Plastic article or earthenware shaping or treating: apparatus – With control means responsive to independently operated timer – For timing period mold is closed or period molding pressure...
Patent
1986-06-19
1987-09-01
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
With control means responsive to independently operated timer
For timing period mold is closed or period molding pressure...
264 403, 264 405, 2643284, 26432811, 425157, 425159, 425557, 425591, B29C 4502, B29C 4570
Patent
active
046906290
ABSTRACT:
An injection molding machine for small-sized articles of thermoplastic synthetic resin comprises a hydraulically pressurizable injection head cylinder operable on an injection cylinder of an injection unit for injecting molding material into a mold, a hydraulically pressurizable clamping cylinder operable on one of a pair of mold members of the mold for opening and closing the mold, and a booster operatively connected to both the injection head cylinder and the clamping cylinder for converting pneumatic pressure into high hydraulic pressure to actuate the two cylinders in timed relation to each other.
REFERENCES:
patent: 2478013 (1949-08-01), Roddy
patent: 2568042 (1951-09-01), Vltavsky
patent: 2671246 (1954-03-01), Lester
patent: 2804752 (1957-09-01), Norman et al.
Heitbrink Timothy W.
Woo Jay H.
Yoshida Kogyo K. K.
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