EP0329092A1 - Mehrspindeliger Knetmischer - Google Patents

Mehrspindeliger Knetmischer Download PDF

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Publication number
EP0329092A1
EP0329092A1 EP89102544A EP89102544A EP0329092A1 EP 0329092 A1 EP0329092 A1 EP 0329092A1 EP 89102544 A EP89102544 A EP 89102544A EP 89102544 A EP89102544 A EP 89102544A EP 0329092 A1 EP0329092 A1 EP 0329092A1
Authority
EP
European Patent Office
Prior art keywords
kneading
elements
shaft
radial
disc
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.)
Ceased
Application number
EP89102544A
Other languages
German (de)
English (en)
French (fr)
Inventor
Heinz List
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 EP0329092A1 publication Critical patent/EP0329092A1/de
Ceased 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

Definitions

  • the invention relates to a kneading mixer for carrying out mechanical, chemical and thermal processes according to the preamble of patent claim 1.
  • a multi-spindle mixing and kneading machine one shaft of which is provided with radial disk elements and axially aligned kneading bars arranged between the disks (disk shaft), in which frame-like kneading elements arranged on a second parallel stirring shaft kneading shaft) engage clean the discs and kneading bars of the disc shaft.
  • the present invention results in a significant improvement in the micro-kneading effect and thus a substantial extension of the application.
  • FIGS. 1 and 2 The structure of the mixing kneader is shown in FIGS. 1 and 2, sections being drawn with a cut housing for better illustration of the stirrer.
  • the housing has the shape of an eight in cross section, as can be seen from FIGS. 5 to 7.
  • the housing consists of the housing parts 2 and 3, and the outlet housing 4, which are screwed together by means of flanges. It is closed at the end with the end walls 5 and 6, to which the lanterns 7 and 8 with the agitator shaft bearings 9 and 10 and 11 and 12 are connected.
  • the passage of the agitator shaft journals through the end walls is provided by means of stuffing boxes 13 of known design.
  • the kneading mixer is supported with the feet 14. 15 is a gear unit that couples the two shafts 22 and 29 to one another at the desired speed ratio.
  • the drive shaft journal 16 can in turn be driven in any way by a gear and a drive unit.
  • 17 is the feed nozzle for the product that leaves the machine at the outlet nozzle 18.
  • 19 is a nozzle for the extraction of gases and vapors, while 20 different nozzles are used for emptying the machine.
  • the first or disk shaft 22 consists of a central tube 23 with laterally attached shaft journals 24 and 25, which are supported in the bearings 10 and 12.
  • the central tube 23 carries the disk elements 26 in radial planes, which are connected to one another by the kneading bars 27 on the outer diameter. These kneading bars 27, but often also the disk elements 26, are usually arranged on screw lines for better transport of the product through the machine. If a longer residence time spectrum is required for the process, individual kneading bars can also be arranged with an incline for a return transport.
  • the kneading elements arranged on the kneading shaft 29 mesh with the kneading bars 27 of this disk shaft.
  • the kneading shaft 29 consists of a central tube 30 into which the shaft journals 31 and 32, which are supported in the bearings 9 and 11, are inserted.
  • the kneading elements 34 are arranged, each of which consists of the radial parts 35 and 36, as well as the kneading bar 37 connecting these two radial elements.
  • a level plate 21 is inserted, which regulates the filling of the machine in the manner of an overflow weir.
  • the product fed to the kneading mixer in the nozzle 17 is detected by the inclination of the kneading bars 27, 37 on the two agitator shafts and transported against the outlet housing. After overcoming the level plate 21, the product falls into the outlet housing 4 and is discharged there through the nozzle 18.
  • the mostly heated surfaces of the disc elements and the agitator shaft 23 itself are cleaned.
  • the material is primarily moved radially between two opposite disc surfaces, but a part of the product is pressed against the disc elements by displacement. This displacement of the product by kneading elements results in an excellent macromixing and kneading.
  • the actual micro-kneading to destroy the agglomerates is, however, intensified according to the invention by the special shape of the radial kneading element parts 35 and 36 on the kneading shaft.
  • these radial kneading elements 35, 36 are designed in such a way that the product is first scraped off the disks 26 with the scraping edge 41 or 45 during the course of the movement and from the deflecting surfaces 42 or 46 into the kneading gap 43 or 47 is guided and pressed.
  • very high shear forces occur in this narrowed space 43 or 47 between the kneading element and the opposite disk, which lead to excellent micro-kneading and agglomerate destruction.
  • This sequence of movements also contributes significantly to the macromixing, since the product is moved axially back and forth between the two opposite disc surfaces.
  • the course of movement itself is shown by the longitudinal section Fig. 4 and the associated cross sections 5, 6 and 7.
  • the radial kneading elements 35 and 36 show the shape of an involute, which results from the kinematic development of the movement sequence between the two agitator shafts.
  • 5, 6 and 7 represent a disc shaft on which four disc elements 26 are arranged, between which there are gaps for the transport of the product. In front of a gap, the disc elements are connected by the kneading bars 27.
  • the kneading effect can, however, be increased by providing only one gap per disc surface for the transport of the product and forming the other disc parts as a full surface. This results in a larger kneading area for the cooperation between the radial kneading arms 35, 36 and the disks 26. This leads to an intensification of the kneading effect. It is further supported by the fact that the kneaded product can dodge less.
  • the intensity of the kneading depends - as already noted in the reduction of the gaps between the disks - on the area of the disk which is coated by the kneading elements of the kneading shaft.
  • This disk area can be increased further by using radial disk elements 60 as kneading counter-elements in the gaps between the rotating kneading elements 35, 36 in the housing of the kneading shaft, as shown in FIGS. 4 to 7.
  • FIG. 9 The top view of FIG. 9 on two agitator shafts in a partially cut-open housing, the associated cross sections FIG. 10 to 12 and the development FIG.
  • the disk shaft with the associated positions of the radial kneading elements of the kneading shaft show an even more effective application of the principle of the invention.
  • 50 is the disk shaft with the disk elements 51 and the kneading bars 52 and 53.
  • 54 is the kneading shaft on which the kneading elements 55 and 56 with the axial kneading bars 57 and 58 are attached.
  • the characteristic features of this embodiment are the axial kneading bars 52, 53 on the disk shaft, and the axial kneading bars 57, 58 on the kneading shaft, each of which only extends over approximately half the distance between the disk planes.
  • the arrangement of the two radial kneading elements between the disk surfaces is bound to the relatively flat screw line of the kneading bar 27, the approximately half length of the kneading bars on both shafts enables an arrangement of the two radial kneading arms 55, 56 on the kneading shaft, in each of which there is a radial kneading gap for the free passage of the product between the discharge surface of the kneading arm and the opposite disk.
  • the radial kneading elements of the kneading shaft are offset by 180 degrees in the embodiment shown. This makes it possible to narrow or widen the radial kneading gap either by the spacing of the disk surfaces due to the axial expansion of the kneading elements, in order to optimize the kneading effect on certain products. In addition, the free space for pushing the product back and forth between two pane levels and thus also the macro mixing is improved.
  • the axial transport direction for the product can also be influenced if the length of the kneading bars is extended on one side and the opposite kneading bar is shortened accordingly.
  • the axial kneading bars 57, 58 are placed on the radial kneading elements 55, 56.
  • the mixing and kneading effect of the radial kneading elements can be improved for many products by dividing the scraping edges and the subsequent deflecting surfaces for the product in such a way that two or more product flows are created, which only come together again in the actual kneading gap and there under pressure of the shear forces are kneaded together again.
  • the arrangement of effective additional kneading gaps for better micro-kneading of the product can be varied in many ways, be it by changing the speed ratio between the two agitator shafts, by varying the disk surfaces, the number of radial kneading elements or the number of axial kneading bars.
  • the working principle can also be varied if the two agitator shafts have either counter-rotating or parallel directions of rotation.
  • All surfaces of the machine that come into contact with the product can be at least partially heated or cooled according to the known system.

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)
  • Saccharide Compounds (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
EP89102544A 1988-02-16 1989-02-15 Mehrspindeliger Knetmischer Ceased EP0329092A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH551/88 1988-02-16
CH551/88A CH680196A5 (ru) 1988-02-16 1988-02-16

Publications (1)

Publication Number Publication Date
EP0329092A1 true EP0329092A1 (de) 1989-08-23

Family

ID=4189611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89102544A Ceased EP0329092A1 (de) 1988-02-16 1989-02-15 Mehrspindeliger Knetmischer

Country Status (7)

Country Link
US (1) US4950081A (ru)
EP (1) EP0329092A1 (ru)
JP (1) JPH0252030A (ru)
CA (1) CA1299168C (ru)
CH (1) CH680196A5 (ru)
DD (1) DD283337A5 (ru)
SU (1) SU1766239A3 (ru)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426127A1 (en) * 1989-11-02 1991-05-08 Sumitomo Heavy Industries, Ltd Viscous liquid processor
EP0460466A1 (de) * 1990-06-06 1991-12-11 Bayer Ag Selbstreinigender Reaktor/Mischer mit grossem Nutzvolumen
US5156872A (en) * 1991-02-13 1992-10-20 Lee Moon H Juice extractor
EP0517068A1 (de) * 1991-06-07 1992-12-09 List Ag Mischkneter
US5230562A (en) * 1989-11-02 1993-07-27 Sumitomo Heavy Industries, Ltd. Viscous liquid processor
EP2796189B1 (de) 2013-04-26 2017-01-18 Buss-SMS-Canzler GmbH Zweiwelliger Reaktor/Mischer
US9828462B2 (en) 2013-10-08 2017-11-28 Covestro Deutschland Ag Preparation of siloxane-containing block copolycarbonates by means of reactive extrusion
WO2018114901A1 (en) 2016-12-19 2018-06-28 Covestro Deutschland Ag Production of siloxane-containing block copolycarbonates by means of compatibilizers
US10035884B2 (en) 2014-01-30 2018-07-31 Covestro Deutschland Ag Polysiloxane-polycarbonate block cocondensates with improved rheological properties
EP3581605A1 (de) 2018-06-14 2019-12-18 Covestro Deutschland AG Schmelzeumesterungsverfahren zur gleichzeitigen herstellung mindestens zweier verschiedenartiger polycarbonate in einer produktionsanlage
EP3719077A1 (de) 2019-04-02 2020-10-07 Covestro Deutschland AG Siloxan-haltige blockcopolycarbonate mit geringer domänengrösse
WO2021023690A1 (en) 2019-08-08 2021-02-11 Covestro Intellectual Property Gmbh & Co. Kg Process for the preparation of a polycarbonate
WO2023208897A1 (de) 2022-04-29 2023-11-02 Covestro Deutschland Ag Polyestercarbonat-blend und dessen herstellung über ein polyestercarbonat-präpolymer

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126425A1 (de) * 1991-08-09 1993-02-11 Bayer Ag Vollstaendig selbstreinigender reaktor/mischer mit grossem nutzvolumen
IT1270579B (it) * 1993-02-26 1997-05-06 Seko Spa Carro trincia-miscelatore-distributore per foraggi ed insilati di erba o paglia con coclee a profilo centrale perfezionato
DE4326807A1 (de) * 1993-08-10 1995-02-16 Bayer Ag Vollständig selbstreinigender Mischer
DE4339628C2 (de) * 1993-11-20 2003-04-10 Ismar Maschinen Gmbh Knetvorrichtung
EP0715881B1 (de) * 1994-12-05 1998-02-25 Bayer Ag Vollständig selbstreinigender Mischer/Reaktor
EP0715882B1 (de) * 1994-12-05 1998-02-25 Bayer Ag Selbstreinigender Reaktor/Mischer für hochviskoses und feststoffhaltiges Mischgut
CH688365A5 (de) * 1995-01-18 1997-08-29 List Ag Misch- und Knetvorrichtung.
DE19536944A1 (de) * 1995-10-04 1997-04-10 List Ag Mischkneter
JPH09136025A (ja) * 1995-11-13 1997-05-27 Sumitomo Heavy Ind Ltd 高粘度液処理装置
DE19611852A1 (de) * 1996-03-26 1997-10-02 Bayer Ag Selbstreinigender Reaktor/Mischer für hochviskose und kohäsive Mischgüter
US5873945A (en) * 1996-05-16 1999-02-23 Nortru, Inc. Method for recovering a volatile organic material consisting essentially of carbonyl compounds from solvent-in-water emulsions derived from paint overspray treatment and capture systems
US6150498A (en) * 1996-07-12 2000-11-21 The Dow Chemical Company Polymer recovery
DE19852065A1 (de) * 1998-11-11 2000-05-18 Bayer Ag Mischvorrichtung für hochviskose Podukte
US6410783B1 (en) 2000-10-19 2002-06-25 Basf Corporation Method of producing carboxylic acid salts
EP2052773B1 (de) * 2004-09-28 2012-07-18 Basf Se Mischkneter sowie Verwendung des Mischkneters zur Herstellung von Poly(meth)acrylaten
DE102004048875A1 (de) * 2004-10-07 2006-04-13 Bayer Materialscience Ag Verfahren zur Herstellung von cyclischen Ketonen
NL1034022C2 (nl) * 2007-06-22 2008-12-23 Goudsche Machf B V Inrichting voor warmtewisseling met radiaal mengen.
DE102007041857A1 (de) * 2007-09-03 2009-03-05 Wacker Chemie Ag Verfahren zur kontinuierlichen Herstellung von vernetzbaren Massen auf der Basis von Organosiliciumverbindungen
JP5905262B2 (ja) * 2009-02-05 2016-04-20 リスト ホールディング アーゲー 混合物の連続処理方法
DE102012103565A1 (de) * 2012-04-24 2013-10-24 List Holding Ag Vorrichtung zum Transport von viskosen Massen und Pasten
DE102013100182A1 (de) * 2012-09-28 2014-06-05 List Holding Ag Verfahren zur Durchführung von mechanischen, chemischen und/oder thermischen Prozessen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2012294A1 (de) * 1969-03-17 1970-10-01 Heinz List Misch und Knetmaschine
DE2123956A1 (de) * 1970-05-20 1971-12-02 List H Mehrspindeliger Misch-Kneter
US3851859A (en) * 1973-06-04 1974-12-03 J Karp Apparatus for mixing clay
CH565585A5 (en) * 1974-04-16 1975-08-29 List Heinz Multispindle mixer-kneader - with axially oscillating, rotating scraper shaft
EP0144092A2 (de) * 1983-12-05 1985-06-12 Dipl.-Ing. H. List Industrielle Verfahrenstechnik Misch- und Knetmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750163A (en) * 1954-04-06 1956-06-12 Loedige Wilhelm Mixing apparatus
DE1553134C3 (de) * 1966-12-29 1976-12-02 Metallgesellschaft Ag Schneckenfoerderer
US4733607A (en) * 1985-10-07 1988-03-29 Star Leonard J Food processing machine
DE3543745A1 (de) * 1985-12-11 1987-06-19 Bhs Bayerische Berg Doppelwellen-zwangsmischer fuer kontinuierliche und diskontinuierliche arbeitsweise
US4752139A (en) * 1986-10-14 1988-06-21 Wenger Manufacturing, Inc. Preconditioning apparatus for extruder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2012294A1 (de) * 1969-03-17 1970-10-01 Heinz List Misch und Knetmaschine
DE2123956A1 (de) * 1970-05-20 1971-12-02 List H Mehrspindeliger Misch-Kneter
US3851859A (en) * 1973-06-04 1974-12-03 J Karp Apparatus for mixing clay
CH565585A5 (en) * 1974-04-16 1975-08-29 List Heinz Multispindle mixer-kneader - with axially oscillating, rotating scraper shaft
EP0144092A2 (de) * 1983-12-05 1985-06-12 Dipl.-Ing. H. List Industrielle Verfahrenstechnik Misch- und Knetmaschine

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230562A (en) * 1989-11-02 1993-07-27 Sumitomo Heavy Industries, Ltd. Viscous liquid processor
EP0426127A1 (en) * 1989-11-02 1991-05-08 Sumitomo Heavy Industries, Ltd Viscous liquid processor
EP0460466A1 (de) * 1990-06-06 1991-12-11 Bayer Ag Selbstreinigender Reaktor/Mischer mit grossem Nutzvolumen
US5334358A (en) * 1990-06-06 1994-08-02 Bayer Aktiengesellschaft Self-cleaning reactor/mixer with large useful volume
US5156872A (en) * 1991-02-13 1992-10-20 Lee Moon H Juice extractor
EP0517068A1 (de) * 1991-06-07 1992-12-09 List Ag Mischkneter
EP2796189B1 (de) 2013-04-26 2017-01-18 Buss-SMS-Canzler GmbH Zweiwelliger Reaktor/Mischer
US9828462B2 (en) 2013-10-08 2017-11-28 Covestro Deutschland Ag Preparation of siloxane-containing block copolycarbonates by means of reactive extrusion
US10035884B2 (en) 2014-01-30 2018-07-31 Covestro Deutschland Ag Polysiloxane-polycarbonate block cocondensates with improved rheological properties
WO2018114901A1 (en) 2016-12-19 2018-06-28 Covestro Deutschland Ag Production of siloxane-containing block copolycarbonates by means of compatibilizers
US11161938B2 (en) 2016-12-19 2021-11-02 Covestro Deutschland Ag Production of siloxane-containing block copolycarbonates by means of compatibilizers
EP3581605A1 (de) 2018-06-14 2019-12-18 Covestro Deutschland AG Schmelzeumesterungsverfahren zur gleichzeitigen herstellung mindestens zweier verschiedenartiger polycarbonate in einer produktionsanlage
WO2019238419A1 (de) 2018-06-14 2019-12-19 Covestro Deutschland Ag Schmelzeumesterungsverfahren zur gleichzeitigen herstellung mindestens zweier verschiedenartiger polycarbonate in einer produktionsanlage
EP3719077A1 (de) 2019-04-02 2020-10-07 Covestro Deutschland AG Siloxan-haltige blockcopolycarbonate mit geringer domänengrösse
WO2020201178A1 (de) 2019-04-02 2020-10-08 Covestro Intellectual Property Gmbh & Co. Kg Siloxan-haltige blockcopolycarbonate mit geringer domänengrösse
US11970615B2 (en) 2019-04-02 2024-04-30 Covestro Intellectual Property Gmbh & Co. Kg Siloxane-containing block copolycarbonates having a small domain size
WO2021023690A1 (en) 2019-08-08 2021-02-11 Covestro Intellectual Property Gmbh & Co. Kg Process for the preparation of a polycarbonate
WO2023208897A1 (de) 2022-04-29 2023-11-02 Covestro Deutschland Ag Polyestercarbonat-blend und dessen herstellung über ein polyestercarbonat-präpolymer

Also Published As

Publication number Publication date
US4950081A (en) 1990-08-21
DD283337A5 (de) 1990-10-10
SU1766239A3 (ru) 1992-09-30
CA1299168C (en) 1992-04-21
CH680196A5 (ru) 1992-07-15
JPH0252030A (ja) 1990-02-21

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