US1179072A

US1179072A - Die-casting machine.

Info

Publication number: US1179072A
Application number: US86147314A
Authority: US
Inventors: Benjamin W Chandler
Original assignee: LAYTON M PARKHURST
Current assignee: LAYTON M PARKHURST
Priority date: 1914-09-12
Filing date: 1914-09-12
Publication date: 1916-04-11
Anticipated expiration: 1933-04-11

Description

B. w. CHANDLER.

DIE CASTING MACHINE.

APPLICATION FILED AUG. 10, I9Il- RENEWED SEPT. l2, 19M.

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B. W. CHANDLER.

DIE CASTING MACHINE.

APPLICATION FILED AUG. 10. 1911. RENEWED SEPT. 12. 19M. 1,179,072.

Patented Apr. 11, 1916.

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DIE CASTING MACHINE.

APPLICATION men AUG. 10. 1911; RENEWED SEPT. 12, 1914.

Patented Apr. 11, 1916.

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- B. W. CHANDLER.

DIE CASTING MACHINE;

APPLICATION FILED AUG. 10, 1911. RENEWED sin. 12. 1914.

Patented Apr. 11, 1916;

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UNITED STATES. PATENT QFFICE.

BENJAMIN W. CHANDLER, 0F INDIANAPOLIS, INDIANA, ASSIGNOR, BY MESNE ASSIGN- MENTS, 'IO LAY'ION M. PABKHURST, 0F CHAGBIN FALLS, OHIO.

DIE-CASTING MACHINE.

Specification of Letters Patent.

Application filed. August 10, 1911, Serial No. 643,270. Renewed September 12, 1914. Serial No. 861,473.

To all whom it may concern. 7

Be it known that I, BENJAMIN W. CHAN- DLER, a citizen of the United States, and a resident of Indianapolis, county of Marion, and Stateof Indiana, have invented a certain useful Die-Casting Machine, and I do be quickly and easily operated by men unskilled in the art and adapted to make successively castings from different metals which require different treatment in meltingthem; p

The feature of the invention lies in the quick introduction and the rapid expansion or explosion of a gaseous or explosive mixture for forcing the molten metal from the containing crucible into the die, whereby no part of the metal will be deteriorated byoxidization as now results in those die casting machines using compressed air to force the metal into the die. Along with the foregoing is the provision of means for mounting the crucible and insulating the same to prevent the radiation of heat with a result.-

ing cooling of the metal in the crucible. This construction makes use of a body oscillatably mounted in a supporting frame with means for clamping the die against the top of the body and in communication with the crucible held within said body.

The nature of the invention will be understood from the accompanying drawings and the following description and claims.

- In the drawings, Figure 1 is an end elevation of the machine with parts brokenaway and showing the means for-securing the die in the main frame. Fig. 2 is a vertical section on the line 22 of Fig. 1, showing the meansfor invertin' the container pot and the means for supp ying the explosive mixture to the crucible. Fig. 3 is a vertical section on the line 3'-3 of Fig. 2, but showing thepot 1n an lnverted position. Fig.4 is a horizontal transverse section on the hue 4-4 of Fig. 2, showing the means for supporting the crucible in the pot. Fig. 5 is a vertical section on the line 55 of Fig. 2. Fig. 6

Patented Apr. 11, 1916.

is a transverse section on the line 6-6 of:

Fig. 3, showing the as passage inthe sidev of the crucible. Fig. is an elevation similar to Fig. 1, with parts broken'away and with the movable parts turned through an angle of approximately 17 0 degrees, and showing the gas valve open. Figs: 8 and 9 show the gas valves in elevation and plan, respectively.

In detail there is shown in the drawings.

a pair of A-shaped supportingframes 10 spaced apart at the lower end by the rods 11 and, provided with bearings 12 at their upper ends for trunnions 13 which oscillat ably support a crucible container, pot 14. .1

or insulating chamber 16 from which the air is exhausted through the pipe 117 extending through the outer wall. The inner chamber wall 114 has a number of ribs 17, four being here shown, extendin inwardly therefrom, and tapering slightly om bottom to top and are provided for the purpose of holding a crucible or melting pot 18. A nipple 19 screwed into the walls 14 and '114 of the crucible holder has a two way valve 20 mounted on the end and a pipe 21 is con-I nected theretofor supplying a gaseous or other explosive mixture under pressure and introducing it into said chamber 15 when the valve 20 is opened. Pipe 21 has a check valve 121.

A cover 22 fits upon the fiat upper ring of-the crucible container 14-so as to make.

an air tight joint therewith and .is secured thereto by bolts 23 extending through

lugs

24 and 25 cast integralwith the cover 22 s and container 14, respectively, and has an inner or insulating chamber 26 from which the air is exhausted through the pipe 27.

There is a downwardly 'tapering conical opening 28 through the cover 22 not communicating with the insulating chamber 26 adapted to receive the conical shaped pouring'spout 29;, to be described later. Set

screws 30. extend through the inner andouter walls of said top 22'and have their ends flare button like for the purpose of holding the cover on the crucible.

The crucible 18 may be of any desired construction, whether of vitrified material or of metallic material shell-lined with fire clay, excepting that it ,is provided with a small gas opening 31 through the Wall above the level which the metal in the crucible will assume when melted and the crucible is up right. Said crucible fits vdown within the chamber and rests against and is secured by the inwardly extending ribs, before mentioned, and has-a cap 32 adapted to fit over its upper end which has an inwardly tapering conical hole :in the central portion thereof to correspond with the opening 28 in the chamber 22. Said cover 32, when placed upon. crucible, is held down by 'thescrews 30. 'The pouring ing conical in shape, may be driven into tight engagement with both the

covers

22 and 32. The outerend of the pouring spout fits into a shouldered-portion in the die 33,

said die being held thereon by means of a I screw 34, having a hand wheel 35, keyed thereon and with theupper portion of the screw extending through a frame 36 'mount ed on arms 37 which extend upwardly from the pot 14.

' frames 10'carries a projection 39 whichwill a .An' upward extension 38 from one of the engage an L-shaped handle 40 of the two way valve-20 when the pot 14 has been revolvedabout'170 degrees and cause the opening of said valve. The

air exhaust connections

117 and 27 are provided with pressure gages 41 and valves 42.

. The valve 20., before mentioned, has an L-shaped handle 40 with aspring which is preferably coiled about one leg with one e end inserted in' a hole the valve body and with the other bearing against the other.

leg and tendingto keepsaid valve in a closed position. The free end of said handle is preferably cut obliquely and has the outer part 52 connected to the main handle 40 by the spring hinge 53. e y

The oscillating movement 'of the .potmay be limited to 'an arc of 180 degrees by the pin 45 in the shaft 13 engaging a projection 46. from one of the'bearings 12, as shown in Figs. 2 and 5. V

In operation a portion of the air in the inj 'sulating chambersl6 and 26 is exhausted in any desired way. The crucible 18 containing.

- moltenmetal which has been melted elsespout 29, projects through" the opening in the crucible cover 22 and, be-

g mme where in any desired way, is placed in the container and the cover 32 placed on the crucible after which the cover 22 is placed upon the container 14 and secured thereon by means of the screws 23. The pouring spout 29 is then driven into place, the die adjusted on v the outer end of the spout and tightly secured thereon by turning the hand wheel 35 and causing the screw 34 to'wedge against then tilted toward the position shown in Fig. 7,. by turning the lever 43 on the shaft 13. After the pot has passed a horizontal position, the molten metal in the crucible 18 .the upper part of the die. The pot 14 is will flow through the spout 29 into the die engagement with said} lug the valve is quickly closed under the action of the spring 50 on the valve stem. This closing 1s accomplished, before the pot reaches the vertical position shown in Fig. 3. Thus a gaseous mixture under pressure will be suddenly introduced into the chamber 15 and,

passing through the hole 31 in the crucible 18, will meet with the molten metal contained therein, ignite and by the sudden in crease of pressure resulting therefrom within the crucible the metal will be forced into the die.

This sudden introduction of thecharge of gaseous mixture and the explosion 1 thereof at a desired time to drive out the metalclosely resembles the introduction and ignition of the-explosivecharge in the cylinder of an internal combustion engine where the piston is driven outwardly by the explosion. After the die has been poured the pot is turned back to its normal position, shown in Fig. 1, and in such, passage the lever extension 52 will again meet the lug 39, but the hinge 53 will allow it to pass by said lug'39 without actuating the valve tion. After the machine has been moved .and the "spring in said hinge will cause the extension 52 to return'to its normal posillfi to its normal position, the die may be re- Jmoved from'the machine by turning the hand wheel 35, thus releasing the die. It

will be readily understood that by this means of forcing the metalinto the-die none of the metal will-be oxidized as now results in those j die casting machines in which the metal is forced into the die by the use of compressed My invention is'not necessarily limited to the details of the construction which has been herein shown merely for the purpose of illustrating the general, nature of the in-.

vention. The main feature thereof being the discharge of the metal into the die by reason of the explosion or quick expansion of an explosive mixture in the crucible and also the employment of the he'atinsulating cham- 1 her within the potflor surrounding the cru c ible so that the crucible may be transferred .to. the pot after it has been heated andsthe metal therein melted in a. separate furnace and yet thecrucible be prevented from chill-- ing for a reasonable length of time during which by successive die casting operations,

I without removing a number of castings may be made from the same-charge of metal in the crucible and until all of the metal thereinhas been used,

the crucible for reheating the metal therein.

I claim as my invention 1. A die casting mach'ne including a cru- I cible adapted to be tilted for discharging. f

the metal into a die, and means for introducv ing a charge of explosive gas into the cru-' cible at thetime of such discharge.

3. A die casting machine including a (mu-- cible with an outlet 'at its upper end when I upright, a die in connection with said outlet, means for tilting the crucible so the metal will flow into'the die, and-means forintroducing a charge of explosive gas intothe crucible when it is tilted. p 4. A die casting machine including a crucible with an outlet at its upper end when upright, a die in connection with said out let, means for tilting the crucible so the metalwill flow into the die a passageway into said crucible from a supply of explosive gas under pres's ure,- a valve controlling said passageway, and means for opening said valve at the time of the discharge of the metal.

scribed, the combination of a crucible hav- 5. In apparatus of'the character deing an outlet, a die connected to the outlet, and means for introducing a charge of explosive gas into said crucible.

.6. In apparatus of the'character 'described, the combination of a crucibleh'av;

'ing an outlet, a die connected to the outlct,- I a p the crucible-is in normal pos1t1on,a die, a

-. and mechanism for controlling the flow-of ing an outlet, a diejcginnected'to thezoutlet means .ifor controlling-'the flow ofnietal metal through the outlet'into the die,'jthe'. said mechanism including-means for]intro' ducinga charge of explosive gas into said-,-

crucible. f a v t -7. In apparatus of the character scribed,'the combinaf'on -of a crucible-ha through the outlet into the die, and means for-introducing a charge of explosive gas into said crucible.

8.- In apparatus of the character dew scribed, the combination of a crucible having an outlet and mounted to move bodily to control the flow of metal therethrough, a die-connectedwith the outlet, means for moving said crucible whereby the metal therein flows into the die, and means forintroducing' a charge of explosive gas into the crucible during movement thereof.

9. In apparatus of the character de-' scribed, the combination with a support, of a casting apparatus comprising a crucible adapted to holdmetal in a fluid state, a die,

a conduit leading from said crucible to said die, and means for introducing a charge of explo's'ivegas into said crucible? means for rotatably supporting said casting apparatus onsaid support, and means carried by said support for controlling the supply of exing apparatus. V

10. The combinatio of a crucible for plosive gas during movement of said cast- I porting said crucible and-provided with a recess into which the opening in the; crucible leads, a die, a conduitlea'ding from the cru cible to said die, and means for introducing a charge of explosive gas into the recess in sald casing.

- .1-1.- In apparatus of the character described, the combination of a casing, a cru- .cible mounted therein and adapted to hold the metal in a fluid .state, devices interposed between the crucible and the casingv for spacing the crucible therefrom to vform a chain: ber,-thesaid crucible being formed with an opening above the level of the metal therein,

a die, a conduit between the crucible and the die, andmeans for introducing a charge of explosive gas into the chamber between the crucible and said casing.

12. In apparatus of the character dei scribed, the combination of a casing -mounted to move bodily, a crucible mounted therein and adapted to hold metal in a fluid state,

devices. interposed between :the crucible and the casing for spacing the crucible therefrom to form a chamber, thesaid crucible being formed, with an openingjin its side wall above thelevel of'the metal therein, when 1311i; f appara'us of. the I icribfd,the-{combination wltha die, of a 1 character decasing open at its upper end, a top ,fdr said In Witness whereof I have hereunto efcasing, a crucible mounted in said casing, a fixed my signature in-the presence of the 13 cover for safid crilcible, means carried by the Witnesses herein named.

casin top or c ampin sai cover in positi0n, a conduit betweeii said crucible and BENJAMIN CHANDLER said die, means for moving said casing, and Witnesses:

means for introducing a charge of explo- G. H. BOINK,-

sive gas into said crucible. E. H. MAYO.