EP0557919B1 - Dispositif pour mélanger et/ou malaxer des matériaux - Google Patents

Dispositif pour mélanger et/ou malaxer des matériaux 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
Authority
EP
European Patent Office
Prior art keywords
shaft
wedge
arrangement
cross
section
Prior art date
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
Application number
EP93102734A
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German (de)
English (en)
Other versions
EP0557919A1 (fr
Inventor
Josef Blach
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0557919A1 publication Critical patent/EP0557919A1/fr
Application granted granted Critical
Publication of EP0557919B1 publication Critical patent/EP0557919B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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.

Claims (6)

  1. Dispositif pour mélanger et/ou malaxer des matériaux visqueux, plastiques, pulvérulents ou granuleux, formé d'un arbre à vis apte à être entraîné qui est disposé dans une ouverture de carter tubulaire et qui se compose d'un arbre transmettant le couple de rotation et de plusieurs éléments à vis disposés les uns derrière les autres sur cet arbre, solidaires en rotation de celui-ci grâce à au moins une cale à section transversale globalement rectangulaire, et servant de consommateurs de charge partielle, la cale étant disposée en partie sur l'arbre et en partie dans les éléments à vis de telle sorte que les côtés longs de la section transversale de la cale sont parallèles à la tangente au niveau de la périphérie de l'arbre tandis que ses côtés courts sont disposés à angle droit par rapport aux côtés longs,
    caractérisé par la disposition suivante de la cale :
    a) le côté long (6) de la section transversale de la cale qui est dirigé vers l'élément à vis coïncide à peu près avec la tangente (10) et se trouve globalement dans l'élément à vis (2),
    b) le côté long (7) de la section transversale de la cale qui est dirigé vers l'arbre se trouve globalement dans l'arbre (1),
    c) le côté court (8) de la section transversale de la cale qui est situé dans le sens opposé au sens de rotation (5) de l'arbre (1) se trouve globalement dans l'arbre (1),
    d) le côté court (9) de la section transversale qui est situé dans le sens de rotation (5) de l'arbre (1) se trouve globalement dans l'élément à vis (2), et
    e) les côtés longs et courts voisins (7, 8 et 6, 9) situés dans l'arbre (1) et dans l'élément à vis (2) sont disposés globalement à angle droit les uns par rapport aux autres et forment une rainure ouverte à coins arrondis.
  2. Dispositif selon la revendication 1, caractérisé en ce que la section transversale de la cale (3) présente un rapport de côtés situé entre 1:3 et 1:6.
  3. Dispositif selon les revendications 1 et 2, caractérisé en ce qu'il est prévu deux cales identiques (3) agissant dans le même sens.
  4. Dispositif selon les revendications 1 à 3, caractérisé en ce que les cales (3) ont une configuration élastique.
  5. Dispositif selon les revendications 1 à 4, caractérisé en ce que les cales (3) sont pourvues d'entailles et/ou de rainures (11, 12, 13, 14).
  6. Dispositif selon la revendication 1, caractérisé en ce qu'il est prévu, entre le côté court (8) de la cale (3) et la paroi de rainure de l'arbre (1) opposée audit côté court (8), un élément tubulaire élastique (15).
EP93102734A 1992-02-28 1993-02-22 Dispositif pour mélanger et/ou malaxer des matériaux Expired - Lifetime EP0557919B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4206219 1992-02-28
DE4206219A DE4206219A1 (de) 1992-02-28 1992-02-28 Vorrichtung zum mischen und/oder kneten von werkstoffen
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 (fr) 1993-09-01
EP0557919B1 true EP0557919B1 (fr) 1996-06-05

Family

ID=25912314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102734A Expired - Lifetime EP0557919B1 (fr) 1992-02-28 1993-02-22 Dispositif pour mélanger et/ou malaxer des matériaux

Country Status (5)

Country Link
US (1) US5314245A (fr)
EP (1) EP0557919B1 (fr)
JP (1) JP3176747B2 (fr)
AT (1) ATE138829T1 (fr)
DE (2) DE4206219A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4421514C2 (de) * 1994-06-20 1998-08-13 Krupp Werner & Pfleiderer Gmbh Schneckenmaschine mit aufsteckbaren Schneckensatzelementen
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 (fr) * 2011-02-09 2013-03-08 Michelin Soc Tech Vis destinee a l'extrusion ou au melangeage d'elastomeres ou de produits plastiques pour la fabrication de pneumatiques
US20160061249A1 (en) * 2014-08-29 2016-03-03 Douglas H. Powell Adjustable shear key
DE102015005790A1 (de) * 2015-05-10 2016-11-10 Reifenhäuser GmbH & Co. KG Maschinenfabrik Schnecke zum Einsatz in einem Extruder, Verfahren zum Umrüsten einer Schnecke und Extruder

Family Cites Families (28)

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Publication number Priority date Publication date Assignee Title
US118474A (en) * 1871-08-29 Improvement in shaft-couplings
US248400A (en) * 1881-10-18 Self-adjusting spline or key
US732738A (en) * 1901-12-02 1903-07-07 Charles Hammen Keys and key-seats for shafting.
US1460222A (en) * 1922-05-26 1923-06-26 Int Harvester Co Machine key
FR567959A (fr) * 1922-09-08 1924-03-12 Cie Forges Et Acieries Marine Dispositif pour la fixation des volants sur leur arbre
DE423465C (de) * 1923-04-11 1926-01-04 Bbc Brown Boveri & Cie Befestigung von Turbinenscheiben auf ihrer Welle durch federnde Ringe
DE609576C (de) * 1933-09-19 1935-02-18 Protectoglass Ltd Vorrichtung zum Herstellen von splittersicherem Glas
DE813154C (de) * 1949-09-29 1951-09-06 Bayer Ag Misch- und Knetvorrichtung
US2681239A (en) * 1950-08-16 1954-06-15 James W Gillen Pressure lock key
GB868469A (en) * 1957-05-16 1961-05-17 Huntley & Palmers Ltd Improvements in continuously operable apparatus for kneading plastic masses
US2994548A (en) * 1958-04-03 1961-08-01 Donald H Mcgogy Shaft keying device
US3155056A (en) * 1959-08-26 1964-11-03 American Mach & Foundry Plastic or dough mixing apparatus
FR1345563A (fr) * 1961-12-14 1963-12-13 Perfectionnement aux clavetages tangentiels
DE1180718B (de) * 1962-04-11 1964-11-05 Bayer Ag Knetvorrichtung mit zwei oder mehr Schnecken
FR1416667A (fr) * 1963-11-15 1965-11-05 Wmb Internat Ab Procédé pour la fabrication de corps poreux en matière thermoplastique
NL131340C (fr) * 1963-11-27 1900-01-01
DE6604741U (de) * 1966-02-11 1970-02-19 Werner & Pfleiderer Schneckenmaschine
US3421783A (en) * 1967-08-30 1969-01-14 Sakai Mfg Co Ltd Shock-absorbing key for rotary body
GB1215057A (en) * 1968-05-22 1970-12-09 Laminated Plastic Products Ltd Demountable agitator
DE2329514A1 (de) * 1973-06-06 1975-01-02 Mannesmann Meer Ag Auf einem wellenzapfen drehfest aufgestecktes zahnrad grossen durchmessers
DE2617864A1 (de) * 1976-04-23 1977-11-03 Nosta Normteile Und Stahlkeile Kraftuebertragungselement
DE2750767A1 (de) * 1977-11-12 1979-05-17 Werner & Pfleiderer Knetkoerper fuer extruderschneckenmaschinen
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GB8804313D0 (en) * 1988-02-24 1988-03-23 Apv Plc Improvements in/relating to mixers
EP0422272B2 (fr) * 1989-10-12 2001-06-13 Josef A. Blach Dispositif de malaxage et pétrissage

Also Published As

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

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