|Publication number||US2514126 A|
|Publication date||Jul 4, 1950|
|Filing date||Dec 8, 1949|
|Priority date||Dec 8, 1949|
|Publication number||US 2514126 A, US 2514126A, US-A-2514126, US2514126 A, US2514126A|
|Inventors||John J Fischer|
|Original Assignee||Patterson Kelley Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (7), Referenced by (26), Classifications (10)|
|External Links: USPTO, USPTO Assignment, Espacenet|
July 4, 1950 i J. J. FISCHER 2,514,126
BLENDING 0R MIXING APPARATUS Filed Dec. 8, 1949 Patented July 4, 1950 BLENDING on MIXING APPARATUS John J. Fischer, East Stroudsburg, Pal, assignor to The Patterson-Kelley 00., Inc., East Stroudsburg, Pa.
Application December 8, 1949, Serial No. 131,771
This invention relates to material mixing or blender devices for use in various industries, and more particularly to such apparatus as is intended for use in blending wet or dry materials such as are ordinarily difficult to admix.
Whereas, in the prior art various type mixers or blenders have been developed for use in connection with the purposes aforesaid, and whereas such prior art mixers and blenders have comprised variously shaped tumbler devices with or without internal baffies or agitators or the like; the devices of the prior art have been efficient only to limited degrees for the purposes intended, especially when operating upon differently sized materials or materials of substantially different specific gravities.
It is an object of the present invention to provide an improved rotating or tumbler type blending mill, comprising a casing structure of novel shape which when rotated tumbles the contents thereof in novel manner so as to provide more efiective blending of the materials therein.
Another object of the invention is to provide a blending mill for the purposes aforesaid which is of structurally simple and rugged form, and
which may be fabricated in accord with a novel and economical manufacturing procedure 7 Another object of the invention is to provide a blending mill for the purposes aforesaid which operates to provide improved efiiciency and economy in material blending operations.
Other objects and advantages of the invention will appear from the specification hereinafter.
In the drawing:
Fig. 1 is a side elevation of a blending mill of the invention, with a portion broken away to show the interior and the unloading portion in section;
Fig. 2 is an end elevation of the device; and
Figs. 3 and 4 are diagrammatic illustrations of the material blending flow paths therein at difierent phases of the tumbling operation of the mill.
As shown in the drawing, the blending mill of the invention may be constructed to comprise in side elevation an essentially V-shaped container comprising opposite leg portions l0, [2
which are of frusto-cylindrical form relatively disposed with their cylinder axes intersecting. Thus, the plane of juncture between the cylinder legs l0, I2 is disposed at an acute angle to the cylinder axis of each leg, and the line of juncture connection between the opposite leg portions is effected by suitable means,--such' as by 7 Claims. (Cl. 259-81) 65 to a conduit 40 for introduction of liquid or welding as indicated at M. The outer ends of the cylinder portions l0, l2 are closed by suitable end plates such as are indicated at l6, l8, respectively.
The container is fitted with aligned brackets 28 extending into trunnion bearing devices 22 at opposite sides of the unit; the trunnion bearin devices being mounted upon. base supports 24, 26 so that the trunnion axis is disposed substantially horizontally and at the desired elevation above the mill building floor line 21. Means for rotating the unit about the trunnion axis may be provided in any preferred form, such as for example an electric motor 30 geared to one of the trunnion shafts as through means of a bevel gear speed reducer 32 and flexible coupling 34. However, it will be appreciated that the unit may be rotated by any other suitable power transmission means, such as a spur gear or chain or belt drive arrangement in connection with any suitable power source. I
Material inlet and outlet arrangements for the V-cylinder unit may be provided of any preferred form, and may for example comprise as shown in the drawing a material inlet port and detachable cover plate device 34 in either or both of the end plates of the cylinderlegs, and a blended material outlet device in any suitable form such as a collar 36 at the apex portion of shown in Figs. 1-2, one or both of the cover plates 34 maybe removed and material to be blended may'then be loaded into the mill as from chutes leading from bins or elevators discharging thereabove. Then, with the covers in place the mill is rotated for sufiicient time to provide the desired blending of the contents whereupon it may again be stopped in the attitude thereof shown in the drawing and the valve 38 opened to permit drainage of the processed material from the mill into any suitable receptacle or conveyor therebelow. However, it will be appreciated that the filler and discharge openings and suitable cover devices therefor may be readily provided at any other positions on the unit in lieu of the arrangements illustrated, as may be preferred in view of material handling considerations externally of the mill. For example, as shown in Fig, 1, the trunnion shafts may be of hollow form and connected as solid materials therethrough when the mill is stationary or rotating.
It is a particular feature of the invention that the material container is mounted upon trunnion bearings providing for rotation of the unit about an axis such as is designated at 42 which extends obliquel to the directions of extension of the container parts, and in the case of the V-cylinder unit type construction as shown in the drawing, the axis 42 is disposed substantially normal to the plane of intersection of the two cylinder leg portions of the unit. Hence, upon rotation of the unit about the trunnion axis 42 the loose material within the unit is tumbled alternately toward the closed end portions of the cylinder legs as shown diagrammatically in Fig. 3 and toward the apex portion of the container as shown in Fig. 4. For example, as the container rotates so as to bring the apex portion thereof to an elevation above the closed leg end portions, the loose material within the apex portion of the container is thereby tumbled over and directed to slide downwardly toward the crotch or ridge portion defined by the juncture of the cylinder legs. This ridge portion then opcrates to split the downwardly sliding load into two parts and to'divert them to flow in obliquely lateral and downward paths toward the closed ends of the cylinder legs as pictured in Fig. 3. Then. as rotation of the unit continues, the closed end portions of the unit are carried up again into position at an elevation above the apex portion ofthe device, whereupon the loose material then occupying the two closed end Iportions of the unit are tumbled over and commence to slide downwardly in obliquely convergent paths. as pictured in Fig. 4.
Thus, portions of the load moving toward the apex portion of the unit simultaneously from opposite leg portions thereof drive into and through each other o as to thereby eiiect an improved blendingoperation. Hence, the operation of the device may be described as alternate mixing of the load materials into one batch and then splitting of themixture into two batches and subsequently remixing it by means of the convergent impingement actions of the sliding streams of the load materials. Furthermore, incidental to operation of the device as above described, as viewed endwise of the mill the load materials are given both vertical and lateral sliding motions as well as tumbling or overturning and folding movements of elevated portions of the load rela tive to portions of the load still remaining at lower elevations. Hence, in the case of the present invention the above described lateral displacements and alternate load splitting and remixing actions are obtained in combination with constant tumbling and folding and sliding actions of the load in response to rotation of the unit. It is also noteworthy that the V-cylinder mill as shown in the drawing is symmetrical as viewed in Fig. 1, whereby the lateral displacements of material therein incidental to the load splitting and remixing actions referred to hereinabove are accompanied by balancing out of the load reaction forces against the container walls. Hence, the mechanism is free from unbalanced load peak effects; and it will also be understood that the trunnion mounting device will be preferably arranged so that the trunnion axis extends through the casing unit at approximately the end view position of thecenter of gravity thereof, to minimize eccentric loads on the mounting and driving mechanisms.
Thus, it will be appreciated that the invention provides a blending mill which is of novel shape so as to cause loose material therein to be tumbled and slithered about therein in novel manner and with improved blending results without corresponding increase of power consumption. It will of course be understood that various baflie devices or the like may be installed interiorly of the material container, if preferred, in connection with the handling of any specific material or'problem; and that employment of such bafiie devices would provide additional local agitation of the material load as controlled generally by the shapeof the casing unit as explained herein'above.
It is another feature of the invention that the V-cylinder casing structure is particularly adapted to be easily and economically fabricated by: presently standard shop methods, because as a preliminary to the final fabrication a single metal cylinder may first beconstructed and then cut in two diagonally intermediately of its ends, so as to at once provide'the two cylinder leg portions l0, 12. The leg portions are then reassembled into the relative position shown in the drawing, and thenfastened together as by welding or riveting or the like. Hence, the casing structure is simply and economically fabricated by a minimum of operations and without waste of material. Whereas, the drawing illustrates the material container portion of the device of the invention to comprise divergent leg portions which are ofcircular'crosssectional form, it will be'understood that the leg portions may be fabricated to any other preferred sectional form such as to a modified circular or polygonal form;
as long as the legportions are relatively arranged so as to provide the V-shaped configuration in side view whereby the novel material blending action is obtained as explained hereinabove.
Although only one form of the invention has been shown and described in detail, it will be apparent to thoseskilled in the'art that the invention is not so limited but that various changes may be made therein without departing from the spirit of the invention or the scope of the appendedclaims.
1. A blending apparatus comprising in one view a generally V-shaped container having an apex portion and side leg portions diverging therefrom, and means for mounting said container for rotation about an axis lying within the plane of the axes of said leg portions but extending in a direction transverse to said axes.
2. A blending apparatus comprising in side elevation a generally V-shaped container having an apex portion and cylindrical side leg portions having their cylinder axes disposed in diverging directions, and means for mounting said container for rotation about an axis lying substantially inv the plane of saidcylinder axes but extending transverse to said cylinder axes of said leg portions.
3. A blending apparatus comprising a generally V-shaped container having a closed apex portion and closed end side leg portions diverging therefrom, and means for mounting said container for rotation about an axis extending in the plane of the axes of said leg portions.
4. A blending apparatus comprising a material container having an apex portion and hollow side leg portions divergent therefrom, means for mounting said container for rotation about a rotation.- axis in the plane of the axes of said leg portions, and means for rotating said container about said rotation axis.
5. A blending apparatus comprising a generally V-shaped container having an apex portion and elongate side leg portions diverging therefrom, means for mounting said container for rotation about an axis lying within the plane of the axes of elongation of said leg portions but extending in a direction obliquely transverse to said axes, and a material loading opening and detachable cover means therefor at one end portion of said container.
6. A blending apparatus comprising a material container having an apex portion and elongate hollow side leg portions divergent therefrom, means for mounting said container for rotation about an axis in the plane of the elongation axes of said leg portions, means for rotating said container about said axis, and detachable cover means at one end portion of said container.
'7. A blending apparatus comprising in side elevation a generally V-shaped container having an apex portion and hollow elongate side leg portions having their elongation axes disposed in diverging directions, and means for mounting said container for rotation about an axis obliquely intersecting said elongation axes of said leg portions.
JOHN J. FISCHER.
REFERENCES CITED The following references are of record in the file of this patent:
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|International Classification||B01F9/00, B01F9/04|
|Cooperative Classification||B01F9/0005, B01F2009/0089, B01F9/04, B01F9/005|
|European Classification||B01F9/00P2B16, B01F9/00D, B01F9/04|