Method of restoring used molding sand

Details Method of restoring used molding sand Method of restoring used molding sand

1998-10-09

2000-05-02

Lin, Kuang Y.

Metal founding

Process

With measuring, testing, inspecting, or condition determination

164 5, B22C 518

Patent

active

060560428

ABSTRACT:
Measuring the degree of restoration during the restoring treatment of the used molding sand and comparing the measured degree of restoration to a permissible degree, comprising the following steps: First, the restored sand is photographed to project it as a picture on a monitor. A picture-processing device divides that picture into a certain number of picture parts and the brightness of each picture part is compared to the standard brightness, which is chosen beforehand. The degree of restoration is judged based on the number of picture parts that are lighter or darker than the standard brightness. The restoring treatment is stopped when the result of the comparison shows that the restoration has reached the permissible degree, but is continued when the result does not reach it. The operation of measuring the degree of restoration during the treatment is also repeated until it reaches the permissible degree. Then the treatment is stopped.

REFERENCES:
patent: 5167270 (1992-12-01), Henych

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