US1885421A

US1885421A - Die-casting machine

Info

Publication number: US1885421A
Application number: US394675A
Authority: US
Inventors: William J During; Lester Nathan
Original assignee: PREC CASTINGS Co Inc
Current assignee: PREC CASTINGS Co Inc; PRECISION CASTINGS COMPANY Inc
Priority date: 1929-09-23
Filing date: 1929-09-23
Publication date: 1932-11-01
Anticipated expiration: 1949-11-01

Description

NOV l, 1932- w. J. DURING ET Al. 1,885,421

DIE CASTING MACHINE N YE' irme-5.5 I y M i@ ,mf/ 2 f rra fil/vers Nov. l, 1932.

W. J. DURING ET AL DIE CASTING MACHINE Filed Sept. 23, 1929 2 Sheets-Shee E .n M r .r

figa@ Patented Nov. 1, 1932 UNITED STATES PATENT ori-Ice` WILLIAM J. DURING, 0F SYRACUSE, NEW YORK, AND NATHAAN LESTER, OF CLEVLAND, OHIO, ASSIGNORS TO PRECISION CASTINGS COMPANY, INC., OF SYRACUSE, -NEW YORK,

A CORPORATION OF NEW YORK DIE-CASTING MACHINE Application iled September 23, 1929. Serial No. 394,675.

This invention relates to certain new and usefulimprovements 1n die casting machines and more particularly to the constructlon and Voperation of the ladle or delivery pot used in conveying the molten metal from a suitable melting pot to the inlet port of a. die or mold and to the manner in which the metal is then ejected by compressed fluid, as air, into said die or mold.

The main objects of this invention is to provide a die casting machine which oo mbines reliability and safety of operation with durability and simplicity of construction;

To this end, the ladle or delivery `pot is pivotally mounted on a crosshead which is slidably mountedupon suitable guide rods positioned one at either side of the delivery pot and carried by the frame of the machine. The delivery pot is positively moved to and from the casting relation with the die by the reciprocative movement of the crosshead, which, in turn, is actuated by a rock arm which is connected by a link to the rear portion of the delivery pot, and at lthe same time, the ladle or delivery pot is rocked about its pivotal connection with the crosshead by an adjustable arm which is pivotally connected with said delivery'pot and a stationary portion of the machine, asfor instance, the stationary die supporting plate.

Thecompressed fluid for eje'cting the molten metal can be admitted to the ressure chamber of the delivery pot only W en said pot is in the casting position due to the fact that the iiuid inlet duct provided for the pressure chamber in the delivery pot is only l connected with the fluid inlet passage provided in the stationary die plate when the ladle or delivery pot is in casting relation wlth the die or mold.y iIn other words, the pres?y sure chamber in the delivery pot is discon- P nected from the compressed iiuid conduit at all times except when the delivery pot is in casting position, therefore insuring a maximum 'degree of safety in the operation of the fluid.

Other objects and advantages relate to the detail of the structure and relation of the parts all as will more fully appear from the following description taken in connection with the accompanying drawings, in which I Figure 1 is a top plan of a portion of a die casting machinecomprising the different elements of this invention.

Figure 2 is a side elevation of the device as illustrated in Figure 1.

Figure 3 is a longitudinal vertical sectional view taken on line 3-3, Figure 1.

Figure 4 is a detailed transverse sectional view of the crosshead taken inthe plane of the line 5 4, Figure 2. l 1 t As illustrated in the drawin s, the device consists of a suitable frame or re box 1- having a furnace chamber -2 therein and a suitable cover plate -3- secured to the upper end of the frame --1-. A suitable melting pot -4- for containing molten metal is supported by the cover plate 3 in said furnace chamber -2. A. suitable stationary die supporting plate -5- is secured in anycsuitable manner to the frame of the machine in co-operative rela-tion with the furnace and melting pot and has secured therein a receiving nozzle -6-. adapted to register with the inlet port of the sprue die section of a die or mold not shown which is carried by the plate -5. y The ladle or delivery pot -7- as shown in the drawings, is of the goose-neck type and consists of a major vertically disposed portion -8- having a longitudinally disposed pressure chainber -9 therein and provided with a spout -10- which extends upwardly and for wardly from the lower portion of the delivery pot and is provided with a delivery nozzle 11 secured to the outer end thereof adapted when the delivery pot is in the casting position to register with the receiving nozzle 6vsecured in the stationary late -5--. y t

The delivery nozzle -11- is connected with the pressure chamber -9 by a duct l2- provided in the spout -l0- so that when the delivery pot is in the charging position with the nozzle 1lsubmerged in the molten metal contained in the melting pot #4- as illustrated by dotted lines in Figure 3, the metal may gravitate through the nozzle -11-4 and duct -12- to IOL the pressure chamber -9 and when the delivery pot 7 is in the casting position, the metal may be forced from said chamber through the delivery nozzle -11- into the die or mold. A'supporting bracket -13`- for the delivery pot is secured by bolts or screws l1/1 -to the upper end of the major portion -8- of said pot and has an arm v--15- extending rearwardly therefrom l i zontally disposed shaft 16- therethrough.

-ment t which is provided with an aperture in the outer end thereofadapted to receive a hori- The shaft 1G- extends transversely of the machine in aplane above the melting pot 4 and is rotatably mounted at its ends in suitable brackets or blocks -17--which are, in turn', Vslidably `mounted for "longitudinal movement upon parallel horizontally dis- .posed guide rods -18-.

The shaft -16- and block -17- combined to form a crosshead 28- for pivotally supporting the delivery pot -7- to swing about the axis of the shaft -16`- and for longitudinal reciprocative movement in a rectilinear manner' upon the guide rods -18. The guide rods -lS-are provided at one end with a reduced threadedporti'on -19- which is screw threaded into .respective brackets -20-, said brackets being adjustably secured to thel'top surface of the cover plate 3- by screws or bolts 2l- 'which pass through respective elongated holes '-22- provided in the brackets 20- and screwlthreaded in the cover'plate 8. The other ends -19- of the rods 18 are reduced in diameter and passed through suitable holes provided in upwardly extendingtherethrough so' that when-the rods are secured in 'the respective lugs -23- and `-'24-, the cover plate --3A and the stationary die supporting plate -5- will thereby be secured together. Each of the rods 418- are adjustably secured in the renuts -25- and -26- screw threaded on the forward reduced end of the rod and positioned olie on either side of the lugs.

In the upper portion of the brackets 20- is journal'ed a suitable rock shaft -27- disposed in' horizontal plane above and transverse of the Vframe -flso that any adjustment of the rods -18-' and brackets -20 longitudinally o f the frame, will be transmitted through the rock shaft -27- to 'the crosshead -28- and delivery pot 7 carried thereby to bring the delivery nozzle l1- of said pot into proper casting relation with the receiving nozzle -6-, the rock shaft -27- bein operably connected with the delivery p'ot by means of a rock arm 30- secured to said shaft to rock therewith and positionedv intermediate the brackets -20-. The' outer end of the rock arm 30 is slotted to receive one end of a link bar -31- which is pivotally connected therewith b a pin -32- while the other end of the lin i 31- is positioned in a suitable slot provided in a rearwardly extending lug -33- of the bracket -l3- and pivotally connected therewith by a pin -34- arranged in a horizontal plane at the rear of the crosshead shaft -16- so that when the delivery pot is in the casting position as illustrated by full lines in Figure 3, the axes ofthe crosshead shaft 1G- and the rock shaft -27- and the two pivotal pins -32- and 34- will be i'n the same straight line in a plane above the delivery nozzle 1l-'- and intermediate said metal delivery nozzle and the fluid inlet nozzle for ejecting the metal from the chamber -9- which will be more fully hereinafter explained. 4In other words, the supporting shaft -16-, rock arm-30- and the connecting link -31- will be on the dead center when the delivery pot is in the casting position and will be prevented from passing 4downwardly beyond the dead center by an upwardly extending lug or stop -35- formed on the upper side of the cover plate -3- with the upper end thereof in contact with the undersurface of the rock arm -30- when said arm is in itslowered position.

rlhe delivery pot support bracket .-13- is also provided with an upwardly and forwardly extending arm '36- which is pro vided with a Huid-receiving nozzle -37- in the outer end thereof adapted when thedelivery pot -7f is in the casting position to register with a fluid delivery nozzle -38- which is secured to the rear face of the upper portion vof the stationary die supporting plate The fluid-receiving nozzle -37- is .connected with the pressure chamber -9- of the delivery'pot -7- by a suitable duct to one of the vertical sides of the plate 5 where it is connected to any suitable source of fluid supply as a pressure pot not shown, by"

a pipe or conduit v-41- which is screw threaded in the adjacent portion of the die plate 5- in registration with the duct rllhe delivery pot -7 is guided to swing verticallyabout the aXis of the crosshead shaft -16- Iduring the reciprocating movement of said crosshead to bring thelnozzle -ll' from the charging position submerged in the metal contained in the melting pot e4-'into co-operative alignment with the receiving nozzle --6- by means of an adjustable supporting link 43- which has one end thereof pivotally mounted on a pin 4A- which passes through one end of the link -43- and is secured in suitable upwardly a extending spaced arms provided on the upper horizontal edge of the die supporting plate -5-.. The other end of the link -43-- is pivotally mounted on a pin -46 which, in turn, is secured in the upper end of a bi-v furcated rod 471- which, in turn, is screw threaded in the upper portion of the bracket .-13 in vertical alignment with the pressure chamber --9-- of the delivery pot 7-.

The link -43- in this instance, is composed of a pair of brackets #48- and -49- which are pivotally mounted on the pins 442- and -46 respectively and provided in their adjacent outer ends with suitable internal threads for receiving the opposite end of a connecting rod which is provided at its outer 4endiwith reverse'threads so that by the proper manipulation ofthe connectsupporting bracket l3- may be vadjusted to bring the delivery nozzle -11- and fluidvrupon the stop cured in the adjusted position by suitable lock nuts 5l-screw threaded thereon.

The bracket 13 in this instance, is ad- -justably secured to the horizontal, shaft locked in the operative position by a lock nut `--53-. The shaft Q27- may be rotated by any suitable meansas by a force applied-.by hand or otherwise to the lower end of the arm -54 which is secured .to the outer end of the shaft -27-.

The operation of thel machine is as follows :-The ladle or delivery pot 7--V is' normally in the chargingposition with the nozzle -llsubmerged in the molten metal contained in the melting pot -4- as illus'- trated bydotted lines in Figure 3 and with the crosshead -28 in the .eXtreme rear portionfat which time the fluid-receivingV nozzle .-37- is disconnected from the-fiuid deli'vf ery nozzle -38.-. Now when'it is desired to do so, the delivery pot -7- may be raised to the discharging or casting position by rotating the shaft -27-- to bring the rock arm 30;- forward to the 'down position at rest This will cause the delivery pot to be carried forwardly by the crosshead -28-- as said crosshead moves along the guide rods -18-. This forward movement of the delivery pot will also cause the link -43- to rock said delivery pot about the axis of the crosshead shaft 1G-- due to the lever action of said link upon the upper portion of the bracket -l3- as the link -43 rocks about the axis of the pin -44-- This rockingmovement of the pot 7 is for the purpose of bringing the metal delivery nozzle -lland lthe Huid-receiving nozzle 37M into the horizontal plane of the metal-receiving nozzle -6- and the fluid delivery nozzle -38- respectively at substantially the same time said delivery pot actuating toggle joint reaches the dead center positiong That is, the link -43- acts to bring the nozzles -11- and -37- carried by the delivery pot -7- into co-operative alignmentwith the respective nozzles -6- and --38- secured to the stationary die-supporting plate -5- as the pot -7- and bracket -13- are moved forwardly through the straightening out of. the construction formedby the rock arm 30- and link -31- which forces the nozzles l1- and -37- directly into the seat of the rey spective nozzles 6* and -38- supported by the plate -5-. It Will benoted that the pressure with which the nozzles -11- and --"7- are forced against the respective noz-1 zles 6 .and -38, is regulated by adjusting the guide rods -'l8-- in theV respective lugs -23- and, 2eand that said nozzles may be brought into horizontal alignment with the respective co-operating nozzles carried by the plate -5 by adjusting thel bracket -'l3- on the shaft --16-A.

' After the delivery pot`7- has reached the casting position, the fluid, as air, under pressure, may be admitted by manipulating a. Vsuitable .controlled valve into the duct 40eand through the nozzles -38 and and duct -39- to the chamber -,9` for" ejecting the molten metal therefrom through the nozzles -lland 6- intop .the die or mold after which the fluid mayV beA again shut oli1 from the duct -40- by reversing the movement of the controlled valve and then the pot -7- returned to the `normal charging position within the melting pot 4 by reversing the movement of the lever 54- to rock the shaft -27- thereby returning the rock arm SO- to normal up position.

l. In a die-casting machine in combinawith the'delivery pot for producing a rocking movement of said pot during the rectilinear movement of the pivotal support.

2. In a die-casting machine in combination with a melting pot for containing molten metal and a die-supporting plate having a receiving nozzle therein, of a pressure chamber having a delivery nozzle connected therewith normallyjsubmerged in the molten metal, a reciprocating supporting means for lthe chamber mounted for rectilinear move' ment toward and from Isaid die-supporting plate, actuating. means pivotally connected with the supporting means for moving said supporting means and chamber, and additional supporting means for moving the. nozzle from the submerged position into operative alignment with the receiving nozzle and return during the movement of the firstmentioned supporting means.

3. In a die-casting machine in combination with a melting Apot for containing molten metal and a die-supporting plate having a receiving nozzleftherein, of a pressure chamber having a delivery nozzle connected therewith normally submerged in the molten metal, a reciprocating supporting-means f or the chamber mounted for rectilinear movement towards and from said die-supporting plate, actuating means pivotally connected with the supporting means for moving said supporting means and chamber, additional supporting means pivotally connected with the pressure chamber and with the die-sup- 40 porting means for moving the nozzle from the submerged position into operative alignment with the receiving nozzle and return during the movement of the first-mentioned supporting means.

4. In a die casting machine in combination' with a melting pot for containing molten metal and a die supporting plate having. a

receiving nozzle therein, of a delivery p ot vso having 'a pressure -chamber therein provided with. a delivery nozzle normally submerged in the moltenmetal, a reciprocating supporting means pivotally secured to the rear portion of said delivery pot to move said pot to and from the die plate and additiorial. lsupporting means mounted to rock aboutfa fixed axis and pivotally secured to the upper portion of said delivery pot to cau-se the delivery -noz'zle to swing from the submerged position into operative alignment with the recelvmg nozzle and return during the reciprocating movement of the first-mentioned supporting means.

5. In a die castmg machine in combinationwith a melting -pot for 4 containing molten metal and a die supporting plate having a receiving nozzle therein of a delivery pot having a pressure chamber therein provided with a metal delivery nozzle and a fluid receiving nozzle connected therewith, said delivery nozzle being normally submergedI in the moltenmetal, a .reciprocating supporting means pivotally secured to the rear portion of the delivery pot to move said delivery pot to and from casting relation with the diesupporting plate, additional supporting means mounted to rock about a fixed axis and pivotally secured to the upper portion of said delivery pot to cause the delivery nozzle to swing from the submerged position into operative alignment with the receiving nozzle and return during the reciprocating movement of the first-mentioned supporting means andmeans comprising a fluid conduit adapted to register with the fluid-receiving nozzle when the delivery pot is in the casting position for ejecting the molten metal from the pressure chamber through the delivery nozzle.

6. In a die casting machine in combination with a melting pot for containing molten metal and a die supporting plate having a receiving nozzletherein of a delivery pot having apressure chamber therein provided with ametal delivery nozzle and a fluid receiving nozzle connected therewith, said delivery nozzle,bcing normally submerged in the molten metal, a reciprocating supporting means adapted to move in a rectilinear manner pivotally secured to the rear portion of the delivery pot, additional supporting means mounted to rock about a fixed axis and pivotally secured to the upper portion of said delivery pot to cause the delivery nozzle to swing from the submerged position into operative alignment with the receiving nozzle and 'return during the reciprocating movement of the first-mentioned supporting means and operating means for the delivery pot positioned ICO zle being normally subiierged in themolten metal, a reciprocating supporting f means adaptedl to move in a rectilinear manner-pivotally secured to the rear portion of the delivery pot, additional supporting means mounted to rock about a fixed axis 'and piv. otallyV secured to the upper portion of said delivery pot to cause the delivery'nozzle to swing from the submerged position into operative alignment withl the receiving nozzle and return during the reciprocating movement of the iirst-mentioned'supporting means and operating means for the delivery pot positioned in a plane intermediate said nozzles comprising a rock lshaft connected by a toggle to the rear portion of the delivery pot for moving said delivery pot and delivery nozzle into casting relation With the receiving nozzle and means for adjusting the rock shaft relatively to the die supporting plate to determine the pressure at Which the delivery nozzle engages the receiving nozzle.

8. In a die casting machine in combination With a melting pot for containing molten metal and a die supporting plate having a receiving nozzle therein of a delivery pot having a pressure chamber the-rein provided with f a metal delivery nozzle and a fluid receiving nozzle connected therewith, said delivery nozzle being normally submerged in the moiten metal, a reciprocating supporting means adapted to move in a rectilinear manner pivotally secured to the rear portion of the delivery pot, additional supporting 'means mounted to rock about a fixed axis and pivotally secured to the upper portion of said delivery pot to cause the delivery nozzle to swing from the submerged position into operative alignment with the receiving nozzle and return during the reciprocating movement of the first-mentioned supporting means and operating means for the delivery pot positioned P in a plane intermediate said nozzles comprising a rock shaft connected by a toggle to the rear portion of the delivery pot `for moving said delivery pot and delivery nozzle into casting relation with the receiving. nozzle, and iiuid supply means comprising a fluid conduit adapted to register With the fluid-receiving nozzle when the delivery pot is in the casting position for ejecting the molten metal from the pressure chamber through the delivery nozzle. y

9. In a die casting machine in combination With a melting pot adapted to contain molten metal of a stationary die supporting plate having a metal receiving nozzle and a fluid conduit therein, of a delivery pot having a pressure chamber therein provided with a metal delivery nozzle and a Huid-receiving nozzle, said delivery nozzle normally submerged in the molten metal, a reciprocating supporting means adapted to move in a rectilinear manner pivotally se ured to the rear portion of the delivery potadditional supporting means mounted to r ck about a fixed axis pivotally secured to the upper' portion of the delivery pot to cause said potto swing about the pivotal connection With the firstmentioned supporting means to bring the delivery nozzle from the submerged position into operative alignment With the metal receiving nozzle and the iiuid-receiving nozzle into operative alignment with the fluid conduit and return during the reciprocating movement of the first-mentioned supporting means.

10. In a die casting machine in combination with a melting pot adapted to contain molten metal of a stationary die-supporting plate having a metal-receiving nozzle and a fluid conduit therein, of a delivery pot having a pressure chamber therein provided with a metal delivery nozzle and a fluid receiving nozzle, said delivery nozzle normally submerged in the molten nieta-l, a reciprocating supporting means adapted to move in a rectilinear manner pivotally secured to the rear portion of the delivery pot, additional supporting means mounted to rock about a fixed axis pivotally secured to the upper portion of the delivery pot to cause said pot to swing about the pivotal connection with the firstmentioned supporting means to bring the delivery nozzle from the submerged position into operative alignment with the metal receiving nozzle and the Huid-receiving nozzle pinto operative alignment with the fluid conduit and return during the reciprocating movement of the first-mentioned supporting means, and operating means for the delivery pot positioned in a plane intermediate said nozzles comprising a rock shaft connected by a toggle joint to the rear portion of the delivery pot for moving said delivery pot into late.

11. In a diecasting machine in combination with a melting pot adapted to contain molten metal of a stationary die-supporting plate having a metal-receiving nozzle and a uid conduit therein, of a delivery pot having a pressure chamber therein provided With a metal delivery nozzle and a fluid receiving nozzle, said delivery nozzle normally submerged in the molten metal, a reciprocating supporting means adapted to move in a rectilinear `manner pivotally secured to the rear portion of the delivery pot additional supporting means mounted to rock about a Xed `casting relation With the die-supporting axis pivotally secured tothe upper portion of the delivery pot to cause said pot to swing about the pivotal connection with the first- Y mentioned supporting means to bring the delivery nozzle from the submerged position into operative alignment with the metal-receiving nozzle and the fluid receiving nozzle into operative alignment with the fluid conduit and return during the reciprocating movement of the first-mentioned supporting means, operating means for the delivery pot positioned in a plane intermediate said nozzles comprising a rock shaft connected by a toggle joint to the rear portion of the deliv ery pot for moving said deliverypot into casting relation with the die supporting plate, and means for adjusting the rock shaft relatively to the die-supporting plate to deter- -mine the pressure at which the metal-receivby the metal delivery nozzle and fluid receiving nozzle' respectively.

. 12. In a die-casting machine in combination, a delivery pot, a pivotal support for said pot mounted for rectilinear movement to- Ward and from a casting position, actuating means pivotally connected with said support, and additional means pivotally connected Y with the delivery pot adapted to produce, a

rocking'movement of the pot during the re'c`- tilinear movement of said pivotal support.

In witness lwhereof we have hereunto set our hands this 16th day of September, 1929. WILLIAM J. DURING. NATHAN LESTER.