US1616112A

US1616112A - Casting machine

Info

Publication number: US1616112A
Application number: US534352A
Authority: US
Inventors: William E Clow
Original assignee: James B Clow & Sons
Current assignee: James B Clow & Sons
Priority date: 1922-02-06
Filing date: 1922-02-06
Publication date: 1927-02-01
Anticipated expiration: 1944-02-01

Description

Fe l 1927.

b w. E. cLow CASTING MACHINE Filed Feb. e, 1922 4 l v 1 n 1 .lllln/ J ik? mig@ www.

Patented Feb. 1, 1927.

WILLIAM E. CLOW, OF CHICAGO, ILLINOIS,

PATENT OFFICE.

ASSIGNOR TO JAMES B. GLOW 85 SONS,

" CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CASTING MACHINE.

y Application led February The present invention relates to casting machines of that type in which molten` metal is charged into a rotating mold and4 centrifugally cast against the interior sur-A face `ofthe mold. Its principal object is the provision of sucha casting machine prac'- tically operable for the eiticient and economical casting of hollow articles. The inven-l tion-provides a machine especially adapted for the production of elongated articles such as pipe, by charging molten metal onto the rotating mold surface at longitudinally `separated points and in such manner that the metal is directed onto the mold surface in .thefdirection of rotation thereof and at an acute angle with relation to the mold sur-v face. A preferred .form of machine embodying-the invention is illustrated in the'drawings and explained in the following description.

Figure 1 is a broken vertical section of a machine embodying the invention. Figure 2 is an end elevation thereof.

Figure 3 is a section on the line 3--3 in Figure 1. v Y

Figure 4 is an enlarged section of the distributing trough on the line 4--4 in Figure 1.

-The Imachine as a whole stands on a suitable concrete or other base 1. A lurality of suitable standards 2 are secure t0. the base and a casing 3 is ri idly and tixedly supported by the standar s. The casing 3 is preferably constructed of cast iron. A mold 4, preferably made of forged steel, is rotatably mounted within the casing 3. The mold may be conveniently mounted within the easing by securing a pair of spaced roller bearings 5 in the casing adjacent the .op-

posite ends thereof and supporting the mold on these bearings. A pulley 6 is secured to the mold at what may be called the rea-r end which projects beyond the casing and^ power may be suitably transmitted -to the pulley to rotate the mold at high speed. Preferably, ball bearings 7 and labyrinth or other suitable packings 8 are provided between the mold'and casing adjacent the opposite ends thereof. It is practically desirable to mount the ball bearmgs and packing at the rear end of the casing, so caged thatthey are incapable of movement with respect either to the mold or the casing. At the front end of the machine the bearing and packing are preferably secured in `a. cage e, 1922. serial No. 534,352.

which is incapable of longitudinal movement with respect to the mold but which has a sliding fit within the casing to provide for movement due to expansion of the mold during operation. Both ends of the mold` are open. At the rear end of the mold a flanged annular stop 9 is secured Vin the bore of the lmold. The front end ofthe mold. is enlarged -l'and secured therein isl a core 10 suitably Ishaped so that the bellf end of a pipe will be cast `between the opposing surfaces of-the core and the enlarged'bore of the mold. The

body of the core 10d-ray be formed of metal.

or sand as desired and may be -conveniently secured in place by having the mold project slightly beyond the front end of the casing and driving wedges throu h holes 11 formed in the projecting end of-t e mold.

A track 12 is supported on the base 1 and extends rearwardly from the rear end of the mold and casing. A carriage 13 is mounted on the track by providing the carriage with `wheels 14 rolling on the upper surface of the track and with wheels 15 engaging the under surface of the track. A distributing trough 16 is rotatably supported by the carriage 13 and this is preferably accomplished by providing the carriage with spaced standards 17 housing suitable antifriction bearings 18. di-

rectly supporting the trough. A worm gear 19 is secured on the trough and meshes with i 'a worm 20 journaled on the carriage and operable by a crank 21. Longitudinal movement of the carriage rearwardly from the mold withdraws the distributing trough from the mold so that a castv pi e may be withdrawn from the front end o the mold and so that the trough when desired Amay be j on avertical axis so that it may be swung out ofthe way after withdrawal of the trou h to allow removal of the pipe from the mol That portion of the distributing troughwhich is adapted to be projected into v the mold is preferably formed by a cast steel shell 25 lined with re brick or other refractory material 26. That portion of the distributing trough which lies within the mold when the trough is projected into tilling position is` formed with a plurality of longitudinally separated discharge sponts 27 and preferably this portion of the'trough is provided with an opening in its top and 'the spouts are formed in one edge of the opening. That portion of the trough which in filling position of thc trough projects beyond the front end of the mold and the casing is formed with a filling opening 28. That edge 29 which corresponds with the edge in which the discharge spouts arc formed extends to a higher level than the spouts. A transverse partition 30-is formed within the trough adjacent the rear end of that portion of the trough which lies within the mold. The casing 3 is provided with a water inlet 31 and a water outlet 32 connecting with the space between the casing and the mold so that cooling water may be freely circulated around the mold.

In operation, after the bell forming core has been secured in. the front end of the mold, the carriage is advanced to project the distributing trough into operative position, in which it is illustrated in Figure 1. The mold is then rotated at high speed. Molten metal is charged ,in that portion of the trough projecting beyond the front of the mold and casing. As soon as the trough is filled with molten metal the worm gear is operated to rotate the trough and pour the metal into the rotating mold. The high edge of the filling opening on the discharge side of the trough prevents an metal from y being spilled outside of the mo d and as the the mold durin trough empties the surplus metal in the projecting end of the trough will run back and be dischargednear the front end of the mold to cast the bell end of the pipe.A The dischar e outlets or spouts in that portion of the istributor or trough ositioned within the castmg operation are yso formed and sposed that as the molten metal is charged into the mold it will bei directed onto the rotating mold surface in the direction of rotation thereof and at an acute angle with relation to the mold surface. The molten metal is thus delivered to the mold surface quietly and without agitation, so that it may be said to be laid onto the mold surface. In the preferred machine illustrated,tl1e distributor isl rotated so that the molten metal is delivered onto the mold surface gradually. The discharge s outs through which the. molten metal ows from the trough into the mold are longitudinally separated so that the metal -flo'ws into the mold'and onto the mold surface in streams which are spa-ced apart along thel mold. Air and gas are permltted freely to esca inwardly from 'the mold sur. face toward t e axis of the mold between the inowing separated streams of metal, so thatv before the adjacent streams ofV metal flowed into the mold have united the metal has inwardly'displaced all air and gas. The trapping of air and gas between the metal and mold surface is wholly prevented and the resulting )ipe will be devoid of pockets, blow holes and other imperfections. After the pipe has been cast the distributing trough is withdrawn, the guiding roller at the front of the mold is swung out ot the way and the wedges holding the core in position are displaced, whereupon the pipe and core may be readily withdrawn from the frontend of the mold and the' core removed from the pi e.

Having thus described my invention', w lat I claim as new and desire to secure by Letters Patent of the United States is l.In a casting machine, the combination ot' an elongated rotary mold, and a distributor adapted to extend within the mold and provided with longitudinally separated discharge outlets adapted to direct molten rmetal onto the mold surface at an acute angle and in the direction of rotation thereof.

2. In a casting machine, the combination of an elongated rotary mold, and a rotatable distributor adapted to extend within .the mold and provided with longitudinally separated discharge outlets.

3. In a casting machine, the combination of an elongated rotary mold, and a rotatable ydistributing trough adapted to extend within the mold, the trough being open at the top and provided along one edge of the opening with longitudinally separated discharge spouts.

4. In a casting machine, the combination of an elongated rotary mold, and a rotatable distributor ada ted to extend within the inold and provided with longitudinally separated discharge'outlets adapted to direct molten metal onto the mold surface at an acute angle and in the direction of rotation thereof.` f

5. In a casting machine, the combination of an elongated rotary mold, and a rotatable distributor ada ted to extend within the mold and provi ed with longitudinally separated discharge outlets, the distributor being provided with a filling opening beyond one end of the mold.

6. In a casting machine, the combination of an elongated rotary mold, and a rotatable distributor adapted to extendwithin the mold and to project beyond one end thereof, the portion of the distributor within .the mold being open at the top and provided along one edge of the opening with lonvitudinally separated discharge outlets, t e projecting portion being provided with a filling opemng, the edge thereof corresponding with said outlet e ge b/eing higher than the outlets. e

lill) 7. In a casting machine, the combination ,of an elongated rotarymold; a longitudinally movable carriage, and a distributor supported by the carriage and adapted to be projected within the mold, thel distributor .being provided with longitudinally separated discharge outlets adapted to dir'ect molten metal onto the lnold surface at an acute angle and in the direction ot' rotation thereof, and being provided with a lilling opening beyond one end ot' the mold.

In a. casting machine, the combination ot' an elongated rotary mold, a longitudinally movable carriage, and a distributor rotatably supported by the carriage and adapted lo be projected within the mold, the distributor being provided with longitudinally .separated discharge outlets.

S). In a casting machine, the combination ot' an elongated rotary mold, a longitudinally movable carriage, and a distributor rotatably supported by the carriage and adapted to be projected Within the mold, the distributor being provided with longitudinally separated discharge outlet-s, and being provided With a filling opening beyond one end of the mold.

'10. In a casting machine, the combination ot an elongated rotary mold, a longitudinally movable carriage, `a distributor rotatably supported by the carriage and adapted to be projected Within the mold, the distributor being provided with longitudinally separated discharge outlets, and means for rotating the distributor gradua lv.

11. In a casting machine, the combination of an elongated rotary mold, a longitudinally movable carriage, a distributor rotatably supported by the carriage and adapted to be projected Within the mold, the distribntor being open at the top and provided along one edge of the opening with longitudinally separated discharge outlets, .and means for rotating the distributor gradually.

12. In a casting machine, the combination of an elongated rotary mold open at its ends. a longitudinally movable carria e mounted at one end of the mold, and a istributing trough rotatably supported` by the carriage and adapted to extend through-`r the mold and to project beyond the opposite end thereof, the portion of the trough Within the mold being open at the topl and provided along one edge ofithe opening with longitudinally separated ldischarge spouts, tli'e projecting portion of the trough being provided with an opening in its top, the edge thereot' corresponding with said spout edge being higher'. than the spoutsl i3. In a casting machine, the combination of an elongated rotary mold open at its ends, a longitudinally movable carriage mounted at one end ot' the mold, a distributing trough rotatably supported by the carriage and adapted to extend through the mold and to project beyond the opposite end thereof, the portion of the trough Within the mold being open -at the top and provided along one edge of the opening with longitudinally separated discharge spouts, the projecting portion of the trough being provided with an opening in its top, the edge thereof corresponding With said spout edge being higher than the spouts, and. means for rotating the trough gradually.

In Witness whereof, I hereunto subscribe my name this 3rd day of lFebruary, 1922.

WILLIAM E. GLOW.