US1802613A

US1802613A - Centrifugal casting machine

Info

Publication number: US1802613A
Application number: US22265A
Authority: US
Inventors: William H Millspaugh
Original assignee: Paper & Textile Machinery Comp
Current assignee: Paper & Textile Machinery Co; Paper & Textile Machinery Comp
Priority date: 1925-04-11
Filing date: 1925-04-11
Publication date: 1931-04-28
Anticipated expiration: 1948-04-28

Description

April 23, 1931- w. H. MILLSPAUGH CENTRIFUGAL CASTING MACHINE Filed April 11, 192

5 4 Sheets-Sheet 1 INVENTOR w/m/fi M/m BY w m April 28, 1931; w. H. MlLLSPAUG H 1,802,513

CENTRIFUGAL CASTING MACHINE Filed April 11, 1925 4 Sheets-Sheet 5 ATTQRNEYJ.

April 28, 1931. v w. H. MILLSPAUGH ,5

CENTRIFUGAL CASTING MACHINE Filed April 11, 1925 4 Sheets-Sheet 4 \(E TOR Patented Apr. 28, 1931 UNITED STATES PATENT OFFICE WILLIAM H. mLSPAUG-H, OF SANDUSKY, OHIO, ASSIGNOR TO THE & TEXTILE MACHINERY COMPANY, OF SANDUSKY, OHIO, A CORPORATION OF OHIO cnn'riarruenn oasrme mcrcmn Application filed April 11, 1925. Serial No. 22,265.

This invention relates to centrifugalcasting machines. 7

With the type of centrifugal casting machines in which the metal is poured into the I: end of the mold, and particularly where a refractory lining is used, it has been found difiicult to make long castings of uniform thickness and to secure a uniform distribution of the metal. This is due to the fact that he molten metal must flow over a considerable distance horizontally on a sand lining in order to reach the end of the mold opposite that into which the metal is poured. This invention has for its salient object to provide a method of making relatively long centrifugal castings of uniform thickness.

Another object ofthe invention is to provide a method of making long, hollow castings of the desired contour and thickness.

Another object of the invention is to provide an end pouring centrifugal casting machine so constructed and arranged that long, hollow castings of the desired shape and thiclmess can be made therein.

Another object of the invention is to secure in an end pouring centrifugal casting machine, uniform distribution of the metal.

Another object of the invention is to provide a tilting centrifugal casting machine that is simple in construction and practical and efficient in operation.

Further objects of the invention will appear from the following specification-taken in connection with the drawings, which form a part of this application, and in which Fig. 1 is an elevational view partly in section of a-machine constructed in accordance with the invention and adapted for use in carrying out the method of making castings.

Fig. 2 is a vertical sectional elevation taken substantially on line 2-2 of Fig. 1.

Figs. 3 and 4 are vertical sectional eleva tions taken substantially on line 33 and 44 of Fig. 1.

Figs. 5, 6 and 7 are sectional elevations illustrating different forms of castings that can be made by the method and machine hereinafter described. v

Fig. 8 is an enlarged sectional elevation of the closure for one end ofthe mold, and

Fig. 9 is an enlarged sectional elevation similar to Fig. 8, but showing the pourin end of the mold and the necessary mold an core construction for forming a bell end.

The invention hereinafter described re-' lates broadly to the type of machine disclosed in Wood Patent No. 1,533,780, granted April 14, 1925 and reissued February 19, 1929 as Reissue Patent N 0. 17,220 and assigned to The Paper & Textile Machinery Company, the assignee of this ap lication.

The method of ma 'ng castings consists briefly of pouring molten metal into a rotatable, inclined, hollow mold provided with a refractory lining as a sand lining, rotating the mold, and tilting the mold during its rotation to a more nearly horizontal position or, if desired, to a horizontal position. The apparatus for carrying-out the method consists of an elongated, hollow mold mounted for rotation on its longitudinal axis and also mounted to tilt on an axis transverse thereto. The metal is poured into the end of this mold preferably when the mold is tilted and after the metal has flowed longitudinally in the mold to a suflicient distance to insure its reaching the end of the mold and a uniform distribution of the metal, the mold is tilted back to a less inclined position and preferably to horizontal position. The mold will be rotated during the operations just described and preferably during the pouring of the metal into the mold and continuously until the metal being cast has set. Further details of the invention will appear from the following description.

The machine illustrated in the drawings is mounted on a bed 10. The bed 10 has mounted thereon at the central portion thereof, supports 11 for bearings 12in which there is mounted a transverse pivot shaft 13. The shaft 13 is secured to and extends through a frame work comprising I beams 14 and concrete 15 which fills the space between the I beams.

The I beams 14 and concrete 15 also have secured thereto at the ends thereof, extensions 16 and 17. These extensions may be formed inany desired manner but in the embodiment of the invention illustrated, the

extensions comprise

channel irons

18, 19, the

space between the opposite sets of irons being filled in by concrete or other suitable material 20.

A rotatable, elongated, hollow mold or mold casing 25 is supported above the frame work just described in bearings 26 and 27 mounted respectively on extensions 16 and 17 Each of these bearings, as shown in Fig. 3, comprises a pair of rolls 30, 31, disposed beneath the mold 25 and mounted in a frame 32 and a single roll 33 disposed above the mold and mounted in a removable hinged frame 34 hinged at 34a to frame 32. These rolls are freely rotatable and support the mold during its rotation. n

' One form of mold is shown in detail- 1n Fig. 8. The mold casing-25 has a sand lining 35 and one end is preferably closed by a sand disk or collar 36, which in turn is closed by a sand plug 37. A sleeve 38 having an inwardly extending flange 38a. retains the collar or disk 36 in position against the end of the sand lining and a cap 39 secures the plug 37 in position. The plug and cap may be vented, if desired as shown at 39a.

It will be understood that any other manner of plugging or closing .the end. of the mold may be used, if desired-or the end may be left open.

The mold may be driven in any desired manner but in the form of the invention illustrated, a motor40 is mounted on a casing 41 supported on a split casing 41a, 416, which is supported on the frame formed by the I beams 14 and concrete 15. Casing 41a is hinged to 41?) at 410 to facilitate the removal of the mold casin A ulley 42 is mounted on the motor shafi and drives a pulley 43 on the mold by means of a belt 44. The desired tension of the belt is maintained by means of a belt tightener 45. The tightener comprises an idler 46 mounted at one end of a lever 47, the lever being adjustable about its pivot 48 by means of a hand wheel 49.

When the mold is to be removed, the roll supports 34 and motor supports 41a are swung about their pivots 34a and 410 on their supportingstructures. 4

The tiltable frame of the casting machine is guided as it is tilted by vertical guideways 50 and 51 one of which is shown in Fig.

1 at the left hand end of the machine and which are shown on a larger scale in Fig. 4, and by similar vertical guideways 52 at the opposite end of the machine. Blocks 53 and '54 shown in Fig. 4 are carried by the frame formed by extension 17 and these blocks are slidably positioned with reference to the guideways 50 and 51. The upper ends of the guideways are connected by a transverse v member 55 which limits the tilting movement of the machine. I

Similar blocks 56 are carried by the exte ,sion 16 for engagement with the guideways ing the machine. tion illustrated, a cylinder 70 is-shown -as' 52 and the guideways 52 are connected by a transverse connecting member 57.

The pouring spout 60 is shown at the left hand end of the machine being adjustably mounted on a support 61 carried by extension 17 The spout has a nozzle 62 extending into the open end of the mold 25. A cap 63 is carried by the left hand end of the mold and a safety flange 64 is secured to the spout and extends overv the cap to prevent any metal from being thrown laterally from the periphery of the rotating mold. The nozzle 62 is smaller in diameter than the opening through the cap 63. It will be noted that the spout 60 although it tilts with'the mold, does not rotate. a

The form of pouring nozzle is not material and a half round spout, such as shown at 69 in Fig. 9, may be used, ifdesired.

The pouring end of the mold can be flared as shown at 65 in Fig. 9 to provide a bell end casting and a core 66 can be mounted in a central opening 68 to receive the pouring nozzle 69, which half round.

Any desired apparatus can be used for tilt- In the form of the invenin this instance is shown as mounted on the bed 10. This cylinder encloses a piston 71 to which there is secured a cable 72 which passes around idlers or guide pulleys 73 and 74 and is secured to the frame extension 17. A piston rod 75 is connected to the piston and extends through theend wall 76 of the cylinder being guided by a support 77. Any desired fluid may be'used in the cylinder 70, such as compressed air or hydraulic means and when the air or other fluid is admitted to'the cylinder through the pipe 78, the piston will be forced to the right (see Fig. 1) .thereby tilting the casting machine to some inclined position suchas that illustrated in dotted lines in Fig. 1.

In order to prevent the mold from shifting longitudinally, the mold has formed thereon or secured thereto,'-an-a-nnular collar or ring 80 which is positioned between the disks 81 and 82 mounted on vertical spindles which in turn are mounted in bearin s 83 carried by the frame structure formed y the I beams 14 and concrete 15.

In carrying out the method, the machine is preferably tilted to some position such as that shown indotted lines in Fig. 1, and the molten metal is poured into the spout 60, the nozzle 62 havin been moved into the 0 en end of the mold The mold is prefera 1y, although not necessarily, started rotating be-\ fore metal is poured into the mold and due to the inclination of the mold, the metal will flow downwardly toward the opposite end thereof. When the metal has flowed through extent to obtain a uniform distribution of the metal, the mold will be tilted downwardly by gravity, controlled by the escape of fluid through the pipe 78, preferably to horizontal position, and the rotation of the mold will be continued until the metal has set.

The form of casting obtained will depend on the form of the mold used and it will be understood that in the type of machine described, a lining or core, such as a sand lining, of suitable contour, is placed within the mold and this lining determines the shape of the casting obtained. If the lining has a cylindrical inner surface, a cylindrical casting uniform in thickness throughout its length can be obtained by the. method and machine described even though the casting is of great length. Such a casting is shown in %y using a lining of suitable shape, a casting such as that shown in Fig. 6 can be obtained.

Fig. 7 illustrates a casting thicker at one end than at the other. Such a casting may be obtained by suitably manipulating the tiltable mold and regulating its rate of rotation to position more metal at one end of the mold than at the other.

As above described, a bell end casting such as shown in Fig. 8 can be obtained by a suitable mold. I

Although one specific embodiment of the invention has been particularly shown and described, it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scopeof the invention, as expressed in the following claims.

What I claim is: 1. A method of making castings which consists of pouring molten metal into a rotatable, inclined, hollow mold, rotating said mold and tilting the mold to a substantial horizontal position as soon as the metal extends substantially throughout the length of the mold. 2. The method of making castings which consists in pouring molten metal into a rotating inclined hollow mold until the forward end of the stream of metal reaches the lower end of the mold, and tilting the mold to a substantially horizontal position before any moten metal has accumulated in the lower end of the mold.

3. An apparatus for centrifugal casting 1 comprising a rotary mold, a pivotalsupport therefor located near the longitudinal center of the mold, and adjacent the mold and means to drive the mold..

In witness whereof, I have hereunto set my hand this 7th day of April, 1925.

WILLIAM H. MHLSPAUGH.