Method of designing cavity shape of mold

Details Method of designing cavity shape of mold Method of designing cavity shape of mold

1990-10-12

1993-07-13

Smith, Jerry

Boots, shoes, and leggings

364578, 2643287, G06F 1546

Patent

active

052279790

ABSTRACT:
The designing of a cavity shape of a mold by utilizing solidification analysis is conducted by (a) preparing a two-dimensional small element model of a casting to be produced in the cavity, the casting including an article portion and a portion connected thereto for feeding a melt to the article portion; (b) determining a solid fraction distribution of the model by conducting the unsteady heat transfer calculation by a heat flux method; (c) correcting the solid fraction distribution by taking into account the heat transfer in a direction perpendicular to the two-dimensional model; (d) observing whether or not there is a closed loop of the solid fraction in the article portion; and (e) modifying the cavity shape to eliminate a closed loop of the solid fraction, if any, from the article portion.

REFERENCES:
patent: 4534003 (1985-08-01), Manzione
patent: 4984166 (1991-01-01), Akasaka et al.
patent: 5031127 (1991-07-01), Fujita et al.
patent: 5097432 (1992-03-01), Harada et al.
Niiyama, E. "Casting," vol. 49, No. 10, 1977, pp. 608-613 (w/abridged translation).
Ohnaka, I. "Introduction of Heat Transfer and Solidification Analysis by Computers," 1985, pp. 202-203 (w/abridged translation).

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