Device for preparing and ejecting a chemically reacting mixture

Details Device for preparing and ejecting a chemically reacting mixture Device for preparing and ejecting a chemically reacting mixture

1987-08-21

1989-11-28

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Organic polymerization

2643286, 425543, 366173, 366196, C08J 900, B29C 4502, B01F 504, B01F 1502

Patent

active

048836451

ABSTRACT:
A device for preparing a chemically reacting mixture and for ejecting the mixture into a mold, the mixture comprising at least two components, in particular a mixture of isocyanate and a polyol that reacts completely to form polyurethane, the device having a mixing head with an outwardly opening bore, and a reciprocable ram coupled to the head. The ram has an ejector rod axially movable in the bore for therewith defining a mixing chamber and for ejecting the mixture from the chamber. The head has inlet passages for inletting the components into the chamber for preparing the mixture. The ram is coupled to a rotational drive for rotating the rod about its longitudinal axis continuously during the preparation of the mixture to avoid any adherence of the mixture to the rod and/or to the wall of the bore. Alternatively, the rod may be oscillated about its longitudinal axis, or along its longitudinal axis.

REFERENCES:
patent: 3908968 (1975-09-01), Bielfeldt et al.
patent: 3921963 (1975-11-01), Neff et al.
patent: 4721602 (1988-01-01), Woitzel

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