EP0220575B1 - Dispositif à mélanger et à pétrir - Google Patents

Dispositif à mélanger et à pétrir Download PDF

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Publication number
EP0220575B1
EP0220575B1 EP86114051A EP86114051A EP0220575B1 EP 0220575 B1 EP0220575 B1 EP 0220575B1 EP 86114051 A EP86114051 A EP 86114051A EP 86114051 A EP86114051 A EP 86114051A EP 0220575 B1 EP0220575 B1 EP 0220575B1
Authority
EP
European Patent Office
Prior art keywords
mixing
housing
kneading
mixer
kneading shaft
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
EP86114051A
Other languages
German (de)
English (en)
Other versions
EP0220575A3 (en
EP0220575A2 (fr
Inventor
Siegfried Baumgärtner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Krauss Maffei AG filed Critical Krauss Maffei AG
Priority to AT86114051T priority Critical patent/ATE83946T1/de
Publication of EP0220575A2 publication Critical patent/EP0220575A2/fr
Publication of EP0220575A3 publication Critical patent/EP0220575A3/de
Application granted granted Critical
Publication of EP0220575B1 publication Critical patent/EP0220575B1/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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B01F27/707—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms the paddles co-operating, e.g. intermeshing, with elements on the receptacle wall

Definitions

  • the invention relates to a mixing and kneading device of the type specified in the preamble of claim 1.
  • a mixing and kneading device of this type is known from DE-C-23 49 106.
  • the fixed counter-elements projecting between adjacent disc elements in the torus space delimited by these, the shaft and the housing each consist of a short radial fastening arm, a kneading arm running parallel to the housing wall, a radial scraper for cleaning the disc elements and an axially extending scraper for Clean the shaft, the kneading arm and the axial and radial scrapers together forming a rectangular hook or frame.
  • the counter elements designed in this way have a good kneading and mixing action in the edge zones of the toroidal area, i.e.
  • Dead zones can therefore form here, in which the product is not mixed sufficiently, which can lead to insufficient product homogeneity.
  • Product residues can also remain in the dead spaces in the interior of the torus space which are not discharged when the batch is changed, so that undesired product mixtures between fresh and finished product can occur.
  • the invention has for its object to design a mixing and kneading device of the type mentioned so that intensive mixing in the entire product or reaction space of the various product components and an even dwell time of all product particles located in the reaction space is achieved.
  • the object is achieved by the features of claim 1.
  • the subclaims indicate advantageous further refinements.
  • the arrangement according to the invention of the mixer arms running diagonally through the torus space and close to the center thereof avoids dead zones or non-agitated product spaces also in the core area of the torus space.
  • the arrangement of the ploughshare-like deflection surfaces also ensures that circumferential product masses in the central region of the toroidal space are constantly shifted both radially and axially and fed to the heatable and coolable surfaces of the housing, the kneader shaft and / or the disk elements.
  • the conveying components can be changed as desired, for example, a greater slope can be provided in areas of the kneader shaft in order to ensure sufficient conveying components in radial and axial direction.
  • the deflecting surfaces of the cross-sectional profiles of two mirror arms arranged diagonally offset in mirror image are designed such that both deflecting surfaces result in deflection components of the product flow in the same axial direction and in the opposite radial direction .
  • additional mixing arms fastened to the kneader shaft protrude into the radially inner product space and provide additional shifting and mixing in this area.
  • the additional mixing arm has the diagonal mixer arms in parallel in a shear gap associated shear edges, through which the product experiences intensive shearing and crushing.
  • the additional mixer arm can only carry one shear edge or two shear edges which are alternately guided past the mixer arms which are diagonally offset in mirror image.
  • an L-shaped scraper is arranged on the mixer arm fixed to the housing, from which one leg scrapes the disk element and the other leg scrapes the kneader shaft.
  • stirrers are arranged at the ends of the scraper bars, which at the same time also contribute to the mixing of the radially outer product space.
  • the stirrers with the vertical part of the mixer arm also intensively stir the amount of product in this area.
  • FIG. 1 shows a mixing and kneading device with a kneader shaft 2 arranged coaxially in a cylindrical housing 1, each of which is mounted in an end wall 3 and 4 that closes the housing.
  • the kneader shaft 2 passes through the end wall 4 and is coupled to a drive unit 5.
  • the cylindrical housing 1 is shown broken away in a central partial region, in which the kneader shaft 2 and further functional elements can be seen, which can be seen more clearly from FIGS. 2 to 4 explained below.
  • the housing 1 shows the housing 1 with a kneader shaft 2 mounted therein, on which disk elements 8 are arranged in planes perpendicular to the housing or kneader shaft axis, which include a gap up to the inner wall of the housing.
  • the disk elements 8 have an area corresponding to a sector of 60 °, wherein in each case three disk elements 8 are arranged offset by 120 °.
  • these carry transverse scraper bars 10, which enclose a scraping gap with the housing inner wall and can be arranged at an angle to an axial surface line of the housing.
  • the scraper bars 10 have stirrers 11 directed radially inwards at their ends.
  • a mixer arm 12 is fastened in the middle of the housing wall between two levels of disk elements 8, which is directed radially inward in a first section 12a and then bends at an angle of 45 ° to the disk element 8 on the left in FIG. 2.
  • Another mixer arm 12 'shown in broken lines in FIG. 2 is bent toward the right-hand disk element 8 and represents the mixer arm following in the circumferential direction, which is pivoted into the image plane of FIG. 2 for the purpose of illustration.
  • two mixer arms with alternating bending directions are arranged, offset in the circumferential direction by 180 ° in each case.
  • the mixer arms 12, 12 'carry L-shaped scrapers 13, 13' At their ends, the mixer arms 12, 12 'carry L-shaped scrapers 13, 13', one leg of which is assigned to the surface of the disk elements 8 and the other leg to the surface of the kneader shaft 2.
  • the angled mixer arms 12, 12 ' divide the torus space enclosed by the inner surface of the housing 1, the kneader shaft 2 and the axially adjacent disc elements 8 into a radially outer product space P 1, P 1' and a radially inner product space P 2, P 2 '.
  • Attached to the kneader shaft 2 in the plane between two axially adjacent disc elements 8 are a plurality, preferably two, of mixer arms 14 provided as additional mixer arms, which have the mixer arms 12, 12 'projecting diagonally into the toroidal space and having shear edges 15, 15' assigned in parallel at a shear gap .
  • FIG. 4 shows the cross-sectional areas of a mixer arm 12 and a shear edge 15, against which a product stream flowing in the circumferential direction flows, which is divided by a cutting edge 16 arranged on the mixer arm 12 and deflected in a subsequent deflection surface 17.
  • the product stream flowing past on the other side of the cutting edge is detected by the shear edge 15 and subjected to an intensive squeezing and shearing action as it moves past (arrow 18) the static mixer arm 12.
  • a deflection can additionally be achieved by forming a deflecting surface 15a.
  • the flow effects caused by the mixer arm 12, 12 'can thus be influenced in any way.
  • the cutting edge 16 runs in a straight line on the mixer arm 12 shown in solid lines in FIG. 2, the deflection surface 17 being in the radially outer region, as a result of which the product stream impinging on this mixer arm 12 is deflected with a radially outwardly directed conveying component R 1 and with an axially to the left directed conveying component A1 experiences.
  • the cutting edge 16' runs in a twisted shape, the deflecting surface 17 'lying in the radially inner region, as a result of which the product stream impinging on this mixer arm 12' deflects with a radially inwardly directed conveying component R2 and experienced with the axially left-hand conveying component A2.
  • the cutting edge 16 ' can also be twisted with the deflecting surface 17' in such a way that the product stream impinging on the mixing arm is deflected radially outwards and axially to the right with one part and radially inwards and axially to the left with the other part. Due to the fact that such a mixer arm divides the product flow into partial flows with oppositely directed axial conveying components, there is no uniform axial conveying component defined in an axial discharge direction, so that a mixing arm with an S-shape twisted cutting edge and deflection surface is mainly used for the purpose of intensive mixing. It is advantageous if mixer arms with differently directed deflection surfaces follow one another in the circumferential direction.
  • the mixing and kneading devices shown are particularly suitable for continuous operation, since the axial components A 1 and A 2 acting in the same direction inform the product of an axial conveying component over the entire product space, but it is also ensured that the product mass is detected from all areas , layered and fed to the heatable or coolable surfaces of the housing, the kneader shaft and the disk elements in a constant flow.
  • the mixing and kneading device according to the invention can also be used equally for batch operation if, for. B. only mixer arms 12 can be arranged, as shown in Fig. 2 in solid lines. So product masses from the middle torus area are constantly detected and transported with radial component R1 to the heatable wall of the housing and conveyed with axial component A1 to the end wall 3 of the mixing and kneading device.
  • the product stream hits the end wall, it rolls over and flows back in the radially inner product area P2, P2 'assigned to the kneader shaft, the product stream being further intensively mixed by the action of the mixer arms 14 designed as additional mixer arms and the scraper 13.
  • the product is advantageously emptied via an outlet connection (not shown) located in the radially inner region of the end wall 4.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Claims (10)

  1. Dispositif à mélanger et à pétrir pour le traitement mécanique, chimique et/ou thermique de matériaux pouvant présenter une consistance fluide, pâteuse, granulaire ou pulvérulente, comprenant un boîtier cylindrique (1), un arbre de pétrissage (2) monté et pouvant être entraîné en rotation dans ledit boîtier, et des éléments discoïdaux (8) qui sont implantés rigidement sur l'arbre de pétrissage, avec espacements axiaux, sont dirigés transversalement par rapport à l'axe de l'arbre de pétrissage, et portent des barrettes racleuses (10) agencées pour l'essentiel transversalement par rapport au plan des disques et opposées, avec faible espacement, à la paroi interne du boîtier, un compartiment torique, formé entre deux éléments discoïdaux respectifs, étant délimité par ces derniers, par la paroi interne du boîtier et par l'arbre de pétrissage, le dispositif présentant des éléments complémentaires fixes respectivement intercalés entre les éléments discoïdaux, et dont chacun comporte un bras mélangeur (12, 12' ; 22, 22') fixé à la paroi du boîtier et s'engageant dans le compartiment torique, ainsi qu'un racleur (13, 13', 23, 23') configuré en L, supporté par ledit bras et affecté à l'arbre de pétrissage (2) et aux éléments discoïdaux (8),
    caractérisé par le fait que le bras mélangeur (12, 12' ; 22, 22') s'étend approximativement dans le sens diagonal à travers le compartiment torique, et passe alors au moins à proximité des centres axial et radial de la section transversale dudit compartiment torique ;
    et par le fait que le bras mélangeur (12, 12' ; 22, 22') possède une configuration de section transversale du type soc de charrue, avec une arête de coupe (16, 16') dirigée à l'opposé du sens de rotation de l'arbre de pétrissage (2), et une surface déflectrice (17, 17'), qui est attenante à ladite arête et est agencée avec inclinaison par rapport au sens périphérique concentrique à l'axe de l'arbre de pétrissage, en vue d'exercer, sur le produit situé au centre du compartiment torique, un effet de convoyage dirigé axialement et/ou radialement.
  2. Dispositif à mélanger et à pétrir, selon la revendication 1, caractérisé par le fait que le bras mélangeur (12, 12' ; 14) subdivise la section transversale du compartiment torique en une chambre extérieure de production P₁, P1' affectée à la paroi du boîtier, et en une chambre intérieure de production P₂, P2' affectée à l'arbre de pétrissage (2), l'effet de convoyage, exercé par la surface déflectrice (17, 17'), étant dirigé axialement et radialement par rapport à la chambre intérieure ou extérieure de production.
  3. Dispositif à mélanger et à pétrir, selon l'une des revendications 1 ou 2, caractérisé par le fait que l'arête de coupe (16, 16') et la surface déflectrice (17, 17') du profil de section transversale sont déjetées le long de l'étendue du bras mélangeur (12, 12' ; 14).
  4. Dispositif à mélanger et à pétrir, selon l'une des revendications 1 à 3, caractérisé par le fait que, dans le cas de l'implantation de plusieurs bras mélangeurs (12, 12' ; 14) s'engageant dans un compartiment torique, la direction diagonale de ces derniers alterne spéculairement par rapport à un axe radial (R-R).
  5. Dispositif à mélanger et à pétrir, selon l'une des revendications 1 à 4, caractérisé par le fait que les surfaces déflectrices (17, 17') de deux bras mélangeurs (12, 12' ; 14) respectivement successifs sont configurées de telle sorte que les deux surfaces déflectrices (17, 17') provoquent une déviation du flux de produit dans la même direction axiale (A₁, A₂), et dans des directions radiales (R₁, R₂) orientées à l'opposé.
  6. Dispositif à mélanger et à pétrir, selon l'une des revendications 1 à 5, caractérisé par le fait que des bras mélangeurs (12, 12', 14), respectivement fixés au boîtier (1) ou à l'arbre de pétrissage (2), présentent des surfaces déflectrices agencées dans des directions radiales orientées à l'opposé et dans une même direction axiale.
  7. Dispositif à mélanger et à pétrir, selon l'une des revendications 1 à 6, caractérisé par le fait que des arêtes d'écrasement ou de cisaillement (15, 15') d'un ou plusieurs bras mélangeurs (14), prévus en tant que bras mélangeurs additionnels et fixés à l'arbre de pétrissage (2), sont affectées aux bras mélangeurs (12, 12') fixés au boîtier (1), en vue de former un intervalle de cisaillement parallèle.
  8. Dispositif à mélanger et à pétrir, selon l'une des revendications 1 à 7, caractérisé par le fait qu'un racleur (13, 13'), configuré en L, est implanté sur le bras mélangeur (12, 12'), racleur dont l'une des branches est affectée à la surface d'un élément discoïdal (8), et l'autre branche est affectée à la surface de l'arbre de pétrissage (2).
  9. Dispositif à mélanger et à pétrir, selon l'une des revendications 1 à 8, caractérisé par le fait que les barrettes racleuses (10) fixées sur les éléments discoïdaux (8) portent, aux deux extrémités, des agitateurs (11) qui sont dirigés radialement vers l'intérieur dans la chambre de production P₁, P1' et sont affectés, en tant que racleurs, aux régions des bras mélangeurs (12, 12') qui sont orientées radialement.
  10. Dispositif à mélanger et à pétrir, selon l'une des revendications 1 à 9, caractérisé par le fait que les barrettes racleuses (10) sont agencées, d'une manière connue par elle-même, avec inclinaison par rapport à la génératrice axiale du boîtier (1).
EP86114051A 1985-10-25 1986-10-10 Dispositif à mélanger et à pétrir Expired - Lifetime EP0220575B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86114051T ATE83946T1 (de) 1985-10-25 1986-10-10 Misch- und knetvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3538070 1985-10-25
DE19853538070 DE3538070A1 (de) 1985-10-25 1985-10-25 Misch- und knetvorrichtung

Publications (3)

Publication Number Publication Date
EP0220575A2 EP0220575A2 (fr) 1987-05-06
EP0220575A3 EP0220575A3 (en) 1989-03-29
EP0220575B1 true EP0220575B1 (fr) 1992-12-30

Family

ID=6284492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114051A Expired - Lifetime EP0220575B1 (fr) 1985-10-25 1986-10-10 Dispositif à mélanger et à pétrir

Country Status (5)

Country Link
US (1) US4775243A (fr)
EP (1) EP0220575B1 (fr)
JP (1) JPH0649142B2 (fr)
AT (1) ATE83946T1 (fr)
DE (1) DE3538070A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988003053A1 (fr) * 1986-10-22 1988-05-05 Heinz Nienhaus Sechoir malaxeur
EP0304925A1 (fr) * 1987-08-28 1989-03-01 List AG Malaxeur comportant des fourches de malaxage
EP0320586A1 (fr) * 1987-12-18 1989-06-21 Zimmer Aktiengesellschaft Appareil pour traiter des substances à forte viscosité
EP0329091A1 (fr) * 1988-02-16 1989-08-23 List AG Mélangeur-pétrin à plusieurs arbres
EP0761295A1 (fr) * 1995-09-12 1997-03-12 List Ag Mélangeur-pétrisseur
US5934801A (en) * 1995-01-18 1999-08-10 List Ag Mixing and kneading apparatus

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH672749A5 (fr) * 1986-12-19 1989-12-29 List Ag
CH679290A5 (fr) * 1989-10-04 1992-01-31 List Ag
CH686406A5 (de) * 1990-04-11 1996-03-29 List Ag Kontinuierlich arbeitender Mischkneter.
DE4102177A1 (de) * 1991-01-25 1992-07-30 Krauss Maffei Ag Misch- und reaktionsvorrichtung
DE19536944A1 (de) * 1995-10-04 1997-04-10 List Ag Mischkneter
US5735603A (en) * 1996-05-03 1998-04-07 Littleford Day, Inc. Horizontal mixer apparatus and method with improved shaft and seal structure
CN1241679C (zh) * 2001-04-25 2006-02-15 利斯特股份公司 混合机径向或轴向自洁杆件
US8925906B2 (en) * 2010-06-17 2015-01-06 Aisin Seiki Kabushiki Kaisha Device for diluting a viscous substance
KR102408877B1 (ko) 2014-08-13 2022-06-13 베르살리스 에스.피.에이. 회전자 및 교반 디바이스

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DE2349106A1 (de) 1972-10-18 1974-05-02 List Heinz Mischkneter mit gegenschaufeln
CH661450A5 (en) 1984-04-30 1987-07-31 List Ind Verfahrenstech Kneader mixer having counter-elements

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Patent Citations (3)

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DE2349106A1 (de) 1972-10-18 1974-05-02 List Heinz Mischkneter mit gegenschaufeln
AT334328B (de) 1972-10-18 1976-01-10 List Heinz Mischkneter mit gegenschaufeln
CH661450A5 (en) 1984-04-30 1987-07-31 List Ind Verfahrenstech Kneader mixer having counter-elements

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UNTERLAGEN ASSORENI

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988003053A1 (fr) * 1986-10-22 1988-05-05 Heinz Nienhaus Sechoir malaxeur
EP0304925A1 (fr) * 1987-08-28 1989-03-01 List AG Malaxeur comportant des fourches de malaxage
EP0320586A1 (fr) * 1987-12-18 1989-06-21 Zimmer Aktiengesellschaft Appareil pour traiter des substances à forte viscosité
EP0329091A1 (fr) * 1988-02-16 1989-08-23 List AG Mélangeur-pétrin à plusieurs arbres
US5934801A (en) * 1995-01-18 1999-08-10 List Ag Mixing and kneading apparatus
EP0761295A1 (fr) * 1995-09-12 1997-03-12 List Ag Mélangeur-pétrisseur

Also Published As

Publication number Publication date
JPH0649142B2 (ja) 1994-06-29
DE3538070A1 (de) 1987-04-30
EP0220575A3 (en) 1989-03-29
ATE83946T1 (de) 1993-01-15
JPS62102823A (ja) 1987-05-13
US4775243A (en) 1988-10-04
EP0220575A2 (fr) 1987-05-06
DE3538070C2 (fr) 1991-03-07

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