System for sintering molds and for preparing cast products

Details System for sintering molds and for preparing cast products System for sintering molds and for preparing cast products

1984-06-22

1986-09-02

Godici, Nicholas P.

Metal founding

Combined

B22D 2700

Patent

active

046090312

ABSTRACT:
A system for sintering molds and for preparing cast products by the use of the thus preformed molds is provided. The system is particularly suited for the production of cast articles made of an alloy, such as magnesium alloys, which is susceptible to cracking unless the cast mass is slowly cooled at least across the solid solution forming temperature range. The system comprises a composite sintering-annealing furnace including a sintering furnace section and an annealing furnace section. The sintering and annealing furnace sections are juxtaposed to be adjacent with each other and separated by a partition wall through which a plurality of ventilation windows is formed for communicating both sections with each other. A plurality of atmospheric air inlet ports is provided through an external wall defining the annealing furnace section. The temperature in the annealing furnace and the distribution thereof are selectively controlled by changing the mixing ratio of the hot combustion gas sucked from the sintering furnace section to the cold atmospheric air introduced through the air inlet ports. The system further comprises a casting device and a cooling device for effecting initial rapid cooling of the hot cast mass.

REFERENCES:
patent: 3485681 (1969-12-01), Greenwald, Jr.
patent: 4175610 (1979-11-01), Zauhar et al.
patent: 4225121 (1980-10-01), Meyer et al.

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