US2323149A - High speed mill - Google Patents

Description

June 29, 1943,

W. A. M LEAN HIGH SPEED MILL Original Filed March 31, 1936 2 Sheets-Sheet 1 FIG.

W/LL/AMA. McLEAN June 29, 1943. w. A. M LEAN HIGH SPEED MILL Original Filed March 31, 1936 2 Sheets-Sheet 2 g wuwrvkw WILL/AM A McL EAN Patented June 29, 1943 UNITED STATES PATENT 2,323,149 M -HIGH SPEED MILL f 7 William A. :McLe an, Geneva, 'assignor to Geneva Processes, Ina, Geneva, N. Y., a-cr-. poration of New York t (lriginalrapplication January 5,1938, Serial Not.

' I I 183,549, which isa division of application Serial No. 71,932, March 31, 1936. Divided and this application June 2, 1941, Serial No. 396,336

4 Claims. (Gl; 259-8) This invention relates to mixing devices, and more particularly to devices for mixing emulsions such as mayonnaise, salad dressings and insecticides. 7

The present application is a divisionof my If desired, interlacingdisturbing elements, such as interrupting circular vanes or pinssuch as disclosed in my co-pending application,;- Serial No. 396,337, filed June 2, 1941, may .be usedrin connection with the mills disclosed in this apcopending application, Serial No. 183,549, filed plicatillm-v ,v 1 a January 5, 1938, now Patent 2,248,886, dated July In the drawings:. 1941, Which S a division of Serial Figure 1 is a view in longitudinal section ,of filed March 31, 1936, now Patent 2,125,455, dated one form of the invention, Aug st 1 i Figure 2 is a view taken along line 2,-2' of P ObJect of thls mventlon 1 to .P a Figure 1, looking in the direction of the arrows. mixmg device capable of r Producing a Figure. 3 is a sectionalview showing the. rotor colloid mixture of the desiredvhomogeneityconstruction of another form of the invention.

Another Object of this invention is to provide Figure 4 is a sectional view showing the rotor a high Speed mill which is Simple in construction construction of a third form of the invention. which a readily P adjusted Q- Figure 5 is a sectional: view showing the rotor a product havmg the deslred charactensticsf construction of the fourth form of the invention.

Still-another object of this invention is to pro- In order tofllustrate the invention, f ur. types, tide? mixing device having a mixing chamber of mixing chambers and two types of rotors have into which a rotor extends, thev rotor being .cornbeen shown, in drawings f which are P of segments ot-pl'ogressively increasing capable 'of carrying out the principal objects of Slze- 1 ii the invention. All of the-types of mixing cham- A'turther OPJecb t 'f provlde bers disclosed may be interchangeablyjmounted almlxing devlcerhavmg chamber into on the mill supportingstructure disclosed in which a rotor extends, the rotor being provided: Figures 1 dg; with means which serve to give the material a Shown in Figure 1, the u r n Strucbeating before leaves th t 1' ture, generally designed by the numeral I, is

With these and otherobjects in view, t'his-ini e with a base 2- which is te by t t embraces hmadly tttteieonceptt of: the end plate 3 of an electric motor and carries viding a mill having a mixing chamber and a o Structure rotor extending into the chamber, the mixing Thflnill u' is o provided h a Chamber belttg P ovlded f means to e the inclined surface '5 positioned intermediate a'i'pair mammal whlih 15 f hemmed a Small Stream of side walls which combine with, the inclined upoh the Center the rotor Surlface surface 5 to: form a chute 6. The side walls three .tohhs ot the thvehttoh the t t converge at the foot of the inclined surface 5. to provided with means bywhich the material form ajdiScha-drge Spout 1 1 g ghtehhgbttfte mth i to shpretimihary The-front of the chute 6 isv partially closed by eating e-ore it passes e'ween em or and stator surfaces. In the fourth form of the infizg i g t t h g i g g gg g gz vention the material passes between one set of 40 threaded tuds m carried b the membe Th rotor and stator'surfaces before it is subjected to H d S f C p 5 1 d the beating and then passes between a second the he tut 1S p 0V1 t e set of rotor and stator surfaces before it leaves ggg g t i or coohhg may the mill.

The means for feeding the material into the The shaft of thettecthc motor is coupled mill is important because it enables the'stator at Shaft t4 t h ttnves h t member surface to be covered with the incoming material The Shaft M 15 Journahed as mdwated at without danger of overloading the mill, and the It and H m sleeve t P t P' beating of the material eliminates the necessity the Support Structure extendmg' mw'the of'thor h y mixing the materials before they chute 1 are introduced to the mill and also eliminates The upper portion of the support I defines an the possibility of the ingredients separating dur aperture l9 around the periphery of which acoling the mixing process. These jandother aqlar 20-, held in" position by 'cap' screws 21",: is vantages will be subsequently-described in more mounted. Adjusting boltsg22,';carriedbybrackets complete detail.

23' which are mounted on supporting structure" I;

by means not shown to a suitable supply of cool ing or heating fluid and which surrounds'a central mixing chamber 29 of frusto-conical shape formed by walls 30. The head 2'Iis provided with a flange 3| which rests on the upper portion ofthe annulus 24 and is secured to the collar 20 by means of studs 32 provided with wing nuts 33.

The upper portion of the head 21 is provided with a centrally located aperture 34, the periphery of which is threaded to engage the exteriorly threaded extension 35 of a hopper funnel 36. Theaperture 34 is of anysuitable size but it is substantially smaller than the diameter of the rotor I5 and is positioned directly above the center of the rotor in order to direct the material directly upon the center of the upper surface of the rotor,

The clearance between the rotor |5and the walls 30 of the mixing chamber 29 is regulatedby raising and lowering the head 21 by changing .the height of the supporting annulus 24. After the proper adjustment has been made, the wing nuts 33 are tightened to hold the head 21 in fixed position.

The rotor l5 extends into the mixing chamber 29 and consists of two frusto-conical shaped segments 3'! and 3B which are mounted in superposed relation. The lower segment 37 is of large diameter than the upper segment 38. I s The construction of the rotor I5 is an important feature of the invention because it imparts anincreased flexibility to the operation of the mill. In this connection it should be noted that, when the mixing chamber-29 is positioned in a manner shown in Figure 1, the upper segment 38 acts as a means to beat the emulsion entering the chamber from the funnel 36 before it passes between the working surface of the segment 31 and the walls 30. However, if it becomes advantageous because of the'pa'riti-cular material being 1 treated, the head 21 can be lowered in the manner previously described, thereby lowering the mixing chamber 29 and bringing the walls 30 into closer engagement with the working surfaces of both v the segment 31 and the segment 38. In this position the segment 38 acts not only as a beater but as an additional agent for emulsifying the materialr r Ordinarily, in actual practice after the head 21 has been adjusted so as to provide the proper clearance between the working surfaces of the rotor I5, the mixture is poured into thefunnel 36 until a sufficient quantity has entered the mixing chamber 29 to completely cover the surface of the rotor. Under some conditions, if desired the entire mixing chamber 29 may be filled with the rough mixture before the mill is started. However, usually only suflicient material is admitted to cover the upper surface of the rotor segment 38. I

During operation the material entering the mixing chamber through the restricted aperture 34 comes in contact with the segment 38 and is subjected to a beating and mixing action by being thrown against the walls 30 of the mixing chamber 29. After a thorough beating and mixing, the material passes between the working surfaces of the lower segment 31 and the wall 29 and falls upon the inclined surface 5. After flowing down the surface it is discharged through the aperture I.

, In connection with the operation of the mill,

it should be noted that the relatively smaller area of theaperture 34 compared to the upper surface of the segment 38 of the rotor l5 permitsonly a restricted quantity of the material to be fed to the mill and directs all this material upon the rotor surface. 'The frusto-conical shape of both the rotor l5 and the mixing chamber 29 is also admirably suited for this type of mill and the adjustable feature of the head 2'! allows the working surface of the mill to be increased by lowering the frusto-conical shaped mixing chamber downwardly towards the rotor l5.

In Figure 3 is shown a head 40 which may readily-be substituted in the mill just described in place of the head 21. The head 48 is similar in construction to the head 21 and is provided with the previously described fluid chamber 28, flange 3| and inlet aperture 34 in which may be mountvided with a fluid chamber 28, flange 3| and inletz34. The rotor |5 is identical to that described in Figure 3, being composed of a lower segment 31 and an upper segment 38, but the extremities of the wall of the hemispherically shaped mixing chamber 5| are provided with a working surface.52 which lies in the same plane as the plane of the working surface of the frusto-conical shaped segment 31.

' This type of head is desirable for use when the ingredients must be thoroughly blended and reduced to colloidal size. Due to the construction of the working surfaces, the mixture fed into the mill is subjected to an extensive beating by the segment 38 before it passes between the working surfaces.

; In the form of the invention shown in Figure 5, the head is provided with the previously described fluid chamber 28, flange 3| and inlet 34. The mixing chamber 6|, however, is formed in .two sections, the upper section 62 being frustoconical in shape and the lower section 63 being hemispherical in shape. The rotor 64 is comprised of three segments 65, 66 and 61 which are superposed and each of which is frustoconical in shape. These segments progressively decrease in diameter, the upper segment 61 having the smallest area.

In the position of the head 60 shown in Figure '5, the segment 61 forms a working surface with the lower portion of the upper frusto-conical chamber 62 and the lower segment forms a working surface with the lower portion of the .hemispherically shaped mixing chamber 63. In this position of the rotor 64, the material enters .the upper mixing chamber 62 and after passing through the working surface formed by the segment 6! it is beaten and thoroughly mixed by the segment 66 by being thrown against the sides of the hemispherically shaped chamber 63. It then passes between the working surface formed by the segment 65 and the extremities of the wall of the lower chamber 63. The working surface of this mill can be decreased by slightly raising the head 60.

Therefore, the mill head 60, by being provided with a frusto-conical mixing chamber 62 and a hemispherical mixing chamber 63, has the advantages both of the mill head disclosed in Figure 2 and those disclosed in Figures 3 and 4. Moreover, the rotor in addition to being provided with two working surfaces is also provided with an intermediate beating and mixing surface.

While for purposes of illustration the preferred structure which constitutes the invention has been shown and described, it is apparent that various changes in the details of the construction can be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the appended claims.

I claim:

1. A mixing and emulsifying mill comprising a mixing chamber having walls, the upper portion of said mixing chamber being frusto-conical in shape and the lower portion being hemispherical in shape, a rotor extending into said mixing chamber, said rotor progressively increasing in size from top to bottom and being composed of three frusto-conical shaped segments having flat upper surfaces and sloping sides, the upper of said segments forming a working surface with the walls of the frustoconically shaped portion of the mixing chamber and the sloping surface of the lower segment forming a working surface with the walls of the hemispherically shaped portion of the mixing chamber, and said intermediate segment being spaced from the walls of the hemispherically shaped portion of the mixing chamber to serve as a beater.

2. A mixing and emulsifying mill comprising a mixing chamber having walls, the upper portion of said mixing chamber being frusto-conical in shape and the lower portion being hemispherical in shape, a rotor extending into said mixing chamber, said rotor progressively increasing in size from top to bottom and being composed of three frusto-conical shaped segments having fiat upper surfaces and sloping sides, the upper of said segments forming a working surface with the walls of the frusto-conically shaped portion of the mixing chamber and the sloping surface of the lower segment forming a working surface with the walls of the hemispherically shaped portion of the mixing chamber, and said intermediate segment being spaced from the walls of the hemispherically shaped portion of the mixing chamber to serve as a beater, and the upper portion of said mixing chamber defining an opening of restricted area positioned above the center portion of the said rotor.

3. A mixing and emulsifying mill comprising a mixing chamber having walls, the upper portion of said mixing chamber being frusto-conical in shape and the lower portion being hemispherical in shape, a rotor extending into said mixing chamber, said rotor progressively increasing in size from top to bottom and being composed of three frusto-conical shaped segments having flat upper surfaces and sloping sides, the sloping surface of the upper of said segments forming a working surface with the walls of the frustoconically shaped portion of the mixing chamber and the sloping surface of the lower segment forming a working surface with the Walls of the hemispherically shaped portion of the mixing chamber, and said intermediate segment being spaced from the said hemispherical shaped portion of the mixing chamber to serve as a beater, the upper portion of said mixing chamber defining an opening of restricted area positioned above the center portion of the said rotor, and the said mixing chamber being adjustable vertically so that the distance of the upper surface of the rotor from the said opening may be regulated.

4. A mixing and emulsifying mill comprising a mixing chamber having walls, the upper portion of said mixing chamber being frusto-conical in shape and the lower portion being hemispherical in shape, a rotor extending into said mixing chamber, said rotor progressively increasing in size from top to bottom and being composed of at least three frusto-conical shaped segments having flat upper surfaces and sloping sides, the sloping surface of the upper of said segments forming a working surface with the walls of the frusto-conically shaped portion of the mixing chamber and the sloping surface of the lower segment forming a working surface with the walls of the hemispherically shaped portion of the mixing chamber, and said intermediate segments being spaced from the said hemispherical shaped portion of the mixing chamber to serve as a beater, the upper portion of said mixing chamber defining an opening of restricted area positioned above the center portion of the said rotor, and the said mixing chamber being adjustable vertically so that the distance of the upper surface of the rotor from the said opening may be regulated.

WILLIAM A. McLEAN.

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