GASIFIED PATTERN FOR CAST BLANK OF CUTTING TOOL AND PRESS MOLD FOR MAKING IT Russian patent published in 1995 - IPC

FIELD: casting production. SUBSTANCE: gasified pattern is made of alloyed and non-alloyed polystyrene foams. Only one member of the pattern, that forms a cutting piece of the cast blank, is made of the alloyed polystyrene foam. Press mold for making gasified patterns of cast blanks of cutting tool includes a removable container, separating a volume of a working cavity, forming the alloyed member of the pattern, from a remaining part of the pattern of non-alloyed slightly foamed polystyrene foam. The container is in the form thin-wall shell. EFFECT: enhanced quality of the gasified pattern. 3 cl, 6 dwg