B - Operations – Transporting – 22 – C
Patent
B - Operations, Transporting
22
C
22/11, 22/158
B22C 11/00 (2006.01) B22C 15/24 (2006.01)
Patent
CA 1059723
ABSTRACT An apparatus and method for forming foundry cores and molds of superior hardness and uniformity in a wide range of sizes includes staging hoppers for storing a first mass of sand coated with a catalyst-polymerizable resin film, and a second mass of sand coated with a catalyst film for polymeriz- ing the resin. In forming the cores or molds these masses are simultaneously and evenly dispersed into a high velocity car- rier air-sand stream and directed through a static mixer, wherein the resin and catalyst-coated sand particles are inter- mingled and at least a partial integration of the films takes place, into a shaping mold cavity, wherein the sand mixture hardens into a desired shape. Because the process is fast and continuous, and allows the use of resin-catalyst systems having very fast hardening times, the apparatus and method are par- ticularly well suited to high volume foundry operations wherein it is desirable to reduce the residence time required in the shaping molds to minimize the number of molds and the storage space required.
250610
Brown Lloyd H.
Eftax Daniel S.p.
Kopp Joseph N.
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