JPS56109142A - Mold for production of thin-walled casting - Google Patents

Abstract

PURPOSE: To provide a mold which is so formed as to permit inexpensive and efficient casting by forming an upper mold as a sand mold and a lower mold as a metal mold, and forming pouring spaces and pouring passages to the sand mold.

CONSTITUTION: An upper mold 1 is formed as a sand mold and a lower mold 2 as a metal mold, as a mold for the case of obtaining a casting, like a gate door, which has multiple through-parts (k) on the inner side of a circumferential side frame 6 of large peripheral length and is formed with raised parts 7a on the surface of frame parts 7 forming these through-parts (k). Pouring spaces 1A corresponding to said frame parts 7 are provided to this upper mold 1, and the recessed part 1a corresponding to said surface raised parts 7a and the pouring passages 1B communicating with the pouring spaces 1A are provided to the bottom thereof. On the other hand, the coating surface of the lower mold 2 is formed flat or roughly flat, and a force cooling device A consisting of, preferably, a water pipe 3 and a pump 4 or the like is provided and molten metal is quickly cooled, whereby mechanical properties are improved.

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