Metering device for feeding liquids to a mixing head
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United States of America Patent
Stats
-
Apr 25, 1989
Grant Date -
N/A
app pub date -
Aug 27, 1987
filing date -
Sep 3, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A metering device for feeding liquids, in particular chemical components for the production of polyurethane mixtures in a high-pressure mixing head. The device comprises at least a first and a second metering unit of the type having a cylindrical chamber in which a plunger slides to displace a pre-established volume of liquid during its stroke and to feed it to the mixing head. The plunger is connected to a worm screw control device, in which the worm screw control devices of the metering units are interconnected by a mechanical drive actuated by a driving motor; one or more revolution variators can be disposed in the mechanical interconnecting transmission in order to vary the ratios between the speeds of the plungers and, therefore, the quantities metered in relation to the stochiometric ratios between the liquids to be mixed.
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