US882742A

US882742A - Lead-press.

Info

Publication number: US882742A
Application number: US38319707A
Authority: US
Inventors: David Carlin
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-07-11
Filing date: 1907-07-11
Publication date: 1908-03-24
Anticipated expiration: 1925-03-24

Description

2 SHEETS-SHEET l.

PATBNTED MAR. 24, 1908. D. GARLIN.

LEAD PRESS.

APPLICATION FILED JULY 11, 1907.

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UNITED STATES DAVID cARLIN, or BELLEVUE, PENNSYLVANIA.

LEAD-PRESS.

Specification of Letters Patent.

Patented March 24, 1908.

Application led July 11, 1907. Serial No. 383,197.

To all whom it may concern.'

Be it known that, I, DAVID GARLIN, a citizen of the United States, residing at Bellevue, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful `Improvements in LeadPresses; and I do declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to Which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, Whichl form a part of this specification.

This invention relates to an improvement in lead presses, and it consists in the arrangement of such machines in pairs, side by side, each operating independent of the other and jointly, as desired, and the invention further consists in constructing and arranging the housing and head block from a single casting, thereby eliminating all loose parts and keeping the cylinders and other parts in perfect alinement, which is a very important lfeature, owing to the high pressure and strain upon theparts, and the invention further consists in utilizing the column at the said press being constructed and `arranged in accordance with my invention. Fig. 2 is a sectional plan view of the same, said section taken on the line X-,X, of Fig. 1. Fig. 3 is a vertical section taken through one of the lead cylinders and mandrel, in which a removable and interchangeable bushing is arranged, by means of which various sizes of pipe and special Work may be made. Fig. 4 is an enlarged sectional elevation of the sliding clutches arranged in connection with the front column of ther press, said clutches used for elevating, lowering and manipulating various parts 'of the apparatus. Fig. 5 is an enlarged front elevation of the press, la part of which is in section, showing the manner in which the hydraulic plungers or rams may be easily and y uickly removed or replaced by the use of t e clutches and power of the, second cylinder of the press.

To put my invention into ractioe, l form from cast metal, such as stee` a heav housing or frame, which I prefer `to ma ye in a single piece, said frame comprising a rear plate or backA Wall 1, `With side Webs 2, and outwardly projecting head piece 3 lat the top and two hydraulic cylinders 4 and 5, at the zbase. These several parts of the frame. may be made iro-sections, i desired.

. Extending from the head piece 3, atthe top, to an integral boss on the `trame at the vfron-t of the cylinders 4 5, is a strong colmn 6threaded at the top and bottom and iitted with nuts 7, the said column being used for the double purpose of tying an supporting the head lock 3, to make the same rigid againstthe enormous strain and used for supporting sliding clutches 26 and 26', Which together with the use of the hydraulic cylinders, act as a means for removing and replacing the heavy parts of the presses Will be fully described hereinafter.

lungers or rams -9 and 9', lsaid c linders ,being copper lined and fitted wit inlets 10 at the base for elevating said plungers and second `inlets 11 at the top for-lowering the same, together with the .several valves and connections (not shown) .common to this class ofa paratus. These cylinders are arranged si e by side in a vertical position and are fitted at the top with heads 13, through which the plungers project, and said plungers fitted with a plate or head-piece 14, upon which the

lead cylinders

17 and 17 and mandrel plate 15 are supported. These

lead cylinders

17 and 17 are attached tothe head piece 111-, ofthe

plungers

9 and 9 by bolts16, passing through lugs formed with said cyl- Inders and head pieces. ,Supported by -the mandrel plates 15, and arranged Within the lead cylinders 17,-17, are centrally located, vertically-arranged limandrel bars 18, which are formed with enlarged .tapering base and slender integral roda/which reject .a short v Operating in the cylinders 4 and `5, are` distance above the open top o saidcylinders.,

said base portion being fittedl into a corresponding tapering socketv formed .in the center of the mandrel plate 15. This Inandrel bar 18 is cylindrical in `form and of a diameter equal to that of the inside of the pipe to .be formed by the press. Located over each

lead cylinder

17 and 17 and in direct axial line, are mandrels 1919, having a central bore, a flanged head, through which bolts 21 are passed to securev said mandrel in position to the head block, and each mandrel iitted at thefbase of said bore, with a die 20, the opening of which equals the external diameter of the pipe to be produced.

The operation of the double lead press,l

above described, is as follows. The molten metal is poured into one of the

lead cylinders

17 or 17 to form a charge, said metal being introduced through the medium of a spout (not shown) entered through an opening 35, formed in the rear wall 1 of the frame, located immediately at the rear and above thev top of said cylinder. The charge is permitted to cool to bring the same to the' proper temperature for working.- Pressure is now applied tothe ram 9, at the bottom through the inlet 10, and the work of forcing the charge is commenced. A charge is now placed in the second cylinder in the same manner as before described and the same permitted. tocool until. the charge in the iirst cylinder is exhausted, or until such time as the proper temperature has been reached. When thefirst cylinder is exhausted the pressure is shut off from vbelow and simultaneously turned through the upper inlet 11., to bring the plunger 9 and its connected parts down to their normal position and pressure let into making P l bein built up of a number of parts which the Acylinder 5, to force its plunger upward.

' The irst cylinder is recharged and the operaare iiiicult to keep in such perfect alinement to insure the lead cylinders, the mandrels and plungers or rams in a direct line, the one with the other. With this solid integral frame or housing su'ch trouble cannot occur,

and aside'from this particular advantage the press has double the capacity with practically the same operating expense in so far as actual labor is concerned as it takes the same 'number of men to operate the single as the double press. In connection with this style of lead press, the front column 6, with the hydraulic rams 9-9, are utilized'to remove and replace the heavy parts when changes lare made, which changes are of frequent occurrence in the making of different sizes and weight of pipe and special work,

such as the covering of cables with lead. vThis I accomplish by arranging sliding clutches or carriers, the one 26 above the other 26 the one carrier being mounted directly upon the column 6 and the other 26 upon a flanged sleeve 39, with intermediate ball bearings 31, the several parts being held together by a collar 32, and set screw 33. Each ol" these carriers is provided with short radial arms to form an inclosed space 29, for the reception of suitably placed radial lugs 28 28 on the exterior and integral with the lead cylinders, and each of said lugs and said arms provided With`registering openings in which pins 27-27, are placed to connect said carriers with the lead cylinders. With these carriers, either the lead cylinders may be removed or replaced by simply disengaging the cylinder to be moved from its plunger (as at Fig. 1) connecting or coupling the top carrier 26 thereto and coupling the bottom carrier 26 to the other' cylinder .17. When this has been accomplished, pressure is intro-y duced at the bottom of the hydraulic cylinders 5, causing the plunger 9 to travel upward. carrying both lead cylinders with it until the proper elevation above the plunger 9 is attained,`jat whichtime said lead cylinder to be removed may be swung outward, free kof the press (as in'dotted lines at Fig.v 2) and lowered to a buggy in waiting beneath, uncoupled by removing the pin 27 and swing the carrier freefrom the lug 28. The cylinder thus removed may be transferred to a warming oven or otherwise disposed of. It is obvious that when the cylinders are thus coupled to the carriers, the parts may be either elevated or lowered by manipulating the plunger 9 by introducing the pressure either through the top 11, or bottom inlet 10.

v `At Fig. 5 of the drawings, I have shown.

the manner in which one of the plungers may be removed by the use of the carriers, the

second plunger and a swinging bracket loosely connected at the top of the column 6;

This swinging bracket 36, is heldl at the top of the column 6 by a collar 37, and is free to 'swing in the arc of a circle, and is itted with a pu ley e or grooved Wheel B8. Tol remove one ofthe plungers b the aid of this apparatus, a short section o rope 39 is used; the one end of which is attached to the lower carrier by means of a removable .piece 42, held in position by means of the coupling pi 27 and thel` other end providedwith a hook whereby it may be attached to the head of said t p u nger 9 by means: of a cli 4-1 fastened by short stud bolts, the threa ed openings for which having been formed in said head for this urpose. l f

en the parts are together, as above described, havin rst removed the lead cylinder 17 and t e cylinder head 13 and the plunger 9 being in an elevated position, pressure 1s introduced into the cylinder 4 through vention.

the top inlet 11, tp force said plunger 9 downward, which movement will .lift the second plunger 9 free from its cylinder, and by y' swinging the bracket 36 outward, the same may be lowered to a bu gy or car placed at the front of the press. he plunger 9l to be removed is first elevated by the pressure beneath, to about the position shown in Fig. 5, of the drawings and the hook 40 engaged with the clip 41. l may also be used when special work is called for, for instance, when alloyed metals are used, the melting ofthe same ma be done at a convenient point in front o the press, pou-red into the lead cylinders and swung Into position on the press. By this means two cylinders (one ,on each ress) may be used alternatively, if desirab e, in order to allow suiiicient tlme for charging and coolgIo remove themandrel bars 18 from their sockets in 'the bottom lates 15, the lead cylinders are coupled to tlie carriers as at Fig. 1, of the drawings, and by the use of a small upwardly pro'ecting'tool 42, laced on the head of the plunger 9, and a at piece (not shown) on top of the lead cylinder to reventl its mandrel from entering therein. ressure is now applied in the bottom of the cylinder '4 to move the plunger 9 upward, and as the lead cylinder has been rendered immovable, the pressure is exerted upon the tapering base of the mandrel bar, thereby forcing the same from its socket.

Various slight modiiications and changes ma be made in the details of construction wit out de arting from the spirit of -the inherefore I do not wish to confine myself to the exact construction, shown and described, but wish to claim all such modified forms as would come properly within the general scope of the invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, isga 1. A lead press comprising a frame formed from a single piece of cast metal, said frame comprising a back wall, a head block and two hydraulic cylinders, the back wall being provided with charging peningsfa column connecting the cylinders with the head block, plungersoperating in said cylinders, the one `independent of the other, means for introducing pressure to o crate said plungers,

lead cylinders attache to each of said plungers, mandrel plates between the lead c linders and plungers and provided with soc ets, mandrels located above said lead cylinders and in line therewith, dies located in said mandrels, and mandrel bars located in said The carriers and column i lead cylinders adapted to pass through said dies and having ta eredheads on their lower ends engaging sai purpose described.

2. A frame for a lead press comprising an integrally formed back wall, side walls, head block, and hydraulic cylinders, and a front column for connecting the hydraulic cylinders with the head block.

3. In a hydraulic lead press as described, a supportin frame having a head block, a pair of hydrau ic cylinders carried byy said frame, a front column tying the cylinders to the head block, pllungers operating in said c'ylinders, lead cy 'nders connected to each of said plungers, mandrels carried by the head block 1n line with said lead cylinders, dies located in said mandrels, and mandrel bars locatedv sockets, as and for the in said lead. cylinders adapted to pass through l 'frame embodying a back wall provided with charging openings, side walls, ahead block, and a pair of hydraulic cylinders, the back wall, side walls, head block, and cylinders being in one niece, a front column connecting the cylinders with the head .blockplungers operating in said cylinders, lead cylinders carried by said plungers, mandrels carried by the head block in line with the lead cylinders, dies in said mandrels, mandrel bars in said lead cylinders adapted to pass y and a pair of hydraulic cyllnders carried thereby, of plungers operating in said cylinders, a front column connecting said hydraulic cylinders with the head block, lead cylinders carried by said plungers, slidable carriers on said front column, means for con` necting said slidable carriers with the lead cylinders, a swinging bracket on said column, .and means or connecting said swinging bracket with one of the plungers and with one of said slidable carriers.

In testimony whereof, I affix my slgnature, 1n presence of two witnesses.

DAVID CARLIN.

' Witnesses:

lWM. G. WALTER, O'r'ro A. HENsEL.