Methods and apparatus for maintaining a pressure contact seal be

Details Methods and apparatus for maintaining a pressure contact seal be Methods and apparatus for maintaining a pressure contact seal be

1983-04-13

1985-05-21

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With coupling between charger and mold

425572, B29C 100, B29F 1023, B29D 900

Patent

active

045183449

ABSTRACT:
A free floating runner system wherein runner means, including a runner block and its runner extension, are mounted on their axial center lines on support means, with a gap between the runner structures and surrounding structures to allow the runner structures to freely thermally expand radially and axially.
A force compensation system comprised of means, preferably hydraulic, for providing a forward force to the runner structures to offset any rearward force from axial floatation of the runner means and to provide an on-line, effective pressure contact seal between the nozzle sprues and injection cavity sprues.
Methods provide an on-line effective pressure contact seal between co-injection nozzle sprues and injection cavity sprues.

REFERENCES:
patent: 2828507 (1958-04-01), Strauss
patent: 3296353 (1967-01-01), Nouel
patent: 3533594 (1970-10-01), Segmuller
patent: 3535742 (1970-10-01), Marcus
patent: 3553788 (1971-01-01), Putkowski
patent: 3642403 (1972-02-01), Havlik
patent: 3779680 (1973-12-01), Manceau
patent: 3973892 (1978-08-01), Rees
patent: 4276015 (1981-06-01), Rogers

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