EP0422454B1 - Mischkneter - Google Patents

Mischkneter Download PDF

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Publication number
EP0422454B1
EP0422454B1 EP90118626A EP90118626A EP0422454B1 EP 0422454 B1 EP0422454 B1 EP 0422454B1 EP 90118626 A EP90118626 A EP 90118626A EP 90118626 A EP90118626 A EP 90118626A EP 0422454 B1 EP0422454 B1 EP 0422454B1
Authority
EP
European Patent Office
Prior art keywords
shaft
kneading
arm
rotation
leg
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
EP90118626A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0422454A1 (de
Inventor
Alfred Kuenz
Walter Dr. Schwenk
Jörg 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
Priority to AT90118626T priority Critical patent/ATE82872T1/de
Publication of EP0422454A1 publication Critical patent/EP0422454A1/de
Application granted granted Critical
Publication of EP0422454B1 publication Critical patent/EP0422454B1/de
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 mixer kneader for mechanical and / or thermal treatment of products in a liquid, pasty and / or powdery state.
  • Such a mixer kneader is known for example from DE-C 23 49 106.
  • the fixed kneading counter element essentially also consists of a hook that cleans both the disk segments and the shaft.
  • the arm cleaning the shaft is directed against the direction of rotation of the shaft. This has the disadvantage that this part of the hook, which is furthest from the attachment point, is exposed to considerable forces which, for example, can be caused by very hard incrustation of the product on the shaft.
  • this arm near the shaft cuts into the incrustation of the product and can be torn off when the shaft is turned further.
  • a kneading gap is formed between the arm near the shaft and the leg near the housing, through which the product is pressed. Since both the arm near the shaft and the leg near the housing are static parts, a product bridge can easily form between them, which can grow up to the opposite kneading element and thus build up a product torus. This then significantly worsens the kneading effect.
  • the kneading counter elements according to DE-PS 23 49 106 are subjected to significant forces, they are preferably cast. This is especially true for the reasons of their design, which is quite complicated. A dough hook cast in this way is relatively expensive.
  • a kneading element is also known from CH-A 661 450, which likewise consists of a leg near the inner wall of the housing, a section near the disk segment and an arm near the shaft. The leg is inclined against the direction of rotation of the shaft, while the section runs secant to the shaft in the direction of rotation. This is followed by the arm that runs close to the shaft and runs parallel.
  • a disadvantage of this shape has been found, above all, that a cross-sectional constriction between the leg or the support and the arm, which is located directly radially opposite and close to the shaft results for the product to be processed, which must be pressed through this narrowed "opening hole".
  • the inventor has set itself the goal of developing a mixer kneader of the type mentioned above, in which the kneading counter elements are inexpensive to manufacture and easier to shape. Furthermore, they should be exposed to lower mechanical forces and in particular reduce the torque absorption of the shaft and avoid torus biling.
  • a mixer kneader according to claim 1 leads to the solution of this problem.
  • the arm near the shaft is spatially removed from the leg and the support, so that it is no longer radially opposite and does not form a cross-sectional constriction for the product.
  • the risk of excessive stress on the kneading element is avoided.
  • the arm and its center line also run in a helical line inclined in the direction of rotation of the shaft. This also means that the arm does not oppose excessive incrustation of the product, on the contrary, an elastic yielding of the arm and also of the section near the disc segment is facilitated.
  • leg and its center line also preferably, in turn, extend helically in the direction of rotation at an angle to an imaginary line arranged parallel to the surface of the housing. This means that the inclination of the leg and the adjoining section of the arm near the shaft near the segment of the shaft already brings it out of the radial plane between the inner wall of the housing and the shaft.
  • An important advantage of the present invention is that a kneading area is formed between the leg and the shaft, which is formed on the one hand by the static leg and on the other hand by the rotating shaft.
  • the product does not have to pass through a kneading area between two static ones Parts of the device so that no product torus can build up here.
  • the shaft pushes the product through the kneading area without the shaft having to absorb more force.
  • the area then following the kneading area between the static leg near the inner wall of the housing and the arm near the shaft has a larger opening area, so that the product previously deformed in the kneading area passes through this area without difficulty.
  • the axis of the support should be approximately radial to the axis of rotation of the shaft.
  • This support serves to hold the entire hook and forms a kneading gap together with the leg and a part of the housing inner wall assigned to the leg. A part of a kneading ingot which is arranged on the disk segments of the shaft can then pass through this kneading gap.
  • the kneading counter-element according to the invention has a significantly improved mixing action and product promotion, its production being easier and cheaper.
  • the torque consumption is significantly reduced.
  • the hook of the kneading counter element is produced in one piece from a band-shaped metal strip as a sheet metal hook.
  • this sheet metal hook has sufficient rigidity by appropriate choice of its thickness in relation to its width or length that does not affect the elasticity of the hook. After the hook has been bent, bent or cranked, it is then sufficient if the edge is ground or chamfered accordingly, so that a scraping edge is created, for example, for the shaft surface on the arm and the disk segment surface on the section.
  • connection between the leg and the support can also be facilitated in that a cone is placed on the end face of the support and engages in a corresponding opening in the leg. There it is then fixed by welding.
  • a mixing kneader R has a housing 1. This housing 1 is surrounded by a heating jacket 2 or by heating channels. There are one or more nozzles 3 on top of the housing 1 for filling in a starting product and for removing vapors. The finished product is discharged at a lower outlet nozzle 4. Feet 5 serve to support the mixing kneader R.
  • An end wall 6 is equipped with a stuffing box 7 and connected to a lantern 8 for supporting a bearing 9 for an agitator shaft 10.
  • a lantern 12 also surrounding a corresponding gland, not shown, and a bearing 13 connected to this lantern 12.
  • the opposite agitator shaft pin 14 still looks out of this bearing 13.
  • the agitator shaft pin 10 extends through the rest of the bearing 9 and is then connected to a slip-on gear 15, via which the agitator shaft pin 10 and 14 and thus a shaft 16 are rotated about the axis A.
  • the drive takes place via a drive motor, not shown, which rotates a V-belt wheel 17.
  • the shaft 16 is normally heatable and coolable, the supply of the corresponding heating or cooling medium through a connector 18 and the return through an additional connector 19.
  • Kneading elements 20 which essentially consist of disk segments 21 and attached kneading bars 22, sit on the shaft 16.
  • the disk segments 21 rotate with the shaft 16, the kneading bars 22 brushing past the inner housing jacket 23 at a short distance.
  • these kneading bars 22 clean the inner casing of any product incrustations that may be present.
  • Adjacent disk segments 21 form a kneading space 24 between them. Furthermore, adjacent kneading bars 22 leave a gap 25 between them, through which a support 26 of a kneading counter element 27 can slide in the use position.
  • This kneading counter element 27 is essentially designed as a kneading hook, with an axially parallel leg 28 adjoining the support 26 running radially to the shaft 16.
  • This axially parallel leg 28, which, however, can run parallel to the inner surface of the housing in a helically inclined manner, forms, together with the respective part of the kneading bar 22, a kneading gap 29 through which the kneading bar 22 must move.
  • the product to be processed is also pressed through, sheared and kneaded between the leg 28 and the inner housing jacket 23.
  • This radial section 30 has the task of freeing the disk segments 21 from product incrustations. At the same time, of course, the product is also sheared between the radial section and the disk segment, so that the kneading effect is also improved thereby.
  • an arm 31 assigned to the shaft 16 is then molded onto the radial section 30, which arm is preferably adapted in part to the outer surface of the shaft 16 and slides past this outer surface.
  • This arm 31 has the primary task of cleaning the outer surface of the shaft 16.
  • Kneading counter-elements 27 are shown in FIG. 1, each of which only comes close to the disk segments 21 on one side. Similar kneading counter elements, which is not shown in detail, can be provided opposite in the housing 1, these kneading counter elements then stripping off the other surface of the disk segments 21 with a corresponding radial section as they slide past and also scraping off the outer surface of the shaft which has not been cleaned by the arm 31 .
  • the arrangement or configuration of the kneading counter element 27 can be seen better in FIGS. 2, 3 and 4.
  • the support 26 sits in the housing 1 such that its axis B runs radially to the axis of rotation A.
  • This support 26 then has a cone 33 on its end face 32, to which a hook 34 made of a band-shaped material connects.
  • This hook 34 comprises the axially parallel leg 28, the radial section 30 and the arm 31.
  • the cone 33 is inserted in the axially parallel leg 28 and is connected to the support 26 via two weld seams 35 and 36.
  • the shape of the hook 34 is essential. Firstly, the leg 28, which together with the kneading bar 22 forms the kneading gap 29, is inclined by an angle w to a line C running parallel to the axis of rotation A. This is shown in FIG. 4 by the course shown a center line M of the leg 28 to this line C clearly.
  • the radial section 30 adjoining the leg 28 likewise has a center line N, which forms an angle v with an imaginary line running parallel to the axis B (see FIG. 3).
  • This center line N is inclined in the direction of rotation Z of the shaft 16.
  • the arm 31 has a curved center line O, the curvature of which is approximately adapted to the lateral surface 37 of the shaft 16. At the same time, this center line O does not run parallel to the axis of rotation A or the line C shown in FIG. 4, but also here at an angle z. The arm 31 thus follows the direction of rotation Z of the shaft 16.
  • the operation of this kneading counter element 27 according to the invention is as follows: If the shaft 16 rotates in the direction of rotation Z, the product reaches not only the kneading gap 29 but also the kneading area K between the static support 26 or the leg 28 and the moving shaft 16.
  • the rotating shaft 16 presses the product against the latter static part of the kneading counter element, whereby the leg 28 of the kneading counter element 27 is only slightly stressed.
  • the shaft 16 is also subject to less stress, so that the force absorption of the shaft can be reduced.

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)
EP90118626A 1989-10-04 1990-09-28 Mischkneter Expired - Lifetime EP0422454B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90118626T ATE82872T1 (de) 1989-10-04 1990-09-28 Mischkneter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3619/89A CH679290A5 (US08063081-20111122-C00044.png) 1989-10-04 1989-10-04
CH3619/89 1989-10-04

Publications (2)

Publication Number Publication Date
EP0422454A1 EP0422454A1 (de) 1991-04-17
EP0422454B1 true EP0422454B1 (de) 1992-12-02

Family

ID=4259873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90118626A Expired - Lifetime EP0422454B1 (de) 1989-10-04 1990-09-28 Mischkneter

Country Status (7)

Country Link
US (1) US5121992A (US08063081-20111122-C00044.png)
EP (1) EP0422454B1 (US08063081-20111122-C00044.png)
AT (1) ATE82872T1 (US08063081-20111122-C00044.png)
CA (1) CA2026845C (US08063081-20111122-C00044.png)
CH (1) CH679290A5 (US08063081-20111122-C00044.png)
DE (1) DE59000547D1 (US08063081-20111122-C00044.png)
ES (1) ES2036878T3 (US08063081-20111122-C00044.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9394626B2 (en) 2009-08-11 2016-07-19 List Holding Ag Method for treating a monomer, pre-polymer, polymer or a corresponding mixture

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1008407A6 (nl) * 1993-02-12 1996-05-07 Mach Collette S A Nv Mengtoestel voor het beluchten en mengen van verpompbare, half-vloeibare produkten.
GB2275930B (en) * 1993-03-10 1995-10-25 Coates Brothers Plc Dispersion
US5332313A (en) * 1993-03-12 1994-07-26 Dow Corning Corporation Nozzle mixer assembly
IL113562A (en) * 1995-05-01 1999-08-17 Bromine Compounds Ltd Process for the production of finely granulated solid chemical compounds
NL1000276C2 (nl) * 1995-05-02 1996-11-05 Akzo Nobel Nv Werkwijze ter vervaardiging van vezels uit poly(p-fenyleen- tereftaalamide).
DE19533693A1 (de) * 1995-09-12 1997-03-13 List Ag Mischkneter
US6150498A (en) * 1996-07-12 2000-11-21 The Dow Chemical Company Polymer recovery
DE19743923C2 (de) * 1997-10-04 2000-06-15 Loedige Maschbau Gmbh Geb Mischwerkzeug
EP0957150A1 (en) * 1998-05-15 1999-11-17 Carbochimica S.p.A. Tar and/or oil pitch with a low content of polycyclic aromatic substances and a method for the preparation thereof
US6410783B1 (en) 2000-10-19 2002-06-25 Basf Corporation Method of producing carboxylic acid salts
US20040145964A1 (en) * 2001-04-25 2004-07-29 Alfred Kunz Mixer bars cleaning in a radial or axial manner
DE10331952A1 (de) * 2003-07-15 2005-02-10 Degussa Ag Vorrichtung und Verfahren zur diskontinuierlichen Polykondensation
US20050096502A1 (en) * 2003-10-29 2005-05-05 Khalili Theodore M. Robotic surgical device
US20100311920A1 (en) 2005-08-26 2010-12-09 Cid Centro De Investigacion Y Desarrollo Tecnologico Sa De Cv Using Reactive Block Copolymers as Chain Extenders and Surface Modifiers
DE102006015541A1 (de) * 2006-03-31 2007-10-04 List Holding Ag Verfahren und Vorrichtung zur Behandlung von zähviskosen Produkten
US20100311849A1 (en) 2006-08-23 2010-12-09 Cid Centro De Investigacion Y Desarrollo Tecnologico Sa De Cv Using Reactive Block Copolymers as Chain Extenders and Surface Modifiers
JP6632549B2 (ja) 2014-08-13 2020-01-22 ベルサリス、ソシエタ、ペル、アチオニＶｅｒｓａｌｉｓ Ｓ．Ｐ．Ａ． ロータおよび攪拌装置
CN112045883B (zh) * 2020-08-28 2022-09-09 东莞市信诚硅胶电子有限公司 一种新型可自动翻转橡胶的塑炼机
CN112619524B (zh) * 2021-03-09 2021-07-06 山东鸿承矿业(集团)有限公司 一种用于生产硫铁精矿粉的搅拌装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190006207A (en) * 1900-04-03 1900-05-05 Carl Lauber Improvements in Trough-like Mixing Machines.
CA1018514A (en) * 1974-10-25 1977-10-04 Basil A. Burgess Interdigitating helical blades and baffle fingers in a rotating, shear stirrer
CH661450A5 (en) * 1984-04-30 1987-07-31 List Ind Verfahrenstech Kneader mixer having counter-elements
DE3538070A1 (de) * 1985-10-25 1987-04-30 Krauss Maffei Ag Misch- und knetvorrichtung
CH672749A5 (US08063081-20111122-C00044.png) * 1986-12-19 1989-12-29 List Ag
CH674472A5 (US08063081-20111122-C00044.png) * 1987-05-06 1990-06-15 List Ag
CH674318A5 (US08063081-20111122-C00044.png) * 1987-08-28 1990-05-31 List Ag
DE3743051A1 (de) * 1987-12-18 1989-06-29 Davy Mckee Ag Vorrichtung zur behandlung von hochviskosen substanzen
CH678285A5 (US08063081-20111122-C00044.png) * 1988-02-16 1991-08-30 List Ag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9394626B2 (en) 2009-08-11 2016-07-19 List Holding Ag Method for treating a monomer, pre-polymer, polymer or a corresponding mixture

Also Published As

Publication number Publication date
CH679290A5 (US08063081-20111122-C00044.png) 1992-01-31
ATE82872T1 (de) 1992-12-15
CA2026845A1 (en) 1991-04-05
CA2026845C (en) 1994-11-01
EP0422454A1 (de) 1991-04-17
ES2036878T3 (es) 1993-06-01
DE59000547D1 (de) 1993-01-14
US5121992A (en) 1992-06-16

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