Fluid metering, mixing and dispensing machine

Details Fluid metering, mixing and dispensing machine Fluid metering, mixing and dispensing machine

1975-12-15

1980-09-23

Spar, Robert J.

Dispensing

Plural sources, compartment, containers and/or spaced jacket

With discharge assistant for each source

2221445, 222318, 137563, 137599, 251205, 366133, 366156, 366177, 366186, 425208, 425217, B29B 500, B01F 724

Patent

active

042238110

ABSTRACT:
A machine for mixing , metering and dispensing fluids such as polyurethane, elastomers etc., composed of a number of fluid components. A valve assembly, during a recirculation cycle, receives a component from a source and returns the component to the source. During a shot cycle, the valve assembly directs at least part of the component into a mixing chamber which receives a component from another valve assembly to mix them and form, for example, polyurethane. In one embodiment, the valve assembly has a partition which divides the component entering the assembly into at least two channels, both of which direct fluid back to the source. One of the channels also has a port communicating with the mixing chamber. Each channel has a rototable ball valve, in which the one channel ball valve is rotatable to direct a predetermined amount of fluid to the mixing chamber and to the source. The other ball valve is rotatable to close its channel a predetermined degree and create an increased back pressure to force more component into the one channel during the shot cycle. Calibration levers are connected to each ball valve to preset their degree of rotation and provide a predetermined quantity of component in the mixing chamber. A control system controls the timing of the rotation of the ball valves as well as another valve assembly which introduces purge material into the mixing chamber when the shot cycle is completed.

REFERENCES:
patent: 2734715 (1956-02-01), Knox
patent: 3025001 (1962-03-01), Robson
patent: 3067987 (1962-12-01), Ballou et al.
patent: 3075550 (1963-01-01), Keith
patent: 3075749 (1963-01-01), Mason et al.
patent: 3240432 (1966-03-01), Boettler
patent: 3637136 (1972-01-01), Bok
patent: 3924651 (1975-12-01), Hippel et al.

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