Method and device for cooling foundry sand

Agitating – Mortar mixer type – Methods

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366 22, 366 40, 366139, 62100, B28C 546

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059158336

ABSTRACT:
A cooling apparatus for used foundry sand provided with a homogenizing and conveying apparatus in a constant vacuum with controlled water inflow and a suction point for the water vapor, the water evaporating due to the reduced pressure draws the heat of evaporation from the sand, the apparatus having a condenser in which the vapor condenses into water which is cooled and re-used, and coupled locks provided on the inlet and outlet of the conveying apparatus, through which the sand enters and leaves the reduced pressure area.

REFERENCES:
patent: 2585739 (1952-02-01), Christian
patent: 4252001 (1981-02-01), Musschoot
patent: 4361405 (1982-11-01), Wedek et al.
patent: 4611469 (1986-09-01), Musschoot
patent: 5279741 (1994-01-01), Schott
European search report from corresponding European prosecution dated Mar. 4, 1997.
Blatz J. Formsandkuhlung unter Vakuum. Giesserei 79(1992) No.:15, 628-635 (English translation provided).

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