ES2317504T3 - EXTRUSION PRESS. - Google Patents

Abstract

Extrusion press consisting of: - a die centered on a stretching axis (A) and resting on a support. - a fixed crossbar (100) axially removed from the support, - at least two braces (60) fixed at its ends, respectively on the support and on the fixed crossbar (100) for maintaining, between the latter, a constant distance, - a main stretching cylinder consisting of a tubular body mounted on the fixed crossbar and closed by a bottom (3) on the side opposite the tap, said tubular body that limits a cylindrical chamber (4), is centered on the axis of stretching (A) in which an extrusion piston slides, - a container placed between the support and the fixed crossbar (100) and which limits a housing centered on the axis of the stretching by a metal billet to be stretched by extrusion in the tap, under the action of a main cylinder, characterized in that, the fixed crossbar (100) consists of a single solid monobloc piece made by forging and consisting of a central part (102) that forms the body of the first cylinder ncipal, in which a central boring (101) made by internal machining of a central hole obtained during the forging and forming the chamber of said cylinder, and at least two ear-shaped extensions (105 ad) extending towards the outside from the central part (102) and each traversed by a passage (106 ad) of a fixing end of the corresponding maintenance tie (60 ad), extended between two separate faces, respectively front (107 ad) and rear (108 ad) of said ear (105 ad) on which said fastening ends of the tie (60 ad) rest in two opposite directions.

Description

Extrusion press.

The invention relates to a stretching press by extrusion. More specifically, the invention relates to a fixed crossbar for said press.

It is known that an extrusion stretch press It usually consists of a stretch axis of:

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a fixed front support;

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a rear crossbar also fixed;

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the columns or braces intended to maintain a constant distance between the fixed crossbar and the support;

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a tap, whose axis defines the stretch axis, which rests on the support;

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a container located between the fixed crossbar and the support and that this provided with a housing centered on the stretching axis, which it has a diameter and a length that correspond to the diameter and the length of a billet that should be stretched skewered in this housing, the container has a front face turned towards the support and a rear face turned towards the fixed crossbar,

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a main stretching cylinder, with a cylinder body that is rests on the fixed crossbar and a plunger that determines the extrusion by the metal tap of the billet compressed by the skewer of a rammer in the housing of the container.

Usually, the piston of the main cylinder it rests on a mobile crossbar that moves between the support and the fixed crossbar.

In the method called direct, the container It is fixed and takes support, by a front face, on the tap carried by the support, and the rammer is mounted on the crossbar mobile so that it enters the accommodation, under the action of main cylinder

In the so-called inverse method, the tap is rides on the end of a fixed tubular rammer that rests on the support, and the container takes support on its rear face on the mobile crossbar, so that the housing is skewered on the tubular rammer causing the extrusion of the mental by the tap.

In general, the fixed crossbar of a stretching press constitutes a support for the cylinder body main drawing which, by the advance of the piston, determines the extrusion of the metal by the tap carried by the support. This crossbar tends to move away from the support and must be kept at a constant distance from it by braces that are frequently prestressed

On the other hand, the main cylinder plunger it rests on a movable crossbar that carries the rammer in the straight stretched and pushes the container in reverse stretch. This mobile crossbar must be able to move independently between the support and fixed crossbar for the various maneuvers, by Example of billet loading. To avoid using, with this end, the main cylinder, the movable crossbar is driven by at least for two auxiliary cylinders that rest on the fixed crossbar

Similarly, the container can be moved by means of auxiliary cylinders that also take support on the fixed crossbar

The fixed crossbar, therefore, forms a beam transverse, attached to the support by braces and has a part central support of the main cylinder and the side parts of support of the braces and auxiliary cylinders for maneuvering the mobile and container crossbar.

Until now, that beam was made in mechanically welded construction and included, in the way represented by way of example on figures 1 and 2, two separate plates, perpendicular to the axis of stretching and attached by plates or angles in order to present resistance necessary to fit the extrusion forces.

Usually the main cylinder body it forms a cylindrical cylinder head closed by a bottom and skewered in two circular holes centered on the stretched and laid shaft on the two plates in front and behind the fixed crossbar, the part in front of this stock rests on the front plate by a outer flange shaped collar.

On the other hand, the two plates are provided with holes aligned in pairs and distributed around the cylinder head, in which the ends of the braces and the cylinders are skewered auxiliary

To obtain the desired productivity, the extrusion operations controlled by the main cylinder are they happen at a fairly high rate and after stretching a billet, the mobile crossbar must move between the support and the fixed crossbar by means of the auxiliary cylinders of maneuver to allow billet loading next.

Similarly, during each period, the container moves through the auxiliary cylinders of container maneuver. After loading a new billet, the main cylinder is operated to send the metal extrusion. Consequently, in the course of a cycle, the Fixed crossbar is subjected to variable alternating voltages in intensity and frequency The mechanically welded structure is  therefore subjected to a hard test and its useful life is reduced. The result may be the appearance of cracks in the welds that join the constituent elements of the fixed crossbar. When these fissures become too important, they can be temporarily detected and repaired, but this needs the installation interruption. Moreover, aging premature fixed crossbar may present risks for security.

The invention, therefore, aims at solve the aforementioned problems, proposing a stretch press that contains a fixed crossbar that has a higher resistance to high rates, and therefore a lifespan more important. The purpose of the invention is also to propose a stretch press consisting of a fixed crossbar with a set in simplified operation that allows assembly and disassembly Quick press stretch. The invention also has aim to propose an alternative to existing fixed crossbars proposing a fixed crossbar that is more compact.

The invention also applies to a press of extrusion consisting, in general:

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of a tap centered on a stretched shaft and that rests on a support,

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of a main stretching cylinder consisting of a tubular body closed by a bottom on the opposite side of the tap and that limits a cylindrical chamber centered on the stretching axis and in which an extrusion plunger slides,

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of a fixed crossbar axially removed from the support and on which it takes I support the main cylinder body,

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of a container located between the support and the fixed crossbar and that limits a housing for a metal billet to stretch by extrusion in the tap under the action of the cylinder principal.

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from to minus two braces attached to their ends, respectively on the support and on the fixed crossbar for maintenance between these last of a constant distance,

According to the invention, the fixed crossbar is It consists of a single solid monobloc piece, made by forging and that consists of a central part that forms the cylinder body main, in which a central boring is provided performed by internal mechanization of a central hole obtained during the forging and forming the chamber of said cylinder, and so less than two extensions in the form of ears that extend outwards from the central part and is crossed every one through a passage duct of a fastening end of the tie rod corresponding maintenance, extending between two sides apart, respectively in front and behind said ear, on which is supported, in two opposite directions, the aforementioned extreme of fixing the strap.

In an embodiment particularly advantageous, at least the support faces placed thereon side, respectively front or back, of the ears, are placed on the same plane perpendicular to the stretch axis, so that together form an application face of a fixing plate of the ends of the braces and consisting of one part at the level of each ear, of a support part of the corresponding strap and another part, between two ears, at least one part of support for so less an auxiliary maneuvering organ.

Preferably, the transom ears are extend over a length less than that of the central part, of such that it provides a front support face that lies back from the front end of the central part and on which the front fixing plate rests, it is provided with a central hole in which the end fits front of the central part of the solid crossbar.

Preferably also, the front end of the central part of the solid crossbar is provided with a external facing that has an annular bottom placed at the same level that the front support face and on which it comes to fit the front fixing plate.

In the preferred embodiment, the plate Front fixing interposes between the front support face of each ear and a corresponding strap fixing device which rests on said ear, at least in the opposite direction to the extrusion direction.

Each maintenance brace is skewered in a hollow column that extends between the support and the crossbar fixed and is subject to a prestressing tension taking support on a rear face of the corresponding ear, said hollow column rests, in the opposite direction, on a front face of said ear, preferably through a fixed plate less an auxiliary maneuvering organ.

Preferably, a movable crossbar is mounted axially sliding between the fixed crossbar and the support leaning  on the container in the direction of extrusion, and is actuated by at least two auxiliary maneuver cylinders that each have a body and a rod that rest, respectively, on the solid crossbar and on the mobile crossbar for movement of the latter, the body of each auxiliary maneuver cylinder of the movable crossbar is fixed on a part of the fixing plate front included between two ears of the solid crossbar.

Similarly, the press consists of advantageous of at least two auxiliary maneuver cylinders of the container that each have a body and a stem that are supported respectively, on the fixed crossbar and on the container, the bodies of each container auxiliary maneuver cylinder are fixed on a part of the front fixing plate included between two ears of the solid crossbar.

Preferably still, the body of each cylinder auxiliary maneuver consists of a front end fixed on the front fixing plate in order to rest on it in the sense of extrusion and in the reverse direction, and one end rear that rests on a rear fixing plate fixed on the rear faces of the ears of the solid crossbar.

Preferably, the body of each cylinder maneuvering assistant is skewered in at least one boring of the same diameter arranged at least on the front fixing plate and consists of a parapet that rests on said fixing plate forward at least in the opposite direction to the direction of the extrusion.

Preferably, the cylinder body main consists of a cylindrical tubular part that constitutes the central part of the solid crossbar that surrounds the mandrel that forms the cylinder chamber and a bucket shaped bottom, welded on the perimeter of the boring, at a rear end of the tubular part.

Preferably, the maintenance braces and the ears are centered on planes that pass through the stretch axis and regularly distributed around it.

The invention will be better understood, and others objectives, details, characteristics and advantages of it will appear more clearly in the course of the following description of a particular embodiment of the invention, given only to illustrative and non-restrictive title, referring to the drawings annexes These drawings are:

- Figure 1 represents, in perspective and in partial cut, a fixed crossbar according to the previous type in which a main cylinder body and two auxiliary cylinders are placed of maneuver;

- Figure 2 represents, in cross section, the fixed crossbar according to the previous type of figure 1;

- Figure 3A represents, in axial section, a fixed crossbar according to the invention;

- Figure 3B represents, in a view of in front, the fixed crossbar according to the invention;

- Figure 4 represents, in perspective and in partial cut, the fixed crossbar of figure 3A carrying a mobile crossbar with an auxiliary maneuvering cylinder; Y

- Figure 5 represents, in perspective, the fixed crossbar of figure 3A on which the end of a maintenance tie and an associated hollow column, a auxiliary container maneuver cylinder and an auxiliary cylinder of maneuver of the mobile cross member carrying the mobile cross member associated.

In what follows, the terms "forward" and "rear" allow you to describe the relative position of the elements along the stretch axis A oriented in the direction of stretching, of the fixed crossbar towards the support passing through the tap.

As indicated above, Figures 1 and 2 they represent, by way of example, a fixed crossbar according to the type anterior, forming a beam made in a welded construction mechanically with two skewered frames 10, 12 that limit respectively two circular holes centered on the axis of the stretched A, which forms the front and back faces of a cylindrical housing in which cylinder body 2 is inserted  main stretch that rests, through a collar 20, on the front frame 10 of the fixed cross member 1.

Figures 1 and 2 show only the fixed crossbar and main cylinder body, as well as two auxiliary cylinders The other organs of the press may be of All types known and not represented.

In the embodiment shown, the frames 10 and 12 of substantially square shape, are plates thick metal in which are arranged, respectively, two axial mandrels 11 and 13. The inside diameter of these axial mandrels corresponds to the outer diameter of the body of the cylinder 2 so that it receives the latter. In addition the frames 10 and 12 respectively consist of peripheral mandrels that, of preferably, they are distributed symmetrically around the axis of stretched A. On figure 2, eight mandrills are represented peripherals The frames 10 and 12 consist respectively of a first series of four peripheral mandrels 18 and 18 'intended for receive one end of the maintenance braces that extends between the fixed crossbar 1 and the support. Advantageously, these peripheral mandrels for 18 and 18 'braces are placed in planes axial oriented at ± 45 ° in relation to the horizontal. For another side, frames 10 and 12 consist respectively of a second series of four peripheral mandrels 19 and 19 'intended for support auxiliary maneuver cylinders 70 and 80 (figure 1), allowing to move, respectively, the mobile crossbar or the container, forward or backward along the axis of stretched A. Peripheral boring for cylinders operating aids 19 and 19 'are placed sensitively in the middle from the sides of the frames 10 and 12, in the axial planes horizontal and vertical The front end of the body of a auxiliary maneuvering cylinder is housed in one of the front peripheral mandrels 19 and fixed on the frame front 10, and its end is housed in the peripheral boring corresponding rear 19 and fixed on the rear frame 12.

Frames 10 and 12 depart perpendicular to the axis of smoothing A and are kept at a constant distance by a corresponding dimension structure That forms braces. Figure 2 represents the fixed crossbar 1 in cross-section. The structure between the frames 10 and 12 is constituted by a ferrule 14 and a plurality of plates or angles 16. The constituent elements of this structure are welded together, the structure itself is then welded to the front 10 and rear 12 frames. Keep in mind that the angles 16 of the structure are arranged to reinforce the fixed crossbar 1 at sites where the forces of support of the braces and cylinders and gives the beam so constituted the inertia necessary to resist extrusion efforts. In in particular, the angles 16 are arranged between the two frames 10, 12 to form with the outer surface of the ferrule 14 the reinforcement drawers where the ends of the braces pass 18 and 18 '.

As Figures 3A and 3B show, contrary to the fixed crossbar of the previous type, made in mechanically welded construction, the fixed crossbar according to the invention is constituted by a single solid single piece.
block.

This solid fixed crossbar 100 consists of a central part 102 in which an axial bore is provided main 101 whose axis coincides with the smoothing axis A.

So, while, in the previous type, the fixed crossbar is a simple beam in which the body is skewered of the main cylinder, in the invention, is the central part 102 of the solid piece 100 that constitutes the body of the cylinder whose piston slides in the bore 101 which constitutes therefore the chamber 4 of the main cylinder. This camera 4 is closed, behind, by a bottom 3 constituted, preferably, by a separate cuvette shaped part, welded on the perimeter of the bore 101, at a rear end 103 of the part central 102.

In a known way, each fund 3 could be filled or provided with an axial boring 31 that allows the passage sliding of an extension rod towards the rear of the cylinder piston

This solid fixed cross member 100 according to the invention also comprises at least two ear-shaped extensions that protrude radially outward in relation to the central tubular part 102. According to the preferred embodiment shown on the figures, the solid fixed crossbar 100 consists of four such ears 105 ad.
They are distributed symmetrically around the flattened axis A. For example, the ears 105 ad are arranged in axial planes that pass through the flattened axis A and inclined ± 45 ° with respect to a horizontal plane.

The central part 102 and the ears 105 a-d of the solid crossbar 100 are made in a single piece by forging. The large diameter bore 101 can be perform by internal mechanization of a central hole obtained in The moment of the forge.

The distance maintenance braces constant between solid fixed crossbar 100 and support (no represented) and auxiliary cylinders for container maneuvering and of the mobile crossbar they are supported in two opposite directions, towards forward and backward, on the solid crossbar 100 that constitutes Well, at the same time the cylinder body and the support beam cross.

Each ear 105 ad respectively has the function of providing support at the end of an associated maintenance strap 60 ad (figure 5) to the other end of said strap resting on the support. Each ear 105 ad is traversed by a cylindrical associated conduit 106 ad whose axis B ad is parallel to the stretch axis A. Each conduit 106 ad extends between a front support face 107 ad and a rear support face 108 ad of the ear 105 ad
correspondent. The conduits 106 ad have the function of forming a passage for the fixing end of the corresponding maintenance strap 60 ad.

Advantageously, the different faces of front supports 107 a-d are placed in the same plane front P1 perpendicular to the stretch axis A. The support faces front 107 a-d define together, on the 100 solid fixed crossbar, a front application surface 111. Similarly, the different rear support faces 108 a-d are placed in the same rear plane P2 perpendicular to the fixing axis A. The rear support faces 108 a-d define together, on the solid fixed crossbar 100, a surface of applied rear 113.

In addition, to facilitate the fixation of different auxiliary organs on the ears 105, at least the front application surface 111 is coated with a plate with the corresponding form, with a corresponding central hole to the cylinder body and four star branches that line each One of the ears.

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For that, in the embodiment currently preferred depicted on the figures, ears 105 a-d of the solid fixed crossbar 100 extends over a length shorter than that of the central part 102, so that the front application surface 111 is rearward of the front end 104 of the central part 102.

The 60 a-d braces and the auxiliary maneuver cylinders 70 a-b and 80 a-b take support in two opposite directions on the 100 solid fixed crossbar through a fixing plate front 110 and a rear fixing plate 112. The surface Front application 111 of solid fixed crossbar 100, allows receiving the front fixing plate 110 that rests on said ear in the opposite direction to the direction of extrusion. The rear application surface 113 allows to receive the plate rear fastener 112 that rests on said ear in the direction of extrusion

The front fixing plate 110 consists of a front center hole 116 that fits over one end front 104 of the central part 102 of the solid fixed crossbar 100. Advantageously, the front end 104 of the central part 102 is provided with an external restraint 120 which has a bottom ring placed at the same level as the front application face 111 and in which the front fixing plate is to be fitted 110, this is then provided with a front center hole 116 circular whose inner diameter adapts to the outer diameter of a endorsed 120.

The rear fixing plate 112 includes a central rear hole designed to allow the passage of the bottom 3 so that the rear fixing plate actually comes in flat contact on the rear application surface 113 of the 100 solid fixed crossbar. Moreover, and as represented in figure 5, the back plate 112 is actually constituted by two under plates 112a and 112b arranged respectively on the right and to the left of the bottom 3.

The front fixing plate 110 (respectively the rear fixing plate 112) consists of a first series of front peripheral mandrels for the passage of the braces 118 (respectively rear peripheral mandrels for braces 118 ') intended to cooperate with the conduits 106 ad of such that it supports the end of a maintenance tie 60. Thus, the front fixing plate 110 is interposed between a front support face 107 ad of an ear 105 ad and a corresponding fixing member of the tie rod 60 ad. It must be taken into account that the front and rear fixing plates 112 are attached to the solid fixed crossbar 100 by the maintenance braces
60 ad.

In known manner, the braces are prestressed and, for this, strung each in a hollow column interposed between the support and the fixed crossbar, to prevent its approach under the effect of prestressing.

The end of such a column is represented in the Figure 5 and carries the reference figure 65 a-d. Before the press is put into operation, a prestressing tension on maintenance braces 60 a-d then lean on the back face of support 108 a-d of the ear 105 a-d corresponding eventually through the back plate of fixing 112. Said hollow column, working in compensation, is supports, in the opposite direction of the direction of extrusion, on the front support face 107 a-d of the ear 105 corresponding a-d by plate intermediation front fixing 110.

Fixing plates 110 and 112 support also the auxiliary maneuver cylinders.

For this, the front fixing plate 110 and the rear fixing plate 112 each consist of a second series of peripheral mandrels, respectively front 119 and rear 119 'aligned in pairs and in which the auxiliary maintenance cylinders: for example, as represents on figure 5, on each side of the stretching axis, a auxiliary maneuver cylinder of the mobile cross member 70 is held in the peripheral mandrels 119 and 119 'lower; and a cylinder auxiliary maneuver of the container 80 overlaps the peripheral mandrels 119 and 119 'upper. So, in the mode of preferred embodiment, peripheral mandrels 119 and 119 ', in number of four, symmetrically dispose of one and the other part of a horizontal axial plan.

The body 72, 82 of each auxiliary cylinder of maneuver 70, 80 consists of a front end fixed on the front fixing plate 110, so that it rests on it in the direction of extrusion and in the opposite direction. The extreme rear of the body 72, 82 of each auxiliary maneuvering cylinder 70, 80 is supported by the rear fixing plate 112. In the embodiment considered, the reaction forces of the cylinders or braces are preferably applied on the front fixing plate 110. Accordingly, the plate front fixing 110 is thicker than the fixing plate rear 112. The latter has the function of supporting the auxiliary cylinder bodies to ensure its perfect alignment.

The outer shape of an ear 105 a-d may vary. Preferably, as is depicted in figure 3B, the ears have a shape Polyhedral composed of flat surfaces. In particular, the lower ears may be formed so that they have a horizontal lower surface 109c and 109d that together define a horizontal base plane that allows the fixed crossbar to be supported 100 massif on a concrete slab.

Advantageously, the lower ears 105 c and 105 d respectively consist of grooves that open laterally outward. The undersides of these slots are provided of mandrels leading to said lower surfaces 109c and 109d. These allow you to insert fixing means perpendicular to the horizontal bottom surfaces 109c and 109d to fix the solid fixed crossbar 100 on the slab.

Of course, the invention is not limited in absolute to the particular embodiment just described  by way of simple example and also covers all technical equivalents of the described media as well as their combinations

For example, it is advantageous to carry out the fund of the cylinder chamber in the form of a separate piece welded on the perimeter of the rear hole of the central bore 101 but the fund could also be confused with the crossbar by providing simply a blind boring in the central part of it.

On the other hand, the form and number of ears 105 may vary.

Given the efforts to endure, it is advantageous to pass the straps in the ears, since the auxiliary cylinders are simply mounted on the plates of fixing 110, 112 or even on a single front plate 110, but other provisions are possible, particularly for adapt to the characteristics of the press and its auxiliary organs

Claims (14)

1. Extrusion press consisting of:

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a tap centered on a stretched shaft (A) and that rests on a support.

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a fixed crossbar (100) axially removed from the support,

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to the minus two braces (60) attached to their ends, respectively on the support and on the fixed crossbar (100) for the maintenance, between the latter, of a distance constant,

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a main stretching cylinder consisting of a tubular body mounted on the fixed crossbar and closed by a bottom (3) in the opposite side of the tap, said tubular body that limits a cylindrical chamber (4), is centered on the stretching axis (A) in which an extrusion plunger slides,

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a container placed between the support and the fixed crossbar (100) and that limits a housing centered on the stretch axis by a metal billet to be stretched by extrusion in the tap, under the action of a main cylinder,

characterized because, The fixed crossbar (100) is made up of a single solid monobloc piece made by forging and consisting of a central part (102) that forms the body of the main cylinder, in which a central boring (101) made by internal machining of a central hole obtained during the forging and forming the chamber of said cylinder, and at least two ear-shaped extensions (105 ad) extending outwardly from the central part (102) and each traversed by a conduit (106 ad) of passage of a fixing end of the corresponding maintenance tie (60 ad), extended between two separate faces, respectively front (107 ad) and rear (108 ad)
of said ear (105 ad) on which they rest, in two opposite directions, said fixing ends of the strap (60 ad). 2. Extrusion press according to claim one, characterized because, at least support faces (107 a-d; 108 a-d) placed on a same side, respectively front and back, of the ears (105 a-d) are placed in the same perpendicular plane to the stretching axis (A) so that they form together a face of application (111; 113) of a fixing plate (110; 112) of the ends of the maintenance braces (60) and that consist of a part, at the level of each ear, of a support part of the strap corresponding and on the other hand, between two ears, at least a support part for at least one auxiliary maneuvering body. 3. Extrusion press according to claim 2, characterized because, the ears (105 a-d) of solid fixed crossbar (100) extend over a shorter length to that of the central part (102), so that they have a front support face (111) that is located behind the front end (104) of the central part (102) and on which support the front fixing plate (110), it is provided with a front center hole (116) in which the end fits front of the central part (102) of the solid crossbar. 4. Extrusion press according to claim 3, characterized because, the front end (104) of the central part (102) of the solid fixed crossbar (100) is provided with a counter  external (120) having an annular bottom placed at least level of the front support face (111) and on which the plate fits front fixing (110). 5. Extrusion press according to one of the claims 2 to 4, characterized because, the front fixing plate (110) is interposes between the front support face (107 a-d) of each ear (105 a-d) and an organ of fixation of the corresponding maintenance tie (60) that rests on said ear, at least in the opposite direction to the direction of the extrusion.

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6. Extrusion press according to claim 5, characterized because, each maintenance tie (60) is threaded in a hollow column (65) that extends between the support and the solid fixed crossbar (100) and is subjected to a tensioned tension when supported on a rear support face
(108 ad) of the corresponding ear (105 ad), said hollow column rests, in the opposite direction, on the front support face (107 ad) of said ear (105 ad). 7. Extrusion press according to claim 6, characterized because, said hollow column is supported, through a fixing plate (110) of at least one auxiliary operating element (70; 80), on said front support face (107 a-d) of said ear (105 a-d). 8. Extrusion press according to one of the claims 2 to 7, consisting of a movable crossbar (50) axially mounted sliding between the solid fixed crossbar (100) and the support, and at least two auxiliary maneuver cylinders of the movable crossbar (70) each having a body (72) and a stem (74) that rest, respectively, on the solid fixed crossbar (100) and on the mobile crossbar (50) for displacement independent of the latter, characterized because, the body of each auxiliary maneuvering cylinder of the movable crossbar is fixed on a part of the fixing plate front (110) between the two ears (105 a-d) of the solid fixed crossbar. 9. Extrusion press according to one of the claims 2 to 8, which consist of at least two cylinders container auxiliary maneuvers (80) each having a body (82) and a rod (84) that rest, respectively, on the solid fixed crossbar (100) and on the container, characterized because, the body of each auxiliary maneuvering cylinder of the container is fixed on a part of the fixing plate front (110) included between two ears (105 a-d) of the solid fixed crossbar. 10. Extrusion press according to one of the claims 8 and 9, characterized because, The body of each auxiliary maneuvering cylinder (70; 80) consists of a front end fixed on the front fixing plate (110) so that it rests on it in the direction of extrusion and in the reverse direction, and one end rear that rests on a rear fixing plate (112) fixed on the rear support faces
(108 ad) of the ears (105 ad) of the solid fixed crossbar (100). 11. Extrusion press according to one of the claims 8 to 10, characterized because, the body of each auxiliary maneuvering cylinder (70; 80) is skewered in at least one peripheral boring thereof diameter arranged at least on the front fixing plate (110) and consisting of a parapet that takes support on said plate front fixing, at least in the opposite direction to the direction of extrusion 12. Extrusion press according to one of the previous claims, characterized because, the main cylinder body consists of a cylindrical tubular part constituted by the central part (102) of the solid fixed crossbar (100) surrounding the main axial bore (101) forming the cylinder chamber (4) and a bottom (3) in shape of welded cuvette on the perimeter of the boring, at one end rear (103) of the tubular part. 13. Extrusion press according to one of the previous claims, characterized because, maintenance braces (60) and ears (105 a-d) focus on planes that pass through the axis stretched (A) and distributed regularly around it. 14. Press was extruded, according to one of the previous claims, characterized because the solid fixed crossbar (100) consists of two lower ears (107c, 107d) formed so as to present the lower surfaces (109c, 109d) defining a base plane horizontal for the solid fixed crossbar (100).