US919600A - Machine for making sand molds. - Google Patents

Description

E. J. LAHAN. MACHINE FOB MAKING SAND MOLDS.

APPLICATION FILED NOV. 26. 1908.

919,600. Patented Apr. 27, 1909.

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MACHINE FOR MAKING SAND MOLDS.

APPLICATIoN FILED Nov. z5, 190e.

Patented Apr. 27, 1909.

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E. J. LAHAN.

MACHINE FOB. MAKING- SAND MOLDS.

APPLICATION FILED NY. 25, 1908.

Patented Apr. 27, 1909'.

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@wil/5%?? Gwi h1 om n dttoznuzo EDWARD .TAB'IES LAHAN, OF QUINCY, ILLINOIS.

MACHINE FOR MAKING- SAND MOLDS.

Specification of Letters Patent.

Patented April 27', 1909.

Application led November 25, 1908. Serial No. 464,376.

.To all whom it may concern.'

Be 1t known that I, EDWARD JAMES LAHAN, a citizen of the United States, rcsidmg at Quincy, in the countyr of Adams and State oi Illinois, have invented a new and useful Machine for Making Sand Molds, of which the following is a specification.

This invention relates to machines for making sand molds and has for its object to provide a strong, durable and thoroughly ellicient device of this character' by means of' which the formation of sand molds may be effected with greater rapidity and with less labor' on the part of the operator than heretoiore.

A further object of the invention is to provide improved means for tampin g or packing the sand in the molding flask, and means for transferring the flask from the. tamping mechanism to the pattern drawing device.

A further object is to provide means for adjusting the tamping elements or rammers verticallyT of the supporting frame, thereby to vary the pressure exerted y said tamping elements on the contents of the flask.

A further object is to provide means ior feeding the sand to the flask, and means for conveying the surplus or waste sand back to the feed hopper after each molding operation.

A still further object ol the invention .is generally to improve this class of devices so as to increase their utility, durability and efliciency.

Further objects and advantages will appear in the following description, it being understood that various changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims.

In the accompanying drawings Jforming a part of this specification z-Figure 1 is a longitudinal sectional view ot' a sand mold making machine constructed in accordance with my invention. Fig. 2 is an end elevation of the same. Fig. 3 is an end view partly in section of the pattern drawing device. Fig. 4 is a detail transverse sectional view taken on the line 4 4 of Fig. 2.

Similar numerals of' reference indicate corresponding parts in all of the 'figures of the drawings.

The improved machine forming the subject matter ot' the present invention includes a substantially rectangular' supporting frame including corner posts.5 connected by longitudinal and transverse beams 6 and 7.

Slidably mounted on the stationary supporting frame is a movable frame 8 comprising vertically disposed side members 9 connected by one or more spacing strips 10 and to the upper end of which is secured an elongated l'rame 11. Mounted for vertical movement between the side members of the trame 8 are a plurality oi' telescopic tamping elements 12, 13 and 14, said tann'iing elements being substantially rectangular in shape and adapted to tamp or pack the sand in the llask 15. Secured to the tamping elements arc vortically disposed rods 16 which pass through alined openings in the guide strips 1() and are provided with terminal eyes 17, for the purpose hereinafter referred to. The upper longitudinal connecting beams 6 ol thc main supporting frame are extended laterally to form supports 18 for a pair ot standards 19 in which is journalcd a transverse shalt 20. Secured to the shai't 2() arc a series olE hand operating levers 21 cach having its intermediate portion pivotally connected at 22 with the adjacent rods 16.

The tamping elements 12 and 15 are provided with oppositely disposed actuating rods 16, while the central tamping element 1-1 is provided with a single actuating rod, the actuating rod ot the outer tamping element 12 being arranged to bear against the inner faces of the side members 9 for connection with the adjacent operating levers 21, there being vertically disposed slots 23 formed in the side members 9 to permit the passage ol the pivot pins 22.

Secured to the eye 17 of each actuating rod 16 is one end of a cord or other flexible niediuni 2l, the opposite end ol which passes over suitable rollers or pulleys 25 secured to the upper wall of the transverse l'ramc 11 lor attachment to a weight or counter-lialancc 2G which servos to return the operating levers 21 automatically to elevated position a'lter said levers have been depressed to ell'ect the tainping of the sand in the 'llask 15.

Secured to the upper wall olE the frame is a substantially triangular auxiliary frame 27 to the apex of which is secured a pulley or roller 2S similar in construction to the pulley or roller 25 and. over which passes a llexible cable 29, one end of which is connected with the actuating rod olt the central tamping eloment 14, while the opposite cnd thereof is also secured to a counter balance or weight, as shown. A

'lhe side members 9 ol' the vertically movmetal from bursting through the severall parts of the sand mold, while the inner tamping member 14 is designed to pack the sand in the drag and around the core, the intermediate tamping element 13 being designed to pack the sand and hold the same in the flask. Thus it will be seen that the tamping' elements 12, 13 and 14 being each pivoted to an operating lever are movable independently of each other, while the several tamping elements are movable simultaneously to raised and lowered position by means of the pinions 31 and rack 30.

The lower sills 6 of the main supporting frame are extended longitudinally to form spaced horizontally disposed bars 33 to which are connected the uprights 34 of' the pattern drawing device. I

Fastened to the inner walls of the standards 34 are blocks 35 having transverse grooves formed therein for the reception of correspondingly shaped cleats 36 formed on the flask 15, said blocks being provided with stub shafts 37, one of which is provided with a crank or handle 38 so that when the flask is positioned between the uprights 34 and the handle 38 rotated, said flask may be revolved between the standards to permit the drawing of the pattern.

The standards 34 are provided with vertically disposed slots 39 for the reception of the stub shaft 37 so as to permit vertical adjustment of the bearing blocks 35 and flask 15.

Slidably mounted on the inner faces of the standards 34 are spaced rack bars 40 having their lower ends connected with the bearing blocks 35 and which are adjusted vertically of the standards 34 to effect the vertical adjustment of the flask 15 by means of pinions 41 journaled on the transverse shaft 42, as best shown in Fig. 4 of the drawings, there being a hand wheel 43 secured to one end of the shaft 42 for rotating said shaft to effect the adjustment of the ask. Thus it will be seen that by positioning the flask 15 between the standards 34 of the pattern drawing' device with the cleats 36 in engagement with the grooves of the blocks 35 and rotating the hand wheel 43, the flask may be adjusted vertically of the standards so that by revolving the crank 38 the flask may be rotated to permit the withdrawal of the pattern.

Arranged between the horizontal bars y33 is a track 44 on which is mounted for travel a carriage 45 adapted to receive the flask 15 and transfer the latter from the tamping device to the pattern drawing device.

Above the main supporting frame is a hopper 46 having its lower end bifurcated at 47 and arranged to discharge into the flask 15, there being an agitator 48 mounted for rotation in the hopper 46 for the purpose of agitatin the same and allowing the latter to flow lfreely to the flask.

The agitator 48 is preferably in the form of a worm screw, one end of which is provided with a pulley 49 which may be connected through the medium of a belt with an engine or other suitable source of power.

Arranged beneath the main supporting frame is a pit 5() having spaced sprocket wheels 51 j ournaled therein and on which is mounted for rotation an endless conveyer 52 carrying a plurality of buckets 53 adapted to receive the surplus or waste sand whenlling the flask and convey the same to a receiving pocket 54 from whence it is delivered on a conveyer 55 to the hopper 46.

rlhe conveyer 55 is preferably in the form of an endless belt or chain having buckets 56 similar in construction to the buckets 53, said conveyer being arranged to travel on suitable sprocket wheels 57 and actuated from any suitable source of power. Arranged at the base of the conveyer 55 is a shaking screen or riddle 58 for removing any particles of dirt, gravel or other foreign matter from the sand before the latter is delivered to the flask 15. The screen 58 is preferably inclined in the direction of the conveyer 55 and oscillated through the medium of a cam 59 arranged to bear against the bottom of said screen, as best shown in Fig. 1 of the drawings.

Extending transversely across the main supporting frame and secured in any suitable manner to the uprights 5 is a track 60 for the reception of a snap flask, indicated at 61, the latter to be worked out under the tamping element 12 and rammers 13 and 14 when the floor flask 15 is not in use.

1n operation the flask is placed upon the carriage 45 and the latter moved to a p0si tion beneath the tamping elements. Sand is then deposited on the screen 58 and is taken up by the conveyer 55 and discharged into the hopper 46 from whence it flows through the discharge spouts 47 of the hopper. into the flask, the surplus or waste sand falling into the pit 50 from whence it is again conveyed to the hopper in the manner before stated. After the flask is filled with sand the tamping elements are actuated by manipulating the operating levers 21. The flask is then moved on the carriage 45 t0 the pattern drawing device and said flask secured to the bearing blocks 35 and elevated by actuating the hand wheel 43, the rotation of the flask 15 being effected by revolving the crank 38, as will be readily understood.

From the foregoing description it is thought that the construction and operation of the device will be readily understood by those skilled in the art and further description thereof is deemed unnecessary.

Having thus described the invention what is claimed is :M

l. In a machine for making sand molds, a fiask, means for feeding sand to the flask, and a plurality of telescopic tamping ele ments movable to operative position Within the flask.

2. In a machine for making sand molds, a flask, means for feeding sand to the flask, and a. plurality of telescopic tamping elements movable simultaneously or independently to operative position Within the flask.

3. In a machine for making sand molds, a

flask, means for feeding sand to the flask, a plurality of telescopic tamping elements movable to operative position within the flask, and operating levers connected With the tamping elements for actuating the same.

4. ln a machine for making sand molds, a flask, means for feeding sand to the flask, a plurality of telescopic tamping elements movable to operative position Within the flask, rods connected with the tamping elements, operating levers pivotally connected with the rods, and means for normally and yieldably supporting the tamping elements in elevated position.

5. In a machine for making sand molds, a flask, means for feeding sand to the Flask, a plurality of telescopic tamping elements, rods secured to the tamping elements, operating levers connected with the rods, and a flexible element secured to eaeh'rod and provided with a counter balance.

ln a machine for making sand molds, a flask, means for feeding sand to the flask, and a plurality of telescopic tamping elements, said tamping elements being movable simultaneously or in .lepei'ulently to operative position within the flask, and means for automatically returning said tamping elements to inoperative position.

7. ln a machine for making sand molds, a stationary frame, a movable frame, a flask disposed beneath the movable frame, a plurality of telescopic tamping elements carried by the movable frame, means for adjusting the movable frame vertically of the stationary frame, and operating levers pivotally mounted on the stationary frame and operatively connected with the tamping elements for actuating the latter.

S. In a machine for making sand molds, a stationary frame, a movable frame, a plurality of telescopic tamping elements carried by the movable frame, a flask disposed beneath the tamping elements, rods secured to said tamping elements, means for adjusting the movable frame vertically of the stationary frame, operating levers connected with the rods, and a flexible element secured to each rod and provided with a counterweight.

fin testimony that l claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

EDVARD JA MES LAHAN.

VitneSSeS:

ELMER SonRonDER, JOHN B. BnaNisnocK.

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