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Dec. 10, 1946. ' ? 7' _ ? H. H. RAWSON 2,412,425 FOUNDRY SAND SIFTING AND FLASK-FILLING APPARATUS Filed Sept. 6, .1944 l 41; | I "ml'll; I} [I E? "I ' � 2 Sheets-Sheet l . ,3 ' III - I ' _ A? _ /f I I I I I I I I ?Km I ?V ' '- ,/7 I I- o ' I 1 I Bnuentor - Harry/V. Wan/30? ? I (Ittdrhcg Dec.10,1946.' ,? ?_.H,HY,RAWSON 2,412,425 FVOUNDRY ?SAND SIFTING ?AND FLASK-FILLING APPARATUS Filed Sept. 6, 1944 ' - 2 Sheets-Sheet 2 3/ - a4 _ 37 4 m I g, . / G . 20. �3 i so 39 I :0? ~ ? - _ ? 3nnentor Harry H Ra WSO/Z . Patented Dec. 10, 1946 2,412,425 UNITED STATES PATENT OF FICE,? 2,412,425 FOUNDRY SAND SIFTING AND FLASK FILLING APPARATUS . Harry E. Rawson, Spokane, Wash. Application September 6, 1944, Serial No. 552,906 1 Claim. ' (Cl. 209?240) 1 This invention relates to a ?ask-?lling appa ratus and it is one object- of the invention to provide an apparatus by means of which ?asks used by moulders in a foundry may be quickly and very easily ?lled with sand which has been sifted in?order to remove foreign matter. ' Another object of the invention is to provide a ?ask-?lling apparatus wherein a hopper for holding sand may be supported above a frame 2 . nut ID for resting upon the sleeve and supporting the plate in a vertically adjusted position. The portion of the machine so far described is con 5 , ventional and, at the present time, it has been customary to ?ll the ?asks with sand scooped from a pile on the floor with a shovel. This has been found unsatisfactory as dirt and other for eign matter is liable to become mixed with the sand and deposited inthe ?asks as sand is shov mounted for reciprocating movement over a bag 10 .eled into them. and carrying a screen or riddle through which In the improved apparatus, the sand as received the sand passes so that only clean sand will drop at a foundry is placed in a hopper II in any de into the bag. 7 sired manner, where it is stored before being used. Another object of the invention is to provide This hopper is carried at the upper end of a stand the frame with a riddle support so mounted that 15 ard I2 by an arm is and from the hopper extends it may be released and swung downwardly to a bracket M braced by an arm I5 bearing against inoperative position allowing removal of the rid the standard. The bracket [4 carries a cylinder dle for cleaning and replacement after cleaning. It in which a piston I1 is reciprocated by air Another object of the invention is to provide delivered from a source of supply by a pipe line the apparatus with a bag for receiving clean sand, 20 It controlled by a valve l9, the cylinder l6 and the bag being tapered toward its lower end which its piston ll being of conventional air-actuated is open and surrounded by a ring having handles design. At its outer front end the piston I1 is by means of which the lower portion of the bag ?Xecl toa frame 2% formed 01'? strong ?metal and may be turned upwardly and thus closed to re~ preferably circular in shape.v This frame or ring tain sand in the bag. 20 is provided at opposite sides with trunnions 2| Another object of the invention is to provide which engage through eyes at lower ends of links improved means for holding the lower portion of 22 suspended from trunnions 23 at opposite sides the bag in folded position after a ?ask has been of the hopper H and when the piston I?! is re ?lled with sand. ciprooated in the cylinder [6, reciprocation will? Another object of the invention is to provide be imparted to the frame or ring 20. an apparatus of this character which is simple in Within the frame or ring is disposed a screen construction and very easy to operate. or riddle 24 of appreciably smaller diameter than In the accompanying drawings: the ring so that it ?ts loosely therein and may Fig. 1 is a side elevation of the ?ask-?lling be very easily inserted or removed. The riddle apparatus with portions in vertical section. rests upon a frame or support 25 formed of metal Fig. 2 is a view on the line 2--2 of Fig. 1. rod and of oblong shape. This support or frame Fig. 3 is a sectional view on an enlarged scale taken through the riddle and its support, on the line 3-3 of Fig. 2. Fig. 4 is a fragmentary View showing the lower portion of the hopper and the riddle-carrying . extends diametrically of the ring 20 and has its rear cross bar mounted through a bearing bracket 26 at the back of the ring and the cross bar has ?its front end formed with a forwardly projecting slotted tongue 27 to receive a threaded stem 28 support suspended therefrom. ? pivotally carried by a bracket 29 so that it may This improved ?ask-?lling apparatus has a be swung vertically into engagement with the base I carrying a vertically adjustable support or tongue and the wing nut 30 then tightened to! lift 2 upon which the ?ask 3 to be ?lled with secure the frame 25 in its raised or operative sand is placed. This lift has a conventional position where it will support the riddle in the pneumatic lift construction and is actuated by ring 2!). When the ring is reciprocated by action the usual lever 4 so disposed that it may be of the piston the riddle will be shaken and stones operated by pressure applied to it by an oper and trash held in the riddle while lumps of sand ator standing in front of the apparatus. A sec 50 will be broken up and all of the sand in the riddle ond pneumatic lift 5 is located back of the lift 2 will pass through it. By loosening the nut and and its cylinder 6 carries a plate ?I which is swung swinging the bolt 28 upwardly out of the tongue, over the ?ask after the ?ask has been ?lled with the frame may be lowered and the riddle removed, , sand. The plate is carried by a threaded stem cleaned, and replaced, and the sup-port or frame 8 which passes through a sleeve 9 and carries a 55 25 again secured in its raised position. 2,412,425 4 . ' 3 . Under the ring 28 is a circular frame 3| formed of inner and outer rings 32 and 33 between which ? is secured the upper end of a bag 34 formed of ? fabric and tapered toward its lower end, which . is open so that sand may flow out of the bag . and into the ?ask over which the lower end of the bag terminates in spaced relation thereto. . . hook catches upon the ring and the bag will be held folded and no sand? can ?ow from its lower end. By adjusting the hook along the rod the . extent to which the bag is folded may be con trolled. When the ?ask is to be ?lled, it is merely necessary to shift the rod upwardly, turn it slightly to detach the hook from the ring 3| and r then allow the rod to slide downwardly to its full The outer ring carries a hinge bracket 35 having extent. The bag will thus; assume the position at its outer rear end a head 36 formed with a toothed inner side face for inter?tting engage 10 shown in Fig. 1 and sand may flow from it into the ?ask. When the riddle becomes clogged with ment with the similarly toothed side face of the head 31 of a bracket 38 which is ?xed to the inner ? face of the standard l2 below the cylinder IS. foreign matter screened from sand delivered to " it from the hopper ll, the wheel nut 41! is loos ened and the ring 3| and the upper portion low A threaded stem 39 extends from the head 36 through head 31 and carries a Wheeled nut 49 15 ered until the ring 3| hangs vertically from the. bracket 38. The frame 25 is then released and which, when tightened, draws the head 36 into _; lowered, together with the riddle ?or screen 24 engagement with the head 31 and ?rmly holds l and the riddle removed from the frame and the bracket 35 against tilting movement. There cleaned. The riddle is thenreplaced upon the fore, the ring or frame 3| will beheld in hori- ? zontal position and close to the frame 25 so that 20 frame 25 which is returned to the raised position, as the ring 25 is reciprocated by the piston |'|, clean sand shaken through the riddle will drop into the bag. 7 _ (where it is secured by the bolt 28; the? ring or ?frame 3| being then swung upwardly to raised position and the nut 40 tightened to hold it in? ' When the bag is in the position shown in Fig. 1, sand may flow therefrom? into the ?ask and fill 25 this ther?ask. After the ?ask has. been ?lled, flow? claimed of sand from the bag must be stopped. To ac complish this, the lower end portion of the sack ? or bag is folded upwardly. About its open lower endthe bag carriesa collar 4| from which extend radiating rods 42. One of these rods has a sleeve 43 at, its. outer end in which is ?xed the lower endof a rod 44. The rod 44 extends vertically with its upper portion slidably engaged through a sleeve 45 carried by the hopper H at the front thereof, and a nut 46 upon the rod limits its; downward movement through the sleeve. A hook 41 is mounted upon the rod 44 for adjustment longitudinally thereon andtwhen the operator grasps. one or. two of? the rods or handles. 42 of. the ring and exerts upward thrust, the ring and the vrod will be shifted upwardly and the lower; portion of the bag turned upwardly with the ring. After the rod has been shifted upwardly a su?i cient distance for the hook to overhang the frame 3| and then allowed to move downwardly, the? position. v v, _ ' . : Having thus, described the ' invention,? what is is: ' ? ' ' ? " A ?ask-?lling apparatus comprising a base, a ? standard rising from said base, a hopper "sup? ported from said standard and spaced upwardly? - from the base, a riddle mounted for reciprocating movement under said hopper, a fabric bag under said riddle tapered toward its lower end and having rings at its upper and lower ends, rods projecting frornthe lower ring, a rod 'shiftable vertically in front ?of the hopper and, the bag,? one rod of the lower ring being connected with; the lower end of said'rrod, and a hook carriedby the vertical rod and shiftable thereon to verti cally adjusted positions, said hook being shifted vertically with the rod into positionforf engaging the upper ring and ?holding-a predetermined por-_ tion of the lowerend portion of said bag in vup wardly folded position to?close the lower 'end' of the bag and retain sand in the bag.