EP0351125A1 - Apparat zum Mischen und Abgeben von Materialien - Google Patents

Apparat zum Mischen und Abgeben von Materialien Download PDF

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Publication number
EP0351125A1
EP0351125A1 EP89306819A EP89306819A EP0351125A1 EP 0351125 A1 EP0351125 A1 EP 0351125A1 EP 89306819 A EP89306819 A EP 89306819A EP 89306819 A EP89306819 A EP 89306819A EP 0351125 A1 EP0351125 A1 EP 0351125A1
Authority
EP
European Patent Office
Prior art keywords
vessel
rotors
series
cage
shaft
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.)
Withdrawn
Application number
EP89306819A
Other languages
English (en)
French (fr)
Inventor
Colin Frederick Bow
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.)
Netzsch Mastermix Ltd
Original Assignee
Netzsch Mastermix Ltd
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 Netzsch Mastermix Ltd filed Critical Netzsch Mastermix Ltd
Publication of EP0351125A1 publication Critical patent/EP0351125A1/de
Withdrawn legal-status Critical Current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
    • B01F27/05—Stirrers
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/091—Stirrers characterised by the mounting of the stirrers with respect to the receptacle with elements co-operating with receptacle wall or bottom, e.g. for scraping the receptacle wall
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/84—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers rotating at different speeds or in opposite directions about the same axis
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/93—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with rotary discs
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/191—Stirrers with two or more mixing elements mounted in sequence on the same axis with similar elements

Definitions

  • This invention relates to apparatus for mixing and dispensing particulate materials in solvent liquids, especially but not exclusively in the manufacture of paints by incorporating opacifiers and pigments in the solvents
  • a successful prior art apparatus comprises a cylindrical vessel having a slow speed rotor with a blade generally of the shape and size of the vessel so as to closely conform to the vessel side wall and which is for maintaining a general mixing or circulating flow in the vessel contents, together with one or more high speed rotor discs for dispersion, which is effected by the shearing forces provided by the acceleration of the material due to the high speed rotor.
  • the economic considerations of the mixing and dispersing apparatus include energy input and time taken (which are in general related) but limiting factors include heat evolution which may be deleterious to some materials which are to be mixed as well as representing energy loss.
  • the object of the invention is to provide improved apparatus.
  • mixing and dispersing apparatus having a main rotor shaft provided with a series of axially spaced rotors of progressively greater effective diameter along the length of the shaft.
  • the rotors may be driven at constant speed, or e.g. at variable speeds according to the stage in the mixing and dispersion cycle.
  • the stacked rotor assembly of the present invention may be used in a container or vessel arranged for a natural circulation or flow within the vessel or it may be arranged for flow through the vessel, that is to say from an inlet past the rotors to an outlet with continuous flow therethrough, possibly with recirculation via an external passage.
  • the vessel may be of generally the same cross sectional shape as the stacked rotor assembly giving the possibility of shearing forces being created by flow between the rotor discs and the vessel wall.
  • the stacked rotor assembly is associated with a cage which is generally complementary in shape to the stacked rotors, so that acceleration and shear forces are created between the cage and the rotor tips.
  • the cage may be complementary to the vessel shape or not. This also creates the possibility of using a vessel of more complex shape and of arranging for the rotor assembly with or without cage to be movable relative to the vessel so as to operate in different portions of the vessel to different effects at different times.
  • the cage is water-cooled.
  • Overhung shaft 16 extends generally axially of the vessel from a motor 18 at the top through a seal 20, and carries a series of (in this instance) five rotor discs 22 - 30 which are of progressively larger diameter from the free end towards the motor so that there is a generally similar clearance between the tip of each rotor and the vessel wall.
  • the solvents and pigment may be fed through common or separate supply means via inlet 12, and circulated via a passage connecting outlet 14 with inlet 12 or for example solvent can be pumped continuously through the inlet 12 and out of the outlet 40 and from time to time pigments, and opacifiers and the like charged into the vessel at any suitable point.
  • the arrangement of Figure 1 can run continuously whilst circulating a single batch, or continuously producing completely mixed and dispersed product.
  • the materials are subject to increasing acceleration due to the series of discs of progressively larger diameter, and all of which are inherently driven at the same rotary speed and hence higher tip speed, so that the material is subject to a series of increasing shearing forces at the tips.
  • the arrangement is more primarily concerned for batch production and the vessel 101 has a frusto-conical lower portion 30 and a generally cylindrical upper portion 32.
  • the stacked rotor assembly carried by shaft 161 is designed to be raised and lowered, i.e. moved in the direction of the arrows AA relative to the vessel.
  • the shaft 16 is again overhung, and the vessel is provided with ports 121 and 141 at the bottom and top respectively.
  • the vessel may be charged with solvent for example through the port 141 and particulate material may be vacuum induced in the vessel through the port 121. Alternatively and for example, the particulate material may be charged through the port 141.
  • FIG. 3 is a further version primarily arranged for batch production like Figure 2 but in this case the stacked rotor set driven by the overdrive shaft 162 is associated with a cage 36 carried by a stationary guide member 38, and the shearing forces applied to the material are due to the flow of the material between the rotor disc peripheries and the cage portions 40.
  • the whole assembly of cage and rotors is vertically movable relative to the vessel.
  • Figure 3 also shows the use of a slow speed stirring rotor 42 which in this instance is underdriven from shaft 44 via gearbox 46.
  • the shaft 44 may be a hollow one providing for vacuum induction of particulate material via the valve 48.
  • the cage is cooled, for example water-­cooled and coolant may be delivered to the cage via pipes 41,43 extending through a non-rotating sleeve 45 journalling the drive shaft 162.
  • coolant may be delivered to the cage via pipes 41,43 extending through a non-rotating sleeve 45 journalling the drive shaft 162.
  • the arrangement shown in Figure 4 differs from that in Figure 3 in that the slow speed rotor 421 is overdrive instead of being underdriven.
  • the whole rotor assembly may be raised and lowered.
  • the effect on the product will be varied by so doing.
  • the effect (of raising) will be to reduce the shear forces effect from the lower rotors because of the increased space from the vessel wall, and hence produce a more general stirring effect.
  • the arrangement in Figure 5 is generally similar to that in Figure 1 but in this case the arrangement includes a series of fixed baffles 50 interposed between the successive rotors and extending from the container walls towards the shaft. The effect of these is to cause an extended flow path for the whole of the material in flow from the inlet to the outlet so that it reverses direction radially and is subject to shearing forces in flow not only between the rotor tip and the container wall but also between the rotor and each of the baffles.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP89306819A 1988-07-15 1989-07-05 Apparat zum Mischen und Abgeben von Materialien Withdrawn EP0351125A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8816890 1988-07-15
GB888816890A GB8816890D0 (en) 1988-07-15 1988-07-15 Apparatus for mixing & dispersing materials

Publications (1)

Publication Number Publication Date
EP0351125A1 true EP0351125A1 (de) 1990-01-17

Family

ID=10640518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89306819A Withdrawn EP0351125A1 (de) 1988-07-15 1989-07-05 Apparat zum Mischen und Abgeben von Materialien

Country Status (4)

Country Link
EP (1) EP0351125A1 (de)
DK (1) DK343389A (de)
GB (2) GB8816890D0 (de)
PT (1) PT91168A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19811112A1 (de) * 1998-03-13 1999-09-16 Speedform Gmbh Vorrichtung und Verfahren zum Mischen schnell härtender Einbettmasse zur Herstellung von Metallgußformen
WO2007129340A1 (en) * 2006-05-10 2007-11-15 Comber S.R.L. Conical-base drier
JP2014223581A (ja) * 2013-05-16 2014-12-04 株式会社井上製作所 低剪断型同芯２軸ミキサー
CN105480655A (zh) * 2015-12-04 2016-04-13 宜兴天山水泥有限责任公司 一种水泥输送系统
EP3065552A4 (de) * 2013-11-08 2017-07-26 Sanso Förvaltning AB Knetvorrichtung
KR20200038194A (ko) * 2018-10-02 2020-04-10 아사다텍코 가부시키가이샤 교반 장치

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5577675A (en) * 1995-01-25 1996-11-26 Mitsui Mining Co., Ltd. Agitating pulverizer
US6012473A (en) * 1998-03-18 2000-01-11 Takehiko Koyama Fluid mixer and roller cleaner
DE102011006636A1 (de) * 2011-04-01 2012-10-04 Harald Kniele Zwangsmischer mit Selbstreinigungsfunktion und Verwendung eines Innenrüttlers hierfür
JP6725504B2 (ja) * 2015-07-01 2020-07-22 住友重機械プロセス機器株式会社 撹拌装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378841A (en) * 1932-02-20 1932-08-18 Albert Henkel Improvements in and relating to mixing and stirring machines
US2163150A (en) * 1937-08-14 1939-06-20 Sinclair Refining Co Oil refining apparatus
US2315251A (en) * 1941-06-25 1943-03-30 Edwin G Eppenbach Combination mixer
US3010803A (en) * 1956-06-21 1961-11-28 Shell Oil Co Fluid mixer with rotating baffles
US3158358A (en) * 1963-03-11 1964-11-24 Patterson Kelley Co Materials blending machine
US3172609A (en) * 1960-11-03 1965-03-09 Kaiser Aluminium Chem Corp Apparatus for disintegrating aggregates of solid material
FR1525094A (fr) * 1966-04-18 1968-05-17 Procédé et dispositif pour la préparation de mortier de ciment et de béton
DE2446975A1 (de) * 1974-10-02 1976-04-15 Hoechst Ag Vorrichtung zum behandeln von koernigen und pastoesen stoffen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB270656A (de) * 1926-05-10 1928-02-02 Societe Chimique Des Usines Du Rhone
GB1037665A (en) * 1962-08-31 1966-08-03 Unilever Ltd Mixing device
US3268213A (en) * 1964-06-08 1966-08-23 Charles F Cala Apparatus for homogenizing glass

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378841A (en) * 1932-02-20 1932-08-18 Albert Henkel Improvements in and relating to mixing and stirring machines
US2163150A (en) * 1937-08-14 1939-06-20 Sinclair Refining Co Oil refining apparatus
US2315251A (en) * 1941-06-25 1943-03-30 Edwin G Eppenbach Combination mixer
US3010803A (en) * 1956-06-21 1961-11-28 Shell Oil Co Fluid mixer with rotating baffles
US3172609A (en) * 1960-11-03 1965-03-09 Kaiser Aluminium Chem Corp Apparatus for disintegrating aggregates of solid material
US3158358A (en) * 1963-03-11 1964-11-24 Patterson Kelley Co Materials blending machine
FR1525094A (fr) * 1966-04-18 1968-05-17 Procédé et dispositif pour la préparation de mortier de ciment et de béton
DE2446975A1 (de) * 1974-10-02 1976-04-15 Hoechst Ag Vorrichtung zum behandeln von koernigen und pastoesen stoffen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19811112A1 (de) * 1998-03-13 1999-09-16 Speedform Gmbh Vorrichtung und Verfahren zum Mischen schnell härtender Einbettmasse zur Herstellung von Metallgußformen
WO2007129340A1 (en) * 2006-05-10 2007-11-15 Comber S.R.L. Conical-base drier
JP2014223581A (ja) * 2013-05-16 2014-12-04 株式会社井上製作所 低剪断型同芯２軸ミキサー
EP3065552A4 (de) * 2013-11-08 2017-07-26 Sanso Förvaltning AB Knetvorrichtung
US10004238B2 (en) 2013-11-08 2018-06-26 Sanso Forvaltning Ab Kneading device for post-working of a product
CN105480655A (zh) * 2015-12-04 2016-04-13 宜兴天山水泥有限责任公司 一种水泥输送系统
KR20200038194A (ko) * 2018-10-02 2020-04-10 아사다텍코 가부시키가이샤 교반 장치

Also Published As

Publication number Publication date
DK343389A (da) 1990-01-16
GB2220585A (en) 1990-01-17
GB8816890D0 (en) 1988-08-17
PT91168A (pt) 1990-02-08
GB8915294D0 (en) 1989-08-23
DK343389D0 (da) 1989-07-11

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