Vibratory method for packing foundry sand into a pattern...

Details Vibratory method for packing foundry sand into a pattern... Vibratory method for packing foundry sand into a pattern...

B - Operations, Transporting

22

C

22/164

B22C 15/10 (2006.01)

Patent

CA 1177221

Abstract The invention relates to the casting of molten metal where a pattern embedded in sand is used to deter- mine the shape into which the molten metal is formed. To ensure that the foundry sand fully penetrates all cavities and recesses of the pattern, the mold flask containing the pattern and sand is first vibrated at a frequency and stroke to produce accelerations in excess of the acceleration due to gravity to cause the sand to penetrate and completely fill all cavities, etc., in the pattern and then the accelerations are reduced to produce an acceleration less than the acceleration due to gravity to compact the sand in place.

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