Apparatus and system for producing foamed cementitious products
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United States of America Patent
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Aug 26, 1997
Grant Date -
N/A
app pub date -
Dec 6, 1994
filing date -
Dec 6, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for introducing a metered volume of air into a continuously generated and flowing slurry composed of metered dry cementitious material, metered water and metered air entraining (or foaming) agent and for homogenizing this air into bubbles or cells of relatively small size to produce a uniform cellular product. The apparatus comprises a positive displacement progressive cavity slurry pump driven by a variable speed motor. By driving the pump at a speed in excess of the speed required to accommodate the volume of slurry being generated, the pump will draw air proportionately to this excess of speed. Further elements of the apparatus comprise a closed conduit system for the slurry discharging from the pump, this system communicating with a cylindrical homogenizing apparatus wherein rotating elements homogenize the metered air and slurry with the cooperation of the air entraining agent into a foamed material having relatively small air cells of uniform size. The homogenized slurry material is propelled through and beyond the homogenizing apparatus through a communicating conduit to the point of deposit.
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