US1751766A - Casting machine - Google Patents

Description

March 25, 1930. J, w SMWH 1,751,766

I CASTING MACHINE I Filed Dec. 3, 1928 I 2 Sheets-Sheet 1 f'i 40 1 ax John w. Smith.

Patented Mar. 25, 1930 ENT OFFICE JOHN w. sm'rn, or CLEVELAND, OHIO cnsrrno Application Med December This invention relates to metal founding,

and more particularly to a new and novel centrifugal casting machine wherewith the casting of articles from molten metal may be promoted and facilitated and an. improved product obtained. Briefly stated, the ma-- chine is particularly constructed to support a sectional mold in quick detachable connection with a rotatable disk. Means for de- 1 livering the molten metal into the mold also formsan essential working part of the machine, and the delivery means is movably supported and adjustable vertically in respect to the rotatable disk to accommodate molds of different height. The delivery means is also especially constructed so that it may be tilted and rotated to direct a stream of molten metal at a 'ven angle against the vertical side walls of a rotatlng mold, or into molds in which the inner walls are located different distances from the axis of rotation. The machine also includes other desirable features as hereinafter shown and described and more concisely set forth in the claims, but in general my object is to provide a machine which will s1m lify and expedite casting operations an produce a dense and homogeneous casting free from internal cavities and defects.

In the accompanying drawings, Fig. 1 is a sectional view of the machine in a vertical lane, and Figs. 2 and 3 are. to views and ront elevations respectively. p and 5 are cross sectional views of the machine on horizontal lines 44 and 55, respectively, of .Fig. 3. Fig. 6 is a horizontal-section of the base portion of the machine, on'line 6-6 of Fig. 3. Fig. 7 is an enlarged ble, operatively related as in use, and showsectional view of the mold and pouring cruci macnmn a, 1928. Serial No. 323,407.

threaded shaft 7 is journaled at its upper and lower ends in brackets 8 riveted to standard 5 Within its channeled front, anda pair of --bevel gears -9 and 10, respectively, together with a hand wheel 11, serve to rotate the screw shaft when" the operator wishes to pro= duce vertical travel of a nut 12 in the chan nel. A laterally-extending arm 14 is attached to the front of nut 12, and a rigid shaft 15 projects forwardly from one end of arm 14 over a rotatable disk A situated centrally above table 3. A sleeve or tube 16 having telescopic connection with horizontal shaft 15 is provided with a Supporting ring or yoke 17 at its outer end wherein a delivery pot or hopper'B may be rotatably seated-in a tilting position above the open end of-a mold. C clamped upon the top of disk A. A thumb screw 18 or other suitable means fastens telescopic sleeve 16 to shaft 15, and when this thumb-screw is released the hopper may be shifted forwardly or rearwardly relatively to mold C and the vertical axis of disk A, or sleeve 16 which supports hopper B may be slipped free 'fromshaft 15 and the hopper bodily removed therewith from the machine without disturbing the mold or any other part. A rounded or spherically shaped enlargement-lQ annularly of hopper B rests within a correspondingly-shaped seat in ring- 17 to permit the hopper to be-tiltedjwithin spoutlimits, therebypermitting the delivery igs. 4 20 of the hopper to be raised or lowered and the angle of inclination thereof changed relatively to the open mouth of mold O; Set screws'21 in the sides of ring 17 may be used to lock and'hold the hopper'in any inclined position, and also against rotation after the hopper has been turned within the rin to a,

99, lation to the circular wall of the mold, say v 2 place spout 20 in any desired tangentia ice-- as indicated by the dotted lines a-a and b-b, in Fig. 4:. The proper delivery of the stream of molten metal lssuing from spout 20 against the curved inner wall of the mold is important in operating this machine, and ,the means outlined above permits varied ad:

justments of the-hopper and its spent to be p easily made' .preliminar to charging the mold. Furthermore, various sett ngs may be the main body of the mold is made in two semi-circular sections hinged together at one side so that it may be opened readily to remove the molded product, and the lining sections 22 are likewise made of semi-circular sections which abut or cometogether on the parting line of the main mold walls, see Fig. 5. The base portion 23 of one of the main mold sections is flanged and circular to perunit a set of clamping elements 24 to be drawn down thereon by bolts 25 having heads adapted to slide back and forth in ribbed or unde'rcut channels 26 radially at the top of disk A, therebypermitting molds of different diameters to be detachably connected with the 25 disk. The bottom ofthetmold is also provided with-a central aperture :27 to fit the reduced extension or tip 28 of the driving shaft 29 for the disk. In that way the mold may be accurately centered in respect to 30 the axis of revolution and an eccentric position easily avoided-when the mold is placed upon the disk. In casting a tubular roduct, for example, a cylindrical bearing o bronze or other alloyed metals, 3; round core member as 30 having a,,tapered projection '31 of reduced diameter atoits lower end is introduced into the mold. Tapered projection 31 isseated in a tapering opening 32 in the top face of the. closed bottom of the mold, and to-completely center the core member itsupper end is then engaged by a pointed centerin and holding screw 33 which is carriedby a ar 34 having a pivotal or hinge connection with nut 12, see Fig. 4. Accordingly when the mold s placed into position, or removed from disk A, bar 34' and itsscrewmay be lifted and tilted back against the standard out of the isk A isrevolved or rotated at a predetersupported in an upright position by a suitable bearing 35 in table 3 andby a ball bearing 36 at its lower end. A pulley 37 1s keyed to shaft 29, which pulley. encloses the ball bearing structure 36' fastened to bed plate 2, and poweriis applied to pulley 37 by a belt 38 which passes around a pair of dler pulleys 3939 at opposite sides of standard 5, see

, Fig. 6. Belt shifting devices may be used to mined speed by driving shaft 29, which is controlling thespeed of rotation of the mold, 1

shaft 41 oppositedrive pulley 37, see Fig. 1, v

and provide a foot treadle 42 (normally held in a raised position by a spring 43) to rock shaft 41 and apply braking friction to the pulley.

What I claim, is:

1. In a centrifugal casting machine, a rotatablesupport for a mold, a receptacle for delivering molten metal to the mold, and means for supporting said receptacle adjustably in different delivery positions opposite theinouthof the mold.

2. In a centrifugal casting machine, a mold rotatable about a vertical axis and open at its upper end, a receptacle for the molten metal having a discharge outlet opposite the open end of said mold, and a shiftable su port for said receptacle to permit the dlscharge outlet to be placed closely to the inner wall of said mold. 3. In a centrifugal casting machine, an open mold having removable interchangeable linings, means for rotating said mold about ,a vertical axis, and a receptacle for delivermg molten metal into said mold, said receptacle being adjustably supported to permit different delivery relations to be established upon interchange or removal of said linings.

4. In a centrifugal casting machine, rotatable means for supporting open molds interchangeably in an upright position, a receptacle for delivering molten metal into a mold mounted upon said means, and a device for supporting said receptacle adjustably in respect to the opening in any particular mold mounted upon said rotatable means to permit a stream of molten metal to be discharged against the inner wall of that mold.

5. In a centrifugal castingmachine, a rotatable sup ort for interchangeable molds, a receptacle or delivering molten metal into "any given mold mounted upon said support, and means for raising and lowering saidw receptacle relativ ely to the upper end of themold.

6. In a centrifugal casting machine, means for supporting molds interchangeably in corv responding upright rotatable positions, a receptacle for delivering molten metal into the upper end of any given mold so supported,

said receptacle laterally in respect to the wall of any given mold, and means for adjusting the vertical placement of the receptacle relai tively to the upper end of any given mold.

7. In a centrifugal Easting machine, a molding molten metal into the upper end of the means for adjusting the delivery" position of channeled member mounted to rotate about a centered mold, and means for positioning tal extensible supporting device for said re- ,said receptacle in offset relation to said vertical axis.

8. In a centrifugal casting machine, a rotatable member, means for securing an open mold ren'iovably in an upright position upon said member, a standard at one side of said rotatable member, and a receptacle detachably connected to said standard for deliveringmetal into the upper end of the mold.

9. In a centrifugal casting machine, a

vertical axis, a sectional mold having a base flange adapted to be seated centrally upon said member, and shiftable means within said channels for clamping said flange rigidly to said member.

10. In a centrifugal casting machine, amold supporting member rotatable about a vertical axis, a mold removably seated upon said member axially co-incident with said axis, a central core extending through said mold, and ashiftable centering and holding device for the upper end of said core.

11. In a centrifugal casting machine, a rotatable mold supporting member, an open mold seated upright upon said member, a core for said mold exposed at the open end of said mold, a centering holder engageahle' with the exposed part of said core, a receptacle for delivering molten metal into the open end of said mold, andmeans for effecting vertical adjustments of said rece tacle and .core holder to accommodate mo ds of different height.

12. In a centrifugal casting machine, a rotatable mold having a separate core, a receptacle for delivering molten metal into said mold, a holder for'said core, and a common means for elevating and supporting said delivery receptacle and core holder.

13. In a centrifugal casting machine, a retatable mold supporting member, a Standard at one side of said member, an elevating device supported by said standard, a recep-- tacle for delivering molten metal into a mold seated upon said rotatable member, said receptacle being detachably connected with said elevating device, and hinged means for holding a core member centrally-within the 14. In a centrifugal casting machine, a frame and a vertical shaft rotatabl mounted therein, a mold supporting mem er and a brake wheel affixed to said shaft, a delivery receptacle mounted upon said frame above said mold supporting member, and a manu ally operable braking device assoclated with said brake wheel to control the speed of revolutionof said shaft and mold supporting member.

{15. In a centrifugal casting machine, means for rotating a mold about a vertical axis, a receptacle for delivering molten metal into the upper end of said mold, a horizonceptacle, and screw means for elevating and lowering said supporting device.

16. In a centrifugal casting machine, a rotatable support for a mold, a race tacle for delivering molten metal into the mo d, a horizontally-adjustable support for said receptacle, means for elevating and lowering the said support for said rece tacle, and said receptacle being capable o rotatable adjustment relatively to the mold. 1

In testimony whereof I affix my si aturo. JOHN W. S TH.

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