US1503960A - Centrifugal machine and process - Google Patents

Description

R. MACKAY, JR

CENTRIFUGAL MACHINE AND PROCESS Filed Jan. 14 1919 Aug. 5!

ATTORN EY Patented Aug. 5, 1924. I

RICHARD MACKAY, JR., F RIVERSIDE, ILLINOIS, ASSIGNOR 'IO' THE BARRETT COM A lie PANY, A QORPORATION OF NEW JERSEY.

OENTRIFUGAL MACHINE AND PROCESS.

Application filed January 14:1919. Serial No. 271,174.

To all whom it may concern:

Be it known that I, RICHARD MAGKAY, J12, a citizen of the United States, residing at Gage and Riverside Roads, Riverside, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Centrifugal Machines and Processes, of which the following is a specification. I

This invention relates to a rocess and apparatus for dividing or commlnuting fusible material such as pitch, asphalt, resin,

etc., whereby it is prepared in a finely divjided or comminuted state and then collectecl together in a convenient manner; It relates more particularly to a perforated centrifugal machine which is mounted on a horizontal axis in a housing having a conveyor along the bottom of the housing and so arranged that the collection of the comminuted particles more convenient than withthe vertical type of centrifugal. When perforated baskets mounted on vertical axes are used with which to comminute fused material by projecting it outwardly through the perforations, by means of centrifugal forceand letting it cool, it has been foun that a comparatively wide circular space is required through which the mate- 0 rial may be permitted to be thrown out and descend to the floor. As a result more floor space is required for a given capacity than with thehorizontal type. This feature of minimum floor space secured by the use of this process is of great value. Also with the vertical type the'product is distributed over a circular area and hence is less easy to collect than in this arrangement whereby it falls in a relatively narrow rectangular space on a conveyor.

Other objects and advantages of the invention will be obvious as the description proceeds. Y Y The invention will be readily understood by reference to the accompanying drawings in which: Fig. I a side view of the machine, partly in section, showing how the process 60 canbe carried out. l

line a-c of Flg. I. J

In the drawings reference character 1 refers to a housing within which is mounted the-centrifugal machine 2 whose diameter Fig. II is a sectional view taken along the is small compared to its length having perforations 3 in its walls, and mounted in bearings 4 and 4 for rotation upon a horizontal axis. The centrifugal machine 2 is driven from one end by a driving means 5 such as a motor or pulley. A feed pipe 6 having outlets 7 leads preferably by means of a liquid tight fitting through the bearing 4 t0 theinterior of the centrifugal machine 2.

This (pipe 6 leads from a tank 8 which is provi ed with an overflow pipe 0 and a upp y p conveyor 9 passes horizontally along the lower portion of the housing 1 over rollers 10 and 10, the rollers 10 being mounted at an angle so as to cause the conveyor in its travel through housing 1 to assume a trough-like shape, as shown, to prevent material from overflowing the edges of the conveyor. The conveyor 9 passes around rollers 11 which may be driven by any convenient means not shown.

The operation is as follows: The material in a hot liquid condition is fed into the tank '8 and flows through'pipe 6 to the rapidly rotating centrifugal machine 2 where it is distributed in a substantially uniform manner to the interior thereof and is thrown out through the perforations 3. If desired, the outlets 7 from pipe 6 may lead outwardly at an angle in order to feed the material in a tangential direction to the centrifugal machine 2. The material thrown .out of the perforations 2 assumes the form -of round bodies, either globular or 'filamentary which soon cool and fall to the floor in the form of small solid bodies. The size of the articles, when in globular form, will depend upon the nature and temperature of the material, the size of the perforations 3, and the speed and diameter of the machine 2, and the material'may be extruded either in the shape of shot-like bodies or filaments depending upon the fluidity or plasticity of the particular materlal that is being treated.

It is obvious that if the material is fed from the tank 8' more rapidly than it can escape from the perforations 3, the .machine 2 will become/filled and the material will finally accumulate in the tank 8 until the overflow pipe 0 is reached; provided the supply from pipe S is suificientl copious. In this case it is evident that tlie pres- 7 sure at outlets 3 caused by centrifugal force is increased by the amount of the hydrostatic pressure of the liquid column.

Several advantages accrue from this hori zontal centrifugal machine which the vertical type does not possess. The material can be supplied so that substantially the same amount reaches each one of the perforations 3 whether the machine is kept filled or not; the material is thrown out into a narrow space confined between two vertical planes.

substantially no farther apart than the length ofthe centrifugal machine thus saving space; the comminuted material can be easily gathered up by means of a conveyor through this narrow space; a blast of cooling air can be introduced near the bottom of the narrow housing and caused to rise thus providing an effective cooling space to assure solidifying of the material before it reaches the floor, because the air passes upwardly through a considerable distan'ce filled with the particles instead of through a narrow band of particles as would be the case with the vertical type; in case vapors or fumes are. given off of the hot comminuted material, they can be easily collected due to the narrow space within the housing, and condensed or otherwise disposed of.

The housing 1 is made sufficiently high and long so that very little, if any, of

the material will strike the top or ends of the same.

7 It has been found in practicing this inventionthat, for example, when pitch of about 250 F. melting point is 'used, shot of a size that will pass through a 20 mesh screen may be produced with a centrifugal machine. havin adiameter of 8 inches and perforations 0% i inch when driven at a speed of about 2000 revolutions per minute.

I claim:

1. The herein described process which comprises comminuting fusible material by projecting it in fluid form through a series rows of rotating apertures, each row being ina single vertical planeand the apertures in any 'particular row beingsubsta'n-.

tially\ equally spaced from a central point sothat the material from an angle to the axis of said the respective rows will be projected into a series of vertical planes, cooling the comminuted material in air, collecting the comminuted material and moving it substantially parallel with said vertical planes.

2. The herein described process which Y comprises maintaining a perforated centrifug al machine which is mounted upon a horizontal axis full of liquid fusible material and projecting the material through be exerted upon the entire inner surface.

of said machine.

4. In an apparatus of the class described, a perforated centrifugal machine mounted upon a horizontal axis, means for rotating said machine, means for feeding material into said machine through a liquid tight joint in the axis "thereof wherebysaid machine may be maintained entirely full of said material, and a housing surrounding said machine and a conveyor in said hous- 5. In an apparatus of the class described, a perforated drum mounted upon a horizontalaxis,- means for rotating said drum,

means for feeding materialintosaid drum and maintaining a static head upon all por- A tions of the interior of said drum.

6. In an apparatus of the class described,

a perforated drum mounted upon a hori zontal axis, means for rotating said drum,

means for feeding material into said drum and maintaining a static head upon all portions of the interior of said drumand. a housing surrounding said machine and a conveyor in said housing which travels at In testimony whereof I ture. v

- RICHARD mortar, Jn.

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