EP0445436B1 - Vorrichtung zum Mischen von Giessereiformstoffen - Google Patents

Vorrichtung zum Mischen von Giessereiformstoffen Download PDF

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Publication number
EP0445436B1
EP0445436B1 EP90125711A EP90125711A EP0445436B1 EP 0445436 B1 EP0445436 B1 EP 0445436B1 EP 90125711 A EP90125711 A EP 90125711A EP 90125711 A EP90125711 A EP 90125711A EP 0445436 B1 EP0445436 B1 EP 0445436B1
Authority
EP
European Patent Office
Prior art keywords
mixing
container
drive shaft
inserts
plane
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
EP90125711A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0445436A3 (en
EP0445436A2 (de
Inventor
Bernd Dipl.-Ing. Federhen
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.)
Alb Klein GmbH and Co KG
Original Assignee
Alb Klein GmbH and Co KG
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 Alb Klein GmbH and Co KG filed Critical Alb Klein GmbH and Co KG
Publication of EP0445436A2 publication Critical patent/EP0445436A2/de
Publication of EP0445436A3 publication Critical patent/EP0445436A3/de
Application granted granted Critical
Publication of EP0445436B1 publication Critical patent/EP0445436B1/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
    • 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
    • B01F27/86—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis co-operating with deflectors or baffles fixed to the receptacle
    • 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
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun 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
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
    • B01F27/951—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis with at least one stirrer mounted on the sun axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
    • 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
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2321—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes having different inclinations, e.g. non parallel
    • 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
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2324—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes planetary
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers

Definitions

  • the invention relates to a device for mixing foundry molding materials according to the preamble of the independent claim and to a method which can be carried out therewith.
  • Rotary mixing tool mixers are common in the foundry industry for mixing sand and binders. Their mixing effect is achieved in that the wing-like mixing tools rotate with the material to be mixed at a relative speed, rub, split and rearrange it. The mix is braked by the wall of the mixing container and moved in the center by the mixing tool.
  • Mixing tools can work according to DE-PS 26 08 775 in straight flow mixers with a horizontal drive shaft, according to DE-GM 82 34 900 in batch mixers with a vertical drive shaft or alternatively with an inclined axis.
  • the mixing effect of mixers with a rotating mixing tool can be increased by increasing the mixing tool speed until the friction of the material to be mixed on the wall of the mixing container is no longer sufficient and the material as a more or less compact mass follows the rotary movement of the mixing tool. This limits the friction, cutting and shifting forces required for the mixing process. This property is particularly noticeable when viscous components are present in the mix.
  • FR-A-2 011 198 discloses a generic device based on a cascade-like mixer group.
  • two mixing tools which are curved in plan view in the opposite direction to the direction of rotation and whose cross-section is vertical to the bottom of the container and which are seated on a common diameter on the central drive shaft, rotate directly above the bottom thereof.
  • resistance bodies protrude from the container wall - triangular in plan view.
  • peripheral speed is to be increased in mixers with a vertical axis
  • profiles are used above the mixing tools, the longitudinal axes of which extend parallel to the mixing container wall on which they are fixed. These profiles slow down the mix. In this area, however, the wall of the mixing container cannot be kept free of caking by a rotating scraper. On the one hand, the baked-on substances are missing in the mixture and, on the other hand, may require considerable cleaning effort.
  • the inventor has set himself the goal of creating a device of the generic type for mixing foundry molding materials which, on the one hand, offers a high mixing intensity and, on the other hand, is kept largely free from caking by the mixing tools and the movement of the material to be mixed.
  • the built-in bodies protruding from the wall of the container with a small lateral extension run in a common plane - as a construction plane for braking the mixture rotation - which divides the container interior into a pair of mixing rooms.
  • the mix is exchanged between the mixing rooms.
  • the mix rotation is slowed down in that level.
  • the flow of the mixed material keeps the container wall in the area between the installation bodies free of caking.
  • the specific selection of the number, cross-section and length of the installation bodies as well as their angle of attack to the mixer wall allows the mixing characteristics to be determined to a large extent. For this purpose, it has proven to be advantageous to design the installation body in the manner of a knife or as a bolt with a small cross-section or as a rod with a teardrop-shaped cross-section.
  • the slim, knife-like or drop-shaped cross-section result in a distribution of the mix flow with little friction. For example, they enable fast, dry, temperature-sensitive substances to be mixed.
  • Fatter cross-sections have a greater influence of friction and are more suitable, for example, for mixing solid and liquid components with one another - for example built-in bodies with a circular cross-section for treating quartz sand with liquid binder.
  • the axis of the installation body can also be curved in order to influence the flows of the mixed material; twisting the built-in body creates additional spatial flows in the mix, which can be helpful, for example, when mixing liquid components.
  • the installation bodies define a common level, which divides the interior of the container into mixing rooms.
  • the installation body is preferably provided between at least two mixing tools projecting adjacent to the drive shaft, each of which rotates in one of the mixing rooms and alternately conveys the mixed material from one of the mixing rooms to the other mixing room. The rotation of the mixing tools is transferred to the mix.
  • At least two mixing tools or the like protrude offset from a common support ring.
  • Several such mixing tool units can also be combined axially one behind the other with built-in or flow bodies arranged in between to form a continuous mixer. By moving the mixing tool blades differently, a transport component from the mixture inlet to the mixture discharge is superimposed on the mixing movement.
  • a further embodiment has the installation bodies in the container above the mixing tool, which determine a horizontal plane or a plane that is inclined to the horizontal, separating two mixing chambers lying one above the other. Below this level, the mixing tool projecting from the drive shaft is connected to a stripping device which extends over this level. Since, in the case of a version with a vertical or inclined axis, gravity moves the mix downward, it is sufficient to arrange a mixing tool only in the lower mixing chamber; the return transport is effected by gravity. It is also sufficient here to keep the upper mixing area free of caking by means of a light stripping device.
  • a scraper device with a rod-like section projecting radially from the drive shaft, a second section inclined toward it and reaching in front of the end faces of the installation bodies, and a further section running on the inside of the container have proven to be favorable.
  • a section that can be guided on the lid of the closed container can preferably be provided; thanks to this, the inside of the lid is kept free of caking, and the second section of the stripping device has the effect that, in the upper mixing chamber, material which is adhering to and on the end faces of the built-in body is scraped off and the mixed material which is braked in the area between the built-in body is given a new radial movement component. Before the mix can fall back into the lower mixing room, it is distributed radially again.
  • a device for distributing viscous media on the surface of granular substances contains, below the plane determined by the installation bodies, a mixing tool protruding from the drive shaft and at least one roller rotating relative to the drive shaft, the peripheral surface of which advantageously delimits an acute angle with the inner surface of the container.
  • the axis of this roller should form an angle with the drive shaft that is less than 90 °.
  • the roller When the entire mixer rotor rotates, the roller performs an additional self-rotation due to the frictional forces acting on it, which improves the aforementioned distribution of viscous media on the surface of granular substances.
  • the angular position forces an additional spatial shifting of the mix.
  • roller or its circumferential surface taper conically towards the level of the installation bodies and / or to provide the upper end face of the roller at a short distance from the assigned installation bodies, so as to promote stripping of the mixed material.
  • peripheral surface of the roller is provided with recesses and / or recesses leads to an increase in squeezing and shear forces acting on the mixture.
  • a container or housing 10 comprising a cylindrical housing shell 12 and disk-like end walls 14 of a mixer 16 mounted at 15 for mixing sand and binders in the foundry industry is shown in FIG. 1 by a drive shaft driven by a motor 18 and mounted in the end walls 14 20 enforced.
  • the shape of the outer edge 27 is adapted to the inner side 11 of the housing shell 12 adjacent to it.
  • the end edges 29 of the mixing tools 24 run radially to that drive shaft 20 near the inner surface 13 of the end wall 14.
  • these installation bodies 30 are formed by bolt-like parts of length i, which here is somewhat shorter than half the radius q of the housing shell 12.
  • the two mixing tools 24, as can be seen above all in FIG. 1, are provided offset on the drive shaft 20 and convey the batch-working mixer 16, which is not shown in the drawing for the sake of clarity, through closure elements in the housing jacket 12, not shown or mixed material fed or removed in the end walls 14 alternately from a mixing space A of the mixing space 17 to the other side of the plane E into a mixing space B.
  • the rotation (arrow x) of the mixing tools 24 is transferred to the mixed material.
  • the outer edges 27 of the mixing tools 24 keep the inside of the housing 11 free of caking in an area indicated by b in FIG. 1. This freedom from caking is further promoted by the small expansion a of the installation body 30, as a result of which they represent geometrically small obstacles.
  • the material to be mixed flows around the built-in bodies 30 on their way from the one mixing room A or B to the other mixing room B or A and thereby brake the rotation of the mixing material; strong shear and friction forces are created, which enable the mixing components to be mixed intensively and quickly.
  • the mixing characteristic can be influenced to a large extent.
  • the bolt-like installation bodies 30 of circular cross section shown in FIGS. 1, 2, 6 have e.g. proven to be particularly suitable for mixing quartz sand with liquid binders.
  • insert bodies 30 with a diameter d of 20 mm and a length i of 100 mm with a housing radius q of 270 mm are shown to be very effective.
  • mixing tools 24 can be combined axially one behind the other with installation bodies 30 arranged in between to form a continuous mixer 16 a . Due to the different placement of such mixing tools 24 or mixer blades, the mixing movement is superimposed on a transport component from a mixer inlet 32 to a mixture discharge 34. The individual mix components can also be supplied at various points in the housing 10.
  • the scraper 36 is formed such that starting from a radial arm 37 of the support sleeve 22 a is an upstanding front end faces 31 of the mounting body 30 of vertical section 38, connecting to the above that level H after a second radial arm 37 a a wandungsnaher second vertical portion 38 a. This is followed by a ridge arm 39 pointing towards the mixer axis M, which moves with play below the inside of a housing cover 14 a .
  • the vertical section 38 of the scraper 36 entrains mixed material adhering to the end faces 31 of the installation body 30 as it moves.
  • the scraper 36 gives the mixed material braked in the area between the installation bodies 30 in the upper mixing space F a new radial movement component; Before the mix can fall back into the lower mixing chamber C, it is distributed radially again.
  • an additional horizontal rotation profile 40 protrudes from the supporting bush 22 a , the radial extent n of which corresponds approximately to that of the radial arm 37. This rotation keeps the profile 40 located within the path of movement of the mixing tool edge 29 of the inner surface of the housing bottom 14 b of caking free.
  • concentric rings 41 connect the installation body 30 to a sieve-like flow body, above which a part 37 a , 38 a of the scraper 36 and under which the mixing tool 24 a rotates.
  • the mixed version 16 v of FIG. 6 has proven particularly useful, in which, in addition to the parts already described, a roller 42 is attached to a radial support arm 43 of the support sleeve 22 a .
  • the axis K of the roller 42 includes an angle w 1 with the mixer axis M, and the conical peripheral surface 44 of the roller 42 delimits a smaller acute angle w 2 with the housing shell 12.
  • an apron 45 hangs down as a mixture carrier to the housing base 14 a .
  • the mixer rotor 50 When the mixer rotor 50 consists of the carrying sleeve 22 a , the mixing tool 24 a , the carrying arm 43 and the roller 42, the latter performs an additional self-rotation due to the frictional forces acting on it. This improves the distribution of viscous media on the surface of granular substances.
  • the angles shown w1, w2 force an additional spatial shifting of the mix.
  • An upper end face 52 of the roller 42 should be at a short distance h from the installation bodies 30; the rotation of that mixing rotor 50, in superposition with the self-rotation of the roller 42, causes the material to be adhered to the end face 52 to be removed therefrom.
  • housing or the container 10 can also be non-cylindrical.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mold Materials And Core Materials (AREA)
EP90125711A 1990-03-05 1990-12-28 Vorrichtung zum Mischen von Giessereiformstoffen Expired - Lifetime EP0445436B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4006846A DE4006846A1 (de) 1990-03-05 1990-03-05 Vorrichtung zum mischen von giessereiformstoffen
DE4006846 1990-03-05

Publications (3)

Publication Number Publication Date
EP0445436A2 EP0445436A2 (de) 1991-09-11
EP0445436A3 EP0445436A3 (en) 1992-04-22
EP0445436B1 true EP0445436B1 (de) 1996-05-22

Family

ID=6401439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90125711A Expired - Lifetime EP0445436B1 (de) 1990-03-05 1990-12-28 Vorrichtung zum Mischen von Giessereiformstoffen

Country Status (5)

Country Link
US (1) US5393138A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0445436B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JP2902798B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE138300T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE4006846A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005029742B3 (de) * 2005-06-24 2006-08-24 Klein Anlagenbau Ag Verfahren zum Behandeln von Gießereiformstoffen

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Publication number Priority date Publication date Assignee Title
DE19521130C2 (de) * 1994-06-16 2000-06-15 Graemer Gerd Volker Vorrichtung zum Mischen eines körnigen Gutes mit einer Flüssigkeit
DE19533693A1 (de) * 1995-09-12 1997-03-13 List Ag Mischkneter
ATE487537T1 (de) * 2005-12-07 2010-11-15 Lico Spa Vorrichtung und verfahren zum kontinuierlichen horizontalen mischen
JP5646491B2 (ja) * 2009-09-04 2014-12-24 株式会社ツカサ 粉粒体攪拌装置
EP2488289B1 (de) * 2009-10-15 2016-03-30 Bühler AG Verfahren und verwendung zur verfeinerung
EP2488290B2 (de) 2009-10-15 2022-03-30 Bühler AG Verfahren und -verwendung zur zerkleinerung
SE536456C2 (sv) * 2011-12-15 2013-11-12 Metso Paper Sweden Ab Blandningsenhet innefattande åtminstone två rotorkroppar föranvändning i en blandningsanordning och en blandningsanordning
FI126111B (fi) * 2012-05-07 2016-06-30 Maricap Oy Menetelmä ja laitteisto materiaalin syöttämiseksi rotaatiomuokkainlaitteeseen
DE102013219061B3 (de) * 2013-09-23 2014-10-02 Klein Anlagenbau Ag Mischwerkzeug
JP5718511B1 (ja) * 2014-06-17 2015-05-13 株式会社清田鋳機 鋳物砂用連続ミキサーの清掃方法
CN105413512A (zh) * 2015-11-30 2016-03-23 天津威晟番茄制品有限公司 一种番茄酱包装机的搅拌装置
CN106424546A (zh) * 2016-11-09 2017-02-22 郑州莉迪亚医药科技有限公司 一种覆膜砂加工装置
CN114210249B (zh) * 2021-12-30 2024-11-08 沈阳智尔镁科技有限公司 一种镁砂自动化加工生产线

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Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914694A1 (de) * 1988-07-04 1990-01-11 Sanyo Chemical Ind Ltd Ruehrvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005029742B3 (de) * 2005-06-24 2006-08-24 Klein Anlagenbau Ag Verfahren zum Behandeln von Gießereiformstoffen

Also Published As

Publication number Publication date
JP2902798B2 (ja) 1999-06-07
DE4006846A1 (de) 1991-09-12
JPH04224042A (ja) 1992-08-13
US5393138A (en) 1995-02-28
DE4006846C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-10-22
ATE138300T1 (de) 1996-06-15
EP0445436A3 (en) 1992-04-22
EP0445436A2 (de) 1991-09-11
DE59010341D1 (de) 1996-06-27

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