EP0557919B1 - Device for mixing and/or kneading materials - Google Patents

Device for mixing and/or kneading materials Download PDF

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Publication number
EP0557919B1
EP0557919B1 EP93102734A EP93102734A EP0557919B1 EP 0557919 B1 EP0557919 B1 EP 0557919B1 EP 93102734 A EP93102734 A EP 93102734A EP 93102734 A EP93102734 A EP 93102734A EP 0557919 B1 EP0557919 B1 EP 0557919B1
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EP
European Patent Office
Prior art keywords
shaft
wedge
arrangement
cross
section
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP93102734A
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German (de)
French (fr)
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EP0557919A1 (en
Inventor
Josef Blach
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/071—Fixing of the stirrer to the shaft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7018—Interfitted members including separably interposed key
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7047—Radially interposed shim or bushing
    • Y10T403/7051—Wedging or camming

Definitions

  • the invention relates to a device for mixing and / or kneading viscous, plastic, powdery or granular materials, consisting of a drivable worm shaft arranged in a tubular housing opening, which consists of a shaft transmitting the torque and a plurality arranged one behind the other and by means of at least one Wedge with a substantially rectangular cross-section rotatably connected with this screw elements as part load, in which the wedge is arranged partly in the shaft and partly in the screw elements that the long sides of the wedge cross section parallel to the tangent to the shaft circumference and its short sides are arranged at right angles to the long sides.
  • Such a device is known (DE-C-813 154).
  • the aim of kneading with this device is to transfer as large an amount of energy as possible from the driven shaft to the material to be processed in the device, which is converted into work in it.
  • the wedge or the wedges between the shaft and screw elements have the task of positioning the screw elements in the correct rotational position on the shaft and guiding the torque during operation from the shaft via the screw elements into the material to be processed.
  • a swelling torsional load of the shaft occurs in only one direction, which stresses it on fatigue strength.
  • Decisive for the load capacity of the shaft is the maximum stress concentration which occurs in the keyway and whose maximum permissible value must not be exceeded.
  • the wedge or wedges are arranged in such a way that their cross-section lies radially and symmetrically about half each in the shaft and in the screw elements. This has a groove base that is not optimally designed against notching and poor access to the groove for inspection and cleaning result.
  • a device for mixing and / or kneading viscous, plastic, powdery or granular substances is also known (EP-A-0 422 272), in which the Auger shaft consists of a shaft and a plurality of kneading blocks arranged thereon.
  • the inner bore of the Kent blocks is provided with several grooves for receiving wedges.
  • the technical problem underlying the invention is therefore to improve the coupling between the shaft and screw elements and the performance of the shaft in such a way that the transmitted torque can be increased without increasing the dimensions.
  • the wedge or the wedges are arranged in the shaft and the screw elements, ie tangentially and asymmetrically, in the manner according to the invention, then can With the same dimensions, a much higher torque can be transmitted with the shaft because the computational security against fatigue fracture increases significantly.
  • Fig. 1 illustrates the cross section of a worm shaft machine, which consists of the shaft 1 and a plurality of screw elements 2 arranged one behind the other and offset in the circumferential direction, of which only one screw element is shown.
  • the screw element 2 is positively coupled to the shaft by the wedges 3.
  • a worm shaft formed in this way is rotatably arranged in the circular inner bore of the housing 4.
  • the worm shaft machine can also be designed so that it has several worm shafts, which requires a corresponding housing. If the worm shaft machine contains two worm shafts, then the inner bore of the housing has the shape of a lying figure eight.
  • the worm shafts can either be driven in opposite directions or in the same direction.
  • arrow 5 shows the direction of rotation of the worm shaft. Operation in the opposite direction of rotation is not possible.
  • each wedge has approximately a rectangular cross section (apart from the rounded corners), which has an outer long side 6, an inner long side 7 and two short sides 8 and 9.
  • the Wedge 3 arranged in the shaft 1 and the screw element such that its long side 6 is congruent with the tangent 10 to the shaft circumference.
  • the long side 7 of the wedge cross section is parallel to the long side 6 and the short sides are perpendicular to the long sides.
  • the position of the wedges in the shaft and the screw element shown in FIG. 2 is the optimal embodiment.
  • the short side 8 is completely immersed in the shaft 1 and the short side 9 is completely immersed in the screw element (not shown in FIG. 2). Therefore, the short sides 8 and 9 of the wedge are only subjected to pressure during operation.
  • the optimal position of the wedges 3 shown in FIG. 2 can be deviated to a certain extent without a significant deterioration in the wedge stress. This could happen, for example, by a slight parallel displacement of the wedge 3 outwards and to the side.
  • FIGS. 3a to 3d show different embodiments of an elastic wedge 3.
  • longitudinal grooves 11 running parallel to the longitudinal edges have been introduced into the wedge, one of which is open on the top and one on the underside of the wedge.
  • oblique cuts 12 are present in the wedge.
  • the cuts run parallel to the longitudinal edges of the wedge or also at right angles thereto.
  • the cuts 14 are only parallel to the longitudinal axes of the wedge, but have a different arrangement than in FIG. 3c.
  • wedges 3 show another embodiment of the wedges 3. These wedges are not designed to be resilient, but rather solid. They also have long pages 6 and 7 and short pages 8 and 9. However, the short side 8 is designed in the manner of a fillet and an elastic tube 15 is arranged between it and the opposite groove wall in the shaft.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Paints Or Removers (AREA)
  • Accessories For Mixers (AREA)

Abstract

The invention relates to a worm shaft machine, in which the worm shaft consists of a driven shaft on which a plurality of worm elements is arranged and coupled to the shaft in a torsion-proof manner. Coupling is effected in a positively locking manner by means of wedges which are in part arranged in the shaft and in part in the worm elements. It is proposed to arrange the wedges in such a way that there are no shearing forces acting on them. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Mischen und/oder Kneten von viskosen, plastischen, pulverförmigen oder körnigen Stoffen, bestehend aus einer in einer rohrförmigen Gehäuseöffnung angeordneten antreibbaren Schneckenwelle, welche aus einer das Drehmoment übertragenden Welle und einer Mehrzahl auf dieser hintereinander angeordneten und mittels wenigstens eines Keiles mit im wesentlichen rechteckigem Querschnitt drehfest mit dieser verbundenen Schneckenelementen als Teillastabnehmer besteht, bei der der Keil derart teils in der Welle und teils in den Schneckenelementen angeordnet ist, daß die langen Seiten des Keilquerschnitts parallel zur Tangente an den Wellenumfang und seine kurzen Seiten im rechten Winkel zu den langen Seiten angeordnet sind.The invention relates to a device for mixing and / or kneading viscous, plastic, powdery or granular materials, consisting of a drivable worm shaft arranged in a tubular housing opening, which consists of a shaft transmitting the torque and a plurality arranged one behind the other and by means of at least one Wedge with a substantially rectangular cross-section rotatably connected with this screw elements as part load, in which the wedge is arranged partly in the shaft and partly in the screw elements that the long sides of the wedge cross section parallel to the tangent to the shaft circumference and its short sides are arranged at right angles to the long sides.

Eine solche Vorrichtung ist bekannt (DE-C-813 154). Das Ziel beim Kneten mit dieser Vorrichtung besteht darin, von der angetriebenen Welle eine möglichst große Energiemenge auf den in der Vorrichtung zu bearbeitenden Stoff zu übertragen, welche in ihm in Arbeit umgesetzt wird. Der Keil oder die Keile zwischen Welle und Schneckenelementen haben die Aufgabe, die Schneckenelemente in der richtigen Drehstellung auf der Welle zu positonieren und das Drehmoment während des Betriebs von der Welle über die Schneckenelemente in den zu bearebitenden Werkstoff zu leiten.Such a device is known (DE-C-813 154). The aim of kneading with this device is to transfer as large an amount of energy as possible from the driven shaft to the material to be processed in the device, which is converted into work in it. The wedge or the wedges between the shaft and screw elements have the task of positioning the screw elements in the correct rotational position on the shaft and guiding the torque during operation from the shaft via the screw elements into the material to be processed.

Bei der bekannten Vorrichtung tritt eine schwellende Torsionsbelastung der Welle in nur einer Richtung auf, welche diese auf Dauerfestigkeit beansprucht. Maßgebend für die Belastbarkeit der Welle ist die maximale Spannungskonzentration, welche in der Keilnut auftritt und deren maximal zulässiger Wert nicht überschritten werden darf. Der Keil bzw. die Keile sind in der Weise angeordnet, daß ihr Querschnitt radial und symmetrisch etwa je zur Hälfte in der Welle und in den Schneckenelementen liegt.Das hat einen gegen Kerbwirkung nicht optimal gestalteten Nutgrund und eine schlechte Zugänglichkeit der Nut zwecks Prüfung und Reinigung zur Folge.In the known device, a swelling torsional load of the shaft occurs in only one direction, which stresses it on fatigue strength. Decisive for the load capacity of the shaft is the maximum stress concentration which occurs in the keyway and whose maximum permissible value must not be exceeded. The wedge or wedges are arranged in such a way that their cross-section lies radially and symmetrically about half each in the shaft and in the screw elements. This has a groove base that is not optimally designed against notching and poor access to the groove for inspection and cleaning result.

Es ist auch eine Vorrichtung zum Mischen und/oder Kneten von viskosen,plastischen, pulverförmigen oder körnigen Stoffen bekannt (EP-A-0 422 272), bei der die Schneckenwelle aus einer Welle und einer Mehrzahl auf dieser angeordneten Knetblöcken besteht. Die Innenbohrung der Kentblöcke ist mit mehreren Nuten für die Aufnahme von Keilen versehen.A device for mixing and / or kneading viscous, plastic, powdery or granular substances is also known (EP-A-0 422 272), in which the Auger shaft consists of a shaft and a plurality of kneading blocks arranged thereon. The inner bore of the Kent blocks is provided with several grooves for receiving wedges.

Das der Erfindung zugrunde liegende technische Problem besteht deshalb darin, die Kopplung zwischen Welle und Schneckenelementen und die Leistungsfähigkeit der Welle in der Weise zu verbessern, daß das übertragene Drehmoment ohne Vergrößerung der Abmessungen erhöht werden kann.The technical problem underlying the invention is therefore to improve the coupling between the shaft and screw elements and the performance of the shaft in such a way that the transmitted torque can be increased without increasing the dimensions.

Dieses technische Problem ist erfindungsgemäß durch folgende Anordnung des Keils gelöst :

  • a) die zum Schneckenelement hin gerichtete lange Seite des Keilquerschnitts ist in etwa deckungsgleich mit der Tangente und liegt im wesentlichen im Schneckenelement,
  • b) die zur Welle hin gerichtete lange Seite des Keilquerschnitts liegt im wesentlichen in der Welle,
  • c) die in zur Drehrichtung der Welle entgegengesetzten Richtung liegende kurze Seite der Keilquerschnitts liegt im wesentlichen in der Welle,
  • d) die in Drehrichtung der Welle liegende kurze Seite des Keilquerschnitts liegt im wesentlichen im Schneckenelement,
  • e) die in der Welle bzw. im Schneckenelement aneinander stoßenden langen und kurzen Seiten sind im wesentlichen im rechten Winkel zueinander angeordnet und bilden eine offene, abgerundete Ecken aufweisende Nut.
According to the invention, this technical problem is solved by the following arrangement of the wedge:
  • a) the long side of the wedge cross section directed towards the screw element is approximately congruent with the tangent and lies essentially in the screw element,
  • b) the long side of the wedge cross section directed towards the shaft lies essentially in the shaft,
  • c) the short side of the wedge cross section lying in the direction opposite to the direction of rotation of the shaft lies essentially in the shaft,
  • d) the short side of the wedge cross section lying in the direction of rotation of the shaft lies essentially in the screw element,
  • e) the long and short sides abutting one another in the shaft or in the screw element are arranged essentially at right angles to one another and form an open, rounded corner groove.

Wenn der Keil oder die Keile in der erfindungsgemäßen Weise in der Welle und den Schneckenelementen, d.h. tangential und asymmetrisch, angeordnet sind, dann kann bei gleichen Abmessungen mit der Welle ein wesentlich höheres Drehmoment übertragen werden, weil sich die rechnerische Sicherheit gegen Dauerbruch wesentlich erhöht.If the wedge or the wedges are arranged in the shaft and the screw elements, ie tangentially and asymmetrically, in the manner according to the invention, then can With the same dimensions, a much higher torque can be transmitted with the shaft because the computational security against fatigue fracture increases significantly.

Mit bei Druckbeanspruchung federnden Keilen ergigt sich eine verbesserte radiale und axiale Lastaufteilung mit wenigstens zwei, in der gleichen Drehrichtung wirkenden Keilen. Die derart verbesserte dreidimensionale Wirksamkeit vermindert die Flächenpressung wesentlich und erlaubt eine Verringerung des Flächenverbrauchs für die Keile.With wedges resilient under pressure, improved radial and axial load distribution is achieved with at least two wedges acting in the same direction of rotation. The three-dimensional effectiveness improved in this way significantly reduces the surface pressure and permits a reduction in the space consumption for the wedges.

Es ist nicht mehr erforderlich, die Keile in der Welle mittels Preßsitz zu befestigen, sondern sie können mit geringem Spiel federnd zwischen Welle und Schneckenelementen eingeschoben werden. Das vereinfacht auch die spätere Demontage der Schneckenwelle. Ein weiterer Vorteil besteht darin, daß die Schneckenelemente wegen der asymmetrischen Lage der Keile nur in einer bestimmten Lage unverwechselbar auf der Welle aufgeschoben werden können.It is no longer necessary to fix the wedges in the shaft by means of a press fit, but they can be inserted resiliently between the shaft and screw elements with little play. This also simplifies the later disassembly of the worm shaft. Another advantage is that, due to the asymmetrical position of the wedges, the screw elements can only be pushed unmistakably onto the shaft in a certain position.

Vorteilhafte Einzelheiten der Erfindung sind in den Ansprüchen 2 bis 6 enthalten. Sie ist nachstehend anhand der Figuren 1 bis 4 erläutert. Es zeigen :

Fig. 1
den prinzipiellen Aufbau einer Schneckenwellenmaschine im Querschnitt,
Fig. 2
in vergrößerter Darstellung den Querschnitt der Welle mit den Keilen,
Fig. 3a bis 3d
verschiedene Ausführungsformen des Keils im Querschnitt und in der Draufsicht und
Fig. 4
den Querschnitt einer Welle mit einer anderen Ausführungsform der Keile.
Advantageous details of the invention are contained in claims 2 to 6. It is explained below with reference to FIGS. 1 to 4. Show it :
Fig. 1
the basic structure of a worm shaft machine in cross section,
Fig. 2
in an enlarged view the cross section of the shaft with the wedges,
3a to 3d
different embodiments of the wedge in cross section and in plan view and
Fig. 4
the cross section of a shaft with another embodiment of the wedges.

Fig. 1 verdeutlicht den Querschnitt einer Schneckenwellenmaschine, welche aus der Welle 1 und mehreren hintereinander und in Umfangsrichtung gegeneinander versetzt angeordneten Schneckenelementen 2 besteht, von denen nur ein Schneckenelement gezeigt ist. Das Schneckenelement 2 ist durch die Keile 3 formschlüssig mit der Welle gekoppelt. Eine auf diese Weise gebildete Schneckenwelle ist drehbar in der kreisförmigen Innenbohrung des Gehäuses 4 angeordnet. Die Schneckenwellenmaschine kann auch so ausgebildet sein, daß sie mehrere Schneckenwellen besitzt, welches ein entsprechendes Gehäuse erforderlich macht. Wenn die Schneckenwellenmaschine zwei Schneckenwellen enthält, dann weist die Innenbohrung des Gehäuses die Form einer liegenden Acht auf. Die Schneckenwellen können entweder gegensinnig oder gleichsinnig angetrieben sein. In Fig. 1 zeigt der Pfeil 5 die Drehrichtung der Schneckenwelle an. Ein Betrieb in entgegengesetzter Drehrichtung ist nicht möglich.Fig. 1 illustrates the cross section of a worm shaft machine, which consists of the shaft 1 and a plurality of screw elements 2 arranged one behind the other and offset in the circumferential direction, of which only one screw element is shown. The screw element 2 is positively coupled to the shaft by the wedges 3. A worm shaft formed in this way is rotatably arranged in the circular inner bore of the housing 4. The worm shaft machine can also be designed so that it has several worm shafts, which requires a corresponding housing. If the worm shaft machine contains two worm shafts, then the inner bore of the housing has the shape of a lying figure eight. The worm shafts can either be driven in opposite directions or in the same direction. In Fig. 1, arrow 5 shows the direction of rotation of the worm shaft. Operation in the opposite direction of rotation is not possible.

Aus Fig. 2 ist die Lage des Keils oder der Keile 3 zu erkennen. Sie sind asymmetrisch zu einem gedachten Fadenkreuz am Umfang der Welle angeordnet. Jeder Keil weist in etwa einen rechteckigen Querschnitt auf ( von den abgerundeten Ecken abgesehen ), welcher eine äußere lange Seite 6, eine innere lange Seite 7 und zwei kurze Seiten 8 und 9 aufweist. Wie aus Fig. 2 weiter zu erkennen, ist der Keil 3 derart in der Welle 1 und dem Schneckenelement angeordnet, daß seine lange Seite 6 mit der Tangente 10 an den Wellenumfang deckungsgleich ist. Die lange Seiet 7 des Keilquerschnitts ist parallel zur langen Seite 6 und die kurzen Seiten liegen rechtwinklig zu den langen Seiten.The position of the wedge or wedges 3 can be seen from FIG. They are arranged asymmetrically to an imaginary crosshair on the circumference of the shaft. Each wedge has approximately a rectangular cross section (apart from the rounded corners), which has an outer long side 6, an inner long side 7 and two short sides 8 and 9. As can also be seen from FIG. 2, the Wedge 3 arranged in the shaft 1 and the screw element such that its long side 6 is congruent with the tangent 10 to the shaft circumference. The long side 7 of the wedge cross section is parallel to the long side 6 and the short sides are perpendicular to the long sides.

Bei der in Fig. 2 gezeigten Lage der Keile in der Welle und dem Schneckenelement handelt es sich um die optimale Ausführungsform. Die kurze Seite 8 taucht vollständig in die Welle 1 ein und die kurze Seite 9 taucht vollständig in das - in Fig. 2 nicht gezeigte - Schneckenelement ein. Daher werden die kurzen Seiten 8 und 9 des Keils im Betrieb nur auf Druck beansprucht.The position of the wedges in the shaft and the screw element shown in FIG. 2 is the optimal embodiment. The short side 8 is completely immersed in the shaft 1 and the short side 9 is completely immersed in the screw element (not shown in FIG. 2). Therefore, the short sides 8 and 9 of the wedge are only subjected to pressure during operation.

Von der in Fig. 2 gezeigten optimalen Lage der Keile 3 kann in einem bestimmten Umfang ohne wesentliche Verschlechterung der Keilbeanspruchung abgewichen werden. Das könnte beispielsweise durch eine geringfügige Parallelverschiebung des Keils 3 nach außen und zur Seite geschehen.The optimal position of the wedges 3 shown in FIG. 2 can be deviated to a certain extent without a significant deterioration in the wedge stress. This could happen, for example, by a slight parallel displacement of the wedge 3 outwards and to the side.

Die Figuren 3a bis 3d zeigen verschiedene Ausführungsformen eines elastischen Keils 3. Bei der Ausführungsform gemäß Fig. 3a sind in den Keil parallel zu den Längskanten verlaufende Längsnuten 11 eingebracht worden, von denen eine auf der Oberseite und eine auf der Unterseite des Keils offen ist.FIGS. 3a to 3d show different embodiments of an elastic wedge 3. In the embodiment according to FIG. 3a, longitudinal grooves 11 running parallel to the longitudinal edges have been introduced into the wedge, one of which is open on the top and one on the underside of the wedge.

Bei der Ausführungsform gemäß Fig. 3b sind in dem Keil schräg verlaufende Schnitte 12 vorhanden.In the embodiment according to FIG. 3b, oblique cuts 12 are present in the wedge.

Bei dem Ausführungsbeispiel gemäß Fig.3c verlaufen die Schnitte parallel zu den Längskanten des Keils oder auch im rechten Winkel dazu.In the exemplary embodiment according to FIG. 3c, the cuts run parallel to the longitudinal edges of the wedge or also at right angles thereto.

Bei dem Ausführungsbeispiel gemäß Fig. 3d liegen die Schnitte 14 nur parallel zu den Längsachsen des Keils, weisen jedoch eine andere Anordnung als in Fig. 3c auf.In the exemplary embodiment according to FIG. 3d, the cuts 14 are only parallel to the longitudinal axes of the wedge, but have a different arrangement than in FIG. 3c.

Fig.4 zeigt eine andere Ausführungsform der Keile 3. Diese Keile sind nicht federnd, sondern massiv ausgebildet. Sie weisen auch lange Seiten 6 und 7 sowie kurze Seiten 8 und 9 auf. Jedoch ist die kurze Seite 8 in der Art einer Hohlkehle ausgebildet und zwischen ihr und der gegenüberliegenden Nutwand in der Welle ist ein elastisches Rohr 15 angeordnet.4 shows another embodiment of the wedges 3. These wedges are not designed to be resilient, but rather solid. They also have long pages 6 and 7 and short pages 8 and 9. However, the short side 8 is designed in the manner of a fillet and an elastic tube 15 is arranged between it and the opposite groove wall in the shaft.

Claims (6)

  1. Arrangement for mixing and/or kneading of viscous, plastic, powder-shaped or grain materials, which has a driveable screw shaft arranged in a tubular housing opening, and composed of a shaft which transmits the torque, and of a plurality of screw elements arranged on said shaft one behind the other and fixedly connecting said shaft by at least one wedge having a substantially rectangular cross-section and operating for partial load distribution, with said wedge being partially arranged on said shaft and partially in said screw elements so that the longer sides of said wedge cross-section extend parallel to a tangent to the shaft periphery, and its shorter sides are arranged at a right angle in relation to said longer sides,
    characterized by the following arrangement of said wedge:
    a) the long side (6) of said wedge cross-section facing said screw element almost substantially coincides with the tangent (10), and is located substantially in said screw element (2),
    b) the long side (7) of said wedge cross-section facing said shaft is located substantially in said shaft (1),
    c) the short side (8) of said wedge cross-section extending in the direction which is opposite to the rotary direction of said shaft (1), is located substantially in said shaft (1),
    d) the short side (9) of said wedge cross-section extending in the rotary direction (5) of said shaft (1), is located substantially in said screw element (2),
    e) said longer and shorter sides (7,8 and 6,9) abutting against one another in said shaft (1) or said screw element (2) respectively, are arranged substantially at a right-angle relationship to one another, and form a groove which is open and has rounded corners.
  2. An arrangement as claimed in claim 1, characterized in that the cross-section of said wedge (3) can have a side ratio of the shorter to the longer sides between 1 : 3 and 1 : 6.
  3. An arrangement as claimed in claims 1 and 2, charactreized in that there are provided two identical wedges (3) for acting in the same direction.
  4. An arrangement as claimed in claims 1 to 3, characterized in that said wedges (3) are formed as spring members.
  5. An arrangement as claimed in claims 1 to 4, characterized in that said wedges (3) are provided with cutouts and/or grooves (11, 12, 13, 14).
  6. An arrangement as claimed in claim 1, characterized in that an elastic tubular element (15) is located between the short side (8) of said wedge (3) and the groove wall of the said shaft (1) lying opposite.
EP93102734A 1992-02-28 1993-02-22 Device for mixing and/or kneading materials Expired - Lifetime EP0557919B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4206219 1992-02-28
DE4206219A DE4206219A1 (en) 1992-02-28 1992-02-28 DEVICE FOR MIXING AND / OR KNOWING MATERIALS
US08/014,372 US5314245A (en) 1992-02-28 1993-02-05 Arrangement for mixing and kneading of materials with a screw shaft and at least one screw element connected with one another by wedges

Publications (2)

Publication Number Publication Date
EP0557919A1 EP0557919A1 (en) 1993-09-01
EP0557919B1 true EP0557919B1 (en) 1996-06-05

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US (1) US5314245A (en)
EP (1) EP0557919B1 (en)
JP (1) JP3176747B2 (en)
AT (1) ATE138829T1 (en)
DE (2) DE4206219A1 (en)

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US7188992B2 (en) * 2003-07-30 2007-03-13 Americhem, Inc. Kneading element and related articles
US7192178B2 (en) * 2004-02-19 2007-03-20 J. C. Steele & Sons, Inc. Extrusion auger with removable auger segments and removal tool
FR2971190B1 (en) * 2011-02-09 2013-03-08 Michelin Soc Tech SCREWS FOR THE EXTRUSION OR MIXING OF ELASTOMERS OR PLASTIC PRODUCTS FOR THE MANUFACTURE OF TIRES
US20160061249A1 (en) * 2014-08-29 2016-03-03 Douglas H. Powell Adjustable shear key
DE102015005790A1 (en) * 2015-05-10 2016-11-10 Reifenhäuser GmbH & Co. KG Maschinenfabrik Screw for use in an extruder, method for converting a screw and extruder

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Also Published As

Publication number Publication date
DE4206219A1 (en) 1993-09-02
US5314245A (en) 1994-05-24
JP3176747B2 (en) 2001-06-18
DE59302775D1 (en) 1996-07-11
JPH07251053A (en) 1995-10-03
EP0557919A1 (en) 1993-09-01
ATE138829T1 (en) 1996-06-15

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