Method and apparatus for blowing cores etc. with fluidizing air admitted radially at bottom of blow box

Abstract From the Canadian patent

The cavity of a foundry blow box for blowing sand into molds is formed by a tube extending downwardly but terminating slightly above the blow plate forming the bottom of the blow box, thus forming a peripheral gap which is essentially the only aperture for the admission of fluidizing air. The air tends to blow sand contacting the blow plate directly through its exit into the mold although fluidizing the remaining said through the cavity. Preferably especially if quick-setting sand is used a, plunger snugly fitting the tube moves through it to its bottom so that air from the gap scours the plunger and blow plate, blowing out all sand. As the mold is lowered a, purge pan is substituted to …