US2567472A

US2567472A - Means for conditioning granular and like materials

Info

Publication number: US2567472A
Application number: US725633A
Authority: US
Inventors: Crandall Roy Carleton
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-01-07
Filing date: 1947-01-31
Publication date: 1951-09-11
Anticipated expiration: 1968-09-11

Description

Sept. 11, 1951 R. c. CRANDALL MEANS FOR CONDITIONING GRANULAR AND LIKE MATERIALS 2 Sheets-Sheet 1 Filed Jan. 51, 1947 INVENTOR. R'qy C. CrandaZZ BY 42424. 65%

I firney.

Sept. 11, 1951 R. c. CRANDALL 2,567,472

MEANS FOR CONDITIONING GRANULAR AND LIKE MATERIALS Filed Jan. 51, 1947 2 Sheets-Sheet 2 [n uen 2'07".-

Ray C. CrarzdaZZ Patented Sept. 11, 1951 umreoesrarss PATENT orr cs" MnssreewsmTmm-m cameras I ,.A1- roL1nEMsrEa1ALs 'Roy-Qarleton'Grandall, Tillsonburg, Ontario, U Canada Asp-mains anua y 1 1941, Serial. No. asses Inflanada January 77,, 19.47

"this inv ntion relates the h e'thbt an means ter aki g p and ondit nin g a ular mater a s..sueh as sand and he like.

a ious types of mach nes have be n p opo heretofore for ut ng and cen t en he ateri such as foundry sand to b ak up the lumps therein and render the same uniformly free flowina' H An ob ec o the pres nt invent on s to Prov an improved and simplified method and na-chine for cutt n p i drow ne; scr n n lump br ak ng, mp rin a d aerat n oundry s and the i e and f r removing rap and o the efro T e nve ti n includes he p ovi oho a 4 Claims. (Cl. 2091-262) thin P eierabl .selt-prepeHed'havi s as nel c n r or ad pted 'to'e t nd di ect t e ter al. und r atmen u wa yth oueh a c ute a d m ans. f defl ctin downwardly the at iali sui e f o he chu e- The inv n o w be d scr bed ith e erenc o he c omp n n d e a in whi h,

Figu e is a persp cti e side elevation o t ma h ne,

i ur 2 s a persp ct ve view, partly in. seeti h o the m a eon itiohineel ments f h mach e, 1

igu e 3 is an nd ele a on 01? the cuttin rotor and asse ated casin and Fi ur s d 6 are diagrammatic levational ie il st a in va ious operating steps of th device. e w I In he dr ing, l s a self-pr pelled vehicle of rd nary o s ruc i n prefe ably or the farm tractor type. The conditioning device 2 of the present invention is pivotally suspended from the vehicle by means of supporting arm 3 pivoted to a shaft 4 mounted in the rearward portion of the vehicle.

The conditioning device comprises a substantially semi-cylindrical casing 5 to which the lower ends of arms 3 are fi-xed and having it open side in rearwardly directed relation to the vehicle. Mounted within the casing is a horizontally disposed rotor '6, having an axial cylindrical member 1 carried by shaft 8 journalled in end plates 9 of the casing. Mounted on: the periphery of the member 1 on either side ofthe central portion thereof are one or more helical vanes or blades l0 and H, the pitch of the blades to the left of the center beingleft hand and the pitch of the blades on the right of the center e ng ri ht hand. whereby materilalv enga ed by the lades is conveyed ro either end of th asin tow r s the centralisation ther i. h inward ends of the helical bladesterminate in 2 t radially directed blades 12, constituting impellers adapted, to engage and direct upwardly bycentrifugal action the material conveyed thereto by the helical blades l0 and H.

The casin is provided at its central portion with a shield 11 3 to provide a cover memberfor the radial blades and an opening [4 is provided in the upper portion of the casing in line with the shield iii. A chute [5 extend upwardly and rearwardly of the casing and encloses the open* ing I to form a delivery chute for the "material directed therei-nto by the radial blades l2.

A deflector member 16 is carried by the vehicle in slightly elevated relation to the chute' outlet and having its end portion closely adjacent the chute. The deflector has a curved upper plate I? and downwardly directed side plates l8; The deflector is preferably formed in substantially two halves which meet about the line 19, the two portions of the upper plate being hinged at 20 so that the rearward half of the deflector may be raised to vary the trajectory of material deflected therefrom. The rearward end of the defleetor is also preferably provided with a downwardly inclined fiap portion 2| hinged at 22 to the upper plate. The flap 2| is formed of screening material.

Also carried by the vehicle directly below the deflector and substantially coextensive therewith is a fiat screen 23 having a stop 24 hinged to its rearward end, a screening stop 25 at its forward end, and a downwardly inclined screening'fla'p or apron 25 fixed to it forward end and slightly below the outlet of chute I 5. The screen 23 is provided with narrow side walls 21 and, as shown,

is longitudinally inclined, the end adjacent the chute being lower than the opposite end. Moreover, the

portions

28 and 29 of the screen on either side of its longitudinal axis are slightly inclined downwardly towards the sides. The rotor B i preferably driven from the shaf 8 by means of gears 30 and SI and chain drive 32. Shaft 8 is driven in any suitable manner,

' preferably from the prime mover of the vehicle.

Any suitable means is also provided for raising and lowering the rotor and casing to clear the sand piles orto place the same at floor level for engagement with a sand pile. A hoisting mechanism, preferably actuated by the vehicle power means, is indicated at 33. I

Angularly directed scrapers 34 may be DIO- vided at either end of the casing 5.

The edges of the helical blades may be serrated as indicated at 35 to provide more effective cutting.

Inoperation', the vehicle is moved rearwardly veyed inwardly by the helical blades into contact with the radial blades I2, which project a stream of sand upwardly through the chute l5 and into engagement with the deflector plate H. The lat-'- ter deflects the sand particles downwardly through the screen 23. This treatment thorough- 1y aerates the sand, as is desirable for foundry casting purposes. The flap 2|, preferably screened, acts as a stop for any pieces of metal or like scrap which may be present in the sand and tends to break up anylumps remaining in the sand.

As the sand passes through the screen, pieces of scrap and the like move over the inclined surfaces of the screen and collect in the lower corners or pockets 38.

When the device is employed for cutting and piling the sand, the rearward half of the deflector plate I! is raised to substantially the position shown in Figure 5, with the flap 2! also swun upwardly, as indicated, whereby the surfaces of such members are above the path or trajectory of the stream of sand issuing from the chute Hi. The stream thus continues beyond the end of the screen 23, the stop 24 of which is swung downwardly out of the way.

Following cutting and screening and/or piling, in the manner described, the rotor and easing are raised to the position shown in Figure 6, where upon the vehicle is actuated to move the machine 4 like materials including at one end thereof an upwardly directed chute having an inlet at its lower end and an outlet at its upper end, and means adjacent said inlet for projecting through the chute by centrifugal force an aerated stream of said material, a deflector plate carried by the machine and having one end overlying and in spaced relation to the chute outlet and its other end extending towards the other end of the machine, the lower surface of said plate being concave and disposed in intersecting relation to the normal trajectory of said stream as it emerges from the chute outlet to deflect the stream downwardly, said plate consisting of a forward section and a rearward section hingedly joined together along' a transverse line, said sections being upwardly swingable out of intersecting relation with the normal trajectory of the stream, a flat screen forwardly for return travel over the treated sand pile.

The machine described requires the services of but one operator and combines the functions of cutting, aerating, screening, lump breaking, scrap removal, and piling of foundry sand and like materials.

What is claimed is: 1. In a conditioning machine for granular an like materials including at one end thereof an upwardly directed chute having an inlet at its v lower end and an outlet at its upper end, and

means adjacent said inlet for projecting through the chute by centrifugal force an aerated stream of said material, a deflector plate carried by the machine, and having one end overlying and in spaced relation to the chute outlet and its other end extending towards the other end of the machine, the lower surface of said plate being concave and disposed in intersecting relation with the normal trajectory of said stream as it emerges from the chute outlet to deflect the stream downwardly, said plate consisting of a forward section and a rearward section hingedl joined together along a transverse line, said sections being upwardly swingable out of intersecting relation clined in an upward direction from said chute .outlet and transversely inclined in a downward direction from the longitudinal axis of the screen, said screen having stops at the sides and .lower end thereof to provide scrap-receiving pockets.

2. In-aconditioning machine for granular and screen having one end adjacent the chute outlet and its other end adjacent said other end of the deflector plate, a stop hinged to said other end of the screen, a stop flxed to said one end of the screen and extending upwardly therefrom, and a screened apron hinged to said one end of the screen and extending in downwardly inclined relation therefrom.

3. Ina conditioning machine for granular and like materials including at one end thereof an upwardly directed chute having 'an inlet at its lower end and an outlet at its upper end, and means. adjacent said inlet for projecting through the'chute by centrifugal force an aerated stream of said material, a deflector plate carried by the machine and having one end overlying and in spaced relation to the chute outlet and its other end extending towards the other end of the machine, the lower surface of said plate being concave and disposed in intersecting relation to the normal trajectory of said stream as it emerges from the chute outlet to deflect the stream downwardly, and a flat screen carried by the machine and having its major portion disposed directly below, and coextensive with, the major portion of said deflector plate to receive the stream deflected therefrom, said plate consisting of a forward section and a rearward section hingedly joined together along a transverse line, said sections being upwardly swingable out of intersecting relation with the normal trajectory of said stream to permit the stream to pass over the screen.

4. In a conditioning machine for foundry sand including a self-propelled vehicle having a forward end, a rearward end, an upwardly directed chute at said rearward end having an inlet at its lower end and an outlet at its upper end, and means adjacent said inlet for projecting through-the chute by centrifugal force an aerated deflected therefrom and being inclined in an upward direction from the rearward end of the vehicle, said plate consisting of a forward section and a rearward section hingedly joined together along a transverse line, said sections being-up wardly swingable out of intersecting relation with the normal trajectory of the stream to permit the stream to pass over the screen.

ROY CARLETON CRANDALL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Number 16 182.307

Name Date Marquardt Nov. 19, 1912 Wyble Sept.'16, 1919 Townsend Dec. 30, 1924 Simpson Apr. 21, 1925 Heisserman got. 12, 1937 Stevenson Jan. 18, 1938 James M5yf14, 1940 Burg Dec.",15, 1942 Miller Aug 7, 1945 FOREIGN PATENTS 7 Country Date Switzerland Beef 20, 1934