Method of curing hot box sand cores

Details Method of curing hot box sand cores Method of curing hot box sand cores

1993-12-27

1994-11-22

Batten, Jr., J. Reed

Metal founding

Process

Shaping a forming surface

164 16, B22C 706, B22C 912

Patent

active

053659953

ABSTRACT:
A core box has (i) a thermally conductive cope and drag resiliently sealingly mating at essentially a horizontal parting plane, and (ii) core defining walls enclosing an interior and perforated by sand-filtered ports. A sand, resin and liquid catalyst mixture is blown into the interior to form a sand body. At least the outer skin of the sand body is conductively heated to a first temperature (i.e., 300-400.degree. F.); and essentially simultaneously with the conductive heating, the remainder of the sand body is convectively heated by flowing a heated gas therethrough at a second temperature lower than the first temperature (i.e., 250-290.degree. F.). The heated gas enters the sand body from the drag and exits the sand body by way of the cope.

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The Coldbox-Plus Process-Superior Core Quality at Reduced Binder Lever., Prof. Dr.-Ing. D. Boenisch, Giesserei-Institute, Aachen, West Germany, Giesserei 72, 1985, No. 15, pp. 435-444.

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