Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1980-10-21
1983-03-29
Crane, Daniel C.
Metal working
Method of mechanical manufacture
Assembling or joining
291592, 29559, 264242, 264264, 264297, B29D 1500
Patent
active
043778950
ABSTRACT:
A method and apparatus for manufacturing double-gear trains in which gears of double-gear trains are molded already in engagement with one another. Upper and lower gear molding cavities are formed in upper and lower molds between which is sandwiched an intermediate mold. Apertures are formed in the intermediate mold for molding shafts which join gear pairs. Thin wall dividing portions are provided between adjacent gears which are molded in engagement with one another. A molten resin introducing cavity is formed between an outer mold and the upper mold. Coupling pieces may also be molded simultaneously with the formation of the double-gear train.
REFERENCES:
patent: 3362675 (1968-01-01), Ferdig
patent: 3443005 (1969-05-01), Braun
patent: 3727427 (1973-04-01), Eyman, Jr. et al.
patent: 3835519 (1974-09-01), Hetzel
Crane Daniel C.
Kabushiki Kaisha Sanyo Seiki Sisakusho
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