US1300739A - Casting apparatus. - Google Patents

Description

J. KRA'LUND, cJoucxwomn & M. STERN.

CASTING APPARATUS. APPLICATION FILED NOV. n. ma.

Patented Apr. 15, 1919,

3 SHEETS-SHEET l- J. KRALUND, C. DUCKWORTH & M. STERN.

CASTING APPARATUS. APPLICATION FILED Nov. :1. 191a.

Patented Apr. 15, 1919.

3 SHEETS-SHEET 2- .lullllllllllllll llll'ltl" l. KRALUND, C. DUCKWORTH & M. STERN.

CASTING APPARATUS. APPLICATION FILED NOV. 11 1918.

1,300,739., Patented Apr. 15, 1919.

3 SHEETS-SHEET 3- "run snares. earner ornron.

JOHN KRALUND AND CLARENCE nooxwoa'rn, or BROOKLYN, NEW YORK, AND Memos screen,

0F TOLEDO,'OHIO, ASSIGNORS T0 DOEHLER DIE CASTING COMPANY, OF

BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

CASTING APPARATUS.

Application filed November 11, 1918. Serial No. 261,972.

all citizens of the United States, the first two above named residing in the borough of Brooklyn, county of Kings and State of New York, and the third above named residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new anduseful Improvements in Casting Aparatus, of which the following is a specication. Our invention relates to paratus and particularly to mechanism whereby the die'- may be expeditiously and with a minimum of labor opened and closed and locked in closed position during the operatlon of making die-castings therein. In the preferred form of our device a horizontally movable ram or member to which aportion of the die is secured 1S der with piston rod and cross head, the

movement of the cross head serving to open is moved forwardly and back and is locked 1n 1ts forward position in which the die is justments are closed, when the toggle joint is straightened. With such an arrangement ossible to cause the closing movement of the die to take place at each operation in the same manner and with the same necessary amount of pressure and with a minimum expenditure of time and labor. Such apparatus is adapted to be used in connection with suitable devices for forcing molten metal under pressure into the die, such, for example, as the apparatus described in application of John Kralund, 17, 1918. The

-- proved apparatus of the'character above briefly described.'

' In-order that our invention may be more clearly understood, attention is hereby directed to the accompanying drawings, forming a part of this application and illustrating one embodiment of our, invention; In

the drawings Figure 1 represents a vertical longitudinal section through an apparatus embodying our invention, certain parts die-casting aprecipro-- cated by power means such as anair cyhn- I exact adbeing shown in side elevation, Fig; 2 is a top plan viewof the same, Fig. 3 1s a cross section taken on line 33 of F ig. 1, and Fig. 4 is a side elevation of the melting pot and molten metal carrier device shown in Fig. 1, certain parts being shown in section.

Referring to the drawings, the mechanism comprising our invention comprises a suitable frame 1 which may be of any suitable form such as thatillustrated. This frame or standard 1 is provided on its uper surface with a pair of bearing suraces, such 1 as the fiat surface 2 and the inverted V-shaped surface 3 shown in Fig. 3 on which the frame 4 is mounted for longitudinal adjustment. Frame4 carries a horizontally disposed power cylinder 5, which is mounted intermediate the side walls of the frame 4 in any suitable manner as on the. flanges 6, 6 which are inwardly disposed from the side walls of theyframe 4. A top member 7 may be slidably mounted onsuitable slideways on frame 4 for a purpose to be explained, and may be provided with a pair of small cover members. 8 and 9, adapted to be seated over suitable- Specification of ietters Patent. Patented A 15, 1919 suitable melting pot and furnace construction, the melting pot having meansfor forcing the molten metal into the gate or opening provided in member 10. One portion, a

11, of a die is secured to the member 10 by suitablemean's such as the bolts and nuts indicated at 12, 12, this die member having a gate or opening therein registering with the opening in the member 10.

'The' cylinder 5 is provided with a suitable pistonor plunger 13 having apiston rod 14 extending forwardly therefrom through a suitable gland, this piston rod being secured to a block or cross head 15 adapted 'to reciprocate on a slideway 16, which is carried by the .frame 4. The plunger 13 is reciprocated when desired by air or other suitable motive fluidwhich may be admitted to the cylinder on opposite sides of the plunger by means of pi e connections 17 and 18 provided with suitable valves (not shown).

The member 19 of the die, which is adapted to be moved into and out of engagement with the member 11 of the die when the die is to be opened or closed, is suitably secured as by bolts and nuts20, 20, to the face of a ram or horizontally movable member 21, which is preferably co-axial with piston rod 14 and the cylinder 5, and which is integral with or secured to the slidably mounted top member 7. Operatlve connection between the cross head 15 and the ram 21 is established by means of a pair of linkages which are adapted to act as toggles to lock the die in its closed position. As

illustrated, links 22, 22, are pivoted at their forward ends at 23, 23, to the ram21 on opposite sides of the latter. Other links 24, 24, are pivoted at their rear ends 25, 25, to horizontal flanges 26, 26, extending inwardly from the sides of frame member 4, the pivots 25 being in longitudinal alinement with the pivots 23. The rear ends of links 22 are pivotally connected to the for ward ends-of links 24 by means of pins 27, 27, and links 28, 28, have their outer or forward ends pivotally mounted on the same pins 27, 27. The inner ends of links 28 are pivotally secured at 29, 29, to the cross head or block '15. The manner in which thevafaces of links 24.

. cylinder rious' links referred to are formed is not material, but links 24 may suitably be formed with forked ends throughwhich pins 27 extend, links .22 being pivoted on pins 27 between the forked ends oflinks 24, and links 28 maybe formed'with forked ends which are pivotally mounted on pins 27 above and below the top and bottom sur- With the construction described the forward. movement of plunger 13 and cross head-15 into the position shown in the drawings serves to straighten out the toggles formed -by link'sj22 and 24, to press the member 21 forwardlyinto the position in- Which the die is closed and is locked inthe closed position by the alinement of links 22 and 24. When the die is opened by causing the plunger 13 to move rearwardly in drawn 'rearwardly, while links 24 swing in: wardly about the fixed centers 25, 25, links 22 correspondingly swinging inwardly about 1 their pivots 23 to break the toggles and to open the die by pulling member-21 rearwardly through the link connections 28, 22. The longitudinal position of frame 4 on standard 1 may be adjusted in accordance with the dimensions of the die members which are to be used for any particular series of casting operations, so that the'forward movement of member 21 will be just sufiicient to close the die with the proper amount of pressure. This may be accomplished by providing the frame 4 with outwardly extending flanges 30, 30, through 5 the inner ends of links 28- are.-

openings in which extend the-threaded tie rods 31, 31, the forward ends of which exadjusted in correct position on the standard -1 and secured in such position by means of the nuts '33 on rods 31.

Suitable adjustable vided to limit themo'vements of the toggle joints into their straightened positions and to thereby slightly adjust the throw of member 21. These 'stop members may suitably take the form of a bolt 34 threaded into a suitable opening in the ram 21 and extending rearwardly therefrom, and a bolt or member 35 extending forwardly from the cross head 15, bolt 34 being provided with ahead and lock nut, and pairof nuts, for securing the bolts in adjusted position. Member 35 is shown as an extension of piston rod 14, and is provided with a forwardly extending portion 35 adapted to abut against the head of bolt 34 at the end of the forward movement of cross head 15. These stop members may be so adjusted that the cross head 15 is stopped Whenlinks 22 and 24 are exactly in alinement With in which case links 28 will extend inwardly at right angles to links 22 and-24, as shown.

sure through the gate. in member 10 into the die, this being a form-of device covered by the said application of John Kralund,

Serial No. 245,263, although it is obvious that our present invention is not limited in any way to the use of such a device. In the device illustrated a pivoted carrier or ladle 38 is provided Wiatha nozzle 39 which "31s adapted to dip under the surface of the molten metal in the melting pot when the ladle device is in oneposition, so that a charge of the moltenmetal will flow into the interior of the ladle. Then this charge is to be transferred to the die theladle devicev 38 is swung into the position shown in' Fig. 4-by mechanism which it is not necessary to describe in detail, so that the nozzle 39 will register with the gate opening in member 10, after which the charge is forced into the dieby means of air which iscaused to flow under pressure through the flexible forward movement of stops may also be promember 35 with a each other,

of a reciprocable actuating member, a mem connection 40 into the interior of the ladle device 38.

It is obvious that the mechanism we have I described results in the effective and rapid opening andclosing and locking of the die by the simple operation of the valves ad mitting air or other motive fluid to the op posite sides of plunger 13 in the cylinder 5. With this device the forward movement of ram 21 and the amount of pressure exerted on the die in closing the same is limited and determined by the position of the links 22 and 24: in their straightened or forward positions. The provision of "the stop members on orosshead 15 and ram 21 also results in taking to a considerable extent the stresseswhich otherwise would be carried by the pivot pins 25 and 23. While the form of device illustrated and described is thought to be most effective, it shouldbe understood, however, that our invention is not strictly limited to the exact details of construction described and that our invention is not'necessarily limited to the use of a power' cylinder such as that illustrated since other forms of mechanism may be used for causing the reciprocation of a member such as the cross head 15 or-for otherwise operating the toggle construction.-

' What we claim is; v 1. In a casting machme, the combination ber to which a portion of a die may be secured, movable into positions to close and open the die, a frame, andtoggle connections between said frame and members adapted to move said second member and to straighten the toggle, to form a lock, when said member has been movedto close the die.

2. In a casting machine, the combination of a power cylinder, a piston, piston rod and cross head therefor, a member to which a portion of a die may be secured, movable into positions to close and open the .die, a frame, and toggle connections between said frame, cross head, and member, adapted to move said member and to' straighten the toggle, to form a look, when said member has been moved to close .the

die.

3. In -acasting machine, the combination of a fixed frame, having a slideway, a block mounted to reciprocate thereon, a member to which a portion of a die may be secured, movable in the same directions as said block, to close and open the die, a link pivoted to said member, a link pivoted to said frame at one end and pivoted at its opposite end' to the free end of said first link, said links being adapted to extend in an approximately straight line when the die is closed, and a link pivotally connecting the pivotalconnection between said first two links and said 'block,'and adapted to close or open the.

. tions to close and open the die, and contoggle formed by said first two links, as

' 4. In a casting machine, the combination of a fixed frame, ajpower cylinder carried thereby, a piston, piston rod and cross head for said'cylinder, a member to which a portion of a die may be secured, movable in the axial direction of said cylinder into posinections for moving said member and locking the same in the forward position in which the die is closed, comprising links pivoted to said member and extending rearwardly therefrom, links pivoted tosaid frame and extending forwardly therefrom, pinspivotally connecting the adjacent ends of said rearwardly and forwardly extending links, said links being adapted to extend in straight lines when said member is in its forward position, and links pivotally connected to said pins and extending inwardly therefrom to pivotal connections with said cross head.

5. In a casting machine, the combination of a fixed frame, a member mounted to4re-.

vciprocate, a member to which a portion of a die may be secured, movable in the same directions assaid first member, to close and open the die, a link pivoted at one end to said second member, a link pivoted at one end to said frame and at its opposite of said first member, and a link pivotally connecting the pivotal connection between said first two links and said first member, and adapted to close or open the toggle formed by said' first two links, and to move said second member forward or back, as said first member moves forward or back.

6. In a casting machine, the combination of a frame, a member mounted to reciprocate thereover, a member to which a portion of a die may be secured, links pivotally secured to said second member and frame, and to each other, to form a toggle, adapted to straighten when said second member is in forward position, a link pivotally connected to said first member and to the pivotal connection between said first two links, to opmember, to which a portion of a die may be secured, links pivoted to said frame, second member and first member, and to each other, to form a toggle, operable from said first member and adapted to straighten when said members are in forward position, and adjustable stop means carried by, said first and second members, adapted to engage vat the end of the forward movements of said members to adjust the forward position of the toggle,

S. In a casting-machine, the combination.

of a frame, a member mounted to reciprocate thereover, a member in advance of said first member, to which a portio'n of a die may be secured, toggle connections between said frame and members adapted to move said asoopea said frame with respect to said last member;

This specification signed and witnessed this 25th day of October, 1918.

. JOHN KRALUND; Witness:

JOSEPH Home. This specification signed and witnessed this 28th day of October, 1918 CLARENCE DUCKWORTH. Witnesses JosEPH Home, CHAS. PACK. This'specification signed and witnessed this 30th day of October, 1918.

I MARCUS STERN. Witnesses:

JoHN'A. TALLMAN, CLARENCE E. PRANGE.

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