US718279A - Mold-emptying apparatus. - Google Patents

Description

PATENTED JAN J. c. REED. MOLD EMBTYING APPARATUS.

.APPLIOATION FILED MAR. 28, 1902.

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No. 718,279. PA TENTED JAN. 13, 1903.

J G. -REED. MOLD EMPTYING APPARATUS. APPLICATION FILED In. 28, 1962.

N0 MODEL. 2 SHEETS-SHEET 2 Atlorneyd" UNITED STATES PATENT OFFICE.

JOHN G. REED, OF ALLEGHENY, PENNSYLVANIA.

MOLD-EM PTYING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 718,279, dated January 13, 1903.

Application filed March 28, 1902. Serial No. 100,476. (No model.)

To all whonz it may concern:

Be it known that I, JOHN G. REED, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Mold-Emptying Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to mold-emptying apparatus, and has for its object the provision of means for dislodging the sand from a bath-tub mold after the tub has been cast.

In a system for conducting the molding and casting operations in a large and wellequipped foundry which I have devised and reduced to practical working shape the flasks are filled at certain places, then transferred by cranes to other points, where they are filled with metal, after which they are moved so as to bring them over pits in the foundryfloor and the sand dislodged and allowed to fall into the pits, from which it is conveyed, by means of carriers, lifts, &c., to a series of hoppers or chutes, through which it is finally dropped into flasks or to the foundry-floor in heaps conveniently available to the molders-- that is, to the places from which it was originally taken to fill the molds. This system contemplates the greatest economy in time and labor in the molding and casting operations, and in order that the flasks may be used over and over again without loss of time it is necessary that the sand should be removed just as soon as the metal has set and the tubs can be removed from the molds.

I have found that the most serviceable and advantageous means for dislodging the sand from the mold is to subject the convenient parts of the flask to a series of vertical jolts or jars produced by means of supportingbars arranged over the mouth of a pit, operated by suitable power mechanism located below the floor-line of the foundry and so arranged and operated that the flask will be slightly raised and then allowed to drop suddenly upon stationary beams or other supports, thus producing a series of shocks rapidly succeeding each other and of such a character as to completely dislodge the sand from the flask and cause it to fall into the pit. My present invention, having relation to such shock-producing or jolting apparatus, consists in the combination and construction of devices for the purpose of automatically producing such sudden and forcible movements of a mold or flask as will dislodge the sand and empty the flask.

My invention further consists in the novel construction, combination, and arrangement of devices hereinafter particularly described and claimed.

In the accompanying drawings, Figure 1 is a plan view showing part of a foundry-floor with my improved flask-jolting devices in place. Fig. 2 is a vertical sectional view on the line X X of Fig. l. sectional View on the line Y Y of Fig. 1L

The pitA (shown in full lines in Fig. 1 in plan and diagrammatically in section in dotted lines in Figs. 2 and 3) at its bottom communicates with a horizontal passage B, through which the sand dropped into the pit is conveyed away by a suitable conveyer consisting, preferably, of hinged flights or scrapers which swing in one direction and are stopped from swinging in the other direo tion. A reciprocating movement being imparted to the conveyer, the sand is made up into small heaps and gradually fed along to a lifting-conveyer. The horizontal passage B is shown in dotted lines in Figs. 2 and 3 diagrammatically in cross-section and longitudinal section, respectively.

The pit A is of sufficient size to allow a its walls so that the entire contents of the flask will fall into the pit. At suitable points rails B. attached to I-beams B span the mouth of the pit, the beams being supported at their ends in fixed positions. Between each beam and the adjacent edge of the pit is arranged a horizontal bar B which has attached to and depending from it two bars C, which are fitted to slide in guides 0, secured to the beams B Below the bars 0 and running horizontally at right angles with the bars 0 shafts D are arranged and mounted in suitable bearings. Each shaft has keyed to it a cam E, the periphery of which Fig. 3 is a vertical flask to be arranged within the planes of if .well as a jar or shock.

is formed of or describes two half-circles of different diameters, producing an abrupt radially-extending shoulder Z. The cams and shafts are so located that the bars C will ride on the peripheries of the cams and as the latter turn in one direction will be raised by the cams until the outer ends of the shoulders are reached, when the standards 0 will drop suddenly toward the centers of the cams.

The flask to be emptied of sand is lowered upon and supported by the rails B, the bars B being at the time below the plane of the top of the rails. The shafts D, which are driven from a power-shaft D through bevelgearing D are now caused to rotate, and the result is that the flask will be lifted slightly above the rails and allowed to drop onto the latter once with every complete revolution of the cams.

The flask G to be emptied is shown in dotted lines in plan, Fig. 1, which also represents in dotted lines the gearing D and shafts D. The flask is shown in side View in Fig. 2, which also shows in side view one of the shafts I).

I prefer to-arrange the cams so that opposite sides or opposite ends of the flask will be lifted and dropped alternately, thus imparting a slight rocking motion to the flask as The arrangement of the cams is such that one side or end of the flask will be lifted and dropped before the other side or end is raised, thus producing an abrupt shock or jar the effect of which is terminated before the next takes place.

It may be here mentioned that when the flasks are emptied by pounding and hammering the Walls and other parts, as has been customary, greatand rapid injury ensues.

By my improved devices no injury to the flask can possibly occur, and hence the life and efficiency of the flasks are preserved.

The power for operating the shocking mechanism is controllable, so that the same may be stopped or started at will.

Having described my invention, I claim and desire to secure by Letters Patent-- 1. An apparatus for jolting and. emptying molders flasks, comprising stationary supports for a flask, and devices for automatically and continuously lifting the flask from and suddenly dropping it onto the supports, substantially as described.

2. An apparatus for jolting flasks to loosen and dislodge their sand contents, consisting of stationary flask-supports arranged at or near the mouth of a pit in which the sand is to be deposited, and mechanical automatically-operating devices forlifting and dropping the flask alternately at opposite sides or ends, substantially as described.

3. In an apparatus for jolting mold-flasks, to dislodge the sand, the combination of the stationary rails B, vertically reciprocating bars B, standards C depending from said bars, guides C, cams E, and power-driven shafts D, substantially as described.

at. The combination with a pit, and devices arranged below the same for conveying away molding-sand, of mechanism arranged at the mouth of the pit, for automatically raising and suddenly dropping molders flasks, to dislodge the sand into the pit.

In testimony whereof I affix my signature in presence of two Witnesses.

JOHN C. REED.

Witnesses:

W. L. CARR, J. O. LANGFITT.

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