EP3223934A1 - Dispositif de traitement et de refroidissement de sable de fonderie - Google Patents

Dispositif de traitement et de refroidissement de sable de fonderie

Info

Publication number
EP3223934A1
EP3223934A1 EP15798096.2A EP15798096A EP3223934A1 EP 3223934 A1 EP3223934 A1 EP 3223934A1 EP 15798096 A EP15798096 A EP 15798096A EP 3223934 A1 EP3223934 A1 EP 3223934A1
Authority
EP
European Patent Office
Prior art keywords
mixing
mixer
blade
mixer blade
container
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.)
Granted
Application number
EP15798096.2A
Other languages
German (de)
English (en)
Other versions
EP3223934B1 (fr
Inventor
Andreas Seiler
Feng Li
Stefan Gerl
Paul Eirich
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.)
Maschinenfabrik Gustav Eirich GmbH and Co KG
Original Assignee
Maschinenfabrik Gustav Eirich 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 Maschinenfabrik Gustav Eirich GmbH and Co KG filed Critical Maschinenfabrik Gustav Eirich GmbH and Co KG
Priority to PL15798096T priority Critical patent/PL3223934T3/pl
Priority to SI201531160T priority patent/SI3223934T1/sl
Publication of EP3223934A1 publication Critical patent/EP3223934A1/fr
Application granted granted Critical
Publication of EP3223934B1 publication Critical patent/EP3223934B1/fr
Priority to HRP20200729TT priority patent/HRP20200729T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/60—Mixing solids with solids
    • 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
    • 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
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/2122—Hollow shafts
    • 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
    • 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
    • B01F27/2322—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 with parallel axes
    • 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
    • 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
    • B01F27/808—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers driven from the bottom of 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
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/50—Mixing receptacles
    • B01F35/53—Mixing receptacles characterised by the configuration of the interior, e.g. baffles for facilitating the mixing of components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/91—Heating or cooling systems using gas or liquid injected into the material, e.g. using liquefied carbon dioxide or steam
    • 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
    • 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
    • B22C5/044—Devices having a vertical stirrer shaft in a fixed receptacle
    • 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
    • B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
    • 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
    • B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
    • B22C5/085—Cooling or drying the sand together with the castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F2035/98—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/02—Maintaining the aggregation state of the mixed materials

Definitions

  • the present invention relates to a device for cooling hot particle beds, in particular foundry sand.
  • Used foundry molding sand can be reused when processing foundry sand is recycled. For this it is necessary to cool the used sand.
  • Such a device is known for example from DE 1 508 698.
  • the device described therein consists of a mixing container and two vertically arranged drive shafts for a mixing tool.
  • the foundry molding sand to be cooled is introduced into the mixing vessel on one side and removed on the other side. While the foundry sand to be cooled passes through the device, the foundry sand is mixed with the aid of the mixing tools.
  • the mixing container has an opening for supplying air directly at the container bottom in the container wall.
  • the mixing container is integrated in a machine frame.
  • the mixing container itself has two mutually penetrating polygonal sections. In the center of each of the two sections, a corresponding rotatable mixing tool is arranged.
  • the mixing vanes mounted on the shaft typically have plate-shaped vanes which are moved on vertically arranged supports by radially extending rotating support arms.
  • the plate-shaped blades only have an effect on a circular path of limited expansion that is essentially locally around the blade.
  • the two sections penetrate, so that care must be taken when controlling the two mixing tools that they do not collide with each other, which makes a coordinated motion control necessary.
  • the cooling air introduced at the edge blows flow channels through the sand bed only in the immediate vicinity of the inlet openings and escapes upwards in a relatively short way, without the actual task of uniformity Fluidization of the bedding and cooling to meet high efficiency.
  • the center of the mix in the center of the container is not reached by the air, since this comes into contact with the outgoing and flowing air only on an outer annular path in the immediate vicinity of the air inlet openings. Due to the substantially higher flow resistance of the bed in the radial direction to the mixing shaft, the air flows vertically after exiting the slot-shaped opening and the lowest pressure loss following.
  • the rotating vanes mix the sand only slightly and slowly push it radially outward through the outboard facing blade to deliver it to the cooling zone.
  • the residence time of the mixed material also has large differences between the material located in the center of the container and on the outer circumference as a result of the speed differences.
  • the mixture moves from the feed opening located on the central axis to the opposite discharge opening in the region of the drive shafts, the cooler without substantial contact with the supplied cooling air.
  • very high exit velocities are observed by the locally arising vertical flow channels in the wall area of the mixed material bed, which entrain a large amount of solid particles due to the high speed and fluctuation of the flow.
  • a device for conditioning and cooling of foundry molding sand which has a mixing container and a mixing tool rotatable about a drive shaft, wherein an air supply is provided for supplying air into the container interior.
  • the mixing tool has at least two mixing blades spaced apart from one another in the vertical direction, and at least one mixing blade has a mixer blade inclined relative to the horizontal, which is preferably inclined downwards in the direction of rotation of the mixing tool.
  • the direction of rotation is predetermined by the drive device of the mixing tool. Therefore, the drive device of the mixing tool is designed such that it drives the mixing tool such that the mixing tools are inclined in the direction of rotation downwards. In an alternative embodiment, the drive device can also be designed such that, if necessary, the direction of rotation of the mixing tool can be changed.
  • the mixing blades preferably extend in the horizontal direction from the drive shaft.
  • the inclination of the mixer blade is such that the mixer blade, which is inclined in the direction of rotation of the mixing tool down, causes the mix is raised during mixing, whereby directly behind the mixer blade within the mix a cavity is formed, in which the supplied air can be distributed over the entire width and length of the mixer blade in the mix. Therefore, the mixer blade preferably extends over at least half the radius of the circle which the outer portion of the mixer blade describes when rotating. In one embodiment, it is provided that the mixer blade extends from the container wall to the drive shaft.
  • the mixer blade extends in a preferred embodiment substantially to the container wall.
  • the distance between the mixer blade and the container wall is preferably less than 100 mm and is best between 20 and 60 mm. By this measure, a layer loosening along the tool profile in the sand bed is achieved.
  • a vorzugticar flexible attachment is attached to the mixer blade, which projects radially over the mixer blade in the direction of the container wall and touches them, so that the attachment grinds in operation on the container wall.
  • the mixer blade is fluidically designed such that the mix is lifted upwards, so that forms a cavity on the side facing away from the flow of the mixer blade, which serves as a flow channel for incoming air.
  • the air can now flow over the cavity between the drive shaft and the container wall and ascend on the side facing away from the solid flow side by the falling behind the mixing tool due to gravity falling mixture, so that the mix flows evenly through to the center of the container by air flowing up becomes.
  • the drive for rotating the mixing tool is preferably designed such that the mixer blade has a peripheral speed at its radially outer end between 2 and 75 m per second and preferably between 30 and 60 m per second.
  • each mixing blade preferably has a mixer blade, wherein the distance between the mixer blade and the container wall is the same for both mixer blades. Due to the inclined container wall and the arrangement of the two mixer blades at different heights, this means that the mixer blade arranged further upwards must extend radially further outwards.
  • at least one mixer blade of each mixing tool is arranged substantially on the container bottom.
  • the mixing vessel has at least two mixing sections, wherein in each mixing section in each case a rotatable about a drive shaft mixing tool is provided, wherein preferably each mixing tool has at least two mixing blades, which are spaced apart in the vertical direction.
  • the peripheral speed of the mixing blades and the direction of rotation in the individual mixing sections may be different.
  • each mixing tool has a substantially arranged on the container bottom mixer blade, wherein the two mixing tools are so far apart that the two arranged on the container bottom mixer blades do not touch in any position of the mixing tools.
  • the circular paths of the two mixer blades arranged on the container bottom therefore border on each other tangentially in the narrowest case.
  • the vertically higher mixer blades of different mixing tools are preferably arranged at different axial heights. They are designed so that their orbits overlap. The different arrangement in the vertical direction avoids that a collision can occur. Due to the described embodiment, a close-wall design of all tools is possible. In addition, both mixing tools can be driven independently of each other with different speeds, without a collision must be feared. In this way, the mixing tools in the individual mixing container sections can be assigned an optimum speed for the respective predominant, process engineering task.
  • the tool speed of the material input side mixing chamber section can be optimized for efficient mixing of the water, while the speed of the tool in the subsequent mixing chamber section on the optimum flow of the sand bed with cooling air can be coordinated with reduced particulate discharge, since here by the moisture reduction, the stickiness of the particles has already subsided.
  • the mixing tool geometry in the different levels and mixing chamber sections can be designed differently, so that a corresponding optimization with regard to the flow through the sand bed is achieved while minimizing solids discharge from the bed.
  • the air supply may have openings in the container wall, through which air can be blown into the container interior. In this case, the openings are preferably arranged in the same vertical height as the mixer blade extending essentially to the container wall.
  • the air supply via the mixing tool itself which has for example a hollow shaft, is supplied.
  • the mixer blade may have corresponding air outlet openings on its side oriented opposite to the direction of rotation.
  • a combined air entry through openings in the container wall and through openings in the mixing tool would be possible.
  • the peripheral speed of the mixer blade increases with increasing distance from the drive shaft, with the result that the mixing action increases in the direction of the container wall.
  • the mixing intensity with increasing effective diameter will also increase, since the peripheral speed increases with increasing radius.
  • This physical law can be counteracted by suitable design of the Ouerterrorismsform the leaves from the inside out.
  • the mixer blade may have a width that increases in the radial direction.
  • the angle of inclination of the mixer blade to the horizontal in the radial direction may decrease.
  • the mixer blade can be flat or curved.
  • the angle of inclination with respect to the horizontal is preferably between 15 ° and 60 ° and particularly preferably between 20 ° and 50 °.
  • the mixer blade is formed as an angled profile, wherein the inner angle is arranged opposite to the direction of rotation of the mixer blade and is preferably between 90 ° and 180 °.
  • the mixer blade can also be a substantially closed polygonal profile, such as a rectangular or triangular profile, wherein corresponding air outlet openings are arranged on the side facing away from the flow, so that the cooling air can be introduced into the mix via the profile.
  • corresponding air outlet openings are arranged on the side facing away from the flow, so that the cooling air can be introduced into the mix via the profile.
  • on the radially inner portions of the mixing blade to compensate for the lower peripheral speed one or two-sided ploughshare-like attachments attached to strengthen on the one hand, the lifting and overflowing of the mixture and on the other to achieve an improved mixing effect.
  • a falling sand curtain can be created, which achieves a higher cooling capacity due to its larger heat and mass transfer surface in contact with the outflowing air.
  • the mixer blade of the topmost mixing blade is inclined in opposite directions, so that the mix is directed down to counteract excessive fluidization and concomitantly excessive discharge from the cooling device with the exhaust gas flow.
  • the distance between the arranged in the mixing container air inlet openings and the radially outer end of the mixer blade should be as low as possible in order to avoid that too much of the cooling air escapes upwards before reaching the mixer blade.
  • the mean flow velocity of the cooling air in the outlet region of the air inlet openings should be between 15 and 35 m / s and particularly preferably between 20 and 30 m / s.
  • the angle of inclination of the container wall can take on any value between 0 and 45 °, the inclination is preferably between 15 and 35 ° and particularly preferably between 20 and 30 ° relative to the vertical.
  • the quality of the cooled sand by the addition of, for example, water or other additives be corrected.
  • the foundry sand should have a residual moisture of between 3.0 and 3.5%, around which the sand enveloping bentonite, which causes the forming properties of the molding sand, to reactivate and to allow direct use in the molding machine.
  • the mixing tool in the third mixing chamber section ie the section through which the mixture flows last, to have mixer blades which are inclined upwards in the direction of rotation, thereby ensuring that in the last mixing chamber section there is a flow shearing stress of the mix comes.
  • the mixing chamber tool is designed with an opposite direction of rotation with respect to the mixing chamber tool of the second mixing chamber section.
  • the local flow rate is significantly reduced by the measures according to the invention, with the result that less solid particles are entrained and discharged by the air flow.
  • a solids separator is arranged above the mixing tool.
  • the deposition of the solid particles takes place in a turbulent flow, for example in a rotary flow generated by a rotor.
  • the forced rotary flow generates a corresponding centrifugal field, which can be adjusted by the choice of the rotational speed of the rotor in its strength. This makes it possible to set the separation performance and the size of the separation grain.
  • the rotational speed is increased sufficiently, the very fine additive components contained in the gas flow can be almost completely recycled.
  • Figure 1 is a sectional view of a first embodiment of the invention
  • FIG. 2 shows a sectional view of a second embodiment according to the invention
  • FIG. 3 shows a detailed view of a mixer with several different mixer blades
  • FIGS 4 to 8 are cross-sectional views of various mixer blades.
  • a first device according to the invention is shown in section.
  • the device 1 for processing and cooling of foundry sand has a mixing container 2, which is arranged in a housing 3.
  • the mixing container 2 has two mixing sections, in the center of which in each case a drive shaft 4 is arranged, which in turn each have a plurality of mixing blades with corresponding mixer blades.
  • the device 1 has an inlet 5 and an outlet 5 ' , via which hot foundry molding sand can be introduced into the mixing vessel 2, for example by means of a conveyor belt 6, or the treated sand can be discharged from the mixing vessel 2 again.
  • a series of cooling air openings 7 are introduced, can be introduced via the cooling air into the mixing vessel 2.
  • the two drive shafts 4 each have, close to the ground, mixing blades extending in opposite directions, on each of which a mixer blade 8 is mounted.
  • the two drive shafts 4 are arranged at a distance from each other such that in no rotational position the mixer blades 8, which are arranged close to the ground, can collide with one another.
  • In the vertical direction spaced from the bottom-near mixing blades further pairs of mixing blades are arranged, which are also each equipped with respective mixer blades.
  • all the mixer blades are inclined downwards, so that when the drive shaft is rotated in the intended direction, the foundry molding sand contained in the mixing vessel 2 is lifted and flows over the inclined mixing blade surface.
  • the mixer blades of the second and third planes are arranged at a height which corresponds to the vertical height of the air inlet openings 7 in the container wall 2.
  • the mixer blades of the levels 2 and 3 are arranged so that they reach almost to the air inlet openings 7.
  • the two drive shafts 4 are driven by means of the drive motors 9.
  • a solids separator 1 1 is arranged, which consists of a provided with lamellae wheel, which can be rotated by means of the drive motor 10.
  • FIG. 2 shows a schematic sectional view of an alternative embodiment of the invention.
  • the supply of cooling air takes place once via a trained as a hollow shaft drive shaft 4, in the means of the supply 12 air in the channel 15 and the channel into corresponding openings within the mixer blades 8, 8 ', 8 "and 8 "into the Pour mix. Additionally or alternatively, air can be brought into the housing and via the air inlet openings 7 in the mix via the air supply 13. It can be clearly seen in this embodiment that the mixing blades of the upper levels have a longer radial extent than the mixing blades of the lower level.
  • the mixer blades 8, 8 ', 8 "and 8"' extend substantially to the container wall. However, to avoid damage to the mixer blades, a small gap must remain.
  • the mixer blades can have an extension 14 made of plastic, which, moreover, can be pressed against the container wall with the aid of springs in order to reduce the proportion of the cooling air supply which flows directly vertically upwards.
  • mixer blades are shown by way of example in FIG.
  • the mixer blade could extend evenly from the drive shaft to the vessel wall.
  • the mixer blade would also curved shapes, as in the embodiment designated by the reference numeral 15, or fan-shaped expanding forms, as in the embodiment provided with the reference numeral 16 embodiment possible.
  • puck share-like attachments 19 are provided on the mixer wings.
  • Figure 4 shows a cross-sectional view through a mixer blade 20, which here consists of a single inclined surface.
  • a zone substantially free of the mixture is formed after the mixer blade into which the cooling air introduced into the mixing vessel through the air supply openings 7 can flow radially inwardly along the mixer blades.
  • the contour of the air outlet opening 7 is ideally chosen so that in combination with the geometry of the mixer blade as uniform and long-lasting air inflow into the freed from the mix zone behind the mixer blade can be done.
  • FIG. 5 shows a cross-sectional view of a second embodiment of a mixer blade 21.
  • the mixer blade consists of an inclined surface and an angled thereto, substantially horizontally extending surface.
  • FIG. 6 shows a cross section through a third embodiment of a mixer blade 2. Again, an inclined surface is provided, to which in one direction a substantially vertically extending portion and in the other direction an oppositely inclined portion connects.
  • FIG. 7 shows a cross section through a further embodiment of a mixer blade 23.
  • the mixer blade 23 again has an inclined surface. It is here mounted on a substantially tubular element through which cooling air can also be introduced into the mixing vessel.
  • FIG. 8 shows by way of example an embodiment in which different mixer blades 24 to 26 are mounted on the drive shaft in three different planes.
  • the mixer blade arranged in the lowest level has a downwardly inclined blade surface and a section extending substantially perpendicular thereto.
  • a mixer blade 25 having a cross section is used which forms a kind of cavity through which cooling air from the drive shaft can be transported radially outward.
  • a mixer blade 26 is used, which is inclined upwards to prevent excessive stirring of the mixed material.
  • further geometries for the design of the mixer blade are possible.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Mold Materials And Core Materials (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Accessories For Mixers (AREA)

Abstract

La présente invention concerne un dispositif (1) de traitement et de refroidissement de sable de fonderie qui comprend un récipient de mélange (2) et un outil de mélange rotatif autour d'un arbre d'entraînement (4), une alimentation en air (7) étant prévue pour amener de l'air à l'intérieur du récipient. L'objectif de l'invention est de fournir un dispositif amélioré qui permet d'obtenir un lit fluidisé plus uniforme si possible sur toute la section transversale du récipient de mélange et qui permet en outre de réduire la proportion de particules solides entraînées avec le flux de gaz. A cet effet, l'outil de mélange comporte au moins deux ailettes de mélange (8) espacées dans la direction verticale et au moins une ailette de mélange présente une lame de mélange pourvue d'une surface inclinée par rapport à l'horizontale.
EP15798096.2A 2014-11-28 2015-11-20 Dispositif de traitement et de refroidissement de sable de fonderie Active EP3223934B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL15798096T PL3223934T3 (pl) 2014-11-28 2015-11-20 Urządzenie do przygotowania i chłodzenia odlewniczego piasku formierskiego
SI201531160T SI3223934T1 (sl) 2014-11-28 2015-11-20 Naprava za obdelavo in hlajenje livarskega formarskega peska
HRP20200729TT HRP20200729T1 (hr) 2014-11-28 2020-05-06 Uređaj za obradu i hlađenje ljevaoničkog pijeska

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014117509.3A DE102014117509A1 (de) 2014-11-28 2014-11-28 Vorrichtung zur Aufbereitung und Kühlung von Gießereiformsand
PCT/EP2015/077278 WO2016083270A1 (fr) 2014-11-28 2015-11-20 Dispositif de traitement et de refroidissement de sable de fonderie

Publications (2)

Publication Number Publication Date
EP3223934A1 true EP3223934A1 (fr) 2017-10-04
EP3223934B1 EP3223934B1 (fr) 2020-02-26

Family

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EP15798096.2A Active EP3223934B1 (fr) 2014-11-28 2015-11-20 Dispositif de traitement et de refroidissement de sable de fonderie

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US (1) US10464033B2 (fr)
EP (1) EP3223934B1 (fr)
JP (1) JP6648122B2 (fr)
KR (1) KR102419659B1 (fr)
CN (2) CN204770462U (fr)
BR (1) BR112017008058B1 (fr)
CA (1) CA2964048C (fr)
DE (1) DE102014117509A1 (fr)
ES (1) ES2787374T3 (fr)
HR (1) HRP20200729T1 (fr)
MX (1) MX2017005854A (fr)
PL (1) PL3223934T3 (fr)
PT (1) PT3223934T (fr)
RU (1) RU2675559C2 (fr)
SI (1) SI3223934T1 (fr)
TW (1) TWI653109B (fr)
UA (1) UA121487C2 (fr)
WO (1) WO2016083270A1 (fr)
ZA (1) ZA201702860B (fr)

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CN107999697A (zh) * 2018-01-23 2018-05-08 江西力天机械有限公司 一种双臂树脂砂混砂机
CN108211846A (zh) * 2018-01-26 2018-06-29 安徽省鸣新材料科技有限公司 一种石墨烯泡沫铝复合搅拌桨
CN111888965B (zh) * 2020-09-29 2021-03-12 安徽尚成建设工程有限公司 基于气流浮动的连续环流式搅拌桨及彩砂混砂机构
CN115069008A (zh) * 2022-07-27 2022-09-20 山东科技职业学院 一种水质净化装置
CN116674214B (zh) * 2023-05-21 2023-11-24 江苏万恒铸业有限公司 带有筛分功能的铸钢件铸造废料回收装置
CN117733065B (zh) * 2023-10-26 2024-05-31 连云港赣榆腾飞机械铸造有限公司 一种铸造覆膜砂回收再生装置及其方法

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Also Published As

Publication number Publication date
PL3223934T3 (pl) 2020-08-24
CN107000035A (zh) 2017-08-01
TWI653109B (zh) 2019-03-11
PT3223934T (pt) 2020-05-18
ZA201702860B (en) 2018-09-26
KR20170088845A (ko) 2017-08-02
ES2787374T3 (es) 2020-10-16
SI3223934T1 (sl) 2020-07-31
HRP20200729T1 (hr) 2020-07-24
EP3223934B1 (fr) 2020-02-26
KR102419659B1 (ko) 2022-07-11
RU2675559C2 (ru) 2018-12-19
CN107000035B (zh) 2020-10-16
BR112017008058B1 (pt) 2022-05-24
WO2016083270A1 (fr) 2016-06-02
CN204770462U (zh) 2015-11-18
TW201618872A (zh) 2016-06-01
RU2017113735A (ru) 2018-10-23
CA2964048A1 (fr) 2016-06-02
UA121487C2 (uk) 2020-06-10
US10464033B2 (en) 2019-11-05
RU2017113735A3 (fr) 2018-11-15
MX2017005854A (es) 2017-06-27
US20180229196A1 (en) 2018-08-16
JP2017536974A (ja) 2017-12-14
CA2964048C (fr) 2021-03-16
JP6648122B2 (ja) 2020-02-14
DE102014117509A1 (de) 2016-06-02
BR112017008058A2 (pt) 2017-12-26

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