Continuous mixing machine for moistening powdered material
AssigneeFunken Co., Ltd.
InventorHiroyuki Iwako
Life of this patent
Estimating the term…
Abstract
Powdered material is fed downwardly into the mixing chamber through a vertical feed pipe while liquid is fed into the chamber in the form of annular thin film descending along the inner wall surface of an inverted frusto-conical overflow structure arranged in a liquid tank in encircling relation to the powder feed pipe. Accommodated in the mixing chamber is an agitator disc having a large number of upwardly extending projections co-operable with stationary projections formed on the top wall of the chamber. An annular board is placed afloat on top of the liquid in the tank substantially coaxially with the tubular overflow structure to serve the purpose of preventing any adverse effect of surface disturbance upon the formation of thin liquid film.
Claims8
A continuous mixing machine for adding a predetermined proportion of liquid to powdered material including:
- a liquid reservoir tank (5) provided with a liquid inlet pipe (2) to be continuously fed with liquid therethrough, a tubular overflow structure (6) of inverted frusto-conical shape fixedly arranged in said liquid reservoir tank centrally thereof so as to enable the liquid fed to said liquid reservoir tank (5) to flow over the top circumferential edge of said tubular overflow structure (6) and down the inner wall surface thereof, a vertically extending powder feed pipe (1) adapted to receive powder from a conveyor tube or the like and opening at the bottom to the interior space of said tubular overflow structure, means defining a mixing chamber below and adjacent the bottom openings of the powder feed pipe and the overflow structure, a pointed circular cone (9) arranged in the mixing chamber vertically opposite to the bottom opening of said powder feed pipe (1) and adapted to be driven to rotate about its own axis to radially disperse the powdered material delivered from said powder feed pipe, an agitator disc (21) arranged in the mixing chamber of the machine to rotate with said pointed circular cone (9) and operable to mix the dispersed powdered material with the liquid entering the mixing chamber through said tubular overflow structure (6) along the inner wall surface thereof and a device for facilitating the overflow of liquid into said tubular overflow structure (6) in the form of thin film descending along the inner wall surface thereof, said device including an annular board (7) having a circular opening (71) of a diameter substantially equal to the inner diameter of the top end of said tubular overflow structure (6) and arranged around and closely adjacent to the top thereof for free vertical movement with the level of liquid in said reservoir tank (5) to reduce disturbance of the surface of the liquid adjacent to the top of said tubular overflow structure (6), thereby aiding formation of the thin liquid film down the inner wall surface of said tubular overflow structure.
A continuous mixing machine comprising:
- a tank having a wall and an inlet extending through said wall;
- an open top overflow structure disposed within said tank to provide an annular space between the tank wall and the overflow structure, into which space liquid entering the tank through said inlet can circulate, the overflow structure having an upper edge, a bottom outlet and an inner surface shaped to form a descending film of liquid which has circulated in said annular space and has risen to and overflown the upper edge of the overflow structure, wherein the inner surface of the overflow structure converges in the downward direction;
- material inlet means to admit into said tank and into said overflow structure a material of a type capable of being dispersed into said liquid;
- an annular board disposed in the tank for free movement up and down therein, said board being made of a material which is lighter than said liquid so as to move up and down with the level of the liquid in the tank, the board being closely adjacent the upper edge of the overflow structure when the liquid is overflowing said upper edge so as to reduce disturbance of the surface of the overflowing liquid and to thereby aid the formation of the descending film of liquid;
- first dispersing means adjacent said material inlet means to disperse and distribute the admitted material into the descending liquid;
- and
- second dispersing means disposed along the path of the mixture of liquid and the material dispersed in the liquid by said first dispersing means for further mixing said mixture.
Dependencies are inferred from the claim text.