Apparatus and method for perparing foundry sand

Details Apparatus and method for perparing foundry sand Apparatus and method for perparing foundry sand

B - Operations, Transporting

22

C

B22C 1/00 (2006.01) B22C 5/18 (2006.01)

Patent

CA 2440885

Apparatus and methods for preparing foundry sand mixes, using a pre-mix tank to pre-mix water and particulate bond material to make a water/bond slurry, then feeding the slurry to a mullor or other foundry sand mixer. The slurry is received in the mullor/mixer, mixed with return sand, and then discharged for use in making foundry molds. Preferably, the particulate bond material is added to the pre-mix tank as a falling stream of such particles, and a disperse spray of water is projected onto the particles with sufficient gentleness to not deleteriously distract the particles from their downward path.

L'invention porte sur un appareil et des procédés de préparation de mélanges de sables de fonderie comportant une chambre de prémélange d'eau et d'un liant particulaire où se forme une boue d'eau et de liant qui est ensuite transférée dans un malaxeur ou autre mélangeur de sables de fonderie où elle est mélangée au sable de retour puis extraite en vue de la préparation de moules de fonderie. Le liant est de préférence ajouté en courant tombant tandis qu'une pulvérisation d'eau en disperse les particules avec une énergie suffisamment faible pour ne les dévier de leur trajectoire descendante.

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