EP0517068A1 - Pétrisseur de mélange - Google Patents

Pétrisseur de mélange Download PDF

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Publication number
EP0517068A1
EP0517068A1 EP92108829A EP92108829A EP0517068A1 EP 0517068 A1 EP0517068 A1 EP 0517068A1 EP 92108829 A EP92108829 A EP 92108829A EP 92108829 A EP92108829 A EP 92108829A EP 0517068 A1 EP0517068 A1 EP 0517068A1
Authority
EP
European Patent Office
Prior art keywords
shaft
cleaning
main shaft
kneading
mixing kneader
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.)
Granted
Application number
EP92108829A
Other languages
German (de)
English (en)
Other versions
EP0517068B1 (fr
Inventor
Winfried Dr. Dötsch
Walther Dr. Schwenk
Alfred Kunz
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.)
List AG
Original Assignee
List 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 List AG filed Critical List AG
Publication of EP0517068A1 publication Critical patent/EP0517068A1/fr
Application granted granted Critical
Publication of EP0517068B1 publication Critical patent/EP0517068B1/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
    • B01F27/701—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers
    • B01F27/702—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers with intermeshing paddles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/40—Mixers with shaking, oscillating, or vibrating mechanisms with an axially oscillating rotary stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/95—Heating or cooling systems using heated or cooled stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F2035/99—Heating

Definitions

  • the invention relates to a mixer kneader for carrying out mechanical, chemical and / or thermal processes with at least two axially parallel rotating shafts, disk surfaces with kneading bars arranged on their circumference at least on the shaft designated as the main shaft, which are provided by cleaning or kneading and transport elements are coated, which are arranged on the other shaft called cleaning shaft.
  • Such a multi-spindle mixing and kneading machine is known for example from CH-PS 506 322.
  • One of the shafts is provided with radial disk elements and axially aligned kneading bars arranged between the disks and is referred to as a disk shaft. Kneading elements shaped like frames reach between these disks which are arranged on the second parallel agitator shaft. These kneading elements clean the discs and kneading bars of the disc shaft.
  • the agitator shaft In order to achieve a reasonably adequate cleaning of the disk surfaces, the agitator shaft must rotate faster than the disk shaft by an intended speed ratio. This speed ratio depends primarily on the number of kneading bars on the disc elements, since the kneading elements must intervene in the spaces between the kneading bars. This results in an insufficient cleaning effect of the pane surfaces, which in turn has a negative effect on the heat transfer to the product to be treated.
  • the present invention has for its object to significantly improve the cleaning of all areas and parts within the mixing kneader and at the same time the kneading effect exerted on the product.
  • a thermal treatment of the product there is also the task that the heat exchange surface within the mixing kneader is increased and the heat transfer to the product is significantly improved.
  • the kneading bars of two adjacent disc elements on the main shaft maintain a distance from one another, through which the cleaning or kneading and transport element on the cleaning shaft.
  • a further advantage of the present invention is that the kneading bars on the disc elements also clean the cleaning shaft. For this reason, it is possible to heat the disc surfaces of the cleaning shaft in a thermal process, since the heat exchange surface of the cleaning shaft is also cleaned here, and caking is thus avoided.
  • the cleaning or kneading and transporting element on the cleaning shaft should preferably also consist of disk surfaces and kneading bars, in a preferred embodiment both corresponding elements being of identical design.
  • the formation of the disc surfaces both on the main shaft and, if desired, on the cleaning shaft depends on the wishes of the user. For example, if only a very slow product transport from a feed nozzle to an outlet nozzle is to take place, the disc surfaces can be designed as closed rings which form only a small gap between the inner wall of the housing and the disc surface periphery through which the product can flow. If, on the other hand, faster transport of the product is desired, the disk surfaces can be sawtooth-like, wing-like, propeller-like, for example, or they can have recesses or wavy bulges. Many variations are conceivable here and should be encompassed by the present inventive concept.
  • the carrier for the kneading bars on the cleaning shaft does not necessarily have to be designed as a disk surface.
  • the kneading bar and cleaning shaft could also be connected by a simple stem that can slide through the above-mentioned distance of the kneading bars of two adjacent disc elements on the main shaft.
  • disc surfaces are preferable because they contribute to increasing the heat exchange and improving the kneading effect.
  • the distance between the kneading bars of adjacent disc elements of the main shaft in turn causes the disc surfaces of the cleaning shaft or a stem mentioned above to be in gap with the disc surfaces of the main shaft. Even the disk surfaces or the trunk are preferably arranged centrally between two disk surfaces of the main shaft. It goes without saying that if the kneading bars of the main shaft and cleaning shaft are preferably identical, not only are two adjacent kneading bars of the main shaft spaced apart, but this distance is also formed by two adjacent kneading bars of the cleaning shaft, but offset, by which then the Disc surface of the main shaft strokes.
  • kneading bars are preferably of identical design, this can also apply to the disc surfaces of the main shaft and cleaning shaft, but they can also be designed differently, depending on the user's request, so that product transport through the cleaning shaft takes place differently than through the main shaft.
  • the invention leaves many possibilities open here.
  • the main shaft and cleaning shaft rotate in the same clockwise direction.
  • the disc or cleaning elements according to the invention also allow the main shaft and Cleaning wave in the counterclockwise direction. It is also possible to rotate the main shaft and cleaning shaft at the same or different speeds. When rotating, whether in the same direction or in opposite directions, at the same speed, the number of kneading bars on the main shaft should correspond to that on the cleaning shaft. This enables the most economical cleaning for this speed without interfering with the kneading bars.
  • the number of kneading bars arranged on the main shaft and on the cleaning shaft should be inversely proportional to the speed ratio. For example, if the speed ratio of the main shaft to the cleaning shaft is 1: 4, four kneading bars are arranged on the main shaft and only one kneading bar on the cleaning shaft. Eight kneading bars can also be provided on the main shaft and two kneading bars on the cleaning shaft.
  • the speed ratio is odd, for example 1: 1.25, five kneading bars are arranged on the main shaft and four kneading bars on the cleaning shaft.
  • the present mixer kneader is extremely flexible.
  • the main advantages are improved self-cleaning, a larger specific heat exchange surface, a more effective one Surface renewal with diffusion-determined evaporation processes, a more intensive mixing effect with gentle kneading and less compacting as well as a narrow residence time spectrum.
  • a mixer kneader P according to Fig. 1, a housing 1, which consists of several housing sections 1 a, 1 b and 1 c.
  • the housing sections are coupled to one another by corresponding flange connections 2.
  • a feed nozzle 3 for a product to be treated in the mixing kneader and in the housing section 1 c an outlet nozzle 4 for the treated product.
  • the product is transported from the feed nozzle 3 to the outlet nozzle 4 by means of two shafts 5 and 6 and kneading and transport elements 7 arranged thereon. During transport, the product is mixed and kneaded, and preferably a thermal treatment takes place.
  • the shafts 5 and 6 and optionally also the kneading and transport elements 7 and, not shown in more detail, the housing wall 8 are heated.
  • connections 9 and 10 are provided, these connections 9 and 10 around corresponding outlet nipples 11 and 12 for the heating medium guided through the shafts 5 and 6 are arranged. Appropriate guidance of the heating medium in the outer surfaces of the shafts 5 and 6 and a corresponding return through the outlet nipples 11 and 12 are state of the art and are therefore not described further.
  • shaft lugs 13 and 14 connected to the shafts 5 and 6 pass through a lantern 15, a stuffing box 16 and 17 being provided against the housing 1 for sealing the shafts 5 and 6, respectively.
  • the shaft journals 13 and 14 are coupled to one another outside the lantern via corresponding gear elements 17 and 18, for example toothed wheels, the gear element 17 being connected to a drive 20 via a gear 19. Via this drive 20 and the gear 19, at least the gear element 17 is rotated, which is transmitted to the shaft 5.
  • This rotary movement can be transmitted to the gear element 18 in the same or opposite directions and at the same or different speed.
  • Corresponding transmission gears are commercially available and are not to be described in more detail here.
  • shaft 5 is also referred to below as the main shaft and shaft 6 as the cleaning shaft.
  • Kneading and transport elements 7 are placed on each shaft 5 and 6, which have disc surfaces 21 as the basis for the respective shaft 5 and 6.
  • Various exemplary embodiments of disk surfaces 21 are shown in FIGS. 5 to 8. 5, disk surfaces 21a are designed as a continuous ring arranged around the respective shaft 5 or 6.
  • a sawtooth-like disk surface 21 b according to FIG. FIG. 6 shows that the disk surfaces 21 c on the cleaning shaft 6 are only designed as wings, while disk surfaces 21 d according to FIG. 8 have recesses 22 through which the product to be processed can be transported.
  • FIGS. 15 and 16 and 21 to 23 A further variant of a disk surface 21 e can be found in FIGS. 15 and 16 and 21 to 23.
  • a disk surface circumference 23 is no longer circular, but has wavy indentations 24.
  • propeller-like disk blades are also conceivable, as is shown in DE-OS 20 12 294 and CH-PS 506 322.
  • the inventive idea in the present exemplary embodiment should not be limited to the forms shown. There are a large number of further configurations of the disk surfaces 21 within the scope of the invention.
  • the kneading and transport elements 7 on the main shaft 5 as well as on the cleaning shaft 6 are identical except for the configuration of the disk surfaces 21, they should be provided with the same reference numbers below. Of course, this leaves open within the scope of the present invention that the kneading and transport elements 7 on the main shaft 5 are configured differently than those on the cleaning shaft 6.
  • an actual support leg 26 is seated on the disk surface circumference 23, while wings 27 and 28 protrude from this support leg 26 on both sides of the respective shaft 5 or 6. This then results in a kneading and transport element 7, as shown in particular in FIG. 2, which has a T-shaped configuration when viewed from above.
  • the disc surfaces 21 of the main shaft 5 and cleaning shaft 6 are arranged offset from one another.
  • This offset is preferably such that a disk surface 21 of the cleaning shaft 6 engages approximately centrally between two disk surfaces 21 of the main shaft 5.
  • this offset can also take place off-center, in which case knee spaces 29 of different widths then arise.
  • the design of identical knee spaces 29 is preferred.
  • kneading bars 25 are inclined in relation to the axial direction of the shafts 5 and 6, respectively. This improves the transport effect. Furthermore, arrows 30 and 31 indicate that the main shaft and cleaning shaft rotate in opposite directions.
  • the number of kneading bars on the disc surfaces of the cleaning shaft is usually the same as the kneading bars on the Disc areas of the main shaft in the inverse ratio of the speeds of both shafts. however, since the traces of the main shaft's kneading bars on the cleaning shaft can be identical, the number of kneading bars on the main shaft can also be reduced if desired.
  • FIGS. 9 and 10 The advantageous cleaning action of the present invention compared to, for example, CH-PS 506 322 can be clearly seen when comparing FIGS. 9 and 10.
  • Fig. 9 hatched, not cleaned surfaces 32 are still present on a disk surface 21 to a relatively large extent.
  • 10 it can be seen that there are no more contiguous, uncleaned surfaces, but that only certain areas 32 a near the main shaft 5 and certain areas 32 b around the kneading bars 25 have not been cleaned.
  • the areas which have not been cleaned are thus so minimal that the heat exchange between the disk surface 21 and the product to be treated is improved to a very outstanding extent.
  • FIGS. 11 to 16 differ from those just described in that the main shaft 5 is synchronized with the cleaning shaft 6. This is shown by the two arrows 30 a and 30 b. Furthermore, both shafts 5 and 6 run at the same speed, so that the number of kneading bars 25 arranged on the disk surfaces 21 is also the same. Only the disk surfaces 21 are on the two Shafts 5 and 6 are offset from each other or stand on a gap.
  • the wavy indentations 24 in the disc surfaces 21 e acc. 15 and 16 allow faster product transport or faster passage of gases or vapors produced.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Accessories For Mixers (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
EP92108829A 1991-06-07 1992-05-26 Pétrisseur de mélange Expired - Lifetime EP0517068B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4118884 1991-06-07
DE4118884A DE4118884A1 (de) 1991-06-07 1991-06-07 Mischkneter

Publications (2)

Publication Number Publication Date
EP0517068A1 true EP0517068A1 (fr) 1992-12-09
EP0517068B1 EP0517068B1 (fr) 1995-09-06

Family

ID=6433494

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92108829A Expired - Lifetime EP0517068B1 (fr) 1991-06-07 1992-05-26 Pétrisseur de mélange

Country Status (10)

Country Link
US (1) US5407266A (fr)
EP (1) EP0517068B1 (fr)
JP (1) JPH06233925A (fr)
AT (1) ATE127364T1 (fr)
AU (1) AU653818B2 (fr)
CA (1) CA2070539C (fr)
DE (3) DE4118884A1 (fr)
DK (1) DK0517068T3 (fr)
ES (1) ES2077918T3 (fr)
RU (1) RU2070087C1 (fr)

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0603525A1 (fr) * 1992-11-24 1994-06-29 List Ag Mélangeur-pétrisseur
DE19536944A1 (de) * 1995-10-04 1997-04-10 List Ag Mischkneter
EP0798093A2 (fr) * 1996-03-26 1997-10-01 Bayer Ag Réacteur-mélangeur autonettoyant pour des matériaux cohésifs et à haute viscosité
DE19713039A1 (de) * 1997-03-27 1998-10-01 Bayer Ag Verfahren zur Herstellung von elastomermodifizierten Thermoplasten
EP1078682A2 (fr) * 1999-08-26 2001-02-28 List Ag Mélangeur-pétrisseur
WO2002068106A1 (fr) * 2001-02-26 2002-09-06 List Ag Procede et dispositif de melange de produits
WO2003035235A1 (fr) * 2001-10-18 2003-05-01 List Ag Melangeur
DE10303167B4 (de) * 2003-01-27 2006-01-12 List Holding Ag Verfahren zur kontinuierlichen Phasenumwandlung eines Produktes
WO2006034875A1 (fr) * 2004-09-30 2006-04-06 List Holding Ag Procede de realisation continue de processus de polymerisation
WO2007112901A1 (fr) * 2006-03-31 2007-10-11 List Holding Ag Procédé et dispositif de manipulation de produits à forte viscosité
WO2007144025A1 (fr) 2006-06-15 2007-12-21 Syral Belgium Nv Procédé de préparation de polysaccharides à liaisons aléatoires
WO2008138597A1 (fr) 2007-05-14 2008-11-20 List Holding Ag Procédé et dispositif de fabrication d'une solution de filage pour la fabrication d'une fibre polymère
WO2008152024A1 (fr) 2007-06-11 2008-12-18 Basf Se Procédé destiné à éviter la surcharge d'un arbre
EP2052773A2 (fr) 2004-09-28 2009-04-29 Basf Se Malaxeur-mélangeur et procédé de fabrication de poly(méth)acrylates en utilisant le malaxeur-mélangeur
DE102009007642A1 (de) 2009-02-05 2010-08-12 List Holding Ag Verfahren zur kontinuierlichen Behandlung eines zähviskosen, pastösen Produktes
DE102009007643A1 (de) 2009-02-05 2010-08-12 List Holding Ag Verfahren zur kontinuierlichen Behandlung eines zähviskosen, pastösen Produktes
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WO2012159949A1 (fr) 2011-05-26 2012-11-29 Basf Se Procédé de production continue de particules polymères hydroabsorbantes
EP2584001A1 (fr) 2002-05-28 2013-04-24 Styrolution (Jersey) Limited Composition avec des propriétés de viscosité améliorées
US8519093B2 (en) 2009-02-05 2013-08-27 List Holding Ag Process and a device for the continuous treatment of mixed substances
WO2013167397A1 (fr) 2012-05-07 2013-11-14 Basf Se Procédé pour faire fonctionner un mélangeur-malaxeur
WO2013186176A1 (fr) 2012-06-13 2013-12-19 Basf Se Procédé de fabrication de particules de polymère absorbant l'eau dans un réacteur de polymérisation comprenant au moins deux arbres rotatifs parallèles
WO2014118024A1 (fr) 2013-01-29 2014-08-07 Basf Se Procédé de production de particules polymeres absorbant l'eau présentant une grande rapidite de gonflement et une capacite de retention apres centrifugation elevee, le lit de gel gonfle presentant simultanement une grande permeabilite
WO2014187892A1 (fr) 2013-05-24 2014-11-27 Basf Se Procédé et dispositif de surveillance de la flèche d'un arbre
US9248429B2 (en) 2012-06-13 2016-02-02 Basf Se Process for producing water-absorbing polymer particles in a polymerization reactor with at least two axially parallel rotating shafts
EP2796189B1 (fr) 2013-04-26 2017-01-18 Buss-SMS-Canzler GmbH Réacteur/mélangeur à deux arbres
DE102015114281A1 (de) 2015-08-27 2017-03-02 List Holding Ag Verfahren zur Verbesserung der Isolation von Polymerlösungen
US9657412B2 (en) 2013-10-10 2017-05-23 List Technology Ag Method for treating a mixture
US9822881B2 (en) 2012-07-11 2017-11-21 List Holding Ag Method and apparatus for handling a product
US9828462B2 (en) 2013-10-08 2017-11-28 Covestro Deutschland Ag Preparation of siloxane-containing block copolycarbonates by means of reactive extrusion
US20180016368A1 (en) * 2012-07-02 2018-01-18 Compagnie Generale Des Etablissements Michelin Process for continuous synthesis of a diene elastomer
WO2018114901A1 (fr) 2016-12-19 2018-06-28 Covestro Deutschland Ag Production de copolycarbonates séquencés contenant du siloxane au moyen d'agents de compatibilisation
US10035884B2 (en) 2014-01-30 2018-07-31 Covestro Deutschland Ag Polysiloxane-polycarbonate block cocondensates with improved rheological properties
US10442113B2 (en) 2013-03-04 2019-10-15 List Technology Ag Method and device for treating viscous, paste-like materials
EP3581605A1 (fr) 2018-06-14 2019-12-18 Covestro Deutschland AG Procédé de commande de fonte pour la production simultanée d'au moins deux polycarbonates différents dans une installation de production
EP3719077A1 (fr) 2019-04-02 2020-10-07 Covestro Deutschland AG Copolycarbonates séquencés contenant du siloxan à faible granulométrie
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ES2077918T3 (es) 1995-12-01
DK0517068T3 (da) 1995-12-11
DE4239424A1 (de) 1994-05-26
CA2070539C (fr) 2004-08-31
US5407266A (en) 1995-04-18
AU653818B2 (en) 1994-10-13
ATE127364T1 (de) 1995-09-15
CA2070539A1 (fr) 1992-12-08
DE4118884A1 (de) 1992-12-10
AU1807692A (en) 1992-12-10
RU2070087C1 (ru) 1996-12-10
EP0517068B1 (fr) 1995-09-06
JPH06233925A (ja) 1994-08-23
DE59203529D1 (de) 1995-10-12

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