DE1529992A1 - Extrusion press with built-in conveyor - Google Patents

Description

Patent attorney

. Wilhelm Reichel

\ Ficmkfuit / Main-l
Λ Paxksiraßeia

MFa. Qo., .. Roe eland, Hev / Jersey / USA

Price £ \ 9 with built-in conveyor

The invention relates to extrusion, in particular to a method and a device for mixing, molding or softening and extrusion or for other shaping clay materials, such as thermoplastic and thermosetting resins »elastomers and the like, which with the simultaneous supply of heat by mechanical work can be deformed Barren weichgeraachfc in order _t su converted into a tough-elastic state.-Ui they turn by Anvrendung. von pressure, for example brought into a desired shape during extrusion or molding We ^- ^ dSi; can. At the end they should be able to solidify and maintain their shape. "

The extrusion described below is intended to tlBB V / eieimacfeen these materials-related * In order to be überführen- in a viscoelastic state, and it is to be further bassiehen on the pressing such weichgemaohter Kähelastischer materials, which is achieved by the fact that these materials a B :. * to be subjected to embarrassment »dVh. a shear between closely spaced opposing surfaces which are rotated relative to one another about an axis which is at an angle to them

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Surfaces runs. When certain materials, such as resins and elastomers, are introduced in this way between closely spaced, relatively rotating surfaces, these materials are quickly softened and thoroughly mixed by the shear to which they are subjected, and converted into a homogeneous tough elastic state. At the same time that they are subjected to rotary shear, a secondary ff ek * occurs, also known as the "Weissenberg Effect ¹¹ (Nature, £ 15, 31o -311 £ 1947]). This effect can be called a force are shown, which runs normal to the direction of vision and has the endeavor to direct the flow of the viscoplastic material against the axis of rotation of the circumferential surfaces.

The gate direction for extrusion, ie the extrusion press in which the materials are softened, is provided with an outlet opening on one of the two surfaces between which these materials are subjected to a Drek shear. This opening is close to or relatively arranged coaxially to Brehachse, such that the force generated by the Weissenberg effect causes the lead tiber in the device in a viscoplastic state materials discharged Ȋ characterized the outlet opening can be squeezed out.

It is the main object of the invention to drive a Strangpressver and to create an apparatus therefor which enables the benefit of highly effective plasticization to be used in such extrusion presses and *> extrusion processes, while avoiding those problems which have hitherto been encountered with the use of such extrusion presses and processes Instruct.

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■ - Although it has been shown that the simple application • of traveling bodies rotating to one another, in an extrusion press, the Weissenberg effect in the tough elastic material is very useful for softening such materials are »so are those produced by the Weissenberg effect Outlet pressures are generally insufficient for the deformed material to be pressed out of the device.

In addition, there have been considerable problems with insertion so far of the materials occurred in the extrusion press. Albeit an introduction by gravity or a fur feed to a point next to the perimeters of the opposite Surface of the extrusion press is often desired, a sol she can In practice, feeding only at extremely slow speeds be performed. It has therefore usually turned out to be Proved necessary the speed, even with grainy Materials »which are to be softened in an extrusion press, to accelerate. With such accelerated feeds, usually .Schneckenförderer, the introduced Material tends to melt or otherwise flowobably during the initial stages of softening becomes, the feed openings are clogged and clogged, and further threatens the seals on the perimeter of the opposite surfaces de :? Extrusion press worked and this clogged in the same way.

It is another essential object of the invention to provide a Provide extrusion press, in which an introduction of the feed materialsB can be done by gravity or an accelerated feed through an opening, in addition to the perimeter of the relative mutually circumferential land opposite working surfaces of the extruder is, with a clogging or agglomeration of the loading material in the vicinity of the inlet opening

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should be prevented and relatively high levels of introduction can be maintained «Ee is one Another important object of the invention is to provide an extruder that can operate even when loaded by gravity the inlet side of the extrusion press creates a sufficiently high bridge, to apply the deformed plant toffee while pressing to allow sufficient that the squeezing is immediate can be done via a press nozzle.

Another object of the invention is ee, a conveyor for an extrusion press that is built into the extrusion press and prevents the whitewashed material from flowing back along the conveyor and an inevitable promotion of the Beschiokungswerkstoffes to the opposing work surfaces guaranteed 1st.

In accordance with the invention, an extruder comprises essentially a taesen-shaped housing into which a rotatable body slides fitted 1st, one end face next to the inner surface of the bottom of the housing, closely spaced therefrom, can be adjusted such that the inner bottom surface of the Housing and the opposing adjacent end face of the body form opposing work surfaces that are tight can be spaced from each other. You side faces of the Bodies are housed within the rare walls of the housing, and the housing and body are with an assembly provided by which they are relative to each other around an acnse can be taken around the rare walls of the housing And the rare surfaces of the body arranged symmetrically

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"Lnd, in such a way that the opposing ground and the end face of the housing or the body can work as an extruder.

With this arrangement is depending on. Expediency, an outlet opening is provided in the vicinity or at the axial center of the bottom surface of the housing or the end surface of the body adjacent thereto. The feed opening for the introduction of BeaohiokungsmaSerial by gravity or pressure is arranged in the side of the housing. The portion of the SeitsnflärHe of the body and the portion of the interior Se ^J te Iwand the housing sswischen this opening and the Umfangsabsohnitten the opposed bottom and front face of the casing and the body form a rotary? Örderebgchnltt, of that of the feed opening to the Utofeng aforementioned opposite surfaces runs.

] n Specifically, the pivot-Pörderabschnitt can be formed by a plurality of blades or eggs surfaces etc.

either on the inner side wall of the housing or preferably are attached to the side surface of the body. These blades are canted in this way in the conveying section (at about the same angle relative to a radial line if there is more than one) that if the housing and the body are rotated relative to each other, the blades extending across the face of the side wall that is opposite to the one to which they are attached, between them

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Με fcerial at the loading opening upwards against the. Drift towards the opposite working surfaces of the extruder. On the working surfaces opposite one another, the shovels or they can continue in a pressurized section in the circumference of the space between the opposing working surfaces end or whether they continue on one of the opposite work surfaces, ea is preferred in most cases and in some cases it is necessary to eat the kenA or passage through which the benching tool is promoted in the space between the opposite work surfaces, and which is delimited by the blades, expanded across the flow path of the material as soon as it opens into the space between the two opposite curses.

It is known that extrusion presses generally develop a great deal of heat due to the turning process to which the operating material is subjected, which often occurs around the locking metal without supplying heat from the outside into the flleseb & rtm ingredients. to convict. No matter whether heat is required from you or not in order to wclohzuuiacben bs & w. The temperature rise in the retjel favors the transition to a technical state. r ^ rc '& r.effect lost gß tan Ιτεηη.

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-.Oaam "the fc * Mun * tat" ι τοη importance, because * the temperature The * Werk toffee brought in la the Wrderabaohnitt in such a way is regulated, AaB en no Stella τογ de «entrance dee Works of tea are opposite work areas the Strict # r «aae the temperature of the plant toffee eo anitaigt, dafi tr fllatber jrtrd. The beeehiokungawerketoff Terbre remains debar In d * Äreh-Wderebeohnitt represents 8trengpreeae practical into a more flowing Suataad, to dal the Soheufeln Push back the possible extent of the work flames

llae derartiga Taespereturregelung identify either duroh fta | {Alung äjr TEMPERE door of the side wall dee Oe sculptural ββ or it Itafa ^ ümj represents Tempetetur represents side surface dea Kttrpere tfdar both "parts are erreloht but & i vorcugeweiee represents represents 8eitenflttohe daa Kurpara temperature.

ftloh dia BasahlokungeOpening in the string wall daa

infested, according to Brt> * flung the housing, anaohl ^ eaaend also || a stator denotes let, vorsuga-

tn aime ^ ortefeataft lay held and the body, ana% mllaaaend also ale motor beaelohnet, is in rotation Verdatet, fa did another important job with it of the invention, a Strengpreeee su aoheffen that one r aufweiat »dar eo attage leads that he is one

nragaltthg »a side surface, a.B. middle" fiaar Mha of interconnected inner canterns ermOglloht, In which a flüeeigee Vftrmettbertrmamgaaedlum can atromen. Check out that the heat transfer medium is in the cold sustend or euoh one · Can take temperature that is below the

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-8th-

The temperature is above that of the filling material will. This depends on the amount of heat to be supplied to the rotor or to be derived from this. In this connection with the invention it is important to note that care must be taken that the opposite working surface of the rotor is kept at a temperature that is smooth that of the working surface of the stator is that they; opposite. Separate temperature control of the rotor surface is therefore desirable.

The invention is now also based on the illustrations described in detail, including all of the description and the Details or characteristics shown in the illustrations Can contribute to the solution of the problem within the meaning of the invention and are included in the application with the intention of being patented became. Show it:

Fl ;. 1 is a side view of a _r extruder according to the invention;

Flg. FIG. 2 shows an enlarged partial sectional view similar to that in FIG. 1 extruder shown;

Flg. 3 is a sectional view along the line IXI-III of FIG. 2 and

Fig. 4 is a rare view before β .Part of the in the figures 1, 2 and 3 shown device.

You extrusion press shown in the drawings according to the invention is generally indicated by the reference number Io

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characterized and essentially has a stator 11, a rotor 12, a feed hopper 13, a press nozzle 14 and a drive device 15.

As in detail from the Flg. 2, the stator 11, which has a cylindrical shape, is on a base plate (see. Fig. 1) attached with its axis running horizontally. The hollow stator 11 is at one end by a End wall 17 closed, while its opposite open end receives the rotor 12. You inner flat surface 18 of the end wall 17 of the stator 11 forms one of the working surfaces of the extruder Io and 1st in the middle with a ^ j Opening 19 is provided, which represents an outlet opening leads to nozzle 14. The nozzle 14 is the usual compression nozzle which is fastened in a cylindrical bushing, which in turn is pushed against the end wall 17 of the stator 11 is so that the nozzle 14 with the interior of the stator 11 over the outlet port 19 is in communication.

The funnel 13 is a filling funnel with a conical Bottom, which is attached to the top of the stator 11, wherein its lower, conical end is in communication with an inlet opening 2o, which sioh through the cylindrical side wall of the stator 11 extends.

The stator 11 is further provided with a series of intercommunicating channels 21 which are in the Abechlußv / and 17 are provided, and with a source a liquid heat transfer medium can while the cylindrical side wall of the Stetor »With a series of interconnected channels 22

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let who en a second source of a heat transfer? mediums can be connected.

The rotor 12 has a cylindrical shape and sits with its cylindrical side surface slidably within the inside of the side wall of the stator 11, whereby a rotation of the rotor 12 is possible about an axis which is coaxial with that of the stator 11. The end face of the rotor 12, which faces the inner end wall 18 of the stator II and is marked by the reference number 23, is flat and forms a work surface opposite the work surface 18 with which it forms the main pressing chamber *.

The rotor 12 consists in one of four main parts,

namely a cylinder block 24, a hollow cylinder 25 with open

Ends, a circular plate 26 and a shaft 27 The cylinder block 24 and the plate 26 have the same outer

durohüiö ear on, while the inner diameter of the cylinder 25 equal to this outer diameter 1st. The plate 26 and the blook 24, which are aligned coaxially to one another, are located within cylinder 25, swirl all three

Parts are firmly connected and a unified

or form a joint construction in which the outside lying surface of the plate 26 is the end face of the rotator 12 and forms the work surface 23.

On his EmU * have la. Plate 26 \ jt, as best seen in Pig »4. ■■ · .- ■ ·; ■; .iat, the cylinder 25 on its outer side with three ai? H ii ^ yr. \ 3ppenc, on Screw en guides 28 provided ^ the dk; same slope rubbed, wove - ', jade screw guide

ton one part approximately in the middle of the cylinder 25 to eum field · fth cylinder 25 next to the plate 26 a full turn Aurohllluft. The other end of the cylinder 25 let with one • Provided its own continuous screw thread 29, which leads to the center of the cylinder 25 and its from the plate 6 pounds distant booth goes through about four turns. Ee will notes that, as from PIf. 2 shows the lengths of the Bohreubenfjüirungen 28 are dimensioned such that when the ^ otor 12 is incorporated into the stator 11, and the end face IJ de Rotore 12 rests against the surface 18 of the Stetore, which ' Fltad «n the guides 28 in the middle of the cylinder end 25 straight \ imterhelb the entry opening 2o in the side wall of the ststora lie.

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rd welter under concession euf the TIg. 4 noted that Umfangarlohtung dee extending end surface 23 of the 2Depending 12 rounded lat and defl the ends 28a of the guides am partially extend on the Sana? 5e ler Fläohe 23rd The hvittbeüftthrungaenden 28o above the rounded band 23s are sawn off or tapered so that the foot section widens these guides when the guides 28 in the hem swlaohen the one of the opposite arbelte surfaces ie and 25 enter. Bin · eolche expansion of Fußebsohnltte * lat desired to announce su that daa Beaohlokungemeterlel

8 screw ducts 28 overburdened or blocked, if 4at Beeohloknngamsterlel the Förderebaohnltt der Strangpreasc 16verllaat, who swleohen the rare dee stator · 11 and the

12 euageblldet let, and In den Welohmaeherabechnltt. bw1aohen Ae «FlMohen XS and 23 occurs, in which the temperature de · Beechiokun LtIi is increased, * o dtß dleaee is fillable.

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A cylindrical hollow shaft 2 "is coaxially attached to the end of the block 24" which is remote from the plate 26, and the end of the shaft which is remote from the blade 24 is in drive connection with a drive device I ¹ J , which will be discussed in more detail below.

The rotor 12 is provided with a number of channels, those in the surfaces of the cylinder 25 and the plate 26 are formed, and which enable a circulation of a liquid heat transfer Bmed: UuH6 that the temperature d3r surfaces of the rotor 12 regulates. In detail is the plate 2 3 on its surface, which rests on the face of the block, provided with a spiral hat 3o, which is on basten can be seen in FIG. 3 «The groove 3o begins at a point next to the edge of the plate 26 and ends a: i a point near the center of the plate. In a similar way The inner cylinder 25 is orphaned on its surface which rests against the side surface of the block 24 with a helical groove 33 provided (see. Fig. 2), the extends from a location close to the plate 26 to a location below the thread 29.

The block 24 is provided at its end remote from the plate 26 with a central opening 32 which is coaxial Zar open center of the shaft 27 is aligned. the opening 32 is stepped and in it are the ends of Screwed in a pair of lines 33 and 34, which are coaxial with one another are arranged and both of which are installed coaxially within the central bore of the shaft 27, an annular Gap between lines 33 and 34 is formed

let. In the block 24 a bore 35 is also formed,

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the this annular ZwiscLenrHiia 3n of the opening 32 with the! side dee block 24, which bears against the VIAT ^ e 26, and the inner end of the slot 3R connects "so that the annular space between the lines 33 and 34 connected to the liute is . .ne bore 36 which the annular space between the lines 33 and; s 4 to the opening 32 with ainer place of the side wall cles block 24 adjacent to the end of the slot 31 relative to: in the same orphan in the block 24 e? the plate 26 connects. In the Blocfc 24 a radial bore 37 is further provided that the line 34 to the opening 32 with a location of the side wall ah of the block 24 connects, in turn, in connection with learning other end of the slot 31? Fc3ht _t during a radial drilling. ng 38 and a longitudinal bore 39 »which are connected to one another in the block 24, with their entoprechs ^ the other ends connected to the Jeitung 34 and the opening 32 and a location on the surface of the block 24, which on the plate 26 are connected anli-sgt, namely at the stella of the outer end of the spiral groove 3o.

Here it can be seen that there are a pair of parallel flow paths extending from the conduit 34, one to the outer end of the spiral groove 3o, from here to its inner end and connecting to the space between the conduits 33 and 34 and i Ie another path from the line 34 to the end of the helical ¹ ; The groove 31 'which lies at a distance from the plate 26 and runs alongside the helical groove 31 to a stella which lies next to the plate 26. and from here ζ iiriick to the annular channel between the lines 33 and 34 is guided. In the end of the block 24, which is remote from the plate 26, a threaded hole 4o is provided,

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which intersects the radial bore 38. In this threaded hole 4o an adjusting screw 41 is screwed in such a way that the adjusting screw 41 can be turned back into a position in which they the flow path of the radial Bore 38 does not affect or that it is in one position can be rotated forward in which it obstructs the flow through the radial bore 38, or, if desired, also interrupts.

The drive device 15 has a motor 42 which is fastened on a gear housing 43, which in turn is mounted displaceably on a guide track 44 parallel to the axis of the shaft 27. The shaft 27 extends into the housing 43, in which it is rotatably mounted on suitable thrust bearings. The shaft 27 also carries a worm wheel 45, which is connected to the motor 42 via a gear chain in the housing 43 and contributes to it Switching on the motor 42 causes the rotor 12 to rotate. A visual spindle 46 enables the drive device 15 to be adjusted relative to the stator 11, which in turn enables the position of the rotor 12 in the stator 11 and thus the clearance between the work surfaces 18 and 23 to be adjusted. The Leitungm 33 and 34 extending in represents shaft 27 by: extending las worm wheel 45, terminate at einor rotary Plüesigkeitskupplungseinheit 47 'the s is the gear housing 43 fixed relative to the stator 11, and are made in AES appropriate connections to a to allow circulation of the medium into the annular space between the lines 33 and 34 and out of the central bore of the line 34. In operation, as shown in Flg. 1 is indicated by the reference numerals 48, connections are made to the lines 21 in order to circulate a liquid heat transfer medium

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to allow, and to regulate the temperature of the end wall 17 and thus of the work surface 18 to a value suitable for softening the Beschiekungamsteriais. Similar connections 19 are made on line 22 to permit circulation of a liquid heat transfer medium and to control the temperature of the side wall of stator 11 to a value below the softening temperature of the feed material. There are also connections 5o to the central bore of the line 34 and to the annular space between the lines 33 and 34 made so that a liquid heat transfer medium circulate and the temperature of the side wall of the cylinder 25 can be regulated to a value below the The softening point of the beach thickness meterial, but preferably close to it, is set in such a way that, during operation, the medium flowing through the groove 3o maintains the temperature of the surface 23 at a suitable value in order to convert the material to be softened to a flat condition , while at the same time the Temperstur of the plate 26 tet kept sufficiently cool or low so as not to increase the temperature of the adjacent cylinder 25 by conduction to a value at which the Beechickungsmaterial is flowable. In practice, it let highly desirable that the working surfaces 18 and 23 are But the same elevated temperature. Since it is usually necessary to dissipate heat from the working surfaces 18 and 23, the liquid circulating in the rotor can then be used to preheat the charge material along the rare wall 25 and to dissipate the heat at the surface. However, if the surface 23 additional heat

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to be added to bring them to a desired temperature to keep the hat can be locked and a separate one Heating means such as an electrical resistance heater can be incorporated into the plate 26.

When starting operation, after filling the funnel 13 and when a liquid circulates in the groove 3o to dissipate heat, and overheating of the side wall 25 by a temporary flow of a strongly heated liquid; to prevent bore 34, whereby the plate is preheated to the operating temperature, the spindle 46 can be actuated and the drive unit 15 and the rotor 12, as can be seen from Figures 1 and 2, move to the left into a position in which the surfaces . 18 and 23 rest against one another. At the same time, a strongly heated liquid is sent briefly through the lines 21 during a period of time in which the temperature of the surface 18 is increased to the desired value. The temperature of the surface 23 is raised at the same time by heat transfer from the surface 18 to the desired operating temperature. The screw spindle 46 is then actuated again to return the rotor and create a clearance which is on the order of /%, i _t 6 to 38 mm (1/16 inch to 1 1/2 inch). The temperature of the liquid in the lines 21 is lowered to its operating or working value and the motor 42 is switched on and begins to rotate in a direction that the feed material from the hopper 13 through the opening 20 by means of the screw guides 28 against the clearance between the opposite work surfaces 18 and 23 is advanced.

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As the feed material is advanced through the screw guides 28, v / heats; the heat transfer medium circulating in the channels 31 and 22 brings the material to a temperature which is immediately below its reached temperature. This is the temperature at which it becomes flowable when the material reaches the periphery of the surfaces 18 and 23. The continued forward movement of new material behind then reached the perimeter of the space between the planes 18 and 23 μ . & n presses this preheated material with considerable pressure between the surfaces 18 and 23. Between these two layers, the material is subjected to heating and a high-speed rotary shear, whereby its softening and furthermore its movement not only under the pressure of the material moving forward behind it , but also under the Weissenberg effect against the axis of the extrusion press " at which the required viscous material is crumbled through the opening 19 and pressed out through the nozzle 14 *

With the device described above, molding pressures in the order of magnitude of 2926 kg / m ² (looo psi) can be generated and asu GeM can be used for processing most thermoplastic and elsstomeric materials that are softenable and otrangpreßbor öind "Due to the short period of time that the Ötranggepresst Materir-i an elevated temperature in the Stynngpreese is exposed, a deterioration of the product is avoided and so-ir thermosetting materials can be used. str ?? ggprreö »t be <Ss oind oomif. Cross reactions can be carried out and the extrusion press Io came? for example for softening, extrusion and vulcanizing at the same time

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Rubber can be used. As was emphasized above in connection with the conveying absence, that is the space between the side walls of the stator 11 and the rotor 12, which is occupied by the screw guide 28. should the temperature of the strand? uprs3senden material be kept below that is fiießbar in dve material YoTheizuiifj or preheating above-mentioned ßegen aum introducing achieving consist In general, however, no objection. .3eui extrusion of polyethylene, which has no fillers, and possesses a high density (at about 250 ° 3? - X2o9 ° C), the crosswind temperatures in the Fö? 2 ° C (15o ° and 2oo ° P), while the temperatures of the st? N.isei '; flat surfaces 18 and 23 can be 148.7 ° to 231.9 ° 0 (3oo to 45o ° i?) .

It is noted that the screw connections 28 are a seal act by making powdered material that is in reverse Direction to work, push back into the Pörderabsclmitt.

It is noted that in the manufacture of extrusions it must be taken into account that many contain contaminants, gas inclusions, and other volatiles which are emitted during the heating of the feed as it is worked between the opposed working surfaces of the extruder. . In. the, · usually escape this oasis äurch the supply, of the Beschiokurigsiaaterial sn powdery or granular.

However, if the Beschiokungaiaatarial v / eder powdery is still granular, for example in the PaIi of Guam * compounds,

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iet it is desired to exhaust valves provided in the extruded casing, so that such gas inclusions or other volatilizable substances can escape and the inclusion of these gases is in the softened extruded material prevented. The structure of the extrusion press is such that the outlet valves can easily be installed 8 m circumference of the opposing work surfaces. In extrusions with a built-in conveyor, as in the head of the invention, however, these outlet valves are built into the side wall of the stetor next to the feed opening.

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Claims (6)

Patent claims 1. An extruder having a device that forms a first surface, a device that forms a second surface which is disposed closely adjacent to and opposite the first surface, with a device for rotating one surface relative to the other about an axis, the forms an angle to the surfaces, wherein in one of the surfaces an outlet opening is provided which feeds out of the tree between the surfaces in the region of the axis of rotation, characterized in that the device which forms the first surface comprises a first side wall which extends away from the tree between the surfaces and is arranged symmetrically to the axis, so that the device which forms the second surface has a second side wall which is arranged symmetrically to the axis and which extends transversely across the tree between the first and second surfaces, and the first rare wall umschlieset that in the second side wall at a point of its longitudinal expansion next to the first side wall a Feed opening is provided that the portion of the first and second side walls between the feed opening and the tree between the first and second surfaces forms a rotary conveyor section that upon relative rotation of the first and second surfaces by the resulting relative rotation of the first and second side walls ,, the feed material introduced at the feed opening in the rotary conveying section to the periphery of the tree between the first and second ^BATH 2. extrusion press n ^ ch claim 1, characterized in that the rotary l ^? örder section has a drive which is arranged helically around the first Sefenwand. 3. Extruder according to claim I ₉ with a hollow stator, which has a cylindrical side wall and a closed end, a cylindrical rotor arranged coaxially in the stator, the end face is arranged close to and opposite the inner surface of the closed end face of the stator, with a device for rotating the rotor within the stator about their common axes, and with an outlet opening in the stator in the area of the axis »characterized in that a feed opening is provided in the side wall of the stator next to the side wall of the rotor, that a rotary conveyor is fixedly arranged on the side of the rotor between the opening and the end face of the rotor ; ,, the opposite of the inner g Front wall of the stator is that the conveyor is in oil contact with the inside of the side wall of the Stator is, and that a device for regulating the temperature of the side wall feet of the stator and the Rotor is provided. 4. Extruder according to claim 3 »characterized in that the rotary conveyor is a Includes screw thread. BAD ORlGiNAL 909887/1310 5. Extruder according to claim 3 or 4, characterized g ekenn ?. e 1 chne> t> that by the control device the temperature of the inner face of the stator and * the face of the rotor versus the temperature of the side wall surfaces on a different one Fourth is adjustable. 6. Extrusion press according to claims 3, 4 or 5 * d a d u r ch gekennsei chnet that in the rotor a first Channel next to its side wall is provided because / i in the rotor a second channel is provided next to its end face, and that means are provided which share the channels rerbindnn and a parallel fluid flow through it allow, wherein a control device for the flow is provided in one channel. 909887/1310