US1352194A

US1352194A - Machine for making cartridge-shells

Info

Publication number: US1352194A
Application number: US227026A
Authority: US
Inventors: Leslie E Hooker
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-04-06
Filing date: 1918-04-06
Publication date: 1920-09-07
Anticipated expiration: 1937-09-07

Description

L. E. HOOKER.

MACHINE FOR MAKING CARTRIDGE SHELLS Patented Sept. 7, 192%,

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APPLICATION FILED APR. 6, I918.

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MACHINE FOR MAKING CARTRIDGE SHELLS.

APPLICAITION FILED APR. 6, 1918.

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L. E. HOOKER.

MACHINE FOR MAKING CARTRIDGE SHELLS."

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L. E. HOOKER.

MACHINE FOR MAKING CARTRIDGE SHELLS.

APPLICATION FILED APR. 5, 191.8. I l I Patented Sept. 7, 1920.

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L. E. HOOKER.

MACHINE FOR MAKING CARTRIDGE SHELLS.

PPLICATION FILED AP Patented'Sept. 7,1920.

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LESLIE E. noqxiin,

\ macnrnn For, MAKING CARTRIDGE-SHELLS.

Specification of Letters Patent. Patented Sept. 7, 1920- j Q p Application filed April 6, 1918. Serial No. 227,026.

To all whom it may concern; I

Be it lmown that I, LESLIE E. HOOKER, a citizen of the United States, res'ding at Lowell, in the county of Middlesex and 5 State of Massachusetts, have invented new and useful Improvements in Machines forv Making Cartridge-Shells, of which the following is a specification. Y My invention relates to the manufacture of small cartridge shells, or other small closed-end tubes, by the method of extrusion which forms the subject' matter of my prior Patent N 0. 922,585, of May 25, 1909.

' It consists in certain improvements which I have made to the machine for carrying out the said method, which machine forms the subject matter of my prior Patent No.

a 918,154, of April 13, 190

As far as the actual extruding operation 0 is concerned, the means employed does not differ from that disclosed in my last-mentioned prior patent, that is to say, the die and punches are the same, the present improvements relating to'the automatic feed 5 of the blanks and the automatic shifting of the punches in time With the strokes of the "pos1tion.

4O punch and one trimming punch, which worked alternately in each die but, in the present machine, only one die is used with one extruding. and one trimming punch, said punches being carried by a slide which 5 reciprocates horizontally on the lower end of the press plunger so as to bringsaid punches alternately in line with the die at each down stroke of the plunger- To increase the output of the machine and to em v 0 able it to extrude a tube at each down stroke, two slides are provided, each carrying a pair of punches, and two dies, one slide moving forwardly while the other is moving backwardly. The blanks are fed, by

5 any desired automatic feeding mechanism, successively into a pocket located at the hind the extruding the die on the blank which it picked up punches in the other slide alternate those of the punches stated. The'cup-shaped blank are previ ously given a quasi-polygonal internal shapebe picked up with cer-- same distance from thedie toward the front as the distance of the trimming punch beup by the extruding punch on the same stroke of the plunger as that on which they trimming punch acts, while, on the next stroke, 'the trimming punch is idle and the extruding punch performs its operation in on the with in the first slide, as

the previous stroke. The operations so that they will tainty and be accurately centered onthe extruding punch.

With this preliminary general statement of the operation of the machine, it will now be described specifically with reference to the accompanying drawings, in which,

Figure 1 is a longitudinal sectional view through one of the dies and the correspond ing punch slide, showing the blank feeding means and the slide operating means, the slide belng 1n its most advanced and lowest Fig. 2 is a similar View showing the slide in its highest position.

Fig. 3 is a similar view showing the slide in its most retracted and lowest position.

Fig. 4 is a plan view of the die-plate and blank feeding means. i Fig. 5 is a plan view of one ofthe cupshaped blanks. a?

. Fig. 6 is a vertical section of the same. 1

Fig.7 is a view similar to Fig. 1 but on a larger scale and showing the punches and blank in section- Fig. 8 is a view similar to Fig. 3, but on a larger scale and'showing the punches and blank in section, the blank-feeding and the slide-operating means being omitted in the last two views, and 1 Fig. 9 is a front end view of the essential' parts of the machine.

The machine employed is an ordinary straight-side dieshaping press, modified to enable it to perform the desired operations. 1 represents the anvil or bed-plate and 2. the reciprocating head or plunger, 3 representing the connecting-rod running to the crankshaft 4, journaled inthe standards 5, between which the plunger is guided, as usual. On the anvil 1 is mounted the die-plate 6 and on the latter the die-holder 7, containsN'r punch, and are picked ing the dies 8, which comprise the bushings if 9 and are similar in everrespect to the dies' of the machine of my "are successively atent No. 918,154 aforesaid. The die-holder 7 also contains the yielding blocks 10, which constitute the bottoms of the pockets into which the blanks fed and from which they arepicked up y the extruding punches, as will be descrlbed. 1 a

- Slidably mounted inhorizontal guides 11,

secured to thebottom of the plunger 2, are

' the punch-carrying slides 12, each having with the strokes of the plunger, by cams 24,

one extruding punch 13 and one trimming punch 14. As in my prior machine patent, the extruding unch consists of a former 15 and a surrounding extruding sleeve 16.

The slides 12 are reciprocated in time fast on the cam-shaft 21, journaled in brackets 20, bolted to the standards 5,, andcarrying a sprocket wheel 22, driven from the crank-shaft 4 by a chain 23; the diameters of the sprocket wheels on the cam-shaft and crank-shaft are so selected that'the crank shaft turns twice as fast as the cam-shaft. Each slide is formed at its rear end into a ,rectan ular yoke 17, provided on its inner vertica faces with wear plates 18, 18, the latter being adjustable to take up wear by means of the wedge-shaped backing piece 19.

The active face of the cam is an arc the picking up from the die while the extruding punch picks up the next blank.

A blank is illustrated in Figs. 5 and 6 at 25; it forms the subiect matter of my gpplication for patent fi ed April 10,1918 er. No. 227,690. It has a plurality of equally-spaced flattened surfaces 26, which are connected by arcs 27 of the original internal periphery. The extruding punch, in' the blank, contacts, of course,

only with sald surfaces with w ich it firmly engages and which act to center the blank upon the'punch so thatlit will be properly I- presented to the die.

' The blanks are fed to the point where they are picked up. by the punch by a suitable feeding mechanism, comprising as. shown a rotating dial plate 28, partially surrounded by a fixed wall 29 and lying beneath fixed guides 30 and 3.1, by which the blanks, which may be placed on the dial plate by hand but are preferably automatically fed thereto by one of thewell known blank feed mechanisms, are guided into and along the guideways 32 until they arrive successively in the pockets 38, composed of the stop-plates 33, mounted on the die-holder 7, the endpiece 34 of the guides 31, and the spring fingers 35. The bottom of the pocket 38 consists of the yielding block 10, above mentioned, slidably mounted in the bushing 36 and pressed upwardly by the spring 37, its upward movement being limlted by a shoulder on the block contacting with the bottom of the bushing, the opening in which is slightly smaller than that in the die-plate. These yielding bottoms tov the pockets prevent reakage in case the ends" of the cup-shaped blanks vary in thickness. The dle-holder 7 is providedwith an opening 39 to receive the trimming punch during its idle stroke, as shown in 1g. 3.

The operation can be understood from what precedes but may be briefly restated as follows;

y The plunger descends with one of the slides 12 in the forward position of Fig. 1;

the extruding punch enters the blank" which has been fed into the pocket 38 while the trimming punch clears the previously extruded tube 40 from the die; the plunger rises and descends again with the slide in the rearward position of Fig. 2; the extruding punch carries the blank into the die and extrudes it into the tube 40, while the trimming punch passes idly into the opening 39. The operations of'the punches in the other slide alternate with those described.

Having thus described my invention, what I claim is: 1. A machine for extruding tubes from cup-shaped blanks, comprising the combination, with the die-holder and reciprocating plunger, of a slide guided on the bottom of the plunger, a cam for reciprocating said slide,- means to drive said cam in timed relation with the plunger, an extruding punch and a trimmin' punch carried by said slide, a die mounte in said die-holder, and a pocketinto which the blanks are fed successively and from which they are lifted by the extruding punch.

2. In the machine .of claim 1., the dieholder containing two dies, a punch carrying slide for each die, and a cam for each slide, a shaft on which the cams are mounted, driving connections to said shaft from the crank-shaft which reciprocates the plunger such that the cam-shaft makes one half 'as many rotations as the crank-shaft, and

the two cams being set 180 apart, whereby, at each down stroke of the plunger, a tube is extruded, another is freed from the die, and a blank is picked up.

3. In a machine of the class described,

the combination with a fixed die and a reciprocating punch, ofa positioning stop for the blanks to be operated on, and means to move the punch laterally to its reciprocating m'otlon, so that it alternately descends in positioned by said stop.

4. In a machine of the class described, the combination of a die-plate, a dieiheld 5 thereon and a blank positioning stop fixed with relation to saiddie, a reciprocating plunger and a punch carried thereby, and means to move said punch on said plunger line with the die' and in line with a blank at 'right angles to its reciprocating movement, whereby the punch descends alter- 1o nately in line with said die and with said blank-positioning stop.

. In testimony whereof I have hereunto set my hand.

LESLIE E. HOOKER.