Method and apparatus for compacting granular moulding materials

Details Method and apparatus for compacting granular moulding materials Method and apparatus for compacting granular moulding materials

B - Operations, Transporting

22

C

22/39

B22C 15/00 (2006.01)

Patent

CA 1201268

ABSTRACT OF THE DISCLOSURE Loosely poured granular material is compacted by a burst of air under pressure which is built up in a space Q1 and is abruptly released through the outlet end of a passageway Q3 which opens toward the material surface. While the pressure in Q1 is being built up and until released, it is restrained by a sealing member which concurrently covers the outlet side of Q1, the input end of passage Q3 and an accelerating space Q2. The sealing member is held in place by a counterpressure in a space Q4 acting on a larger surface area than Q1. The pressure is suddenly decreased in Q4, abruptly unbalancing the pressures and releasing the pressurized gas from Q1 into Q3 and against the surface. -37-

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