Process and apparatus for the continuous preparation of a mixture for foundry molds or the like, with formation of a premix
AssigneeSociete d'Applications de Procedes Industriels et Chimiques S.A.P.I.C.
InventorGerard Y. Richard
Life of this patent
Estimating the term…
Abstract
A process and apparatus for the continuous preparation of a molding mater comprising a granular and/or pulverulent charge agglomerated by a binder-hardener system are disclosed. An intimate and homogeneous pre-mix is formed by malaxation of the charge and only one of the binder-hardener system components, to the mixture is then added the second binder-hardener component into a thin film malaxation apparatus, the mixture is malaxated as a thin film for a few seconds and then is discharged at its point of end use.
Claims11
A method of continuously preparing a mixture of materials comprising a granular and/or pulverulent charge which is agglomerated by a binder-hardener system, comprising;
- forming an intimate and homogeneous pre-mix by malaxating the charge and only one of the two constituents of the binder-hardener system;
- then introducing into a thin film malaxating apparatus the second constituent of the binder-hardener system so as to bring this second constituent into contact with the pre-mix, malaxating the entire final mixture of the pre-mix and the second constituent in the form of a thin film formed on the malaxating surface of said apparatus by centrifugal forces imparted to said mixture in said apparatus, for a few seconds, and finally discharging the final mixture immediately to its point of use.
A method of continuously preparing a mixture of materials comprising a granular and/or pulverulent charge which is agglomerated by a binder-hardener system, comprising;
- forming an intimate and homogeneous pre-mix by malaxating the charge and only one of the two constituents of the binder-hardener system;
- then introducing into a thin film malaxating apparatus the second constituent of the binder-hardener system so as to bring this second constituent into contact with the pre-mix, malaxating the entire final mixture of the pre-mix and the second constituent in the form of a thin film, for a few seconds between a cylindrical or conically tapered inner wall of a malaxation zone in said malaxating apparatus and a plurality of hammers respectively mounted on arms extending radially from a rotating drive shaft extending coaxially in said malaxation zone, said hammers having a clearance with said inner wall of only a few millimeters as they orbit upon rotation of said shaft to provide thin film malaxation of the resultant mixture, and finally discharging the resultant mixture immediately after said malaxation of a few seconds to its point of use.
Dependencies are inferred from the claim text.