Process and device for filling cavities, particularly mold cavit

Details Process and device for filling cavities, particularly mold cavit Process and device for filling cavities, particularly mold cavit

1979-06-28

1981-03-17

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

2643282, 264DIG83, 425543, 425817R, 521917, B29D 2700

Patent

active

042566797

ABSTRACT:
The instant invention broadly relates to a process and apparatus for filling a cavity with a reactive mixture. More particularly, the invention relates to a process for filling cavities, particularly mold cavities, with a reactive, flowable mixture which preferably forms foam, wherein at least two reaction components are brought into a mixing zone, where they are mixed and then brought into the cavity, the improvement wherein at the beginning of the filling process, during a limited time interval, the reaction mixture is fed into the cavity under low flow velocity until the mixture has reached a certain level in the cavity, and subsequently the remaining mixture to be injected, is fed in under increased flow velocity.

REFERENCES:
patent: 2990252 (1961-06-01), Geldern et al.
patent: 3122785 (1964-03-01), Weinbrenner et al.
patent: 3220801 (1965-11-01), Rill et al.
patent: 3222134 (1965-12-01), Peterson
patent: 3264067 (1966-08-01), Alderfer
patent: 3451786 (1969-06-01), Perrin
patent: 3617029 (1971-11-01), Breer et al.
patent: 3982870 (1976-09-01), Boden et al.
patent: 3991147 (1976-11-01), Knipp et al.

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