US1694763A

US1694763A - Palmes

Info

Publication number: US1694763A
Authority: US
Publication date: 1928-12-11
Anticipated expiration: 1945-12-11

Description

Dec. 11, 1928. 1,694,763

W. H. BEATTY I CENTRIFUGAL MOLDING APPARATUS Filed Aug. 24, 1927 2 Sheets-Sheet l 24 E V TH Attorney Dec. 11, 1928. 11,694,763

w. H. BEATTY CENTRIFUGAL MOLDING APPARATUS Filed Aug. 24, 1927' 2 Sheets-Sheet 2 0 w &

' Inventor wfiofleatzlz I Alforn'ey I E 1 rue: as

WILLIAIYI H. IBEAT'IY, OE BIRMINGHAM, ALABAMA, ASSIGNOB TO BEATTY PALMER AND IBEATTY, A CQIPARTNEESHIE? COMPOSED' OF N. EIEIKTRY BEATTY, CLARENCE J.

PALMER, AND "WILLIAM H. BEATTY.

CENTRIF UGAL MOLDING .APZFARATUS.

Application filed. August 24, 1927. Serial No. 215,066.

My invention relates to centrifugal molding machines and has for its object the provision of apparatus of the character designated which shall be simple and rugged in its construction, and which shall embody means for readily mounting and removing the molding flask at the beginning and at the encling of the molding operation.

My invention has more particular relation to centrifugal molding machines employing a sand mold with a suitable flask therefor. In connection with such apparatus, the molds are first prepared in the flasks, away from the machine, and are then mounted on suitable mechanism for rotating them while the molten metal is being poured and the casting formed. They are then taken away from the machine for the purpose of removing the casting while another flask and mold is put in place for further pouring and casting, It will be obvious that with such apparatus, the machine should be so designed that the flasks may be readily mounted and removed from the machine, thereby reducing the time element and labor involved in the process. It is accordingly the principal object of my invention to provide a machine for accomplishing the above mentioned purpose, and at the same time simplify the construction of such .ma

chines while producing a machine which shall be as rugged or more rugged than machines already known to me.

Briefly, my invention comprises a pair of spaced pedestal members having provided therein suitable bearings for a pair of idler rollers, one being positioned slightly above and to one side of the other, the idler rollers being so positioned that the flask, when in place, is only slightly to the rear of the vertical central plane passing through the lower idler roller and lies entire- 1y to one side of the other idler roller. A driven roller adapted to drivev the flask by frictional engagement therewith, is so positioned that its vertical central plane is on the same side of the axis of rotation of the flask as the lower idler roller. The driving roller has a shaft mounted in bearings carried by, and eccentrically disposed with respect to, a bushing which, in turn, is mounted in suitable bearings in the spaced pedestal-s. A gear is carried by the bushing and meshes with a segmental gear having suitable operating means secured thereto and which is pi medon one of the pedestals. When the segmental gear is operated, it imparts a rotary motion to the gear carried by the bushing, and the rotary motion of the bushing serves to raise or lower the shaft of the driving roller. A belt drive is provided for the driving roller and is so positioned as to be tightened when the roller is lowered to engage with the flask.

Apparatus embodying features of my invention is illustrated in the accompanying drawing, forming a part of this application wherein Fig. 1 is a front elevation of the apparatus, with parts of the flask broken away;

Fig. 2 is a sectional view taken along the line II-II of Fig. 1;

gig. 3 is an end elevation of the apparatus; an

Fig. 4 is a view in elevation of one of the idler rollers removed from the machine.

Referring to the drawing for a better understanding of my invention, 1 show, in Figs. 1 and 3, a base member 10 having mounted thereon a pair of spaced

pedestals

11 and 12. A pair of

idler rollers

13 and 14 each comprising two roller members, are disposed be tween the pedestals and have shafts 16 and 1'? carried by suitable. bearings in the pedestals.

A flask 18 containing a mold 19 may be mounted on the

rollers

13 and 14. The roller 14, Fig. 4, is provided with flanges 15 which cooperate with runners 20, provided on the flask 18 to hold the latter in place. It will be noted that the

rollers

13 and 14 are so positioned that-the flask 18 rests on the upper periphery of the roller 13 and only slightly to the rear of the central vertical plane thereof. The roller 14 is so positioned that the flask 18 rests entirely against the front side thereof, so that it acts as a stop for the flask when putting it in place and holds it in such a position that it may be readily removed without lifting. At 21 is indicated a platform which may be of any suitable design and by means ot which the flasks are rolled into place in the machine and removed therefrom.

It will be apparent from the arrangement of the rollers, that a flask may be rolled into place for the operation of casting without danger or fear of displacement of the mold, and after the molding operation is completed it may be readily removed from themachine with the espenditure of very iittlf effort By this arrangement, I am enabled to greatly reduce the time required for casting as well the effort required to place the flasks in position in the machine and remove them.

Arranged above the idler roller 13, and slightly forward of said roller, is a friction driving roller 22 adapted to rotate the flask 18 by frictional engagement therewith. The driving roller 22 comprises two roller members constructed of suitable friction material, many forms of which will suggest themselves to those skilled in the art. For exampde, I have found what is known commercially as friction paper very satisfactory for this purpose. The roller 22 is carried by .a shaft 23 which is journaled in bearings 24 carried by a pair of similar bushings 26 and disposed eccentrically with respect to said bushings. The bushings 26 are in turn journaled in bearings 27 provided in the

pedestals

11 and 12 so as to be freely rotatable in said bearings. With this arrangement, upon rotation of the bushings 26, the shaft 23 may be raised and lowered and the roller 22 brought into or out of frictional engagement with the flask 18. By placing the driving roller 22 slightly forward of the idler roller 13, it exerts a force, when in frictional engagement with the flask 18, tending to force the flask 18 toward the roller 14; and thus holds the flask firmly in place between the idler rollers.

Each of the bushings 26 is provided with a gear 28 arranged on the outer end thereof. The gears 28 mesh with segmental gears 29 carried by a shaft 31 journalled in bearings 32, the latter being carried by the

pedestals

11 and 12. Secured to the shaft 31 is a lever 33 which coacts with a quadrant 34 carried by the pedestal 12. The lever 33 is provided with a latch 36 which engages the teeth of the quadrant to hold the segmental gear 29 in any desired position and consequently determines the position of the shaft 23 and the driving roller 22. The shaft 23 is preferably driven in a counter clock-wise direction as viewed. in Fig. 3, by a rope belt 37 the latter being driven from any suitable source, not shown, and which is preferably arranged in a position above the shaft 23. The reason for driving the roller 22 in a counter clock-wise direction is to cause the flask 18 to bear more tightly against the idler roller 14 in rotation. By so arranging the belt 37, it will be obvious that upon raising the roller 22, the belt is slackened and upon lowering said roller the belt is tightened.

The upward n'iovement which may be transmitted to the shaft 23 by the segmental gear 29 and the gear 28 is sufficient to permit the mounting of a flask in position in the machine for the molding operation and to remove the flask therefrom. lVhen the flask 18 is in position, as shown in Fig. 1 of the drawing, molten metal is introduced into the mold as by means of a spout 38 which, as is well understood in the art, may be entered into the open end of the mold and retracted therefrom as the molding operation is carried out. lVhile the molten metal is being poured, the roller 22 is held in frictional engagement with the flask and the flask is rapidly rotated. As soon as the molten metal has been poured the lever 33 is moved upward, s viewed in the drawing, raising the shaft 23 and rollers 22 free of the flask. Thus, the imparting of rotary movement to the flask 18 and the freeing of the flask so that it may be readily removed is accomplished by one movement of the lever 33. lVhen this has been done, the flask 18 may be readily removed from the machine and disposed of in any desired manner known to the art.

From the foregoing it will be apparent that I have devised an improved centrifugal molding machine wherein the molding flasks may be readily placed in position and removed therefrom, and wherein means are provided for disengaging the flask and stopping the motion thereof in one operation.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications, without departing from the spirit thereof, and I desire, therefore, that only such limita tions shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

Vhat I claim is:

1. In a centrifugal molding machine, a pair of idler rollers for supporting a flask, a driving roller, means for imparting rotary movement through the driving roller to the flask, and means for raising and lowering the driving roller to permit the mounting and removal of the flask from said supporting rollers.

2. In a centrifugal molding machine, a pair of idler rollers for supporting a flask, said rollers being so disposed that the flask rests upon the upper periphery of one of the idler rollers and entirely to one side of the other idler roller, a driving roller for rotating the flask, a shaft for the driving roller, means for transmitting rotary movement to the shaft, and means for moving the shaft to disengage the driving roller from the flask to permit the mounting and removal of said flask from the machine.

3. In a centrifugal molding machine, a flask, a lower supporting roller, a lateral supporting roller so positioned as to maintain the flask on the upper periphery of the lower roller, a driving roller arranged above the flask and adapted to drive said flask by frictional engagement therewith, and means for raising and lowering the driving roller.

4. In a centrifugal molding machine, a. flask, a lower supporting roller, a lateral supporting roller so positioned as to maintain the flask on the upper periphery of the lower roller, a driving roller arranged above the flask and adapted to drive said flask by frictional engagement therewith, means for raising and lowering the driving roller to free it from and engage it with the flask, a belt drive for the driving roller and so disposed that upon engagement of the roller with the flask the belt is tightened.

5. In a centrifugal molding machine, a pair roller, a shaft for the driving roller, bearings for the last mentioned shaft mounted in the bushings and eccentric thereto, gear means for rotating the bushings, and means for operating the gear means, whereby the driving shaft and its roller are raised or lowered by reason of rotation of the bushings.

6. In acentrifugal molding machine,aflask, a pair of idler rollers, said rollers being so positioned that the flask when in place for molding rests on the upper periphery of one of the rollers, a driving roller disposed above the flask and adapted to rotate said flask by frictional engagement therewith, a shaft for the driving roller, bearings for the shaft, a pair of bushings for supporting the bearings, said bearings being eccentric to the bushings,

gear means carried by the bushings, a segmental gear meshing with the gear means and manually operable means for operating the segmental gears.

7. In a centrifugal molding machine, a flask, a lower flask supporting idler roller, a lateral flask supporting idler roller disposed to the rear of the lower roller so that the flask when in position in the machine rests on the upper periphery of the lower roller with its long axis slightly to the rear of the long axis of the lower roller, a friction driving roller adapted to frictionally engage the flask and disposed above the flask with its long axis forward of the long axis of the lower roller, and means to raise and lower the driving roller to permit the mounting and removal of the flask.

8. In a centrifugal molding machine, a flask, a lower flask supporting idler roller, a lateral flask supporting idler roller disposed to the rear of the lower roller so that the flask when in position in the machine rests on the upper periphery of the lower roller with its long axis slightly to the rear of the long axis of the lower roller, a friction driving roller adapted to frictionally engage the flask and disposed above the flask with its long axis forward of the long axis of the lower roller, means to raise and lower the driving roller to permit the mounting and removal of the flask, and means to drive the friction roller in a direction to force the flask over against the lateral idler roller.

In testimony whereof I aflix my signature.

WILLIAM H. BEATTY.