US1037213A

US1037213A - Extrusion-press.

Info

Publication number: US1037213A
Application number: US60854211A
Authority: US
Inventors: Louis Georges Derain
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-02-14
Filing date: 1911-02-14
Publication date: 1912-09-03
Anticipated expiration: 1929-09-03

Description

L. G. DERAIN.

BXTRUSION PRESS.

APPLICATION FILED FEB. 14, 1911.

Patented Sept. 3, 1912.

L. G. DBRAIN.

BXTRUSION PRESS.

APPLIOATIONPILBD PEB. 14, 1911.

1,037-,21 3, Patented Sept. 3, 1912.

4 SHEETS-SHEET 2.

VV/TNESSES VIZM /jkma L. G. DERAIN. EXTRUSION PRESS.

APPLICATION FILED FBB.14, 1911.

1,037,21 3, Patented sept. 3, 1912.

5/ 49 4 SHEETS-SHEET 3. Figi L. G. DERAIN.

BXTRUSION PRESS.

APPLIOATION FILED 11513.14, 1911.

1,037,21 3, Patented Sept. 3, 1912.

4 SHEETS-SHEET 4.

lll/l,

4 k el t W/VT/vfSSES: gum W E "LOUS GEORGES DERAN, 0F BOULOGNE-SUR-SEINE, NEAR PARIS, FRANCE.

EXTRUSION-ZPRESS.

.To all 'whom t may concern Be it known that I, Louis GEORGES DE- RAIN, of' Boulogne-sur-Seine, near Paris, France, engineer, have invented certain new andv useful Improvements in Extrusion- Presses, of which the following is a, specification.

This invention relates to extrusion presses of the kind in which an ingot raised to atemperature varying with the metal under treatment, but properly determined according to the nature of the metal, is placed in a cylindrical chamber called a container, and is then forced by pressure through an eX- trusion die located at the end of the container. The section of the opening of this die correspondsto the proiile to be produced. Machines as at present employed for this method of manufacture cannot force the whole of the ingotthrough the die, as the plunger for forcing the metal out of the con tainer and through the die cannot be allowed tov come right up against the die Without risk of breakages. Consequently, when the tube, bar or the like is drawn or extruded, it remains attached at one end to a tail piece or sprue located at the entrance 'to 'the die.l

ln order to release the tube, bar or other article, -the die has to be shifted to bring it out of the machine, and the sprue has to be cut oli in 'front of the die, an operation that necessitates shift-ing of the die andcutting ott the sprue hot. During these operations the machine is doing no work, and consefluently the output is greatly reduced.

The present invention dispenses with the operation of cutting oil the sprue hot in the press itself. For this purpose I employ a divided die provided with means whereby the members thereof are adapted to be brought together for the extrusion operatie n and to .be moved apart to permit of the removal of the article.

rlhe die will generally be made 1n two or more parts each of which may be mounted on a plunger, piston, slide or the like. it the end of the extrusion operation the two portions of the die are moved apart allow the tube or article to be withdrawn with 'the sprue attached. The sprue may then be sawed or cut oli' cold in a separate shop. T he manufact-ure can thus proceed without 1nterruption.

`Specification of Letters Patent.

Patented Sept. 3, i912.

Application filed 'February 14, 1911. Serial No. $028,542.

ln a. form of apparatus according to the invention the die is divided longitudinally into two or more parts and is arranged in combination with an ingot container adapted to be moved longitudinally toward and away from the die, and means are provided for moving the port-ions ofthe die apart after suitable retract-ion of the container, so as to nable the article produced to be withdrawn. he container is preferably arranged, and operatedso as to grip or bind upon the die when advanced, and keep the same rmly together 'for the extrusion oieration.

.lhe pistons, plungers, slides or like devices :for carrying the 'arts of the die may be arranged to be moved together and apart by hydraulic or other mec anism, so as to close and open the die at the required times. This operation of the die-carrying devices may be imparted to them by means of the reciprocating movement of the container, through the medium of levers or other suitable devices, so arranged and combined that when the container is retracted the die is opened, and that when the container advances the die is closed. The container is preferably so arranged and operated that after the die parts are brought together :it

envelope and binds or holds them together for the extrusion operation.

According to a further part of the inventionv a resilient connection is provided between 'the die-carrying devices and their operating levers or members, this connect-ion being adapted to come into action when the container colnes upon the arts of the die in enveloping or clamping t 1e same.

The invention comprises further improvements in details, which will appear from the. 4

description and claiming clauses.

The accompanying drawings show by way of example a form of 'the machine constructed to embodythe invention. y Figures l, 2 and 3 represent the machine in longitudinal elevation, plan and end view respectively. Figs. fl, 5 and G are detail longitudinal sections on a larger scale taken on AA Fig. 2 and B B Fig. 3 and showing respectively the front, middle and rear portions o'f the machine. lfigs. 7, 8 and 9 are respectively sections on C D E F, Gr Gr and H H of Fig. 4. Fig. 10 is a detail section of the die. Fig. 'll -is a detail secof such mandrel..

The press comprises `two vertical heads on

ends

1, 2 united by two horizontal stayframes, 3, 3 formed with collars embracing 'the cylindrical extremities of the

heads

1, 2.

The head l is cylindrical and forms a pivot for the cylinder 4, which is constructed for this purpose with half collars or bearings to which are bolted the corresponding mem-

Y bers

5, 5 Fig. 6. By this means the cylinder can be turned around its pivot as required,

which is a matter ofconvenience in erecting fitting or'repairing the press. At the .other end the cylinder 4 is fixed in positionv ad-f justably with relation to the stay frames 3' by bolts 6, Fig. 1. The head' 7 of the piston of the press is fitted in a dovetailseating 81 8a in a carriage or slide 8 (Figs. 1 and 5) guidedby the stay frames ,3k This method of fitting the piston in the cariage facilitates erection' and dismounting. In the slide 8 is fitted a second slide9 adapted to be traversed across the machine and carrying the plunger 10.

The head 11 of the plunger 10 is detachably connected to the plunger for example by a rightv and left handed screw 10a as shown, and can be readily replaced according to the work required. For the production of profile bars of solid section they head 11 will usually be solid. For the production of tubular articles it will generally be constructed hollow as shown for example, in Figs. 4, 11 and 12 so as to provide a cylindrical, or equivalent seating for the head 12 of a solid mandrel 13 corresponding exactly with the interior of the tube to be obtained. u

The ingots employed for the production of tubes are as known formed with a longitudinal hole to give passage to the mandrel which is forced forward by the plunger through the die with .the metal of the ingot. In the constructionshown in Figs. 4 and 11, the head 12 of the mandrel 13y has a shoulder 130 at front and lits with a little friction in a socket 131 at the forward end 11 ofthe plunger, the head 12 and the forward end of the plunger being flush with each other at front and occup ing the'full width of the opening 132v in t e container, and the mandrel being coaxial with the opening and with the die 20, 21. Thus while'the mandrel will move forward with the plunger inI the extrusion operation, the plunger can recede independently of the mandrel if this should. jam inthe extruded tube. At the same time the metal of the ingot 133 cannot penetrate back behind the mandrel if this should tend to be drawn forward by the more rapid flow of the lmetal at the front through the die; onthe contrary there is always opposed tothe back of the met-al of the ingot during extrusion a shoulder or wall occupying the full width of the clear-v ance between the mandrel and the interior of the opening inthe container. The same result can be attained by {itt-ing the endof the mandrel with slight friction on the forward endof the plunger instead. of in a recess therein. Such an arrangementis shown in Fig.v 12. Here the head 12a of the mandrel is seated on'a tenen 131a of the detachable endl 11 of the plunger, the front face of the'mandrel head-12a occupying the whole width of clearance between the mandrel andthe container.

In the production of thick or heavy tubes the mandrelmay be tubular,"in order 'to make itlighter and to enable it to coolmore rapidly. The mandrel lies accurately in the axis of the die 20, 21 and insures equal or symmetrical distribution of the thicknesses ofthe metal.

When the slide 8 is moved back by the ordinary retractor cylinders 14, 15 (Figs. 1 and 2) after the extrusion of the` ingot, the plunger can recede independently of the mandrel. If the mandrel should jam verv tightly inthe tube produced, it .can be left. in and be removed with the tube from the press. Another mandrel can be setin the plunger for the next operation. During this second operation .the first mandrel is withdrawn from the drawn article outside the press and can be used for a third operation, and so on. v

16 is a dowel on the head on the mandrel and litt-ing in the head 11 of the plunger, this allows of setting the mandrel. accurately with relation to the die in cases where the interiorl profile to be produced is not circular.

The carriage 9 can be slid transversely by means of a hand wheell 17 (Fig. 1 when it is desired to uncover the mouth o the container or ingot chamber and the traversing mot-ion also enables the plunger and man` drel to be readily centered relatively to the divided die. A stop is provided to insure that in the return movement the carriage 9 and plunger 10 shall come properly to axial position. bored for its full height and forms a cylinder in which work two pistons or

plungers

18, 19 each carryin one

portion

20, 21 of a specialv two-part ie .(Figs. 4 and 410). These' two

parts

20, 21 bear against the halves 22. 23 of a cylindrical bolster.

The forward head or end 2 is Losams also allows of rapidly changing the die.

For this purpose it is only necessary to move the

plunger

18, 19 apart and then after loosening therbolts 28, thefhalf dies can be turned half around `to release them from their seats, whereupon they can be re moved `from the machine. The operation of the

plungers

18, 19`may be independent and can be effected by any suitable means or source of power. In the example shown these plungers are operated `by .hydraulic power through the medium of the slide 37 hereinafter described .and which actuates the container 34 in which the ingot to be operated upon is placed. This container is constructed in the known way of three

cylinders

32, 33, 34 fitted together so as to torm a block. According to .the invention this container lits and is secured by a nut 35 in conical collar or holder 36 mounted by means of trunnions on a C-shaped slide 37 (Fig. 9) guided by the stay frames 3, 3 similarly to the slide 8. The container is kept in its axial position by two

strong pins

39, 40 vlig. 1. lNhen these have been taken out, the container can be turned on its pivot into any position which may be desired, for the purpose of dismounting it orfor inserting the ingot or for particular operations of the press. For dismounting the container, the

pins

39, 40 are removed, the collar 3G is turned around 90 and the nut 35 is unscrewed. Owing to the taper of the collar 36 the container can be readily removed from the collar.

The slide 37 is adapted to move longitudinally between the stay frames 3 under' the action ofa hydraulic cylinder 38 land itsA movements are imparted lo two bent arms 41, 42 (Fig. 4) attached to slide and passing through the head 2 of the press and the

pistons

18, 19. These arms act as cams upon

rollers

43, 44, 45, 46 mounted on spindles fixed in the

plungers

18, 19 which are thereby caused to move vertically. When the slide 37 moves the container 34 away from the end 2, the

arms

41, 42 act on the rollers 43, 44 and move the pistons apart, thus separating the

parts

20, 21 of the die.

Intth'e reverse movement, when the slide 37 returns the-container 34 against the end 2, the

yarms

41, 42 act on the

rollers

45, 46 and move the two plungers inward so as to bring the vpart-s of the die together, which latter takes place before the container comes upon the conical bearing surface of the die.

A resilient connection is provided between the plungers18', 19 and t-

hearms

41, 42 4by means of the

bearings

47, 48 traction orreturnirods 49, 50 and springs 52-fitted i in boxes 51 (see Fig. 7). -When the

parts

20, 21 of the die come together the

lungers

18, 19 are therefore in resilientrelatlon with the

arms

41, 42. This resilient mounting allows the conicalbearing face of the die to become accurately seated'in the recess provided t'or this purpose in the container, and compels the latter to bind upon and brace the

parts

20, 21 of the die and hold them .powerfully together during the extrusion operation, preventing the compressed metal from forcing 'the die parts away from each other or from penetrating between the piston and the portions of the die. Perfect contact between the. bearing 'fa-ces of the die parts and their sea-t in the container is also secured. It will be seen that this resiliency of the mounting of the

plungers

18, 19 only comes into play when the container comes upon the parts of the die.

The slide 37 may be coupledv directly to i the slide 8 by rods 53 screwing into lugs 54 and secured by nuts. It can then be drawn back by means of the

retractor pistons

14, 15 when it is desired tto obtain access to or remove the

pistons

18, 19. In order to do this, the handwheel 55 is first operated to uncouple the carriage 37 from the rod of the hydrauliccylinder 38.` The handwheel 56 is then operated to release the spring detent 57 and to allow the same to catch and hold the piston l8`suspended. 'lhen the slide 37 isdrawn back and the

plungers

18, 19 can now be readily removed from their cylinder.

Instead of hydraulic pressure l. may employ other fluid pressure or any other power for operating the plunger, container and die actuating members, or any of these parts as may be desired.

What I claim and desire to secure by Letters Patent is y 1. In `an extrusion press for the manilfacture of tubes, bars, rods and the like, a die divided into parts, in combination with acontainer, said container and die being relatively movable, whereby they may be brt'iught together and apart, and means for moving the members of the die apart after t-he separation of the die and container, whereby the extruded article can be released..

2. In an extrusion press for the manufacture of tubes, bars, rods and the like, a die ture of tubes, bars, rods vand the like, a die divided longitudinally into parts, incombination with a container adapted to gri-p and v bind the die when moved toward the same,

means for moving the container toward and away from the die, and means for moving the members of the die together for the eX- trusion operation and for moving them apart after the retraction of th'e container, substantially as described.

4. In an extrusion press for the manufac- 4 ture of tubes, bars, rods and the like, a die divided into parts, members connected to said parts respectively, and means for operating said members to move the die parts together and apart, substantially as and for the purpose described.

vthe container to said die operating meinbers, whereby the die parts are brought together in the motion of the container toward .the same and are moved apart in the reverse motion of the container.

6. In an extrusion press for the manufacture of tubes, bars, rods and the like, a die divided longitudinally into parts, die operating members connected to said die parts respectively and adapted to move the same together and apart, a sliding container, adapted to grip and bind the die when moved up to the same, means for moving said container toward and away from the die, and means for imparting the motion oi the container to said die operating members,

' whereby the die parts are brought together in t-hemotion of the container toward the same and are moved apart in the reverse motion of the container.

7 In an extrusion press for the manufacture of tubes, bars, rods and the like, a die divided into parts, sliding members'connected to said die parts respectively, and means for operating said sliding members to move the die parts together and apart, substantially as and for the purposes de# scribed.

8. In an extrusion press for the manufacture of tubes, bars, rods and the like, a die divided longitudinally into two parts, plungersconnectedto said die parts respectively, a sliding container, means for moving said container toward and away from the die, cam bars in connection with said container, and rollers in connect-ion with saifl plungers and coacting with said cam bars, whereby the die parts are brought together in the movement of the container toward the same and are moved apart in the reverse 'motion of' the container, substantially as described.

` 9. In an extrusion press for the manufacture of tubes, bars, rods and the like, a die divided longitudinally into two parts, plungers connected to'said die parts respectively,a sliding container adapted to grip and bind on the .die when moved up to the same, means for moving said container toward and away from the die, cam bars in connection'with said' container, and rollers in connection with said lplungers and coacting with'said cam bars, whereby the die parts are brought together in the movement ot' the container towardthe same and are moved apart in the reverse motion of the container, substantially as described.

10. In an extrusion press for the manufacture of tubes, bars, rods and the like, a

die divided into parts, a sliding containerv away from the die and means for imparting the motion of said container to said die operating members, said means being adapted to move the die parts together before the end of the forward motion 'of the container and to move them apart when the container has receded from the die.`

' ,12. In an extrusion press for the manufacture of tubes, bars, rods and the like, a die divided longitudinally into parts, dieoperating plungers connected to said parts respectively, a adapted to grip and bind the die, at the end of its forward stroke, a carriage for said conveyer, a hydraulic cylinder and piston for reciprocating said carriage, levers operated'by the reciprocation of said carreciprocating container v riage and adapted in the forward stroke I thereof to move the die operating plungers to close the die partstogether before the end of said forward stroke, and to move the plungers to bring the die parts apart in the backward stroke of the container carriage, substantially as described.

` 13. In an extrusion press for the manufacture of tubes, bars, rods and the like, a die divided into parts, and having a tapered bearing tace, in combination with die-operating members connected to said parts respectively, a reciprocating container adapted to grip and bind en the tapered face ot the die at the end of its forward stroke, power operated means for reciprocating the container, devices connected to said container and adapted to impart the motion near-,21s

thereof tothe die operating members whereby to close the. die part-sin the forwardfstroke of' the-container, and a resilient.

connection between said devices and the die operating members for the purpose specilied.

1.4. In an extrusion press for the manufac# ture of tubes, bars, rods and the like, a die divided longitudinally into parts and having a tapered bearing face, in combination with die operating plungers connected to said parts respectively., a reciprocating container adapted to grip and bind on the tapered face of the die at' the end. of' its forward stroke, power operated means for reciprocating the container, leversconnected to said container and adapted to-irnpart the motion thereof to said plungersto close thev die parts inthe forward stroke of the container and' to open them in its return stroke, and a resilient connection comprising traction rods and springs between saidlevers and said plungers for the purpose specified.

15. In an extrusion press for the manufacture of tubular articles, a divided die and means for moving the die parts together for the extrusion and apart to release the extruded article, .in combination with a container, an extrusion plunger and a mandrel in independent but frict-ional con-- nectiou with said plunger, substantiallyas described.

16. In an extrusion press for the manufacture of tubular articles, a divided die and means for moving the die parts together for the extrusion and apart to release the extruded article, in combination with a container, an extrusion plunger, a detachable end for said plun er and adapted for independent but frictlonal engagement with a mandrel, and a mandrel adapted for inde pendent frictional engagement with said detachable end.

17. In an extrusion ress for the manufacture of tubular articles, a divided die and means for moving the die parts together for the extrusion and apart to `release the extruded article, in combination with a container', an extrusion plunger adapted for independent but frictonal engagement with a mandrel, a mandrel adapted for independent engagement 'with said plunger and to leave a. clearance between itself and the interior of the container in the extrusion, and a body at the rear of the mandrel, adapted to fill the rear of the clearance between the mandrel and the container, andr to prevent back liow of metal when the mandrel is d rawn forward lby the metal under extrusion.

1.8. In an extrusion ross for the manufacture of tubular articles, a divided die and means for moving the die parts trogetlierA for the extrusion and apart to release the extruded article, 1n combinatlon w1th a container, an extrusion plunger provided` with seat for a: headI onthe mandrel, a mandrely adapted toA leave a clearance between itself and the interior of the container inthe extrusion andlhav-ing a head adapted to be fitted independently but with friction to the end. of the plunger, and to present a body at the rear of said clearance for preventing back flow of metal when the mandrel is draw-n 4forward by the metal under extrusion..

19. In an extrusion press for the manufacture of tubes, bars,- rodsand the like,.the combination. of a.` divided die, meansy tor moving the die parts together for the ex tnusion and` apart to' release the' extruded article, container, an extrusion plunger, and a iiuid pressure cylinder and piston for pperating, said plunger, said cylinder being ,pivotally mounted in the press substantially as and'for the purposes specified. 20. In an extrusion press for the manufacture of tubes, bars, rods and the like, the combination-of a divided die, means for moving the die parts together for the extrusion and apart to release the extruded article, a container,A an extrusion plunger,

a slide for reciprocating said plunger, a

tluid pressure cylinder and piston for reciprocating said slide, a traversing slide on said reciprocating slide and carrying said plunger, and means for traversing said traversing slide across vthe machine, substantially as described.

21.In an extrusion press for the manufacture of tubes, rods, bars and the like, the combination of a divided die, means for moving the .die parts together for the extrusion and apart to release the extruded article, an extrusion plunger, a slide for reciprocating said plunger, a fluid ressure cylinder and piston for reciprocating said slide, and a dovetail connection between the head of the piston and said reciprocating s facture of tubes, rods, liars and the like, the

combination of a divided die, means for moving the die parts together for the extrusion and apart to release the extruded article, an extrusion plunger, a pivotally mounted container adapted to Vbe turned into and out of posit-ion coaxial with the plunger', and means for securing the container in said coaxial position, substantially as described.

23. In an extrusion press for the manufacture of tubes, rods, bars and the like, the combination of a divided die, means for moving the die parts together for the extrusion and apart to release the extruded article, an extrusion plunger, a reciprocating slide, a conical holder (38) trunnioned inA said slide, and a conical container mounted in said holder, whereby the centainer can be turned into and out of position coaxial with the plunger, and means for securing the container holder in' the coaxial position, substantially as described.

24. In an extrusion press for the manufacture of tubes, rods, bars and the like, a longitudinally divided die in combination 'with power operated means for closing the f die parts together.

25. In an .extrusion press for the manufacture off tubes, rods, bars and the like, a longitudinally divided die in combination with power operated means for closing the die parts together and for moving the same apart. Y

26. In an extrusion press for the manufacture of tubes, rods, bars and the like, the

combination ,ofy half dies (20, 21) sliding members for closin vand opening the half dies, half bolsters 6, 27). half rings (24, 25) xed to the half bolsters and centering and supporting the halves of the die, and

half collars (26,V 27) for securing the half bolsters tothe said sliding members respectively and clamping the half dies to said half rings, substantially as described.

In Wltness whereof, I have hereunto signed my name in the presence of two subscribing witnesses. f e

LOUIS GEORGES DERAIN.

Witnesses:

J'. E.- DUPEN, C.` -DONIHAN-