Apparatus for manufacturing cores and molds with pressurized sta

Details Apparatus for manufacturing cores and molds with pressurized sta Apparatus for manufacturing cores and molds with pressurized sta

1975-04-21

1976-11-16

Shore, Ronald J.

Metal founding

Means to shape a forming surface

Including means for compacting particulate fluent mold...

164228, B22C 1524, B22C 1312, B22C 706

Patent

active

039918122

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 under pressure a first mass of sand coated with a catalyst-polymerizable resin film, and a second mass of sand coated with a catalyst film for polymerizing the resin. In forming the cores or molds these masses are simultaneously and evenly dispersed from the hoppers into a high velocity carrier air-sand stream and directed through a static mixer, wherein the resin and catalyst-coated sand particles are intermingled 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. The staging hoppers each include a pressurized infeed portion void of sand to provide more even feeding from the hoppers into the air-sand stream to produce cores of improved consistency.

REFERENCES:
patent: 2372957 (1945-04-01), Keefer
patent: 3179134 (1965-04-01), Sigrist
patent: 3472307 (1969-10-01), Godding
patent: 3580326 (1971-05-01), Edwards
patent: 3716082 (1973-02-01), Green
patent: 3800985 (1974-04-01), Grout et al.

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