Патент USA US2132165код для вставки
Oct. 4, 1938. > ' _ F_ B, HENRY 2,132,165 FOUNDRY SAND CONDITIONING APPARATUS Filed Dec. 13, 1935 ml 5 Sheets-Sheet ' Fl 6' g? 23 -- 5'> Fly! l8 " 8G ‘\‘j/ 1 8 a vG I6 [532 _ ,/ ' I7 43 52/ " I 5 \ Q 0 C> ‘5G \ _ 1 . ‘34 8,7 ' :77 ‘a2 . I ' , 2° IOG , GI _ Ei G2 =10 .2 v3' 20 \67 a2 f/vvs/vToR: J Fred 5. Henry, _ - “I F459. 3 BY MM‘ w W, ATT'Y Oct. 4, 1938. 2,132,165 ‘F. B. ‘HENRY FOUNDRY SAND CONDITIONING APPARATUS Filed Dec. 13, 1935 5 Sheets-Sheet 2 fAj/vENTOFx’: Fee’ 5. Hen/"y, I BY U. m: ATT'Y . Oct. 4, 1938. 2,132,165 F. B. HENRY FOUNDRY SAND CONDITIONING APPARATUS Filed Dec. 15, 1935 3 Sheets-Sheet 5 //\/ VE/Y TOR . Fred 5 ?enry) BY A7754 Patented Oct. 4, 1938 . ' 2,132,165 UNITED :STATES PATENT OFFICE ‘ 2,132,165 FOUNDRY SAND CONDITIONING APPARATUS Fred B. Henry, Columbus, Ohio, assignor to The Jeffrey Manufacturing Company, a corpora tion of Ohio Application December 13, 1935, Serial No. 54,294 11 Claims. (Cl. 209-320) My invention relates to portable foundry sand frame 8. The protecting canopy l5 may be rig conditioning apparatus adapted for use in small foundries or in foundries where complete condi tioning plants of the stationary type are not used, idly connected to the frame H and the steering post l2, as shown in Fig. 4. A drawbar l6 pivoted at I‘! to the steering post I2 is provided at the and one of the objects of the invention is the ' front end with a pulling handle l8, as shown in provision of improved and e?icient apparatus for Figs. 1 and 2. screening foreign material from used foundry Used foundry sand may contain such foreign '} sand and aerating the screened sand for re-use in materials as pieces of metal of various shapes and foundry work. 10 - sizes, refuse, etc., and also caked lumps of sand, . Another object of the invention is the provi sion of improved apparatus for separating ceré tain materials and directing the same to conven ient locations for ef?cientrhandling. ‘ Another object of the invention is the provi sion of a sectional ?ail for aiding the reduction of large particles of foundry sand into smaller particles. ' Still another object of'the invention is to pro vide a grating to separate large size foreign mat 20 ter from the foundry sand as it is fed to the sand conditioning apparatus. A further object of the invention is to provide an adjustable de?ector to guide the sand to a pile or windrow. Other objects of the invention will appear [3 VI hereinafter, the novel features and combinations. being set forth in the appended claims. In the accompanying drawings, Fig. 1 is an elevation of my improved portable 30 foundry sand conditioning apparatus; Fig. 2 is a plan view of the structure shown in Fig. 1; Fig. 3 is a rear view of the structure shown in and moreover a pile of used foundry sand on the 10 foundry ?oor may be wet ununiformly at the bottom and therefore not in condition for use un til after having been mixed and aerated. When ‘ the material from such pile is shoveled into the hopper l9 while the apparatus shown in Fig. 4 is being operated, the foreign material will be transferred continuously to the transverse chute 20, and the usable foundry sand will be directed to the ejector mechanism for aerating and mix ing the sand and throwing it along the open bot 20 tomed inverted chute 22 out from the rear end of the machine through the atmosphere into a pile remote from the machine. The hopper I9 is mounted on a supplemental frame 23 which in turn is mounted on the main 25 frame 8 so as to be longitudinally tiltable rela tively thereto. Preferably, two pairs of spaced apart springs 24, 24 are mounted on opposite side of the supplemental frame 23. Each of the springs 24 may be retained in place by means of 30 an inverted cup-shaped bracket 25 which is bolt ed at 26 to the inner wall of the supplemental frame plate 23 in position for the cylindrical Fig. 1; boss 21 to project into the upper end of the Fig. .4 is an enlarged longitudinal sectional ele vation of the portable out?t shown in Figs. 1 and 2, taken on the line 4-—4 of Fig. 3, looking spring 24. A horizontal bracket 8' projects in in the direction of the arrows; Fig. 5 is a transverse sectional elevation taken 40 on the line 5—5 of Fig. 1, looking in the direc tion of the arrows; Fig. 6 is an enlarged perspective view of the sectional ?ail; and Fig. 7 is a detail taken on the line ‘I, ‘l of Fig. 4, looking in the direction of the arrows and show ing the latching means for the adjustable de flector. Referring to Figs. 1 to 4 inclusive, it will be seen that the portable sand conditioning appa ratus comprises a vehicle having the main frame 8 mounted on the rear wheels 9, 9 and the front steering wheel ID. The single front wheel I0 is mounted on a frame I I having a vertical steering post I2 with a reduced portion l3 journaled in 55 the front bearing l4 at the front end of the main 35 wardly from one of the sides of the frame 8 in position to receive the lower end of the spring 24. The head 28 of a bolt 29 may be used as a re taining boss for the lower end of the spring 24. The lower edges of the cup-shaped brackets 25 40 are spaced sui?ciently above the bracket plates 8’ to permit longitudinal tilting of the supplemental frame 273 relatively to the main frame 8. Secured to the supplemental frame 23 is a hopper 30 located below the screen 3| so as to 45 move bodily therewith. In order to reinforce the screen and keep the same from sagging, a longi tudinal bar 32 may be secured at its ends to the‘ upper ends of the hopper 30 midway between the sides of the screen 3|, as shown in Fig. 5. Welded to vthe inner side walls of the hopper H! are abutment plates 33, 33 as shown in Figs. 4 and 5. , Longitudinal strips 34, 34 welded to the longitudinal edges of the screen 3| may be locat ed on the horizontal edges 35, 35 of those portions 2 2,182,166 36' 36' of the hopper 36 which are located at the The armature shaft 62 must be rotatedin a sides of the supplemental frame 23. Retaining plates 36, 36 are provided at their lower edges with beveled extensions 31, 31 which are adapted to engage the upper sides of strips clockwise direction as viewed in Fig. 4, so that the belt 64 will travel in the direction of the ar rows 15 because the shafts 43 and 52 must rotate in clockwise directions, as viewed in Fig. 4. This 5 34, 34. Bolts 38, 38 may be relied on to secure the retaining plates 36 with their upper edges in engagement with the lower edges of the abut produceqa gyratory movement of the supple - ment plates 33' and with their lower beveled ex 10 tensions 31 in engagement with the upper strips 34, thereby not only securing the screen 3| in connection with the supplemental frame 23 but also holding said screen under lateral tension. The longitudinal central bar 32 cooperates with 15 the lateral edge supports to maintain the screen 3| in a horizontal plane during operation. _ In order to effect such vibration of the screen 3| as ‘to transfer foreign material or unscreened material rearwardly along the screen 3| to the 20 transverse chute 26, I have provided gyratory vibrating mechanism for the supplemental frame 23. By referring to Figs. 4 and 5, it will be noted that upper bearing blocks 39, 39 and lower bear 25 ing blocks 46, 46are rigidly secured to the main frame 8 at the sides thereof. J ournaled by means of the ball bearings 4| , 4| in the ?xed bearing blocks 39, 39 are the reduced end portions 42, 42 of the transverse shaft 43. At the inner .ends 30 of the reduced extensions 42 are eccentrics“, 44 which are journaled by means of the ball bearings 4.5, 45 in the ends of the tubular transverse hous ing 46, the ends of which are rigidly secured to the side walls of the hopper l9 and to the side 35 walls of the supplemental frame 23. At the inner ends of the reduced extensions 42 adjacent to the eccentrics 44 are keyed the ?y ‘wheels 41, 41 to rotate with the shaft 43. Weights 48 may be detachably connected by means of bolts 40 56 to either or both of the?y wheels 41 and these weights may be so arranged as to counterbalance the throw or momentum of the supplemental frame and the screen thereon, relatively to the‘ is for the reason that the eccentrics 44 must mental frame in a clockwise direction, as viewed in Fig. 4, thereby transferring unscreened mate rial vor foreign matter rearwardly along the screen 10 3| to the chute 26. That is to say, by rotating the shaft 43 in the direction of the arrow 16, as shown in Fig. 4,"the eccentrics 44 will vibrate the screen 3| by moving the same upwardly and rearwardly thereby throwing the foreign mat- l5 ter toward the chute 26 in step by step move ments. The shaft 52 must rotate in a clockwise direc tion as indicated by the arrow 11 on Fig. 4 so as to engage the material and transfer it by im- 20 pact along the upwardly and rearwardly inclined discharge passageway which has a closed top and an open bottom, having an inverted U-sha'pe as shown in Figs. 3 and 5. The mixture of used sand and foreign matter 25 which is shoveled into the‘ hopper I9, is prevented by the rear wall 16 thereof from going beyond a position back of a plane' extending through the rear portion of the tubular housing 46. To pre vent screened material from accumulating on top 30 of the tubular housing 46 a de?ecting plate 5| (Fig. 4) is provided to de?ect the material there from. Thus the screened material passing‘. through screen 3| will be guided by the hopper ' 36 including the laterally inclined walls 36' best 35 seen in Fig. 4. The screened material will thus be compelled to slide from the walls .of the hop per 36 into the discharge opening in the bottom thereof and consequently the distance which the screened material falls by gravity will be short- 40 ened and its descending velocity decreased. The discharge passageway 22 is in the form- of an inverted U-shaped frame or chute detachably main frame, and thereby lessen the vibration of bolted at 19-and 86 to the main frame 8. The rotor comprising the spiders 54, 54 and the ?ights 45 Spaced below the transverse shaft 43, as shown 59, 66, is mounted at the rear end portion of the in Figs. 4_and 5, is a transverse shaft 52, the ends ' passageway 22 intermediate the ends of the frame of which are journaled by means of the ball bear- ' 8 and adjacent to the opening 8| through which ings 53, 53 in the bearing blocks 46, 46. . material is received from the hopper 36. ‘An aux Keyed to the shaft 52 intermediate the ends iliary hopper 82 may be mounted on the inverted 50 50 thereof are two spiders 54, 54 each having a _ chute 22, as shown in Fig. 4, not only-to direct , pair of radial arms 55, 56 to the outer ends of the screened material into the upper side of the which are detachably connected by means of the cylindrical path of the ?ights 59 and 66, and bolts 51, 58 the ?ights 59 and 66, as shown in afford immediate free mixture of air therewith, but also to intercept the gravity fall of some of 55 55 Figs. 4 and 5. Mounted at the upper rear portion of the main I the material, thereby decreasing its velocity and frame 8 ‘is an electric motor 6|, as shown in assuring its being acted upon by the impact of thev Figs. 1 to 4, inclusive. Mounted at the outer end ?ights 59 and 66 when in the dotted line posi of the armature shaft 62 is a pulley 63 adapted tion shown in Fig. 4. The rotation of the shaft the ‘main frame 8. v , 60 to drive a belt 64 which is in engagement with the V-shaped grooves 65' and 66’ of the pulleys 65 and 66 which are respectively secured to the shafts 43 and 52, as shown in Fig. 5. The pulleys 63, 65 and 66 may be protected by the covering 05 casing 61 which encloses the three pulleys 63, 52 in a clockwise direction as viewed in Fig. 4 60 should be at such speed as to assure the impact ing of substantially all of the material by the“ ' ?ights 59 and 66; However, it is preferred to have the discharge passageway provided with an. open bottom so that such material as is not dis- 65 The ?y wheels 41, ’ charged from the rear end of the machine, may 41 may be provided with the canopies 69, 69. fall on to the ?oor under the frame 8. Lubricating connections for the ball bearings Inasmuch as Fig. 5 is a section taken on the 65 and 66 and the V belt 64. 45, 45 may be provided as indicated at 16, 16. 70 Likewise, lubricating connections may be pro vided for the ball bearings 4|, 4| as indicated at 1|, 1|. Provision may be made‘for lubricating ,the ball bearings 53, 53 as indicated at 12, 12. The shafts 43 and 52 may be held against end 75 wis'e movement as indicated at 13, 13 and 14, 14. line 5--5 of Fig. 1, looking rearwardly, the trail ing face of each of the ?ights 59, 66, as viewed in 70 Fig. 5, and in Fig. 3, is shown to be V-shaped. The leading face 63 is also V-shaped. When the rotor operates in a clockwise direction as viewed in Fig. 4, the leading face 83 moves in the direction of the arrow 11. Since the leading 75 3 2,132,165 face 83 of each of the ?ights 59 and 60 is re ceding or V-shaped when viewed in plan while in a top or bottom position, the screened mate rial will receive such impacts as not only to aerate the same but also to mix the same thor oughly during its discharge from the rear end of the machine. That is to say, since the im pact faces of the ?ights are in intersecting planes, the material will be thrown diagonally across the 10 inverted U-shaped chute from opposite vsides, thereby thoroughly mixing or blending the screened sand into a homogeneous mixture by the time it reaches the pile of screened and aer ated sand spaced back of the machine. Adjacent‘the discharge end of the inverted 15 chute 22 I preferably provide an adjustable in verted U-shaped de?ector 90 pivotally mounted at 9| on the main frame 8 by spaced angle mem bers 92 each of which is provided with a plu 20 rality of spaced holes 93 adapted to receive se lectively the latch end of an adjusting rod 94, the other end of which is pivoted at 95 to the de?ector 90. As best seen in Fig. '7, each of the rods 94 has a right angle end portion 96 which is adapted to be inserted in the selected hole 93, and said rods each carry a sliding block 9‘! having an extending lip 98 adapted to engage an angle member 92 and to retain the rod 94 locked in the hole 93. It is evident that by sliding the 30 block 91 upwardly along the rod 94, the end por tion 96 may be freed and removed from the hole 93. In addition to the structure already described, it is to be noted that the hopper I9 is provided 35 with a removable preliminary grating screen I00 comprising spaced bars placed on edge and con nected at their rear ends to an upwardly ex tending back board |0|, which grating screen together with the back board |0| as a unit, is 40 removably attached to the hopper I9 by wing nuts and bolts I02. It is evident that this grating screen I00 will perform a rough screening of the foundry sand and will be effective to remove any contained large pieces of foreign matter, such 45 as iron, and any unduly large lumps of caked sand. These large particles will slide by gravity along the grating bars I00 by reason of the in clination shown in Fig. 4 and will drop over the front of the device where they may be readily 50 removed, or if of caked sand, they may be broken up, as with the shovel of the operator. The un screened material moves forwardly from the grating screen I00, but the unscreened material on the screen 3| moves rearwardly. 55 In addition, I employ a ?ail I03, best seen in Figs. 4 and 6 which is formed of ?exible material such as fabric or-rubber and is attached at one end to the bottom of the rear wall ‘I8 of the on the housing 46 at the abutments 85, 85 made integral with the housing 46, which in addition act as spacing and centering abutments for the lower portion of the walls 30’, 30'. ~ Inasmuch asthe foundry sand conditioning ap paratus shown in the accompanying drawings is relatively small, it may be very readily pulled manually to any desired location in a foundry, and electric connection made at 86 to the motor 6| from any suitable electric power outlet in the foundry, and the motor may be started and stopped by means of the push-button switch 81, shown in Fig. 1. The screen 3| may be readily removed for cleaning or repair or for replacement by a screen of a different mesh. The flights 59 15 and 60 may be varied in number and each may be removed for repair or replacement. Although the portable conditioning apparatus is particu-' larly adapted to the cleaning and blending of foundry sand, it may have a general application 20 and I therefore prefer to mount the inverted chute ‘22 for detachment from the frame 8 so that if desired it may be cleaned. In some in stances, such as when light material in powdered or desiccated form is to be aerate-d, the screen 3| may be entirely omitted or replaced by a rela tively large mesh screen. It should also be noted that if the screen 3| is omitted and the granu lated material will ?ow with su?‘icient freedom from the bottom of the hopper 30’, 30', the‘belt 30 64 may be replaced by one shorter in length and connected between the pulleys 63 and 66 only, so as to cut out the pulley 65. That is to say, when it is ‘not necessary or desirable to vibrate the supplemental frame relatively to the main frame, the pulley 65 may be disconnected from the motor so that only the pulley 66 will be driven in a clockwise direction, as viewed in Fig. 4. How ever, as above explained, when the machine is to be used in foundries for reconditioning used foundry sand, I prefer to combine the separating mechanism with the rotor and rely on the latter for its ‘fan action and cutting and impact action to separate the particles of screened sand, and thoroughly aerate and mix or blend the same for re-use in future foundry work. ' In the operation of the device, used foundry sand will be fed, as by a hand shovel, to the hop per I9 where it will ?rst be preliminarily screened by the grating I00, which will discharge large foreign matter or caked sand over the front end of the device. The sand passing through grating I00 will be subjected to a vibratory screening ac ' tion on screen 3| and those particles which do not readily pass through screen 3| will be con veyed by the motion thereof rearwardly. After passing under baffle plate 88, the ?ail I03 will reduce the reducible portions of the .foundry hopper I9. Said ?ail I03 is slit longitudinally at sand and cause them to pass through screen 3|. 60 I04 to form individual sections I05 which may The irreducible portions of the sand and foreign 60 be weighted by blocks I06 of metal or other heavy . matter, such as nails and iron, will pass to trough material bolted thereto. The ?ail | 03 will be effective to reduce any large lumps of sand which pass to the section of screen 3| rearwardly 65 of the wall ‘I8, thus aiding them in passing through said screen 3|, unless irreducible. The size of the particles which may pass under plate 20 and discharge at the side of the device. Inasmuch as the gyratory vibration of the sup plemental frame 23 imparts a rearward convey ing action to the unscreened material on the screen 3|, it is preferred that the lower sides of the ?ail sections shall have frictional surfaces for ‘I8 may be regulated by regulating the size of I engagement with the unscreened reducible lumps the opening at the lower edge thereof by adjust 70 ment of the elevation of the baffle plate 88 which may be secured in adjusted position by bolts 89 seen in Figs. 4 and 5. of granular material to assist in disintegrating such lumps for passage through the screen. The 70 more important feature of the ?ail sections, how ever, is that each individual section has a true Reverting to the hopper structure shown in ?ailing ‘action independent of the others. That Figs. 4 and 5, it will be seen that the walls 30', is to say, the ?ail sections will ?y up intermit 75 30' may be supported at their lower portions tently to various distances dependent upon the 75 4 2,182,165 nature of the sizes of the reducible lumps under the same, and each section will return by gravity with a ?ailing action with which co-operates the vertical component of vibration of the screen 3|. In other words, while the screen at each point thereof is vibrated circularly and produces a con thereunder on said screen, a ?ail attached at one end to said one side wall and extending there veying action in its own plane and a screening action transversely of such plane, the ?ail sec tions ?ap up and down individually to effect the separator. from away from said hopper and adapted to re duce reducible material which passes under said one side wall and to pass it through said screen, and means for effecting operation of said screen ' 2. In a foundry sand conditioning apparatus, the combination with a frame, of a screen sep of crushing blows intermittently on the ' arator carried by said frame, a feed hopper car reducible lumps of granular material before ried at the front end of said frame above said reaching the transverse discharge chute 20. screen, said hopper having one side wall extending When the caked material is easily granulated, the across the screen intermediate its ends having weights I06 may be omitted, but in some instances the bottom thereof positioned above the screen to when additional crushing force is necessary the provide an opening to allow material to pass 15 weights I06 are made larger to secure greater thereunder, a preliminary screening means car crushing forces on the individual ?ail sections. ried by said hopper adapted to make a rough sep Nevertheless, the freedom with which each flail aration of foundry sand and foreign matter, an adjustable ba?le carried by said one side wall section moves upwardly on its hinge will not in 20 terfere with the transfer of the irreducible mate “ adapted to be adjusted to vary the size of said 20 opening, a ?ail positioned above said screen and rial to the transverse discharge chute 20. The sand which passes through the screen 3| at the rear end thereof adapted to disintegrate will be directed by hopper 3| to auxiliary hopper reducible lumps of material which pass through said opening and to force the material through 82. Plate 5| will also aid in this action and pre v striking 25 vent an accumulation of sand on housing 46. The sand received by auxiliary hopper 82 will pass through opening 8! where it will be struck by impellers 59 and 60 which will throw the sand particles rearwardly along chute 22 in crossing pathways, thus mixing, tempering, cutting, blend ing, aerating and cooling the sand without de stroying the bond in the foundry sand by any scraping or raking action. The sand will flow in a stream rearwardly of the machine and form in a pile or windrow. The adjustable de?ector 90 may be adjusted to determine the position to which the sand is’ to be thrown. This particular adjustment is dependent upon the height of the pile being fed, or the distance rearward that it ' 40 is desired to throw the sand. The cutting or mixing action insures a homog enous mixture of silica and bond with a complete reduction of any large particles. The tempering, that is, the mixing of the water or moisture with the sand uniformly, is very e?iciently carried out with desired uniformity, thus insuring good molds which will not fall, yet which are not too moist in spots. Furthermore, by eliminating the neces » sity for any raking or scraping action to mix, cut, 50 temper or blend, the sand, the tendency to de stroy bond, incident to raking or scraping, is avoided. This application is a continuation in part of my prio'r application for a foundry sand condi 55 tioning apparatus, Serial No. 747,042, ?led Octo her 5th, 1934. Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope 60 of the invention as de?ned by the claims hereto said screen while permitting irreducible material 25 to pass over the end of said screen, said ?ail com prising ?exible fabric material formed in weight ed strips, and means for eifecting operation of said screened separator. , ' 3. In a foundry sand conditioning apparatus, arator carried by said frame,_a feed hopper car ried at the front end of said frame above said screen, said hopper having one side wall extend ing across the screen intermediate its ends having 35 the bottom thereof positioned above the screen to provide an opening to allow material to pass thereunder, an adjustable baffle carried by said one side wall adapted to be adjusted to vary the size of said opening, a ?ail positioned above said 40 screen and at the rear end thereof adapted to disintegrate reducible lumps of material which pass through said opening and to force the ma terial through said screen while permitting irre ducible material to pass over the end of said screen, said ?ail comprising ?exible fabric mate rial formed in weighted strips, and means for vi brating said frame to operatesaid screen sep arator. . ' - ' ~ 4. In a foundry sand conditioning apparatus, 50 the combination with a frame, of a screen sep arator carried by said frame, ba?le means extend ing across the screen intermediate its ends having the bottom thereof positioned above the screen to provide an opening to allow material to pass thereunder, a ?ail positioned above said screen and at the discharge end thereof adapted to dis integrate reducible lumps of material which pass through said opening and to force the material through said screen while permitting irreducible 60 appended, and. I therefore wish not to be re material to pass over the end of said screen, said stricted'to the-precise construction herein dis- - ?ail comprising ?exible fabric material formed closed. ' g Having thus described and shown an embodi ment of my invention, what Idesire to secure by 65 Letters Patent of the United States is: 1. In a foundry sand conditioning apparatus, so the combination with a frame, of a screen sep in strips carrying weights, and means for vibrat ing said frame. ~ 5. In screening apparatus, the combination with a support, of a screen, a discharge chute at ~ the combination with 'a frame, of a screen sep the rear end of the screen, mechanism for vibrat ing said screen with a motion to effect a transfer arator carried by said frame, a feed hopper car 70 ried by said- frame and positioned above said of unscreened material rearwardly to said dis charge chute, a ba?ie plate mounted over said screen, said hopper extending only part way screen and between the ends_thereof to act as a across said screen with one side wall intermedi- ate the ends of the screen and positioned there above an amount to de?ne a restricting ori?ce to gate to regulate the passage of unscreened mate rial toward said discharge chute, ‘and a ?ail, formed ‘of ?exible rubber and. weighting means 75 permit a controlled amount of material to pass and positioned between said ba?ie plate and chute 2,132,185 5 ‘ to reduce any reducible material and force it through said screen before it reaches said chute. 6. In a screening apparatus, the combination various sizes of lumps of granular material on the screen, mechanism for supporting said ?ail in yielding contact with the screen, and means for with a frame, of a supplemental frame, a screen mounted on said supplemental frame, a baiiie ex and relative longitudinal movements between the tending transversely of said screen intermediate ?ail and the screen. vibrating said screen to secure relative vertical ' its ends having its lower edge slightly spaced 10. ‘In screening apparatus, the combination above the screen thereby forming a restricting gate through which material passes, a coarse with a screen, of a ?ail comprising a ?exible sheet 10 screen at the feed end ‘of said ?rst named screen and on the feed side of said ba?le, means con structed and arranged to vibrate said supplemen tal frame to cause material to pass through and over both of said screens, the material passing 4.1 through said coarse screen being received by said ?rst namedv screen for further screening and the larger particles moving along said ?rst named screen under said baffle to the discharge end thereof, and a ?ail extending from said baiiie to ward said discharge end and resting on said screen to disintegrate reducible material on said ?rst named screen. _ '7. In screening apparatus, the combination with a'frame, of a screen, means for vibrating said screen withv respect to said frame, and a ?ail posi tioned above and resting on said screen to dis integrate reducible lumps of material thereon, said ?ail comprising ?exible strips of non-metallic material carrying weights. 8. In screening apparatus, the combination with of friction material slotted to form sections adapt ed to rest on a portion of said screen and each 10 section individuallyweighted, means for support ing the ?ail from the unslotted end’ thereof while said sections rest by gravity on the aforesaid por tion of said screen, and means for imparting a gyratory vibration to said screen-to secure trans 15 fer of unscreened material along the screen under the ?ail and a relatively ?ailing action between, the weighted ?ail sections and the screen trans versely of the latter to effect disintegration of the‘ reducible material for passage through said screen, and a chute in position to receive from the screen after passing under said ?ail sections the irreducible material transferred over the screen and off the same. _ ' . 11. In a foundry sand conditioning apparatus, the combination with a frame, of a screen sep arator carried by said frame, a primary feed hop per carried at the feed end of said frame above said screen, said hopper having one side wall ex tending across the screen intermediate its ends ‘ a screen, of a sectional fabric ?ail with a weight having the bottom edge thereof positioned slight on each section tending to hold by gravity the ly above the screen to provide an opening to al low material to pass thereunder, a ?ail positioned above said screen at the discharge end thereof sections on the top surface of the screen, means for supporting one end of each section while the other end thereof is free for up and down move ment, and means for operating said screen to effect such up and down movement of the free outside said hopper adapted to disintegrate reduc ible lumps of material which pass through said opening to force the material through said screen end of said flail sections to crush the reducible “ while permitting irreducible material to pass over material between the ?ail sections and the screen. 4.0 9, In screening apparatus, the combination with a screen, of a ?ail of ?exible rubber material slotted to form sections to facilitate contact with the discharge end of said screen, said ?ail com prising ?exible weighted fabric material, and 40 means for operating said screen separator. FRED B. HENRY.