EP0398992B1 - Procede pour melanger et appareil a melanger correspondant - Google Patents

Procede pour melanger et appareil a melanger correspondant Download PDF

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Publication number
EP0398992B1
EP0398992B1 EP89902946A EP89902946A EP0398992B1 EP 0398992 B1 EP0398992 B1 EP 0398992B1 EP 89902946 A EP89902946 A EP 89902946A EP 89902946 A EP89902946 A EP 89902946A EP 0398992 B1 EP0398992 B1 EP 0398992B1
Authority
EP
European Patent Office
Prior art keywords
mixing
axis
container
rotation
stochastic
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
EP89902946A
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German (de)
English (en)
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EP0398992A1 (fr
Inventor
Wolfgang Zimmermann
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Individual
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Individual
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Publication date
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Priority to AT89902946T priority Critical patent/ATE74794T1/de
Publication of EP0398992A1 publication Critical patent/EP0398992A1/fr
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Publication of EP0398992B1 publication Critical patent/EP0398992B1/fr
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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
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/50—Mixers with shaking, oscillating, or vibrating mechanisms with a receptacle submitted to a combination of movements, i.e. at least one vibratory or oscillatory movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/10—Mixers with rotating receptacles with receptacles rotated about two different axes, e.g. receptacles having planetary motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/40—Parts or components, e.g. receptacles, feeding or discharging means
    • B01F29/403—Disposition of the rotor axis
    • B01F29/4035—Disposition of the rotor axis with a receptacle rotating around two or more axes
    • B01F29/40353—Disposition of the rotor axis with a receptacle rotating around two or more axes being perpendicular axes

Definitions

  • the invention relates to a method for mixing according to the preamble of claim 1 and a mixing device therefor according to the preamble of claim 7.
  • Such a conventional mixing device has become known, for example, from US Pat. No. 3,018,092 and US Pat. No. 2,610,014.
  • the mixing container can be set in rotation about a drive axis, a shaking movement being initiated on the container at the same time. Both for the rotational movement and for the initiated shaking movement, which is driven via a planetary gear, takes place synchronously and together.
  • the object of the present invention is therefore to provide a method for mixing and an associated mixing device, in which a much faster and more uniform thorough mixing without a dead zone can be achieved with comparatively simple means compared to the prior art.
  • the invention achieves remarkable technical progress in an astonishing way.
  • Exact studies have shown that in conventional solid mixers due to the uniform or regularly recurring mixing movement with the sometimes very different particle properties that are to be mixed and which can differ from one another, for example in terms of their size, shape or density, not ideal uniform mixture can be generated, but rather that there is always a tendency to segregate.
  • Such a regular mixing movement can cause, for example, an increase in gravity in a solid stream; with high Froude numbers, which can mean a centrifugal movement of the mix, wind sifting can also occur, etc.
  • the Froude numbers are known to be the ratio of the centrifugal force (centrifugal force) to the gravity of the mix.
  • the method according to the invention and the associated mixing device according to the invention are distinguished above all by the fact that no uniform and repetitive motion sequences are used. Rather, when mixing, care is taken that the angle of the mixing container to the mixer axis changes irregularly during rotation of the mixing container about its axis of rotation or mixer shaft, i.e. is constantly set differently, so that a stochastic random distribution is given. In a further development, the speed, i.e. the speed of rotation and also the direction of rotation are constantly and irregularly adjusted so that a stochastic randomly distributed control is also provided.
  • the control system thus includes a random generator.
  • the speed and the direction of rotation of the axis of rotation or mixer shaft of the mixing container can also be controlled and changed stochastically. This double stochasm changes the Froude number constantly and unevenly. Separations are largely prevented, so that a mixing quality is achieved which was not previously possible due to separation.
  • the material funnels of the processing machines are used directly as mixing vessels in the large-scale industrial design of the mixing device according to the invention, so that demixing veins which occur when the material to be mixed is transferred are eliminated.
  • the material hopper must be placed on the processing machine free of vibrations.
  • Grinding media can also be added to the mixing vessel of the stochastically operating mixing device. This creates a stochastically controlled mill. Although different shapes are possible, spherical or cylindrical grinding media are particularly suitable. Due to the different Froude numbers, the solid is crushed both by the friction and by the impact. It is e.g. B. with a small Froude number, the blowing away of the fine fraction observed in vibrating ball mills before the impact of the grinding body is avoided. On the other hand, with a higher Froude number, coarse-grained regrind is broken up by impact. The stochastic control thus captures a broader grain spectrum during comminution.
  • the stochastically controlled tumbling movement of the mixing container can also be used for washing machines.
  • the device is used at least in those cases in which, as in the case of the textile parts in the washing drum, processing is to take place with a constantly changing Froude number.
  • the mixing vessel is guided through the tub with appropriate stochastic control.
  • a "unstable mixing tool” is already known, which is constructed in the manner of a stirrer.
  • This mixer works with a rotatably mounted stirrer, on which blades are usually attached. These blades should be adjustable in their angle of attack during rotation, the size of the angle of attack being subjected to random control.
  • This randomly controlled stochastic change in the angle of attack of the blades on the rotor similar to a propeller with rotor blades that can be changed in their angle of attack, but essentially only serves to stir liquids. But even when stirring powdery substances, the entire stirring and mixing process is comparable to that of liquids, since there is a fluidized flow behavior even when stirring substances containing powders or solid particles.
  • FIG. 1 and 2 show an example of a cylindrical mixing container 1 which is held over part of the fork suspension 5 forming the mixer shaft or axis of rotation 3 (but a one-sided suspension is also possible for easier assembly and disassembly of the mixing container).
  • the mixer shaft / axis of rotation 3 is driven by a drive 7 with a rotational speed or rotational speed which is distributed differently in a stochastically manner, the direction of rotation also being reversible in a stochastically distributed manner.
  • a further drive 12 is provided in the region of the fork suspension 5 for the stochastically changed setting of the inclination angle 9.
  • the electrical control and power supply lines are laid inside the shafts and require slip ring-like contacts at the appropriate locations, for example between the mixer shaft / axis of rotation 3 and the correspondingly fixed drive 7 of this axis.
  • the mixer shaft / axis of rotation 3 could also be rotated to achieve a further rotational movement in the sense of a third degree of freedom by a further, to the mixer shaft / axis of rotation 3 angular, oblique, in particular right-angled primary axis 13, the Arrangement similar to a cage can also be such that the extension of this third axis of rotation also intersects the elongated axis lines of the mixer shaft / axis of rotation 3 and the container axis 6 at a common intersection, which is preferably in the center or center of gravity of the mixing container 1.
  • This primary axis 13 can also be stochastic, i.e. are driven with randomly distributed speed and direction of rotation, namely via a further drive 15.
  • the mixing container 1 should not be spherical or cubic.
  • At least one boundary side of the mixing container can be designed in the form of a closable funnel 17.
  • This funnel 17 can be used when decanting the mixed material, so that segregation, as might occur when decanting the mixed material when using a separate funnel, is eliminated.
  • the material hopper of the processing machines is expediently used as a mixing vessel in large-scale industrial designs of the mixer device explained above. After mixing, the material hopper must be placed on the processing machine free of vibrations.
  • FIGS. 1 to 3 can in principle also be used in washing machines, the mixing container 1 then forming the washing drum which is guided through the tub.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Detergent Compositions (AREA)

Abstract

Les procédés et les mélangeurs employés jusqu'à présent pour obtenir des mélanges homogènes posent, sur le plan pratique, de nombreux problèmes, dans la mesure où l'on observe constamment une tendance non négligeable à la dissociation du mélange. L'invention permet de pallier cet inconvénient en prévoyant un récipient mélangeur pouvant pivoter simultanément autour de deux axes de rotation (3, 6) au moins, avec deux degrés de liberté, de manière à améliorer la qualité du mélange. Par rapport aux techniques actuelles, on constate une amélioration surprenante et très nette du mélange, principalement dans le cas d'un entraînement stochastique, c'est-à-dire irrégulier et aléatoire, et en relation également avec le nombre de tours et le sens de rotation.

Claims (14)

1. Procédé pour mélanger en particulier des substances solides, dans lequel on utilise un récipient de mélange (1) pouvant être rempli avec des substances à mélanger et qui peut tourner avec au moins deux degrés de liberté autour d'un arbre de mélangeur/axe de rotation (3) ainsi qu'autour d'un deuxième axe de récipient (6) en liaison avec celui-ci et portant, au moins de manière indirecte, le récipient de mélange (1), caractérisé en ce que le récipient de mélange (1) bascule avec un mouvement de mélange continuellement irrégulier et donc avec un nombre de Froude continuellement variable, tandis que le récipient de mélange (1) est entraîné avec une vitesse de rotation et/ou un sens de rotation irrégulier et stochastique, c'est-à-dire à distribution aléatoire.
2. Procédé selon la revendication 1, caractérisé en ce que l'axe du récipient (6) est entraîné avec une vitesse de rotation et/ou un sens de rotation irrégulier et stochastique, c'est-à-dire à distribution aléatoire.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'arbre de mélangeur/axe de rotation (3) pouvant être mis séparément en rotation et en liaison avec l'axe du récipient (6) est entraîné de manière stochastique, c'est-à-dire irrégulièrement avec distribution aléatoire, pour ce qui concerne sa vitesse de rotation et/ou son sens de rotation.
4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'angle d'inclinaison (9) projeté dans un plan de projection disposé perpendiculairement à l'axe du récipient (11), entre l'arbre de mélangeur/axe de rotation (3) projeté également dans ce plan de projection, d'une part et un axe longitudinal du récipient de mélange d'autre part, est modifié stochastiquement avec distribution aléatoire dans toute la zone de 360° autour de l'axe du récipient (11).
5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le mouvement de basculement du récipient de mélange (1) est réalisé avec trois degrés de liberté, c'est-à-dire également avec rotation autour du troisième axe d'entraînement (13), tandis que le troisième axe d'entraînement (13) est commandé de préférence de manière stochastique, c'est-à-dire irrégulièrement avec distribution aléatoire.
6. Procédé selon l'une des revendications 1 à 5 caractérisé en ce que, outre le produit à mélanger, des corps de broyage de préférence sous forme de silex, de porcelaine et/ou d'acier sont ajoutés au mélangeur.
7. Appareil à mélanger pour mettre en oeuvre le procédé selon l'une des revendications 1 à 6, avec un récipient de mélange (1) pouvant être fermé, dont l'arbre de mélangeur/axe de rotation (3) peut être mis en rotation au moyen d'un premier dispositif de commande (7) et de son autre axe d'entraînement (6, 13) par un autre dispositif de commande (12, 15), caractérisé en ce que le récipient de mélange (1) peut être entraîné de manière stochastique, c'est-à-dire avec une vitesse de rotation et/ou un sens de rotation irrégulier à distribution aléatoire.
8. Appareil de mélange selon la revendication 7, caractérisé en ce que l'axe de récipient (6, 13) et donc le réservoir de mélange (1) peuvent être entraînés par l'autre commande (12, 15) avec une vitesse de rotation et/ou un sens de rotation stochastique, c'est-à-dire irrégulier à distribution aléatoire.
9. Appareil de mélange selon la revendication 7 ou 8, caractérisé en ce que l'arbre de mélangeur/axe de rotation (3) en liaison avec l'axe du récipient peut être entraîné par la commande correspondante (7) avec une vitesse de rotation et/ou un sens de rotation stochastique, c'est-à-dire irrégulier et à distribution aléatoire.
10. Appareil de mélange selon l'une des revendications 7 à 9, caractérisé en ce que, outre l'axe de récipient (6) pouvant être mis en rotation du réservoir de mélange (1) et l'autre arbre de mélangeur/axe de rotation (3) portant l'axe de récipient (6), il est prévu un troisième axe de rotation primaire (13) qui peut être entraîné par une autre commande (15) avec, de préférence, une vitesse de rotation et/ou un sens de rotation stochastique, c'est-à-dire irrégulier et à distribution aléatoire.
11. Appareil de mélange selon l'une des revendications 7 à 10, caractérisé en ce qu'au moins deux, et de préférence trois axes de rotation séparés (3, 6, 13) sont disposés obliquement ou angulairement, y compris perpendiculairement les uns aux autres.
12. Appareil de mélange selon l'une des revendications 7 à 11, caractérisé en ce qu'un dispositif de commutation commandant la commande des axes (6, 3, 13) fonctionne avec un générateur aléatoire vrai ou quasi vrai.
13. Appareil de mélange selon l'une des revendications 7 à 12, caractérisé en ce que, sur au moins un côté du récipient de mélange (1), se trouve une trémie (17) pouvant être fermée.
14. Appareil de mélange selon l'une des revendications 7 à 13, caractérisé en ce que le réservoir de mélange (1) se présente sous forme d'un tambour de lavage et est monté de manière à pouvoir tourner dans une cuve de machine à lessiver.
EP89902946A 1988-03-09 1989-03-07 Procede pour melanger et appareil a melanger correspondant Expired - Lifetime EP0398992B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89902946T ATE74794T1 (de) 1988-03-09 1989-03-07 Verfahren zum mischen sowie zugehoerige mischvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3807658A DE3807658A1 (de) 1988-03-09 1988-03-09 Der sto-mischer
DE3807658 1988-03-09

Publications (2)

Publication Number Publication Date
EP0398992A1 EP0398992A1 (fr) 1990-11-28
EP0398992B1 true EP0398992B1 (fr) 1992-04-15

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EP89902946A Expired - Lifetime EP0398992B1 (fr) 1988-03-09 1989-03-07 Procede pour melanger et appareil a melanger correspondant

Country Status (7)

Country Link
US (1) US5238304A (fr)
EP (1) EP0398992B1 (fr)
JP (1) JP2543419B2 (fr)
KR (1) KR900700181A (fr)
AU (1) AU3195389A (fr)
DE (2) DE3807658A1 (fr)
WO (1) WO1989008495A1 (fr)

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JP2014237111A (ja) * 2013-06-10 2014-12-18 Omc株式会社 ミキシング装置及びミキシング方法
CN105177912B (zh) * 2015-09-14 2018-07-17 卢云丽 多桶摇摆撞击洗涤装置
CN105300782B (zh) * 2015-10-22 2018-05-08 青岛大学附属医院 一种检验科用血液自动混摇装置
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EP3390007A4 (fr) * 2016-04-30 2019-08-21 Hewlett-Packard Development Company, L.P. Mélange d'un matériau de construction en poudre pour fabrication additive
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19529872C2 (de) * 1995-08-14 2001-03-22 Planung Maschinen Und Muehlenb Freifallmischer für das gleichzeitige Mischen von Komponenten in mehreren, frei wählbaren, geschlossenen, fest montierten oder wechselbaren Behältern

Also Published As

Publication number Publication date
EP0398992A1 (fr) 1990-11-28
JP2543419B2 (ja) 1996-10-16
US5238304A (en) 1993-08-24
AU3195389A (en) 1989-10-05
DE58901193D1 (de) 1992-05-21
KR900700181A (ko) 1990-08-11
WO1989008495A1 (fr) 1989-09-21
JPH03503258A (ja) 1991-07-25
DE3807658A1 (de) 1989-09-21

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