US1512536A - Foundry mixer - Google Patents

Description

Oct. 21 1924.

T. A. HIBBINS FOUNDRY MIXER Filed March 26 1924 2 Sheets-Sheet l T. A; 'HIBBINS FOUNDRY MIXER Filed March 26 1924 2 Sheets-Sheet 2 Patented Oct. 21, 1924.

UNITED STATES PATENT OFFICE.

THOMAS A. HIBBIN S, OF WELLSVILLE, OHIO, ASSIGNOR TO THE STEVENSON COMPANY,

OF WELLSVILLE, OHIO, A CORPORATION OF OHIO.

FOUNDRY MIXER.

Application filed March 26, 1924. Serial No. 701,967.

To all whom it may concern:

Be it known that I, THOMAS A. HIBBINS, a citizen of the United States, and a resident of Wellsville, in the county of Co lumbiana and State of Ohio, have invented certain new and useful Improvements in Foundr Mixers, of which the following is a speci cation.

My invention relates to mixers particularly adaptable for mixing sand and ingredients for foundry use, and the object of the invention is to introduce features of construction and arrangement which will facilitate the manufacture and operation and greatly increase the efficiency.

My improved mixer is disclosed on the accompanying drawing, in Which- Fig., 1 is a plan view,

Fig. 2 is a side elevational view,

Fig. 3 is an end elevational view with the cam and mixing parts in section on line 3-3, Fig. 1,

Fig. 4 is a side elevational view of the discharge door controlling lever mechanism, and

Fig. 5 is a sectional view on plane 5-5, Fig. 1.

The supporting framework for the mixer comprises the circular wall or bottom 10 secured by means of lugs 11 to the pillars 12 which seat on the concrete foundation or piers 13. The bottom wall has the rim 14 within which is inserted the cylindrical container wall 15 in the form of a band whose ends are secured together by a tie plate 16.

. This cylindrical wall together with the bottom wall forms the container or receptacle for the material to be mixed.

Centrally of and cast integral with the bottom wall is the vertical bearin frame 17 for receiving the transmission s aft 18.

Supported and bearing on top of this bearing frame is the propulsion head 19 which intimately receives the upper end of the shaft 18 and to which it is secured by a key 20 against relative rotational movement. A

plate 21 spans the top of the head and the screw 22 supported thereby threads into the shaft to assist in suspending it and to adjust it vertically. The plate 21 has the slot 23 for receiving the tapered key 20. The frame 17 is lined with a bearing bushing 24 and between the upper end of the frame and the head bearing washers 25 land 26 are interposed, an oil duct 2'7 leading through the head to the bearing surface between the washers. At its upper end the frame 17 has the peripheral annular wall 28 extending into the annular groove 29 in the head 19 to form seal for preventing sand or dust from reaching the bearing surfaces. The frame 17 has also the oil inlet 30 to the annular oil pocket 31 for providing lubrieating oil between the shaft and the bushing 24.

At the lower end of the shaft is secured the bevel gear 32 which meshes with the drive pinion 33 on the cross shaft 34 journaled in bearings 35 supported in the U- frame 36 depending from the bottom wall 10 at opposite sides thereof. It will be understood that this shaft 34 will be connected either directly or by belt and pullay with an electric motor or other driving source.

Resting on the bottom wall 10 between the frames 17 and rim 14 is the wearing plate 14' preferably of steel, over which plate the pressure roll or muller m travels. The muller comprises the hub 37, the web 38, and the rim 39, the rim being surrounded by a semi-steel tire 40. Within the hub is the bearing bushing 41 having the flange 42 at its outer end which engages against the web 38 and is secured thereto by screws 43. The muller structure is journaled on the stub shaft 44 extending outwardly from the end of the arms 45 which is hinged at its other end on the pin 46, this pin extending through the spoke 47 which extends from the propulsion head 19. The muller supporting stub shaft 44 extends radially with reference to the head 19, and the pin 46 is parallel with the stub shaft. The stub shaft is received at its inner end in the collar 48 at the free end of the arm 45 and is locked against longitudinal displacement by means of the ring 49 secured to the end of the collar and engaging in the slot 50 in the stub shaft. The stub shaft has the diametral threaded passageway 51 therethrough which is in register with the dia- I Extending upwardly and then laterally to overhang the collar 48 is the bracket 55. through'which' the rod 54 extends. The rod has the supporting head 56 which engages to any-desired degree the pressure transmittedby the muller structure to the material to be treated. The lock nut 57 is pro I vided for locking the rod after an adjustment has been made.

The ,outer end of the collar 48 is diametrally expanded to form the bearing cup 58 for reeeivingthe inner end of the muller hub 37, the opposed surfaces being conical and suitable hearin or packing material 59 being inserted. firidging the outer end of the stub shaft is the retaining frame 60 whose base receives the shaft end, and extending through the yoke of the frame and thread ing axially into the shaft is the screw 61. A key 62. secures the retaining frame against rotation. Between the frame and the flange 42 of; the muller is interposed a washer 63 of bearing material, the muller being thus journaled on the stub shaft between the retaining frame and the bearing cup 58 on the arm 45, and by adjusting the screw 60 the muller hub will be retained in proper bearing engagement without lost motion and the washer and packing material will prevent access of dirt, sand or other matter to the bearing surfaces. To afi'ord further protection a cap frame 64 is secured to the muller web by the screws 43 and receive the shaft end together with the retain- I ing frame thereon. As the shaft 18 and propeller head 19 are rotated the muller will be rolled around on the plate 14' in the directionof the arrow indicated on Fig. 1. and will engage with the material to be treated to exert the desired pressure and other action thereon.

Extending from the end of the spoke 47 is the pivot stud 65 which hinges the inner end of the arm 66 which at its outer end has the downwardly extending vertical wall 67 for supporting the plow blade 68. The lower end 68' of the plow blade is curved forwardly and the blade is set at such angle that when it is bodily carried with the spoke 47 along the pan floor any material on the oor will be deflected inwardly toward t e oan axis, the trailing end of the blade being in front of the muller so that the material will be deposited in the path of the muller to be subjected to the muller pressure and mulling action. The outer edge of the plow blade extends close to the cylindrical container wall 15 and acts to remove accumulated material from such wall.

The plow blade is adjustable laterally, it having the lateral slots 69 receiving the bolts 70 secured to and extending from the supporting wall 67 of the arm 66. After adjustment the bolts are tightened and the blade securely held. Any wear on the outer edge of the blade can thus be readily taken up. The blade is held down by its own weight, but its degree of engagement with or its distance from the pan fioor may be regulated by means of a set screw 71 threading through the lug 72 on the arm 66 and abutting against the lug 7 5 on the spoke 47. The blade can thus be adjusted to eliminate frictional engagement thereof with the pan floor and so reduce wear.

Extending from the propulsion head 19 in a direction opposite to that of the spoke 47 is the bracket 74 to which is secured the vertical plate 75 for supporting the plow blade 76. The plow shown extends from the bearing frame 17 to within a distance of the container wall 15 its outer end curving gradually in a direction opposite to that in which the plow is bodily carried when the device is in operation. The plow serves to deflect the material in advance of it outwardly towards the wall 15 from where the material is then deflected inwardly again by the plow 68. The screws 77 which support the plow extend through vertically elongated openings 78 so that the plow may be adjusted vertically with reference to the bottom 14 of the container and to compensate for wear.

r At one side of the mixing container its floor has the rectangular discharge opening 79 for which the trap door structure 80 is provided. The door structure is secured at its inner end to the inner end of the horizontal shaft 81 journaled in outer and inner brackets 82 and 83 respectively, the inner bracketbeing supported from the lug 84 extending downwardly from the container bottom. On the top of the door structure is the wearing plate 85 which, when the door is swung t0 upward position, fills the discharge opening 79 and is then in register with the main wearing plates 14. Below the dis charge opening and trap door is chute 85 which is supported in any convenient mannor from the machine framework and from which the discharged material is received in wheelbarrows or other conveyors to be carried to the desired destination.

To the outer end of the trap door supporting shaft is secured the controlling lever 86 which extends horizontally when the trap door is closed. On the rim 14 is supported the bracket 87 to which the looking lever 88 is pivoted at its upper end, this lever normally hanging vertically downwardly against the abutment projection 89 on the frame 87. At its lower end the arm 88 has the laterally extending foot 90 against whose flat base the operating lever 86 normally engages to be locked in its normal horizontal position. The foot has the handle extension 91 by means of which the locking structure may be readily swung. When the operating lever is locked in its normal position by the foot 90 the abutment 92 on the door structure will be against the container bottom and the door structure will be in closed position. Where it is desired to discharge the mixed contents the locking lever is swung upwardly in clockwise direction as indicated in dotted lines Fig. 4, and upon release of the operating lever the weight of the door structure will cause it to swing downwardly and the operating lever to swing upwardly. The upward swing of the operating lever will be limited by the locking structure, the lever eventually engaging with the top side w of the foot 90, this top side being preferably well rounded as indicated in Fig. 4. The door structure has also the abutment 93 which limits the downward swing of the door by engaging against the base of the bracket 83, and such abutment engaging together with the engagement of the locking foot with the upwardly swung operating lever will support the trap door in its open position. After discharge of the machine contents the lever 86 is swung back to its normal position, and the locking lever 88 will follow and bring its foot 90 into locking position over the lever, the door being then held securely in closed position while another batch of material is bein mixed and treated.

The material to be mixed is shoveled or dumped into the container and the machine is then started. The plow 68 deflects the material inwardly into the path of the muller which by its weight and rolling action mixes and mulls the material. In the Wake of the muller the plow 76 deflects the material outwardly along the container bottom and so, by the action of the plow and the muller, the material is shifted back and forth and thoroly mulled and mixed. The muller and the plow 68 are unrestrained in their upward bodily movement so that they will be relieved from all strain as they engage with the unevenly piled material'whlch they encounter. By means of the adjustment mechanism described the muller may be permitted to exert the full weight or only partially, depending upon the material and distance. After a mixing operation the batch can be readily discharged by operating the controlling lever 86:

I do not desire to be limited to the exact construction and arrangement shown and described, as changes can be made which toward said head, a stub shaft extending laterally from the inner end of said arm, a muller journaled on said stub shaft, a suspension bracket on said head, and a suspension rod extending from said bracket and having adjustable supporting engagement 35 with the inner end of said arm whereby the working pressure of said muller may be "adjusted.

2. In a mixing machine of the class described, the combination of a cylindrical container, a vertical axially extending bearing in said container, a propulsion head journaled on said bearing, a drive shaft secured to said head and journaled in said bearing, driving means connected with said shaft, a propulsion spoke extending laterally from said head, a. propulsion link hinged at its outer end to the outer end of said spoke for vertical swing and extending toward said head, a stub shaft secured at its inner end to the inner end of said arm and extending radially, a muller journaled on said stub shaft, a suspension bracket on said head, and adjustable suspension means between said bracket and inner end, of said arm whereby the working pressure of said muller may be adjuted.

3. In a mixing machine of the class described, the combination of a cylindrical container, a vertical bearing extending axially in said container, a propulsion head journaled on top-of said bearing, a propulsion shaft extending from said head and journaled in said bearing, driving means connected with said shaft, a spoke extending' laterally from said head, a propulsion link hinged at its outer end to the outer end of said spoke and extending inwardly parallel with said spoke, a stub shaft extending radially from the inner end of said link, a muller journaled on said stub shaft, a bracket on said head, a sus ensio-n rod adjustably secured to said stu shaft, and a stop on said rod for engaging with said bracket to limit the downward swing of 125 said arm and thereby the pressure engagement of said muller in said container.

4. In a mixing machine of the class described, the combination of a cylindrical container, a vertical bearing extending axially in said container, a propulsion head journaled on said bearing, a propulsion shaft extending from said head and journaled in said bearing, driving means connected with said propulsion shaft, a spoke extending laterally from said head, a propulsion arm hinged at its outer end to the outer end of said spoke and extending inwardlyparallel with said spoke, a stub shaft extending laterally from the inner end of said arm, a muller j ournaled on said stub shaft, a bracket on said head, a suspension rod having adjustable threaded connection with said stub shaft, said bracket having an opening through which the upper end of said suspension rod extends, and a stop on said suspension rod above said bracket for engaging with said bracket to limit the downward swing of said arm and thereby the pressure engagement of said muller on the material within said container.

5. In a mixing machine of the class described, the combination of a cylindrical container, a vertical bearing extending axially in said container, a propulsion head journaled on said bearing, a propulsion shaft suspended from said head and journaled in, said bearing, driving means connected with said shaft, a propulsion spoke extending laterally from said head, a propulsion arm pivoted at its outer end to the outer end of said spoke for vertical swing and extending inwardly, a stub shaft engaging at its inner end with the inner end of said arm and extending radially outwardly, a muller journaled on said stub shaft, a suspension bracket on said head, a suspension rod extending through said bracket and through said arm and stub shaft and having adjustable threaded engagement with said stub shaft, and a stop on the upper end of said rod for engaging with said bracket, to limit the downward swing of said arm and thereby the working pressure of said muller on the material in said container.

6. In a mixing machine of the class described, the combination of a cylindrical container, a vertical bearing extending axially in said container, a propulsion head journaled on top of said bearing, a propulsion shaft suspended from said head and journaled in said bearing, driving means connected with said propulsion shaft, a propulsion spoke extending laterally from said head, a propulsion arm pivoted at its outer end to said spoke for vertical swing and ex tending inwardly and terminating alongside of said head, a stub shaft extending radially from the inner end of said arm, a muller journaled on said stub shaft, arod extending through the inner ends of said arm and stub shaft and acting as a key for preventing rotation of said stub shaft, a bracket on said head having a passageway, said rod extending upwardly through said passageway and permitting upward swing of said arm, and a stop on said rod above said bracket for engaging with said bracket to limit the downward swing of said arm and thereby the working pressure of said muller, said rod having threaded engagement with said stub shaft whereby the downward swing of said arm may be adjusted for.

7. In a mixing machine of the class described, the combination of a cylindrical container, a bearing extending vertically and axially in said container, a propulsion shaft extending through and journaled in said bearing, driving means connected with the lower end of said shaft, a propulsion head connected with the upper end of said shaft and journaled on said bearing, a propulsion spoke extending laterally from said head, a propulsion arm pivoted at its outer end to said spoke and extendin inwardly, a stub shaft extending outwardly from the inner end of said arm, a muller journaled on said stub shaft, a suspension rod secured to the inner end of said arm to be vertically adjustable relative thereto, a bracket on said head having a passageway, the upper end of said suspension rod extending through said passageway, and a stop on said rod for engaging with said bracket to limit the downward swing of said arm and thereby the working pressure of said muller.

8. In a mixing machine of the class described, the combination of a container, a propulsion shaft extending axially in said container, a bearing for said shaft, a propulsion head on said shaft, a propulsion spoke extending laterally from said head, a propulsion arm pivoted at its outer end to said spoke to swing in a vertical plane, a stub shaft extending from the inner end of said arm, a muller journaled on said stub shaft, a second arm pivoted to the outer end of said spoke to swing in a vertical plane at an angle with the plane of swing of said first mentioned arm, said second mentioned arm extending outwardly and then downwardly, and a plow blade secured to the downwardly extending end of said second mentioned arm.

9. In a mixing machine of the class described, the combination of a cylindrical container, a shaft extending axially of said container, a bearing for said shaft, a propulsion head on said shaft, a propulsion spoke extending laterally from said head, a muller propulsion arm pivoted at its outer end to said spoke to swing in a vertical plane and extending inwardly, a stub shaft extending radially outwardly from the inner end of said arm, a muller journaled on said stub shaft, a plowpropulsion arm pivoted at its inner end to said spoke to swing in a vertical plane at an angle with the plane of swing of said muller propulsion arm and extending outwardly, and a plow blade supported from said plow propulsion arm.

10. In a machine of the class described, the combination of a circular container, a shaft extending axially through said container bottom, a bearing for said shaft, mulling and plow mechanism connected with said shaft to be carried around in said container, a driving gear secured to the lower end of said container shaft below said container, U- frames depending from diametrically opposite sides of said container, bearings supported on said U-frame, a cross shaft journaled in said bearing, means for driving said cross shaft, and a pinion on said cross shaft connected with said gear.

In witness whereof, I hereunto subscribe my name this eleventh day of March A. 1).,

THOMAS A. HIBBINS.

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