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Method and apparatus for mixing foundry materials

Image Number 2 for United States Patent #3934858.

A method of, and apparatus for, mixing foundry sand, resin binder and catalyst, wherein sand/resin and sand/catalyst mixtures are prepared separately in continuous mixers and conveyed to a final mixing chamber having a vertical high speed rotating shaft with downwardly inclined mixer blades and upwardly inclined deflector blades.

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