US3687422A - Multiple spindle mixing device - Google Patents

Multiple spindle mixing device Download PDF

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Publication number
US3687422A
US3687422A US19694A US3687422DA US3687422A US 3687422 A US3687422 A US 3687422A US 19694 A US19694 A US 19694A US 3687422D A US3687422D A US 3687422DA US 3687422 A US3687422 A US 3687422A
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Prior art keywords
shaft member
housing
stirrer shaft
stirrer
members
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Expired - Lifetime
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US19694A
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English (en)
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Heinz List
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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
    • B01F27/60—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

  • ABSTRACT A multiple-spindle mixing kneader, especially for carrying out thermal processes in liquid, pasty and solid
  • Forelgn Apphcanon Pnomy Data phases which is of the type comprising a stationary, March 17, 1969 Switzerland ..4103/69 generally horizontally disposed housing in the form of a drum member having a substantially centrally ar- [52] U.S.Cl. ..259/104, 241/98, 15/2465 ra ged st rr r shaft member upon which there are [51] Int. Cl.
  • kneading bar members are arranged between the disc sectors or paddles, also between the [56] References Cited latter and the stirrer or agitator arms which move past the end walls of the housing, these kneader bar mem- UNITED STATES PATENTS bers wiping the inner surfaces of such housing.
  • a second stirrer shaft member is arranged Zvllhams 6 parallel to the first stirrer shaft member in a further 3423074 1/1969 g: "ESQ/104x housing disposed parallel to the first housing.
  • This 62 3 1970 V second shaft member possesses stirrer arm members 9 l er 0 66 at 2 9 104 x which, on the one hand, clean the inner surfaces of I 5 l the aforementioned further housing and, on the other 3,071,352 1/1963 McIntyre hand also clean the Shaft member and h lateral 3 5382:: 3: surfaces of the first stirrer shaft member. 3,375,985 4/1968 Dodgen et al. ..241/98 9 Claims, 10 Drawing Figures Patented Aug. 29, 1972 W HY -.
  • the present invention relates to a new and improved multiple-spindle mixing kneader, especially for carrying out thermal processes, and which is of the type embodying a stationary, generally horizontally disposed housing in the form of a drum member equipped with a first stirrer element incorporating a centrally arranged stirrer shaft member upon which are arranged paddles or disc segments.
  • the inventive mixing kneader is of the type wherein mixingor kneading bar or beam members are arranged between the disc sectors and there is provided at least one second stirrer shaft member which is disposed parallel to the first stirrer shaft member which, on the one hand, serves as a counter-mixing tool and, on the other hand, also cleans the surfaces of the first stirrer element.
  • multiple-spindle mixingand kneading machines are known in different variations.
  • the known constructions are devoid of the radial disc members or sectors with the intermediately disposed kneading bars or beams.
  • Another, more specific object of the present invention relates to an improved multiple-spindle mixing kneader which is designed to effectively self-clean the surface of the components of the equipment used during processing of the material.
  • Still another significant object of the present invention relates to an improved multiple-spindle mixing kneader which is relatively simple in construction, extremely efficient in operation, not readily subject to breakdown, and equipped with means for affording a cleaning action of the components used during the mixing operation.
  • the mixing kneader construction of the present invention effectively overcomes the heretofore mentioned drawbacks of the prior art, provides for extremely large heat transfer surfaces with especially good coefficient of heat transmission owing to the selfcleaning effect which is achieved and the pronounced movement of the material, both in liquid as well as also pasty and solid phases.
  • the principles of the invention are therefore especially suitable for carrying out thermal processes, such as for instance, vaporization, drying, crystallization, reactions, and so forth.
  • inventive multiple-spindle mixing kneader which is especially designed for carrying out thermal process in liquid, pasty and solid phases, is of the type comprising a stationary, generally horizontally disposed drum-like housing member having a centrally arranged stirrer shaft member upon which there are mounted radially extending paddles or disc sectors.
  • kneading bar members are arranged between the sectors or and the stirrer arms which move past the end walls of the housing, these kneading bar members wiping the inner surfaces of the housing.
  • a second stirrer shaft member in a second housing mounted substantially parallel to the first housing. This second stirrer shaft member is equipped with stirrer arms which, on the one hand, clean the inner surface of the second mounted housing and, on the other hand, also clean the shaft member and the lateral disc surfaces of the first stirrer shaft member.
  • FIG. 1 is a schematic front view of a mixing kneader machine
  • FIG. 2 is a cross-sectional view of the machine depicted in FIG. 1, taken along the line II-II of FIG. 3;
  • FIG. 3 is a longitudinal sectional view of the machine shown in FIG. 1, taken substantially along the line III- III of FIG. 2;
  • FIG. 4 is a cross-sectional view through a mixing kneader machine designed according to the teachings of the present invention with a substantially helical or worm-shaped arranged or wound kneading bar or beam means, and taken along the lined IV-IV of'FIG. 5;
  • FIG. 5 is a longitudinal sectional view through the equipment depicted in FIG. 4;
  • FIG. 6 is a development of the main shaft member of the equipment shown in FIGS. 4 and 5, along the outermost diameter of the disc members and kneading bar members;
  • FIG. 7 is a development of the auxiliary shaft member used in the equipment of FIGS. 4 and 5, along the outermost diameter of the stirrer element;
  • FIG. 8 is a cross-sectional view through a modified version of inventive machine with a rotating and oscillating auxiliary shaft member, the sectional view being taken substantially along the line VIII-VII of FIG. 9;
  • FIG. 9 is a longitudinal sectional view through the machine depicted in FIG. 8;
  • FIG. 10 is a fragmentary perspective view showing the teeth-like projections for the paddles or countertools of the arrangement of FIGS. 8 and 9.
  • FIG. 1 a front view of a first embodiment of inventive mixing and kneading machine having a main cylindrical housing 1 in the form of a drum member and a second or auxiliary housing 2 for the second stirrer element or arrangement to be described shortly.
  • the main housing 1' is equipped at its upper region with the filling inlet or flange 3 with which communicates a vapor withdrawal conduit or pipe member 4.
  • the lower outlet or stud 5 serves for emptying the equipment.
  • cover members 6 and 9 equipped with packing sleeves 7 and 10 for the main stirrer shaft member 25, embodying the stub shafts 25b and the intermediate drum-like shaft portion 25a and the further packing sleeves 8 and 11 for the auxiliary stirrer shaft member 30, as best seen by referring to FIG. 3.
  • the cover members 6 and 9 there are also mounted the bearings 12, 14 and 13, 15, respectively, for both material agitation or stirrer shaft members 25 and 30, respectively.
  • the entire machine is supported by means of the braces or members 16 and 17 upon the supports or columns 80 and.81, respectively.
  • the drive for both stirrer shaft members 25 and 30, in the present embodiment is undertaken by means of a suitable drive motor 18 and the pinion 19 meshing with the larger gear 20 which drives the main shaft member, and from that location via the further gear 21 which drives the second stirrer shaft member.
  • the drive arrangement may be constructed such that both shafts and rotate continuously, or that the second shaft 30 rotates intermittently, or where one shaft member rotates and reciprocates, and further the direction of rotation of the shafts may be the same or counter one another, all as will be further explained in detail hereinafter.
  • sufficiently large size access openings one of which indicated at reference character 23a of FIG. 2 is shown, and closed by the cover members 22, 23 and 24.
  • FIGS. 2 and 3 depict an embodiment of the invention in which kneading bar or beam members 29 are arranged between the paddle members 26, here shown for instance as disc sectors, and in a portion axially parallel to a surface line or generatrix of the cylindrical housing 1.-
  • the main shaft member 25 is equipped with the redially extending disc sectors 26 which may be attached to the drum-like shaft portion 25a in any convenient manner, as by welding for instance. Further, in each respective radial plane there are arranged three such disc sectors 26, so that three gaps or spaces 27 also appear. These gaps or spaces 27 permit an axial material exchange within the machine. However, at the end walls 83 of the equipment only stirrer arms 28 are arranged which are welded to the main stirrer shaft member 25 and which scrape such end walls. Further, as explained above between the disc sectors 26 there are arranged the kneading bar or beam members 29, whichalso may be connected to any suitable way with the disc sectors, as by screws or welding,
  • the second stirrer shaft member 30 possesses counter-tool elements in the form of frame members 31 consisting of two side or leg portions 32 and 33 and the kneading bar or beam member 34. These components may be also connected by welding as previously discussed.
  • the side portions 32 and 33 are constructed as scraper elements which maintain the side surfaces of the disc sectors 26 clean whereas the kneading bar members 34 wipe the inner surface of the housing 2 and the main shaft member 25. However, they also serve for mixing and kneading of the product or material undergoing processing.
  • the speed of rotation of the second stirrer shaft member 30 and the transmission ratio of the second stirrer shaft member 30 with respect to the first stirrer shaft member is chosen such that the kneading bar members always pass one another.
  • the mixing and kneading effect is thus achieved in that the kneading bar members upon meeting one another will transport material from the working compartment of the one stirrer shaft member into the working compartment of the other stirrer shaft member.
  • the stirrer shaft member can either work in counter-rotational sense or in the same rotational sense. The latter operation, however, naturally requires a somewhat difierent drive arrangement from that shown in FIG. 1, as such is quite well known in the art.
  • the drive of the second shaft member can also occur intermittently, for instance, in such a way that the second stirrer member together with the kneading bar or beam member 34 only performs one revolution when the kneading bar or beam members 29 of the first stirrer device comes into the working compartment of the second stirrer device and then is fixedly held as a scraper until the kneading beam member 29 again arrives in the working compartment of the second stirrer arrangement.
  • the large surfaces provided by the paddles or stirrer segments and the very good self-cleaning efiect render the described construction especially suitable for thermal processes such as vaporization, melting, drying, cooling, crystallization, and reactions.
  • thermal processes such as vaporization, melting, drying, cooling, crystallization, and reactions.
  • the only thing necessary to perform these various operations is heating and cooling of the surfaces in any suitable known manner.
  • the counter mixing element upon the second stirrer shaft member 30 and consisting of the scrapers 43 and 44 with the kneading bars 45, is likewise appropriately mounted at an inclination.
  • the edges of the disc sectors, such as, for instance, the paddles or disc sectors 41 and42, are arranged in offset fashion to one another.
  • FIGS. 6 and 7 refers to a machine which works according to a batchwise process, in which the product in the lower portion of the housing 1 is always fed towards the middle or central region and at the top is again transported back toward the end walls. By changing the direction of rotation the material transport occurs in the opposite direction. If the kneading bar or beam members are only rotated in one direction then the machine can easily be continuously operated in that the product is infed at one end and at the other end there is mounted the discharge stud or flange means. As a special variation of the invention for continuous operation, it is possible to also arrange several kneading beam members opposite the general transport direction in order to increase the mixing action.
  • FIGS. 8 and 9 depict a variation of the invention concepts in which the second stirrer shaft member not only rotates, but also reciprocates back and forth axially.
  • Reference numeral 90 schematically depicts a drive mechanism suitable for this purpose. In so doing, it is sufficient for an adequate mixingand cleaning eflect to equip the stirrer shaft member 50 only with the scrapers 51 and 52. Owing to the axially reciprocating or oscillating movement of the second stirrer shaft member 50 the entire working compartment between the disc members 41 and 42 equipped with the kneading bar or beam members 50, on the one hand, and also the working compartment around the second stirrer shaft member 50, on the other hand, will be wipingly contacted.
  • the scraper elements of the stirrer shaft member in the form of paddles or disc segment sectors.
  • the outer diameter of the stirrer elements upon the stirrer shaft member is maintained smaller than that of the housing member 1, as clearly shown in the drawings.
  • the working principle of the invention also is extremely suitable for comminuting the product simultaneously with a mixingand kneading operation and eventually also a thermal process, such as reactionor dissolving operations.
  • These teethlike projections 92 are spaced from one another by an amount corresponding for instance to their width as indicated by reference character 101, the poses a suitable tooth height as indicated by reference character 55.
  • a multiple-spindle mixing kneader especially for carrying out thermal processes in liquid, pasty and solid phases, comprising a stationary generally horizontally disposed housing having end walls and substantially in the form of a drum, a substantially centrally arranged stirrer shaft member, means for mounting said stirrer shaft member at said housing to extend in the axial direction of said housing, radially extending members and stirrer arm means mounted upon said stirrer shaft member, kneading bar members mounted between said radially extending members and between said radially extending members and said stirrer arm means which pass the end walls of said housing and serve to wipe the inner surface of said housing, a second housing mounted substantially parallel to the first-mentioned housing and in material flow communication with theinterior thereof, a second stirrer shaft member arranged substantially parallel to said first stirrer shaft member, said second stirrer shaft member possessing counter-tool means which clean at least a portion of the inner surface of said second housing and also said first stirrer shaft member and the lateral

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  • 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)
US19694A 1969-03-17 1970-03-16 Multiple spindle mixing device Expired - Lifetime US3687422A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH410369A CH506322A (de) 1969-03-17 1969-03-17 Mehrspindelige Misch- und Knetmaschine

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US3687422A true US3687422A (en) 1972-08-29

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US19694A Expired - Lifetime US3687422A (en) 1969-03-17 1970-03-16 Multiple spindle mixing device

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US (1) US3687422A (enrdf_load_stackoverflow)
CH (1) CH506322A (enrdf_load_stackoverflow)
DE (1) DE2012294C3 (enrdf_load_stackoverflow)
FR (1) FR2039628A5 (enrdf_load_stackoverflow)
GB (1) GB1253774A (enrdf_load_stackoverflow)
SE (1) SE370022B (enrdf_load_stackoverflow)

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DE2349106A1 (de) * 1972-10-18 1974-05-02 List Heinz Mischkneter mit gegenschaufeln
US4941130A (en) * 1988-02-16 1990-07-10 List Ag Multi-spindle kneading mixer with fixed kneading counterelements
US4950081A (en) * 1988-02-16 1990-08-21 List Ag Multi-spindle kneading mixer
US5041249A (en) * 1989-12-26 1991-08-20 Exxon Chemical Patent Inc. Process for low-temperature elastomer finishing
US5407266A (en) * 1991-06-07 1995-04-18 List Ag Mixing kneader with rotating shafts and kneading bars
US5446196A (en) * 1993-05-27 1995-08-29 Bayer Aktiengesellschaft Process for the production of isocyanates and for the continuous working-up of the residue
US5505536A (en) * 1993-08-10 1996-04-09 Bayer Aktiengesellschaft Multiple shaft mixing device providing full kinematic self-cleaning
US5609735A (en) * 1994-08-31 1997-03-11 Bayer Aktiengesellschaft Process and a device for separating a solid residue from its solution in a stirred bed of material
US5658075A (en) * 1994-12-05 1997-08-19 Bayer Aktiengesellschaft Self-cleaning reactor/mixer for highly viscous and solids-bearing materials to be mixed
US5669710A (en) * 1994-12-05 1997-09-23 Bayer Aktiengesellschaft Completely self-cleaning mixer/reactor
US5934801A (en) * 1995-01-18 1999-08-10 List Ag Mixing and kneading apparatus
AU709353B2 (en) * 1995-10-04 1999-08-26 List Ag Kneader-mixer
US5962728A (en) * 1997-10-31 1999-10-05 Arco Chemical Technology, L.P. Isocyanate residue purification
US20040023398A1 (en) * 2002-08-02 2004-02-05 Nelson James M. Continuous process for the production of combinatorial libraries of modified materials
US20040145964A1 (en) * 2001-04-25 2004-07-29 Alfred Kunz Mixer bars cleaning in a radial or axial manner
US20080080300A1 (en) * 2004-09-28 2008-04-03 Basf Aktiengesellschaft Mixing Kneader and Process for Preparing Poly(Meth)Acrylates Using the Mixing Kneader
US7632916B2 (en) 2002-08-02 2009-12-15 3M Innovative Properties Company Process to modify polymeric materials and resulting compositions
US20110211420A1 (en) * 2008-09-23 2011-09-01 List Holding Ag Devices for carrying out mechanical, chemical and/or thermal processes
JP2015515378A (ja) * 2012-04-24 2015-05-28 リスト ホールディング アーゲー 高粘度の物質及びペーストの輸送装置
US20150273731A1 (en) * 2012-09-28 2015-10-01 List Holding Ag Method and device for implementing mechanical, chemical and/or thermal processes
WO2015189864A1 (en) * 2014-06-12 2015-12-17 Hedinn Hf. Apparatus for cooking and drying organic material
EP1717223B1 (de) 2002-12-19 2016-07-20 Basf Se Verfahren zur Reinigung von Isocyanaten
US9657412B2 (en) 2013-10-10 2017-05-23 List Technology Ag Method for treating a mixture
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Cited By (38)

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DE2349106A1 (de) * 1972-10-18 1974-05-02 List Heinz Mischkneter mit gegenschaufeln
FR2203669A1 (enrdf_load_stackoverflow) * 1972-10-18 1974-05-17 List Heinz
US4941130A (en) * 1988-02-16 1990-07-10 List Ag Multi-spindle kneading mixer with fixed kneading counterelements
US4950081A (en) * 1988-02-16 1990-08-21 List Ag Multi-spindle kneading mixer
US5041249A (en) * 1989-12-26 1991-08-20 Exxon Chemical Patent Inc. Process for low-temperature elastomer finishing
US5407266A (en) * 1991-06-07 1995-04-18 List Ag Mixing kneader with rotating shafts and kneading bars
US5446196A (en) * 1993-05-27 1995-08-29 Bayer Aktiengesellschaft Process for the production of isocyanates and for the continuous working-up of the residue
US5505536A (en) * 1993-08-10 1996-04-09 Bayer Aktiengesellschaft Multiple shaft mixing device providing full kinematic self-cleaning
US5609735A (en) * 1994-08-31 1997-03-11 Bayer Aktiengesellschaft Process and a device for separating a solid residue from its solution in a stirred bed of material
CN1049156C (zh) * 1994-08-31 2000-02-09 拜尔公司 在物料搅拌床中由残余物溶液分离固体残余物的方法
US5658075A (en) * 1994-12-05 1997-08-19 Bayer Aktiengesellschaft Self-cleaning reactor/mixer for highly viscous and solids-bearing materials to be mixed
US5669710A (en) * 1994-12-05 1997-09-23 Bayer Aktiengesellschaft Completely self-cleaning mixer/reactor
US5934801A (en) * 1995-01-18 1999-08-10 List Ag Mixing and kneading apparatus
AU709353B2 (en) * 1995-10-04 1999-08-26 List Ag Kneader-mixer
US6039469A (en) * 1995-10-04 2000-03-21 List Ag Mixing kneader
RU2156646C2 (ru) * 1995-10-04 2000-09-27 Лист АГ Смесительное месильное устройство
US5962728A (en) * 1997-10-31 1999-10-05 Arco Chemical Technology, L.P. Isocyanate residue purification
US20040145964A1 (en) * 2001-04-25 2004-07-29 Alfred Kunz Mixer bars cleaning in a radial or axial manner
US7157283B2 (en) 2002-08-02 2007-01-02 3M Innovative Properties Company Continuous process for the production of combinatorial libraries of modified materials
US7632916B2 (en) 2002-08-02 2009-12-15 3M Innovative Properties Company Process to modify polymeric materials and resulting compositions
US20100048819A1 (en) * 2002-08-02 2010-02-25 3M Innovative Properties Company Process to modify polymeric materials and resulting compositions
US8101711B2 (en) 2002-08-02 2012-01-24 3M Innovative Properties Company Process to modify polymeric materials and resulting compositions
US20040023398A1 (en) * 2002-08-02 2004-02-05 Nelson James M. Continuous process for the production of combinatorial libraries of modified materials
EP1717223B1 (de) 2002-12-19 2016-07-20 Basf Se Verfahren zur Reinigung von Isocyanaten
US20080080300A1 (en) * 2004-09-28 2008-04-03 Basf Aktiengesellschaft Mixing Kneader and Process for Preparing Poly(Meth)Acrylates Using the Mixing Kneader
US8070351B2 (en) * 2004-09-28 2011-12-06 Basf Aktiengesellschaft Mixing kneader and process for preparing poly(meth)acrylates using the mixing kneader
US20110211420A1 (en) * 2008-09-23 2011-09-01 List Holding Ag Devices for carrying out mechanical, chemical and/or thermal processes
US9126158B2 (en) 2008-09-23 2015-09-08 List Holding Ag Devices for carrying out mechanical, chemical and/or thermal processes
US9675945B2 (en) 2011-02-09 2017-06-13 Clextral Device for the continuous treatment of at least one raw material, treatment installation and use of such a device
JP2015515378A (ja) * 2012-04-24 2015-05-28 リスト ホールディング アーゲー 高粘度の物質及びペーストの輸送装置
US9822881B2 (en) 2012-07-11 2017-11-21 List Holding Ag Method and apparatus for handling a product
US20150273731A1 (en) * 2012-09-28 2015-10-01 List Holding Ag Method and device for implementing mechanical, chemical and/or thermal processes
US10442113B2 (en) 2013-03-04 2019-10-15 List Technology Ag Method and device for treating viscous, paste-like materials
US9657412B2 (en) 2013-10-10 2017-05-23 List Technology Ag Method for treating a mixture
WO2015189864A1 (en) * 2014-06-12 2015-12-17 Hedinn Hf. Apparatus for cooking and drying organic material
US10527349B2 (en) 2014-06-12 2020-01-07 Hedinn Hf Apparatus for cooking and drying organic material
US10822550B2 (en) 2014-11-17 2020-11-03 List Technology Ag Method of processing and/or recovering and/or reutilizing residues, especially from refinery processes
US11015867B2 (en) * 2016-11-02 2021-05-25 Hedinn Hf. Combined cooker and dryer device

Also Published As

Publication number Publication date
DE2012294B2 (de) 1972-11-16
SE370022B (enrdf_load_stackoverflow) 1974-09-30
DE2012294C3 (de) 1973-06-20
FR2039628A5 (enrdf_load_stackoverflow) 1971-01-15
CH506322A (de) 1971-04-30
GB1253774A (en) 1971-11-17
DE2012294A1 (de) 1970-10-01

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