US2613037A - Machine for grinding or refining paint, cellulose, chocolate, and similar substances - Google Patents

Description

J. MGINTYRE A2,613,037 FINING PAINT, CELLULOSE, CHOCOLATE, AND SIMILAR SUBSTANCES Filed April 29;, 1949 Eve/#0f Z7/7 Ncl'pyfd. i yeff Afkrmys.

lll i ll l Il l .U u u Il MACHINE F'ORlGRINDING OR REI Patented ct. 7, 1952 MACHINE Foa PAINT,` CELLULOSE, CHOCOLATE, AND SIMILAR SUBSTANCES Application April 29, 1949, Serial No. 90,382

In Great Britain May 10, 1948 2 Claims. 1

This invention has reference to machines for grinding or refining paint, cellulose, chocolate and other substances and relates` particularly to such machines of the type comprising a cylinder, the inner face of which is provided with stationary longitudinally extending grinding bars, and a rotor mounted on a driven shaft and carry- `ing resiliently loaded longitudinally extending grinding bars, which, when rotated, co-operate with the stationary grinding bars.

Heretofore in such machines the aforesaid stationary grinding bars have been` separately assembled within the cylinder and then tightened up by means of a longitudinally extending key introduced between two of said bars. When the grinding faces of said bars become worn it is necessary that they be withdrawn from the cylinder, machined to reform the grinding faces and thereafter individually replaced in the cylinder and tightened up as aforesaid.` The reassembling of the bars within the cylinders takes a considerable time and labour and generally must be done by the makers of the machine. For that reason in many cases a spare cylinder with grinding bars therein is kept in reserve by the users of such machines, the spare cylinder being substituted for the cylinder with worn bars so that the latter cylinder can be returned to the makers.

I am aware that it has been proposed to provide a cylinder of a Jordan engine with a removable split liner formed of grinding bars which are secured in spaced relationship with respect to each other by welding them to spacing elements or to ribs, the liner so formed being secured in its cylinder by means of a wedge driven into the split.

The present invention has for its object to provide an improved liner of the type set forth which will present the maximum grinding surface and which can easily be inserted in and when worn, withdrawn from the cylinder so that a new liner can be readily substituted therefor.

The invention will now be described with reference to the annexed drawings wherein:

Figure l is a perspective view showing the method of making the improved liner,

Figure 2 is a perspective view of the liner,

Figure 3 is an elevation of a machine of the type set forth with liner in accordance with the invention, and

Figure 4 is a sectional side elevation of the cylinder of a machine of the type set forth omitting the rotor and showing a liner in accordance with the invention with alternative means for holding the liner in position within its cylinder.

The improved liner is formed of grinding bars a which constitute the stationary grinding bars of the machine. Said bars are assembled to lie closely adjacent to each other round a mandril b which is suitably supported on end bearings,

not shown, and on which loose retaining rings c, c are previously placed. The inner or grinding faces of the bars bear on the mandril the diameter of which is that of the internal diameter of the cylinder d into which the` lining :is to be fitted less twice the depth of a bar. The bars are threaded between the mandril and the rings c, c which retain the bars in position.

When the bars are so supported they are forced hard against each other in a circumferential direction by the introduction of a key or wedge e between two adjacent bars and when the bars are so held they are secured togetherby welding or brazing as indicated at f, f. On the removal of the key or wedge e and the said rings thetlining can be slipped off the mandril as a um Such lining shown in Figure 2, can be fitted in the cylinder d of a machine of the type set forth and made fast therein by means of a key or wedge h driven into the space i previously occupied by the temporary key or wedge e.

It will be noted that there are no spaces between the bars and that the bars are welded to each other. In consequence of this construction the bars present the maximum grinding surface.

When the grinding faces become worn said key or wedge h can be removed, the lining withdrawn and a new lining, which may be kept in reserve, then fitted and secured within the cylinder.

In lieu of the lining being secured by a key or wedge h the bars may form a complete cylinder and, as shown in Figure 4, at least one of the bars j is of such length that it extends beyond the others, as at k, to mate with corresponding recesses in the end covers Z of the machine so as to prevent rotary movement of the lining with respect to the cylinder d.

I claim:

1. In a machine of the type set forth a cylinder lining formed solely of parallel grinding bars, the two sides of each grinding bar bearing hard on the grinding bars on each side thereof throughout their length so that such close contact of grinding bar against grinding bar gives the maximum grinding surface to the liner and which grinding bars are secured together by the fusion of metal so that they can be fitted in the' cylinder and removed therefrom, when worn, as a complete unit.

2. A cylindrical lining for the cylinder of a UNITED STATES PATENTS machine of the type set forth formed solely of Number Name Date parallel grinding bars, the two sides of each 975 ,141 Lewis Nov 15 1,910 grinding 4har bearing hard on the grinding bars -1 947644 G1eyd Feb. 20 1934 0n each side thereof throughout their length .so 5 2057307 Memtye 1 Oet 13 1936 that such close Contact of grinding bar against 2119676 Heuer iL- June 7 1938 grinding bar gives the maximum grinding surface 2'187504 Sluek u "Jen'h 16' 1940 to the linerand which grinding bars are secured 2212082 J Steinberg; Aug 20' 1949 together by the fusion of metal so that they can 2315'055 Heuer un-:FII: Mar: 30 1943 blltted in the cylinder and removed therefrom;Y 10 2356278 Sehue1e1. Aug 22 1944 w en Worn, asa complete unit.v n

Y JHNMCINTYRE. y* 2,549,310 e Hlntllan Apr. 17, 1951 Y f OTHER REFERENCES REFERENCES CITED iron Age, June 19, 1930, pages 1818, 1819, 1820,

The following references are' of-record inv the :'15 1821.

Vfile of this patent:

Images