US1469224A

US1469224A - Casting-ladle mechanism

Info

Publication number: US1469224A
Authority: US
Publication date: 1923-10-02
Anticipated expiration: 1940-10-02

Description

Oct. 2 1923.

J. B. LADD CASTING LADLE MEQHANISM Filed Sept. 15, iegl 7 WWI N709 J m 8 BY ATTORNEY Patented Oct. 2, 1923.

' UNITED STATES PATENT OFFICE.

JAMES B. LADD, OF ARDHORE, PENNSYLVANIA, ASSIGNOR TO UNITED STATES CAST IRON PIPE & FOUNDRY COMPANY, OF BURLINGTON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

Application filed September 15, 1921.

To all whom it may concern:

Be it known that I, J AMES B. LADD, acitizen of the United States of America, and resident of Ardniore, in the county of Montgomery, in the State of Pennsylvania, have invented a certain new and useful Improvement in Casting-Ladle Mechanism, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to casting ladle mechanism and has for its object to provide a mechanism which will insure a flow of molten metal of constant head and volume from the casting ladle to a mold.

My invention is of a special value and importance for use in connection with centrifugal casting machines of the type described in the German patent'to Briede, No. 242,307 of January 1, 1912, and in my co-pending application filed September 13, 1921, Serial No. 500,331, I have described and shown casting ladle mechanism adapted to maintain a constant head and volume of How in a ladle held stationary while pouring in combination with a casting machine of the type indicated and claimed in this combination. My present invention has to do'with a special type of mechanism for securing the kind of flow indicated and as such ladle mechanism is of use and value apart from the centrifugal casting mechanism I have not specifically limited my claims to the combination of the described mechanism"with. any particular form offc'asting machine.

The leading feature of my present invention consists in providing the casting ladle with a reservoir from which metal can be poured into it with afloat supported on the metal in the casting ladle and with mechanism actuated by the up and downmotion of this float for controlling the flow of metal from'the reservoir to the ladle. I

My invention will be best understood as described in connection with the drawings in which it is illustrated and in which-- Figure 1 is a side elevation partly in section of one form of mechanism embodying my invention, and

Figure 2 is also a side elevation partly in section of modified form of mechanism also embodying my invention.

Referring first to Fig. 1, AA, is one of two standards for supporting the ladles and coacting mechanism, these standards being Serial No. 500,848.

by which it is supported on the trunnion supports A. CC is a bracket secured to the bottom of the ladle, as shown, and C an upright standard secured at the rear top of the ladle. DD is a rock shaft secured to the standards AA; DD an operating lever and DD a lever secured to the rock shaft DD and connecting by a link DD with the bracket CC, as shown. E is the reservoir ladle having, as shown, a pouring spout E and trunnions E by which it is supported on the supports AA. E is a bracket extending out from the bottom of the ladle, as shown. F is a cylinder in which works a piston not shown, connected by a piston rod F and the link F with the bracket E G is a pipe connection for fluid under pressure connecting through a valve indicated at G and a pipe G with the bottom of the cylinder F. G is a lever armfor actuating the valve. H is an exhaust pipe leading from the bottom of the cylinder F and controlled by a valve H, and valve lever H I is an adjustable rod secured at its bottom to the valve lever G and having, as shown, a counterweightI also attached at its bottom. The upper end of this rod is slotted as indicated at I and engaged by a pin in the end of lever arm J pivoted on the standard C and having a lever extension J which, together with a lever arm J also pivoted on the standard C, are pivotally secured to the upright bar J extending from the top of a float J which is supported on the fluid met-a1 in the casting ladle.

' In operation theca'sting ladle C int-he position indicated in dotted lines is charged with molten metalatoa definite and desired height and the reservoir ladle in the posi tion shown in full lines is also charged with molten metal. The piston in the cylinder F is in the bottom of the cylinder and the mechanism controlled by the float J is in the position in which the valve Gr is closed. It being desired to begin the pouring of molten metal into the mold the operator by means of the operating lever DD and the toggle connected lever DD and link DD tilts the casting ladle'tothe position shown in full lines from. which a stream of definite v0lume will flow over its lip C. As the level of the metal in. thecasting ladle falls the .flOftiL J will move down with the result of approximately constant level of metal .is

maintained in the casting ladle and conse quently a constant flow oi. metalwill, issue from it.

At the end of the casting operation the ex? haust valve H is opened and the lever DD operated to return the casting ladle to nonpouring position.

Referring next to the modification shown in Fig. 2 indicates one of two standards supporting the casting and reservoir ladies, these standards being connected together by crossxframing indicated ate and ha ing, as shown, trunnion supports at a" and a 0 indicates the casting ladle supported,- as shown by trunnions a 0 and having a bot tom pour orifice c which is opened and closed by a stopper indicated at 70 andwhic'h is connected by a'cross-barl-i' withavertical slidcylc moving in guideways c c and actuatedto raise the stopper is or lower it to a definite degree by toggle levers Z and Z and an actuating rod pivoted to these toggle levers and connected at 7/. e indicates the reservoir ladle supported, as shown, by trun nions resting on the support a? and in this construction being of the bottom pour kind hai'i pouringorilice c at its bottom. a is a stopper, the raising or loweringoi which re ulates the flow .thi'ou h the bottom- .iour

orifice. This stopper, as shown, is connected bra cross harm, to the vertical slide a moving in gnidew'ays e c and actuatedthrough a rod'if connected with a piston not shown incylinderindicated at f. g isa pipeconnect-ion leadingfronra. sourceof fluid. under pressure and connecting througha valve in i .d-icated at g? with pipes g and g which in turn connect with. the top andbottom of the cylinder The valve 9 is actuated through a valve lever g? to which is connected adjustable rod 2' connected in turn withmechanism similar to that described in connection with Fig. land actuated by a float J.

In the construction of Fig. 2 the casting ladle c is filled to a definite height whicli'is that atwhich the flow will hold the valve in initial position. The stopper 7c is, of course, down as is also the stopper a of the reservoir ladle. hen it is desired to begin pouring the toggle levers Z, Z, are actuated. to lift the stopper to a'definite height and hold it in this position. iMolte'n metal willthen flow through the bottom pour orifice c and the float J will begin to move downward and coming through the mechanism described and the valve will. admit pressure fluid through the pipe 9 to the bottom or cylinder f with the result that-through the described mechanism the stopper a will be raised and metal will pass down. throughthe opening 722/ in the cover at of the castingladle. As the level of the metal in the casting ladle.

moves up 'and'downtlieposition of the valve.

g will be shifted with the result that the stopper a will move up and down regulating the flow of metal intothe castingladle in such a way that an approximatelyconstant level will be maintained therein.

Having now dos ,ribed my invention, what I claim as, new and desire to secure by. Lettors Patent, is: Q V

1. In combination with a casting ladle,

means for maintaining aconstant level of molten metal therein during iouring con- SlSl'lilQ" 01ft]. reservoir adapted to deliver molten metal to the ladle, afloat resting on themetal in the ladleand means controlled by the upand down motion ofathe float for regulating the pouringof metal from the reservoir so as to maintain an approximately constant level in the ladle. p

. 2. In combination with a casting ladle,

means for maintaining: a constant-level of l molten metal therein during pouring con-Q sisting of means for initiatinga flow of metal from the ladle, a reservoir adapted to deliver molten mctalqto'the ladle, afloat resting on the metal in the ladle andm'eans' controlled by the upfand down motion of the-float forregulating thepouring oif'metal from the reservoir so'as to maintain an approximately constant level inthe l adlei JAMES B. Lani).