Manufacturing method of multi-stage stamping device and middle mold included therein

Abstract

Provided are a small multistage press device in which height is controlled and a method for manufacturing an intermediate mold included therein. The present invention is a manufacturing step (S1) for an intermediate mold (30) constituted of a single member and in which molding surfaces are formed on each of an upper surface and a lower surface. The manufacturing step (S1) comprises: a reinforcing step (S11) of reinforcing an evaporative pattern (40) which has the same shape as the intermediate mold (30) with a reinforcing member (50) that supports the portions of the evaporative pattern (40) on which surfaces corresponding to the two molding surfaces of the intermediate mold (30) are formed; a placement step (S12) in which the evaporative pattern (40) is placed within a casting frame (60) such that the surfaces corresponding to the two molding surfaces of the intermediate mold (30) are positioned along a perpendicular direction; a first sand filling step (S13) in which casting sand (70) is injected into the casting frame (60); a second sand filling step (S14) in which casting sand (70) is injected into the casting frame (60) after the casting frame (60) is reversed up-and-down and the reinforcing member (50) is removed from the evaporative pattern (40); and a pouring step (S15) in which the evaporative pattern (40) is replaced by a melt. A multistage press device (1) is provided with at least one intermediate mold (30).

Description

technical field [0001] The invention relates to a multi-stage punching device for simultaneously punching multiple workpieces and a manufacturing method of the middle die contained therein. Background technique [0002] Conventionally, a multi-stage press apparatus is known in which a plurality of molds consisting of an upper mold and a lower mold are installed in the vertical direction to simultaneously press a plurality of workpieces (for example, refer to Patent Document 1). [0003] In the multi-stage press device described above, the upper die and the lower die disposed between the upper die at the upper end and the lower die at the lower end are respectively fixed to the upper and lower surfaces of the plate-shaped die plate. [0004] Hereinafter, a member composed of a template and an upper mold and a lower mold fixed to the template is referred to as an "intermediate mold". [0005] For example, a multi-stage stamping device with two pairs of dies is provided with o...

AI Technical Summary

Problems solved by technology

Therefore, in terms of structure, the height (length in the vertical direction) of the multi-stage press device increases, which causes a problem that the cost of equipment increases.

[0007] In particular, the intermediate mold is constructed by fixing the upper mold and the lower mold to the upper and lower surfaces of the plate as mentioned above, and the configuration of such an intermediate mold greatly affects the enlargement of the multi-stage press device.

In addition, two or more intermediate molds may be installed in the multi-stage press device, which also greatly affects the increase in size of the multi-stage press device.

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