US2604270A

US2604270A - Machine for grinding or refining paint, cellulose, chocolate, and other substances

Info

Publication number: US2604270A
Application number: US91164A
Authority: US
Inventors: Mcintyre John
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-05-10
Filing date: 1949-05-03
Publication date: 1952-07-22
Anticipated expiration: 1969-07-22

Description

4July 22, 1952 w J. MGINTYRE 2,604,270

MACHINE FOR GRINDING 0R REFINING PAINT, CELLULOSE, CHOCOLATE, AND

OTHER SUBSTANCES Filed May 3, 1949 j 4 Sheets-Sheet l FINING 1E, AND

vJuly 22, 1952* J. MCINTYRE MACHINE GRINDING OR' RE PAINT, C ULOSE, CHOCOLA' OTHER SUBSTANCES 4 Sheets-Sheet 2 Filed-May 5, 1949 H July 22, 1952 J 'MCINTYRE 2,604,270

MACHINE F OR. GRINDING OR REFININ PAINT, CELLULOSE, CHOCOLATE, AND

OTHER SUBSTANCES Filed May a, '1949 4 sheets-sheet 5 `I uly 22, 1952 GRINDING OR REFINING PAINT, CELLULOSE', CHOCOLATE,l AND OTHER SUBSTANCES .LMSINTYR v 2,604,270 MACHINE FOR Filed May 3, 1949 4 Sheets-Sheet 4 `zatented July 22, 1952 PAINT, CELLULOSE, CHOCOLATE, OTHER SUBSTANCESy l AND John McIntyre, Portobello, Scotland Application May 3, 1949, Serial No. 91,164

In Great Britain May 10, 1948 8 Claims.

This invention'has reference to machines for grinding or rening paint, cellulose, chocolate and other substances and relates particularly to such machines of the type comprising av cylinder,

^ the inner face of which is provided with stationary longitudinally extending iixed grinding bars, and a rotor mounted on a driven shaft and carrying resiliently loaded longitudinally extending grinding bars, which, when rotated co-operate with the stationary grinding bars.

One object of the invention is to provide improvements in grinding machines of the type set vforth whereby a better grinding action will be obtained by the co-operation of the stationary grinding bars and the resiliently loaded grinding bars.

Another object of the invention is to provide improvements whereby the material being ground is fed to the grinding bars.

Preferred embodiments of the invention will now be described with reference to the annexed drawings wherein:

.Figure 1 is an elevation of one construction of machine in accordance with the invention, the

' front cover of the cylinder being removed,

i Figure 2 is an end elevation thereof showing the cylinder and upper half of the rotor in section,

Figure 3 shows to a larger scale an elevation of part of the rotor, the ends of. two flexible spring bands and the means by which the loading is transmitted to the said two ends,

Figure 4 is an inverted sectional plan View on the line 4-4 of Figure 3 of the said means .by which the loading is transmitted to the ends of vthe spring bands,

Figures 5 and 6 are views corresponding to Figures l and 2 respectively of a machine in accordance with the invention but showing alternative means by which the loading can be adjusted, and

Figures 7 and 8 are further views corresponding to Figures l and 2 but showing a still further alternative means by which the loading can. be adjusted, the aforesaid plates being omitted and only the uppermost and lowermost fixed and rotating grinding bars being shown in Figure 8.

In the various views like reference numerals `denote the same or corresponding parts.

`As shown in the drawings the improved machine embodies a jacketed cylinder I0 provided with end covers having charging hoppers Il. A suitably located sluice valve or other means, not shown, is provided through which the ground or refined material can .be withdrawn. The inner surface of this cylinder is formed of lining bars l2 extending from end to end of the cylinder. Said bars, which lie closely adjacent to each other, are provided with rounded inner faces and may be in the form of a lining as set forth in my U. S. A. patent application Serial Number 90,382.

Extending axially into the cylinder is a driving shaft I3 on which issecured a rotor I4 in the form of a wheel having on its periphery open ended radial slots l5, see Figure 3. Said slots are shown arranged in groups at regularly spaced distances apart, but they may extend completely round the rotor or be otherwise arranged.

Fitted into saidslots are the grinding bars I6, the fit being such that they can partake of a radial movement in the slots.

Said bars may be of any section found suitable; for example they may be of round section, or have ilat sides and grinding rounded ends.

The slots are such -that the grinding bars tted therein are so positioned that one end of each is slightly in advance of the other end whereby the said bars impart or aid in imparting a longitudinal flow to the substance being ground or rened in addition to the usual rotary iiow.

Carried by the rotor at the rear of each group of bars i6 is a plate Il lying at such angle to the adjacent bars I6 that it forms therewith a pocket in which ythe material being ground is caught and from which it passes through the openings between the said bars. Said plates, like the bars, are so set that one end thereof, the leading end, is in advance of the other. Flexible pressure bands I8, conveniently of spring steel, are provided -to bear on the inner faces of the grinding bars I6. Each band is formed of two substantially semi-circular segments. To the end of each segment is secured one leaf I9 of a hinge member the other leaf, which may be made of spring steel, constituting a strut |92. The two struts connected to adjacent ends of the spring segments are mounted on a pivot pin 20 carried by a bracket 2l having two lugs, see particularly Figures 3 and 4. The lugs of the two upper brackets 2l straddle the ends of a cross bar 22, and the lugs of the two lower brackets straddlevthe ends of a second cross bar 23. Said cross bars, which pass through slots in the rotor, are pivotally connected towards their centres to rods 24 supplied by guide lugs 25 of brackets secured to the rotor.

In the arrangement shown in Figures 1 and 2 the inner ends of the rods 24 are screw threaded as at 26 and nuts screwed thereonbear on the the rods 2 4 toan internallythreaded member 28 threaded 12ers caused totravei towards or inner ends, the "pressure `,excited between the co-oper'ating grindingbars by locatedfwi-thin' a 'cy1inder 31 to which 'ui d can It will therefore be appreciated said nuts the rods 24 can be such motion being transmitted I9 to inner lugs 25. that by turning moved radially, through the cross bars 22 and the struts the ends of the semi-circular spring bands.

When in use material introduced into the machine 'is' ground by the co-operation of the fixed grinding bars I2 of the cylinder with the `groups of rotating bars I6 of the rotor, all of which bars i6 are constantly urged radially outwardly by means of the spring bands I S.

Should it be desired to alter the pressureV eX- erted by the bars I6 or the bars I2 the aforesaid nuts are turned to move the rods 24 radially.

When said rods are moved radially` outwards-the l i spring bands bear harder on-the grindingbars I6 all of which then bear harder on the xed bars.

Now should the grinding bars carried by the rotor become worn they may be Slipped'froin the slotted Wheel and reversed so that the faces which wereforrnerly innermost now become the grinding faces.

yFurther where it may be necessary to replace said'bars the old ones can `be "*.slip`p'ed out and new ones substituted therefor.

' In the construction shown in Figures 5 and 6 are connected by means of links 2l on a screw threaded spindle v29. f' This spindle is providedA at one end thereof with a headwhich f `ts'within a recess in the end v:of theshaft I3, a retaining plate '39 on the end of the shaft preventing relative longitudinal movement of the spindle. The other end of this Yspindle has fast thereon a disc 3l provided with'two holes therein.'

Arranged to engagewith the saidY holes are pins 32 carried by a discSSrfast on aspindle' The latter is in axial'alignr'nent withthe'shaft and V its outer end which extends through' ythe front cover of the lcylin'd'er,"`is provided with' a hand wheel 35.

To alter Ythe'pressureexerted by the bars I6 or the bars 'i2 lthe spindle 34 is moved axially inwards to bring-the said two' pins Vinto register withtne' hoies in 'the dise s l. 'jspindie se is 'then' rotated and a vcorresponding 'movementtra'nsmitted to the screw spindle so thatltheimember Y Y 4 awayfrorn the rotor. The movementfof said memberY is transminedtliroufghftiie links aise tnatfthe rods' 2tl are moved radially;

Thel rods in turn through the'cross'bars' and struts and spring lbands increase or decrease the pressureeerted by the rotating grinding bars onthered bars.

In' lthegarrangement* shown in`Figures 'land 8 the rods" 24, 'whicl1 fare 'screw threadedat ltheir can be forceduoutwa'rds to increase means of 'two opposed rams'l 3E ,plunger' 33 which works within a cylinder 33.

When fluid is forcedinto'jthe"cylinder @e Vthe rams are 'forced apart a nd tl ie' i f o dsV 24 turn are forced radially outwards to increase the pressure between"v cocperating vgrinding' bars. l"When the Yrods are forced apart' to impart Ithefrequisite pressure 'they may be lockedr in such -position by bearing on the" inner lugs I claim: ,j l.' A machine ofthe typeset` forthjhaving a lrotor provided with open ended radial slots-, 'grindingbarsntted in said slots so-as to be capable of varcuate sections and bearing on said bars, and

4 an outward radial movement therein and at least one resilient flexible band bearing on said bars and urging them outwardly in and with respect to their slots.

2. A machine of the type set forth having a rotor provided with open ended slots, grinding bars fitted in vrsaid slotsy so' as'to be capable of ya radial outward movementtherein, alt least one ilexible band extending circumferentially of and within the rotor, said band being formed of inieansconncted to the adjacent free ends of the arcuate sections by which the sections are rotor provided urged outwards.

l 3. A- machine of .the type set forth having a with open ended radial slots,

Y grinding barsr fitted in said slots so as to be capable of a radial outward movement therein, at

least one resilient flexible band bearing on said bars to urge 'them outwardly in their slots and plates carriedby the rtor'an'd'positioned radially inward from'fthe said'barsfthe'leading'edge of each'plate vbeingffurther from-the barsthan the *trailing edge so'that,' wheny the `machine 'is in'use, theunate'riall being 'ground' isv trapped and guided "between Ithe grinding bars by Athevsaid plates.

' grinding'barsy tted in 'said "slots, "two resilient 4." A 'machineof the type" setl forthA `having a rotor vprovided 'with y'open lvended radial slots, grinding bars fitted 'in said' slots,v two"r`esilient bands formed'of 'arcuate'sections and bearing on said bars, radial'r'ods carried "by" the' rotor* and capable 'of` radial adjustment, lcro'ss 'bars carried ATbythe o'uter'en'dsf'of said radial rods, a pair of "strut 'members secured to each end 'of each-'cross bar'and adjacent endsoftwoof lsaid arcuate sections and means by which Ithe radial rods can be adjusted radially 'to regulate the lpressure eX- ertediby' the bands on the" bars.

5. A machine of the'type set" forth having a rotor provided 'with open* ended radial slots,

bands formed of arcuate sectionsand'bearing vbn'saidbars; radial rods Ycarried by the rotor and capable" of "radial adjustment, cross bars carried by the'outer ends-of lsaid radial 'rods,'and a` pair "of resilientsteel'strutmembers secured'to each Vend'of `each lcross vbarand` to adjacent 4end's of two of said arcuate sections and means by which the radial rods'can be adjusted Aradially-'toregu- "late Athe-'pressure yexerted by the'bars.

6; A" machineof'the' typef'set forth' having a rotor provided "with open ended radial slots,

grinding"bars""fitted"in' 'said slots, l two flexible "bands formed of arcuatesections'and bearing on said barsgradial' rods c'arriedvby the rotor and capable of radial adjustment, cross-'bars'narried by Athev outer ends of said radial rods,V apair o f strutrneinbers secured to Yeach`end'of each'cross bar, each pair'being" connected toadjacent ends oftwoarcuate sections, andV means by which' said rods can be adjusted radially to regulate the 'force by whichv the said bars are urged outwards.

'7.` A machineof the type4 set forth having a rotor provided with open Yended* radial slots,

'bands' formed"4 cf" arcuate sections and bearing grindingbars fitted insaid slots, two ilexible onA said bars,` radial rods carried by theI rotor and capableofradial adjustmentycross bars carried bythe outer 'ends of said radial'rods'. a lpair of strut members secured to each-end of each "c'rossban'eachfpair being-'connected to adjacent ends of two' arcuate sections; a screw threaded "'spindlein laxialV alignment 'with the' axis ofV the rotor and `mounted for free rotation-with respect "'to"`tberotor,` aA collar'screwed on 'said spindle,

links connecting said collar to the radial rods and manually operable means to rotate the spindle so that the collar is moved axially thereon to regulate the pressure of the bands on the bars.

8. A machine of the type set forth having a rotor provided with open ended radial slots, grinding bars tted in said slots, two exible bands formed of arcuate sections and bearing on said bars, radial rods carried by the rotor and capable of radial adjustment, cross bars carried by the outer ends of said radial rods, a pair of strut members secured to each end of each cross bar, each pair being connected to adjacent ends of two arcuate sections, a pair of opposed cylinders, pistons working in said cylinders and bearing on the inner ends of the radial rods and means by which fluid under pressure can be supplied to the two cylinders to force the pistons radially outwards.

JOHN MCINTYRE.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,564,427 McIntyre Deo. 8, 1925 1,594,193 Bramley-Moore July 27, 1926 1,638,355 McIntyre Aug. 9, 1927 1,692,884 Bramley-Moore Nov. 27, 1928 1,838,565 McIntyre Dec. 29, 1931