US1500707A

US1500707A - jaunstey

Info

Publication number: US1500707A
Authority: US
Publication date: 1924-07-08
Anticipated expiration: 1941-07-08

Description

July 8. 1924.

- w. T. JANNEY cuz qTRgFuGAL CASTING MACHINE Filed July 5 1922 3 Sheets-Sheet 1 July 8. 1924. 1,500,707 v W. T. JANNEY CENTRIFUGAL CASTING MACHINE 'Filed July 5, 1922 .5 Sheets-Sheet 2 July 8. 19 4- w. T. JANNEY CENTRIFUGAL CASTING MACHINE I 3 Sheets-Sheet 3 Filed July 5,

, I %Zfhnw fif Patented July 8, 1924.

n'mTsn STATE-S p 1 "1,500,707 PATENT, OFFICE. f

wan'rnn '1. JANNEY, or emLannLrI-rm, :enmisvtvanra.

CENTRIFUGAL CASTXNG MACHINE.

Application filed July 5,

To all whom it may concern:

Be it known that l, WALTER T. JANNEY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Centrifugal Casting Machines. of which the following is a specification.

My invention relates to centrifugal casting machines.

An important object in view is to provide a machine of this character with the parts so constructed and arranged that the sudden expansion of the mold which inevitablv takes place whenthe mass of molten metal is suddenly poured into it, will not subject any of the parts to undue strain and will not in any way affect the perfect operation of the machine.

Another object is to provide a revoluble member supporting a mold movable relatively thereto. and provided with means for yieldin ely holding the mold and support in operative relation to each other.

Still another object is to provide a revoluble support carrving a mold movable relatively thereto. with means for vieldingly holding: the mold and its support in operative relation to each other. with means for introduc ng an elastic fluid into the machine to cool the mold. I I

A further object is to provide a centrifugal casting machine having a revoluble support held against longitudinal movementon the machine and carrying a mold movable relatively to the support: and a ram also carried h v said support and movable relativelv thereto. and adapted to yieldinglv hold the mold in operative relation to the support. I Another ohiect is to provide a centrifugal casting machine havingei revoluble support carrying a mold formed in sections:

and havinn' means for centering the mold relativelvto the support and yieldingrlv holdinn the sections in operative relation to each other. i i f till another ohiect is to provide a centrii? HSI'Hl casting machine having a revoluble I I i e I 0 and 12 show a front-end and side view re.-

support carrying amoldmovable relatively thereto formed in sect ons; and havinn means for simnltaneouslv centering the" mold relativelv'to the support and vieldinpglv holding the parts inoperative relation to each other and yieldinnlvholding the 1922. Serial NO. 573,019.

mold as a whole inoperative relation to the support.

()ther objects will appear in the subjoined description.

An important feature of the invention consists of a revoluble basket; a mold carried by the basket and movable relatively thereto{ and electromagnetic means for yieldingly holding the mold in operative relation to the basket.

Another important feature consists of a revoluble basket having inclined faces at one end similarly disposed relativelv' to the axis of revolution of the basket and a ram at its other end movable relatively to the basket and also provided with an inclined face similarly arranged relatively to the axis of I revolution of the basket; and a-mold formed either integral or in sections and provided at its ends with inclined faces adapted to cooperate with the inclined faces of the basket and ram respectivelyg'and means for yieldingly pressin the ram against the mold to bring said respective inclined faces into, operative relation to each other, whereby the yielding pressure of theram against the mold simultaneously centres the mold relatively to the basket and yieldingly holdsit against circumferential and longit'udinalem pansion therein.

. The invention consists incertain novel features of construction and arrangement of parts, as will be hereinafter described and claimed. reference being had to the accompanying drawings in Whicht Fig. 1 1s a sectional view of my device.

Fig. 2-is aside elevation of the driving pulley and the electro-magnetic mechanism carried thereby. Fig. ,3 is a front elevaandFisr. 8 is a side elevation of Fig. 7;

while Figs. 9 and 10 are side and end views respectively of the casting formed by the mold illustrated in Figs. 7 and 8. Figs. 11

spectively of an undivided mold, While Fig. l3'sh'ows the castin'g form ed thereby; and, Fig. 14 is a side elevationofthe ram.

Attention is called in the outset to th that centrifugal force has been employed to fact i yie-ldingly hold the lids on centrifugal cast ing machines, which arrangement works very well when the molds are held sufliciently upright to hold the lids in operative position on them by gravity till the machinery is speeded up sufliciently to make the centrifugal mechanism grip the lids. But for the majority of castings the molds should be disposed horizontally, in which position gravity will cause the lids to fall off the molds before the machine starts revolving unless other means he provided for holding them in operative position until the centrifugal mechanism has been caused to revolve with sufficient rapidity to firmly press the lids.

lVith my arrangement no such difiicnlty can exist since the mold itself is the movable part and is yieldinglv held in a support which serves as a guide for its movements, so that it makes no difference whether the movement becontrolled by centrifu l force or springs, or any other force whatsoever.

Attention is also called. to the fact that the yielding means which I employ for yielding-1y pressing the molds, is so far removed. from the molds that it is not unfavorably affected by the heat therefrom.

Referring further to the drawings, the numeral 1 indicates a housing having a large central opening 2 atits forward end, and at its inner end an integral sleeve 3 into which is cast a long bearing 4, which supports a hollow shaft 5 having at its inner end an integral basket (in and carrying at its outer end beyond the housing 3, a drivingpulley 7 The basket 6 is provided at its open front end with an annular outwardly extending flange 8 having four equidistant inwardly extending flange lugs 9, said lugs having inclined faces 10 on their mner sides. Loosely fitting inside the'basket 6 is the mold 11 which may be either inte ral as shown in Figs. 11 and 12, or may be made in sec tions 12 as indicated in Figs. 7 and 8.

The integral mold is used for forming plain cylindriral castings 1.3.as illustrated in Fig. 13, while the sectional mold is suitable for casting cylinders such as are indicated by the numeral 14 in Figs. 9' and 10, in' which the cylinders have integral external rings 15.

The molds providedaround their open for 1 fiends-with inwardly extending annular-flanges 16 of a depth equal to the thickness ofthe wall of the casting to be formed. The mold is also provided at its ou-terend with four equidistant outwardly extending lugs 17 which have inclined outer faces 18 adaptedito. cooperate with the inclined faces 10 of the flange-lugs 9 of the basket 6. At their inner ends the molds are also pr0- vided with annular convex inclined faces 19 adapted to be engaged by the annular c0n cave inclined face 20 of the ram 21 mounted in the rear end of the basket behind the mold, and having an integral tubular stem 22 extending outwardly through the shaft 5 of the basket. The central opening 23 of the stem has the branches 2 at its inner end extending outwardly to the periphery of the ram, to connect the interior of the ram with the interior of the basket 6 around the mold. A t its outer nd the stem has a frusto-co'nical section 22*, and terminates at its extreme end in a threaded section 22*. A soft iron plate 26 having a hub 27 to add to the thickness of its central portion is rei ceived onto the frustoconical section 22 of the stem 22, and is jammed on said section by the nut 25.

The outer end of the ram-stem 22 has secured therein a nipple 28 to revolve with said stem; and an air-tight coupling con nects a stationary air hose 30 with the res volving nipple 28.

The pulley 7 which is mounted on the hollow shaft 5, carries on its hub a copper ring 31, which is insulated from the hub by a fibre collar 32. This copper ring, through the carbon brush and wire 34 is in continuous contact with a source of direct current energy. The pulley 7 has rigidly mounted thereon four soft iron cores 35- which are wound with insulated wires 36 each leading from the copper ring. These wires are wound in such a manner that the diametrically opposite cores will form n'1ag netic poles of opposite polarity, when a direct cert-cut passed into the copper ring 31 and thence through the wires 36 formingthe coils 37 around said cores, and thence returning through the'frame of the u'i rhire and the wire to the battery.

When a direct current is passed from the copper ring 31' through the coils 37, the cores 3'5 form a four-pole magnet, and as the plate '26 on the outer end of the ram stem 22 is made of magnetic material, it is drawn toward the magnetic poles, which causes the ram 21 to press the mold outwardly. A spring 39 holds the plate or armature 26 normally out of engagement with the cores 35.

The cover 4-0 at the front of the machine has two cars 41 rigidly connected at their upper ends to a. transverse shaft 4:2rotatably mounted in bearings 13 at the top of'the housing 1. The transverse shaft 42 is provided at its ends with right-angled sections 42 upon which are mounted the counterweight-s 4-4 for holding the cover raised when desired. A gravity latch 45 is pro-" vided for holding the cover closed when the machine is to be operated. This cover" pi erided at its centre with a pouring spout 46' provided with a suitable nonconductlng lining d7,

The operation of the device is as fol lows :-Supposing the parts to be disassembled with the ram 21 forced to its farthest position to the right by the spring 39, and the cover 4-0 at the front of the machine closed. The latch 45 is depressed by the foot of the operator, which permits the'two counterweights it to swing down ardly and raise the cover to open the front end of the ma hine. The mold is put into the basket 6 through the open front end of said basket and is turned sufticiently to bring the lugs l? oi the mold in behind the flange lugs 9 of the basl The front cover then drawn down to its closed position and engaged by the gravity latch 45. The direct current of electricity is then turned on through the wire 2:34: which, according to the arrangement already described, n'iagnetizes the cores 35 and draws the armature 26 toward them. This in turn forces the ram inwardly so that its annular concave face engages the annular convex face 19 atthe inner end of the mold and forces the mold outwardly bringing the inclined faces 18 of the lugs 17 into forcible engagement with the inner inclined faces 10 of the flange-lugs 9 of the basket 6. This serves to centre the mold in the basket, and if the mold be formed in sections as illustrated in Figs. 7 and 8, it will also yieldingly hold the sections in operative relation to each other. The basket is then caused to rapidly revolve by the pulley 7 which has suitable belt connection with a source of power. The metal is then poured through the spout 47 into the revolving mold. At the same time compressed air is turned into the basket through the flexible hose and the openings 23 and 24: of the ram connected therewith. As the mold is centred in the basket, there is a space around the circumference of the mold between the same and the basket, through which the air can freely circulate to cool the mold and basket If there is any excess metal poured into the mold, it escapes at the forward end thereof around the inner end of the spout 47 and flies out into the casing l. The sudden expansion of the mold (both diametrically and longitudinally) which takes place when the mass of molten metal is poured into it, is powerfully and yet yieldingly resisted by the magnetic pull upon the armature 26 at the outer end of the stem of the ram 21.

When the casting has solidified, the ma chine is stopped; the electric current and compressed air cut oil; the cover 40 swung up, and the mold and casting are removed from the basket with a pair of expanding tongs.

As the casting was hotter than the mold, it must contract more than the mold, and so may be easily jarred loose and slipped out of the mold; and then the above operation,

can be repeated.

aving now described my invention, what ters P i ii in ,centrifu oluble basket; a

and movable relatively thereto; a ram, the

basket and ram being provided with interior inclined surfaces and the mold with exterior inclined surfaces, and means for holding the mold in coaxial alinement with the basket with its inclined sin-faces yieldingly'pressed into engagement with the inclined surfaces of the basket and ram.

'2. In centrifugal casting machines, a revoluble support; a mold carried thereby and movable relatively thereto; means for yield ingly holding the mold in operative engagement with the support; and means for simultaneously revolving the mold a'ndfor applying a current of cooling fluid thereto.

3. In'centrifugal casting machines, a. revoluble basket; a mold carried therein and movable relatively thereto, said basket having stops for holding the mold against movement from the basket; and a ram for yieldingly pressing'the mold into engagement with said stops, the basket and mold and ram being arranged in coaxial alinement with each other.

4. In centrifugal casting machines, a revoluble basket; a mold carried thereby and movable relatively thereto; a ram and electrical means for operating the same to yieldingly press the mold into operative engage-' ment with the basket; and a spring for pressing the ram in a direction away from aim as new and desir to secure by Letthe mold; whereby to quickly disengage the ram from the mold when the electrical current is out oil.

5. In a centrifugal casting machine, a revoluble basket a mold carried thereby and movable relatively thereto; a ram for pressing the mold into operative engagementwith the basket; an armature attached to the ram; and electromagnets cooperating therewithto press the ram toward the mold.

6. In centrifugal casting machines, a revoluble basket having an open end; a section-- al mold carried within said basket and move able relatively thereto, a ram foryielding ly pressing the mold; the basket and ram being provided with oppositely disposed inclined surfaces; and the mold being provided with inclined surfaces adapted to be engaged by said inclined surfaces of the basket and ram, said surfaces being arranged for securely holding the sections of the mold in operative relation to each other when the mold is pressed by the ram.

7. Inv centrifugal casting machines, a housing open at its front end and a sleeve 6X- I tending centrally from its rear end; a revoluble basket in the housing, said basket having an open front end, and a hollow shaft extending from its rear end through said sleeve of the housing" in which it has bearing, the interior of the shaft opening into the basl-tetz a mold in the basket movably relatively thereto; a ram mounted in said hollow shaft and adapted to engage the mold; and means connected with the ram for yieldingly pressing the mold into operative engagement With the basket; and means for imparting rotation to the basket.

In centrifugal casting machines, a revoluble basket; a mold carried thereby and '10V2lbl6 relatively thereto, said mold being formed of a plurality of sections; and means for yieldingly holding the sections of the mold in operative relation to each other and also for yieldingly holding the assembled mold in coaxial alinement with the axis of the basket, said llOldlTlg means being responsive to the force of expansion due to heat but irresponsive to the strains due to the centrifugal force of the parts when the machine is in operation.

9. In centrifugal casting machines, a revoluble basket; amold carried thereby and movable relatively thereto, a rain arranged to yieldingly press the mold, the basket and ram being provided With oppositely disposed inclined surfaces" and the mold being provided with inclined surfaces adapted to be engaged by said inclined surfaces of the basket and rain, said cooperating surfaces being arranged for centering the mold relatively to the axis of the basket and yieldingly holding; it in operative relation thereto when pressed by the ram.

In testimony whereof I affix my signature.

WALTER T. JANNFY.