Air impact molding machines for making sand molds

Details Air impact molding machines for making sand molds Air impact molding machines for making sand molds

1989-10-18

1990-11-13

Seidel, Richard K.

Metal founding

Means to shape a forming surface

Including means for compacting particulate fluent mold...

164 37, B22C 1500

Patent

active

049695037

ABSTRACT:
The machine includes a compressed air bell-shaped ejector, a sand supplying hopper positioned above a diffuser located over a molding box receiving sand from the hopper. The sand supplying hopper is arranged axially inside the compressed air bell-shaped ejector so that an annular mouth is defined, which surrounds a sand discharge mouth of the hopper. The mouth of the hopper and the mouth of the ejector both face the diffuser which closes the top of the molding chamber. A valve for closing the bell-shaped ejector includes a tubular membrane which is adapted and fixed at its edges to the internal surface of the diffuser, at a coaxial portion thereof which faces the hopper.

REFERENCES:
patent: 4588017 (1986-05-01), Damm et al.
patent: 4609033 (1986-09-01), Kobel et al.

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