Mold-pressing machine with liquid-mist injection

Details Mold-pressing machine with liquid-mist injection Mold-pressing machine with liquid-mist injection

1994-11-18

1996-02-27

Batten, Jr., J. Reed

Metal founding

Means to shape a forming surface

Including means for compacting particulate fluent mold...

164149, 164267, B22C 1500, B22C 1900, B22C 2302

Patent

active

054940940

ABSTRACT:
In a mold-pressing machine with liquid-mist injection, using atomizing nozzles (9) with a vortex chamber (27) delivering atomized liquid mixed with air through outlet apertures (26), compressed air constantly being supplied to the atomizing-air nozzle (29), while the liquid nozzle (28) receives liquid under pressure through a liquid conduit (19,25), a liquid duct (31) and a slave valve (32,33) controlled by the liquid pressure solely in those periods, during which the liquid mist is desired to be injected, the new feature is that the liquid conduit (19,25) comprises a fast-acting air-escape valve (13), possibly of the same kind as those being used with pneumatic cylinders, causing any air having penetrated into the liquid duct (31) during the rest intervals because of a leak in the slave valve (32,33) to flow to an escape conduit (21). With this arrangement, the formation of air pockets in the liquid conduit is prevented: such air pockets would otherwise reduce the quantity of the liquid being supplied to the liquid nozzle (28) during each succeeding cycle.

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