Machine for mixing aggregate and resin

Details Machine for mixing aggregate and resin Machine for mixing aggregate and resin

1975-07-07

1977-01-25

Aegerter, Richard E.

259154, 259157, 259164, B01F 724

Patent

active

040047822

ABSTRACT:
A machine for mixing a resinous binder compound with aggregates on a continuous flow basis to produce a building material or the like, without the use of cement or water. Aggregate is fed into a first mixing chamber where a metered amount of resin binder composition is added thereto. The mixture is then passed into a first rotating mixing tube having a rotating mixing screw conveyor therein with triangular teeth between the convolutions of the screw. The outer tube rotates contra to the direction of the inner screw which produces a thorough mixing action, coating each particle of the aggregate with the resin binder composition. This mixture is then fed into a second mixing chamber where a metered amount of a second resin binder composition is mixed with the aggregate. A second mixing tube, also having a rotating mixing screw conveyor and triangular teeth, then thoroughly mixes the blend. The resultant aggregate product is then conveyed to a discharge spout. Cam-controlled hydraulic plungers tamp the aggregate in the mixing chambers to cause it to flow continuously into the mixing tubes. The angle of the triangular teeth is carefully selected to provide a thorough churning or turbulent mixing action. After the end of a run, the machine is cleaned by (1st) stopping the flow of metered binder composition, (2nd) feeding dry sand or aggregates into the second mixing chamber to scour out the second mixing chamber, the second mixing tube, and the discharge conveyor before the resin binder compounds harden, (3rd) feeding aggregate into the first mixing chamber to scour it and the first mixing tube, and flow thru the sequence of the second mixing unit.

REFERENCES:
patent: 1713568 (1929-05-01), Swenson
patent: 2028745 (1936-01-01), Hendrick et al.
patent: 3194538 (1965-07-01), Murray
patent: 3670923 (1972-06-01), Hawes, Jr. et al.
patent: 3762691 (1973-10-01), Troy

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