Heated plastic flow control valve

Details Heated plastic flow control valve Heated plastic flow control valve

1990-03-01

1991-05-07

Hepperle, Stephen M.

Fluid handling

With heating or cooling of the system

With electric heating element

425563, B29C 4520, F16K 4900

Patent

active

050128396

ABSTRACT:
A heated plastic flow control valve assembly which is intended for use in controlling the flow of molten plastic to a mold in a molding press includes a spring biased slide valve that cooperates with a valve body to shut of plastic flow unless the slide valve is displaced against the spring. This displacement is caused by engagement of a plastic injection machine nozzle with the slide valve. Two separately controllable heaters are useable to provide two heat zones in the valve assembly.

REFERENCES:
patent: 2230785 (1941-02-01), Sundback
patent: 2359840 (1944-10-01), Goessling
patent: 2804649 (1957-09-01), Hupfield
patent: 3295169 (1967-01-01), Moslo
patent: 3398436 (1968-08-01), Nouel
patent: 3590114 (1971-06-01), Uhlig
patent: 3810728 (1974-05-01), Jacobs
patent: 3934626 (1976-01-01), Hall
patent: 3941540 (1976-03-01), Driscoll et al.
patent: 4048275 (1977-09-01), Usamoto et al.
patent: 4073469 (1978-02-01), Kodric

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