US1087795A - Press. - Google Patents

Description

J. F. LEWIS.

PRESS.

1 APPLICATION FILED OUT. 9, 1911. 1 087,7951. Patented Feb. 17, 1914.

2 SHEETS-SHEET 1.

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J. F. LEWIS.

PRESS.

APPLICATION FILED OUT. 9, 1911.

1,087,795, Patented Feb. 17, 1914.

2 SHEETS-SHEET 2.

awe/whom JOHN F. LEWIS, OF PHILADELPHIA, PENNSYLVANIA.

PRESS.

Specification of Letters Patent.

Patented Feb. 17, 1914.

Application filed October 9, 1911. Serial No. 653,655.

vide a tank or reservoir which will have a constant communication with the shaping die, that is, said die will be like a part of the tank, so that when said tank is filled with liquid, the die will also be filled.

A further object of the invention is to provide an ejector for'removing the article after it has been formed and to provide means for operating said ejector whereby it will be moved the desired distance for eject ing the article and then resume its normal position to permit the operator to place a new piece in the shaping die before the forming die again begins its downward stroke.

I am well aware that presses have been used with water before this, but they do not use a tank in which the shaping die forms a part thereof, or in which the water remains the same, except for loss, throughout the operations and for a considerable length of time.

The press herein described is especially adapted for forming swells in hollow metallic articles, using the liquid as'the expanding element, in which one or both ends of said article are normally open, these open ends being closed by the surfaces, which they come in contact with, said surfaces being the ejector piston and forming die.

With these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, I will describe its construction in detail, referring to the accompanying drawin forming a part of this specification, in w ich l Flgure 1 is a vertical sectional view of the lower part of a press illustrating my improvement, and Fig. 2, arear elevation thereof. Fig. 3 is a. side elevation of a shell or blank to be formed. Fig. 4 is a-similar view of the finished article; and Fig. 5 is a similar view of another form of finished article.

In carrying out my invention as here embodied, 2 denotes the frame of the press and 3 the reciprocating plunger to which is fastened the forming die A.

The bed plate 5 which is mounted upon the press frame has a dieopening 6 therein which is in alinement with the plunger 3, and the lower portion of the die opening is reduced in size as at 7, forming a shoulder or packing surface 8. On the bed plate is mounted a tank or reservoir 9 held in place by screws 10 or their equivalent, and this tank is provided with an aperture 11, the same alining with the die opening 6. In the die opening is placed the shaping die 12. having .a central opening 13 the walls of which are formed in any shape to produce the desired shape in the finished article. In the opening 13 of the die, slides the ejector piston 14, and when this piston is in its normal or lower position itrests upon the shoulder 8 packing the die opening to prevent leakage.

To the ejector piston is attached one end of the piston rod 15 which passed through the opening 7 and rests upon the plate 16 carried by the bars 17 these vbeing pivoted at 18 to some suitable portion of the frame atthe forward end thereof. The bars 17 project rearwardly and straddle the stationary rod 19 on which is a'djustably mounted the inverted conical sleeve 20, said sleeve-being held in the diflerent positions by a setscrew 21. This sleeve is of greater diameter than the space between the bars, thereby causing said bars to separate or move farther apart against the action of the helical springs 22 coiled about the bolt or rod 23 which passes through the bars 17, said springs engaging the bars and the nuts or offsets 24 at the ends of the bolt. 25 is a 7 stop, which may be an enlarged portion of the stationary rod 19, to limit the downward movement of the bars 17 The operatin convenient wor ing part of the ress which will raise and lower said rod, or illustration, I show said rod fastened by means of a connector 27 to the plunger 3. Said operating rod 26 is guided in any suitable manner so that it Wlll pass between the bars 17 on the downward stroke.

On the operating rod 26 is adjustably mounted the inverted conical sleeve 28 smaller in diameter than the conical sleeve 20. When the press plunger isup, the conical sleeve 28 is out of engagement with the bars 17, but when said plunger moves downward the conical sleeve 28 forces the bars 17 apart and passes between them, after which the bars again assume their normal positions and their lower faces will engage the upper face of the conical sleeve 28 and with the upward movement of the p ess, the bars 17 will be drawn upward and impart motion to the ejector piston:

The operation of the device is as follows: The tank or reservoir is partly filled with a liquid which will also enter the shaping die, then the articles may be placed in the tank for convenience or they may be fed directly to the die. In placing the articles in the die, the operator must be sure to fill said article with the liquid to its full capacity. The surface on which the article rests in the die, will close the lower open end, and if the upper end is also open that will be closed by the forming die, then when the pressure of the press-plunger forces the ends of the article toward one another, the liquid will be forced in the directions of least resistance andthese points will be wherever there is a space between the walls of the article and the inner walls of the die or the cavities which pro- Y duce the shape of' the die to which the article is to conform. With the downward movement of the press plunger the operating rod 26 with its conical sleeve will be forced between the bars 17 and draw said bars upward when the plunger rises and this will cause the ejector piston to eject the article from the die. Since the necessary movementof the ejector is very slight, I provide means to limit said movement, and do this by forming the conical sleeve 20 of greater diameter than the sleeve 28, so that as the bars 17 are drawn upward, the bars will be spread apart by the sleeve 20 until the space between the bars is suflicient to allow the passage of the smaller sleeve 28 at which time the ejector piston will have reached its upward limit and said piston and the bars will drop back to their normal positions.

Of course I 'do not wish to be limited to the exact details of construction as here shown, as these may be varied within the rod 26 is attached to some tionary rod lyin limits of the appended claims, without departing from the spirit of my invention.

HaVlIl" thus fully described my invention, what I c aim as new and useful is 1. In combination, a frame, a reciprocating plunger, a forming die carried by said plunger, a bed-plate mounted upon the frame, having a die opening therein, a shaping die mounted in said opening, a reservoir having a hole whereby the liquid in the reservoir will enter the shaping die, means for fastening the reservoir to the bed-plate, an ejector piston mounted to slide in the shaping die, a rod connected to said piston, a pair of approximately parallel bars pivoted to the frame, a plate carried by said bars on which rests the piston rod, a bolt passing through the free ends of the bars, helical springs coiled about said bolt for normally forcing said bars toward each other, a stabetween the bars, an invperted conical s eeve adjustably mounted upon said rod, and adapted to force the bars from each other when said bars are drawn upward, an operating rod having connection with a convenient portion of the press whereby said rod will be reciprocated, and an inverted conical sleeve of smaller diameter than the first-named sleeve adjustably mounted upon the last-named rod, said sleeve adapted'to pass between the bars, in its downward stroke, and draw the latter upward a predetermined distance in its upward stroke thereby causing the ejector piston to remove the finished article from the shaping die.

2. In combination, a frame, a reciprocating plunger, a forming die carried by said plunger, a shaping die adapted to hold a liquid, mounted in alinement with the forming die, an ejector for removing the finished article from the shaping die, and means for operating the ejector so that it will move upward a distance less than the height of the shaping die at the same speed as the plunger and quickly drop to its normal position after the desired upward movement has taken place.

3; In combination, a frame, a reciprocating plunger, a forming die carried by said plunger, a shaping die adapted to hold a liquid, mounted in alinement with the forming die, an ejector piston mountedtto slide in the shaping die, said piston adapted to move upward within proximity to the upper end of the shaping die, when ejecting the finished article, and quickly return to its normal position to prevent the escape of water, said piston in its upward movement drawing in air at the bottom to prevent the escape of water, while the finished article .for a short space of time acts as a valve to prevent water entering the die, a piston rod connected w1tl 1 the ejector piston, means for moving said piston rod a predetermined distance in accordance with the speed of the shortening and shaping the liquid-filled 10 plunger, and means for causing said piston blank placed therein.

rod to drop to its'normal positlon at an in- In testimony whereof I have hereunto creased rate of speed. affixed my signature in the presence of two 4. A shaping press having in combination subscribing Witnesses.

a liquid-containing reservoir, a die having JOHN F. LEWVIS.

one end normally in open connection there- Witnesses:

with and its other end being closed, and a Eow. W. ANs'rm,

plunger adapted to enter said die, thereby l M. H. Lo REE.

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