US978693A - Apparatus for washing sand and like material. - Google Patents

Description

S. A. GAPRON.

APPARATUS FOR WASHING SAND AND LIKE MATERIAL.

APPLICATION FILED MAY 19,1909.

Patented Dec. 13, 1910.

l HVIIIIIIIIIIHIIIHU SETH A. CAPRON OF WESTFIELD, MASSACHUSETTS.

APPARATUS FOR WASHING' SAND AND LIKE MATERIAL.

Specification of Letters Patent.

Patented Dec. 13, 1910.

Application filed May 19, 1909. Serial No. 496,908.

To all whom it mayconcem:

Be it known that I, SETH A. CAPRoN, a cltlzen of the United States, and resident of Westfield, in the county 'of Hampdenand State of Massachusetts, have invented new and useful Improvements in Apparatus for Washing Sand and Like Material, of'which the following is a specification.

My invention relates to apparatus for cleansing and classifying solid'mate'rial and v is especially addressed to the cleansing of 1 being core sand after use in a foundry.

After once being used in the manufacture of castings, core sand should be cleansed and freed from impurities, bits of stone, scra metal, and the like before it is again use for core purposes. 'The practice heretofore prevailing 18 to cleanse oore sand by means of an air blast, and 'one object of m invention is to substitute a wet rocess which will be at least as effective an at'the'same time chea er than the air process.

In-t-he drawings hereto annexed,-Figure 1 is a vertical longitudinal elevation, partly in section, of an apparatus embodying my invention; and Fig. 2 is an end view in section at line 2-2 0 Fig. 1.

L represents a cylindrical drum of sheet.

iron or other suitable material secured to the shaft Mby means of s iders N and rovided with end flanges at L and L the ange L deeper than the flange L Circular openings at B and C are thus formed concentric with the shaft M.' The shaft M with the drum L is mounted on bearings so that the drum is substantially horizontal and a pulley P or equivalent means for rotating the drum L' is secured to the shaft M. The

[material to be cleansed, for instance, a mass of core sand containing dirt, stones, b1ts of scrap metal, or other foreign matter is introduced into thedrum through the inclined hopper A which is secured .to any suitable framework outside of 'the drum L and projects inward throu h the openin B at one side of-the shaft Through t e openin B there is also introduced a water pipe which is preferablyprovided with aspray nozzle X wherewith to spray and scatter water upon the entering material.

On the interior of the drum L, I rovide a series of agitating flanges. The anges F are arranged angularly or spirally so that as the drum L is rotated in the direction of the arrow in Fig. 2, the flanges F not only scoop u the solid material from the bottom of the rum, but also propel it toward the delivery opening C. The pro elling angle of the flanges I may be varie within reasonable limits and may be very sli ht as the constant agitation of the materia together with the flow of water from the feed end to the discharge end of the drum will carry the material toward the discharge end even though the propelling angle of theflanges F be not very steep. For ordinary practlce I recommend a drum about 30" in diameter with flanges, as F, projectin four inches from the shell 0 the drum and setat an angle of about 30 to the axis of the drum. Preferably, also, I provide several sets of agitating flanges and make one set staggered with another as indicated in Fig. 1.

- t or near the discharge end of the drum, I arrange agitating flanges projecting from the interior of the drum as at G. These flanges are set at a retarding angle so that their tendency is to move the solid material back from the discharge end of the drum. The flanges G thus prevent the heavy materials from piling up near the discharge end of the drum in such manner as to fall out with the li hter materials and water through the disc arge cone at K which surrounds the lip of the o ening C. The angle at which the flan es are set is such that the heavy materia s on being carried up by the flan es are spilled into the discharge chute which is secured to an external framework and projects outward through the openin C deliverin the material upon an incline screen S. ater and light material suspended therein flows out through the opening C and over the dischar e cone K into a trough D through which it ows to a settling tank T.

The operation of the washing machine is as follows: Water being-introduced-through the pipe W and core sand with admixed impurities being introduced through the hopper A, the solid and liquid contents of the drum are thoroughly agitated by the agitating flanges F, the sand and other heavy materials being carried up and spilled again into the water and at the same time being moved by the successive action of these inward about flanges toward the outlet end of the drum.

water over the lip of the cone K to the trough D and flow to the settling tank, whereas sand and other heavy materials while agitated are prevented from forming a mass of mud at the discharge end of the drum by the operation of the flanges Gr which, as above described, are set at a re tarding angle so that they tend to move the heavy material away from the discharge opening C. These heavy materials having thus been washed and freed from dustand light dirt of all kinds, are carried up by the flanges G and spilled upon the discharge chute H which conducts them to the inclined screen S. This screen is of proper mesh to allow the washed sand to pass through it but to retain and deliver at the end of the screen all larger particles such as stones and scraps of metal. Suitable receptacles, not shown,:may be placed beneath and at the end of the screen S to catch the separated materials. j

An apparatus constructed as above described has a large operative capacity and will clean and separate core sand and the like more economically than any of the methods known to me which have been in vogue. I

What I claim and desire to secure by Letters Patent is:

1. In a machine for washin sand and like materials, the combination with a rotatable drum having its ends closed save for central feed andtdischarge openings; of flanges provided interiorly of said drum, the flanges adjacent the feed opening being inclined forwardly in the direction of rotation of said drum, and the flanges adjacent the discharge opening being inclined oppositely to said first-namedfianges, so as to prevent the material being washed from piling u near the corresponding end of the drum an means for constantly conveying material from the drum as it is raised by the flanges adjacent the discharge opening.

2. In a machine for Washing sand and like materials, the combination with a rotatable drum having its ends closed save for central feed and discharge openings; of flanges provided on the interior wall of said drum, the

flanges adjacent the feed opening being in clinedforwardly in the direction of rotation of said drum, andthe flanges adjacent the discharge opening being inclined oppositely to the first-named flanges, so as to prevent the material being washed from piling up near the corresponding end of the drum and means for constantly conveying material from the drum as it is raised by the flanges adjacent the discharge opening.

3. In a machine for washing sand and like Y materials, the combination with a drum rotatable on a horizontal axis, said drum having its ends closed save for central feedand discharge openings; of means for supplying material delivered thereto by the internal flanges adjacent the discharge opening and to constantly discharge said material.

Signed by me at Westfield, Massachusetts, this 15 day of May 1909.

SETH A. CAPRON. Witnesses:

Lnwls C. PARKER, FLORENCE I. SMITH.

Images