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US 3,934,858 AGranted
Method and apparatus for mixing foundry materials
AssigneeFordath Limited
InventorsRaymond Arthur Parsonage, Harold Higgs
Life of this patent
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Abstract
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.
Claims6
Apparatus for producing a foundry mixture of sand and a rapid setting binder comprising:
- means defining a discharge chamber having a foundry mixture discharge aperture at its lower end for discharging said foundry mixture;
- means for separately introducing into the upper end of said chamber a sand/binder mixture and a sand/catalyst mixture;
- a rotatable shaft extending downwardly and centrally through said chamber;
- means for rotating said shaft;
- a plurality of deflector blades fixed to said shaft, each such deflector blade being so shaped and positioned as to deflect downwardly flowing materials in an upward direction;
- and a plurality of mixer blades fixed on said shaft and shaped and positioned to propel said downwardly flowing materials toward the discharge aperture;
- said deflector blades and said mixer blades being arranged in groups comprising at least two mixer blades angularly spaced apart and at least one of said deflector blades;
- each said deflector blade in each of said groups being positioned below and angularly between the mixer blades in each said group.
5 more elements
Dependencies are inferred from the claim text.