Secondary pressurization casting method

Details Secondary pressurization casting method Secondary pressurization casting method

1988-08-23

1989-07-11

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164319, B22D 1802, B22D 2711

Patent

active

048462527

ABSTRACT:
A secondary pressurization casting method, in which molten metal is injected into and filled in a cavity of a mold and then a secondary pressurizing force is exerted upon the filled molten metal by making a secondary pressurization pin advance within a through-hole formed in the wall of the mold. After commencement of filling of the molten metal in the cavity, the secondary pressurization pin placed at an initial set position is once retreated, and subsequently it is made to advance to pressurize the molten metal. A casting fin produced around the outer circumference of the tip end of the secondary pressurization pin during the period when the molten metal is being injected and filled, is integrated with the molten metal entered into the through-hole as a result of the retreat of the secondary pressurization pin, and subsequently it is pushed into the cavity by the secondary pressurization pin. Accordingly, it would never occur that the movement of the secondary pressurization pin is prevented by a wedge effect of a casting film.

REFERENCES:
patent: 3106002 (1963-10-01), Bauer

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