separately, brazing them together in a vacuum furnace to form an integral unit, and then finishing it by drilling and machining to provide it with a central bore and a particular gating configuration. This method has the advantage that a single inventory of unfinished nozzles can be maintained, from which a requirement for one of several gating configurations can be quickly supplied by finishing the nozzles according to that configuration.
REFERENCES:
patent: 4053271 (1977-10-01), Gellert
patent: 4344750 (1982-08-01), Gellert
patent: 4403405 (1983-09-01), Gellert
patent: 4424622 (1984-01-01), Krause
patent: 4433969 (1984-02-01), Gellert
patent: 4446360 (1984-05-01), Gellert
patent: 4557685 (1985-12-01), Gellert
patent: 4579520 (1986-04-01), Gellert
Goldberg Howard N.
Wallace Ronald S.
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