DE1110827B - Device for cooling and mixing foundry sand - Google Patents

Device for cooling and mixing foundry sand

Info

Publication number
DE1110827B
DE1110827B DEG25097A DEG0025097A DE1110827B DE 1110827 B DE1110827 B DE 1110827B DE G25097 A DEG25097 A DE G25097A DE G0025097 A DEG0025097 A DE G0025097A DE 1110827 B DE1110827 B DE 1110827B
Authority
DE
Germany
Prior art keywords
cooling
sand
tunnel
mixing
conveyor belt
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.)
Pending
Application number
DEG25097A
Other languages
German (de)
Inventor
Hermann Ahlburg
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.)
GRAUE GmbH
Original Assignee
GRAUE GmbH
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 GRAUE GmbH filed Critical GRAUE GmbH
Priority to DEG25097A priority Critical patent/DE1110827B/en
Publication of DE1110827B publication Critical patent/DE1110827B/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B01F33/26—Mixers with an endless belt for transport of the material, e.g. in layers or with mixing means above or at the end of the belt
    • 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
    • B22C5/0477—Mixing while transporting the mixture on an endless belt, e.g. with driven stirring elements
    • 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
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0721—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis parallel with respect to the rotating 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Description

Vorrichtung zum Kühlen und Mischen von Gießereisand Es sind fahrbare Aufbereitungs- und Kühlvorrichtungen für Gießereisand bekannt, bei denen auf der aus einem langsam laufenden Transportband bestehenden Kühlstrecke zusätzlich eine Mischvorrichtung in Gestalt eines verhältnismäßig schnell umlaufenden Schleuderrades vorgesehen ist. Diese Vorrichtungen, bei denen die Kühlung des Sandes ausschließlich durch Wasser erfolgt, besitzen naturgemäß keinen über der Kühlstrecke angeordneten Kühltunnel.Device for cooling and mixing foundry sand There are mobile ones Processing and cooling devices for foundry sand known where on the an additional cooling section consisting of a slow-moving conveyor belt Mixing device in the form of a relatively fast rotating impeller is provided. These devices in which the cooling of the sand is exclusively takes place by water, naturally have none arranged above the cooling section Cooling tunnel.

Ein solcher über der ebenfalls aus einem Transportband bestehenden Kühlstrecke vorgesehener Kühltunnel ist jedoch erforderlich und insbesondere bei solchen ortsfesten Oießereisandkühlvorrichtungen bekannt, die mit Luftkühlung arbeiten. Der Tunnel dient dabei zum Hindurchleiten der Kühlluft, die den dem Transportband aufgegebenen Sand bestreicht. One above the one that also consists of a conveyor belt However, the cooling tunnel provided for the cooling section is required and in particular at such stationary Oießereisandkühlvorrichtungen known that work with air cooling. The tunnel is used to guide the cooling air through, which the conveyor belt brushed on abandoned sand.

Da hierbei jedoch nur die Oberfläche der durch den Kühltunnel transportierten Sandschicht dem Kühlluftstrom ausgesetzt wird, ist dieKühlwirkung solcher Anlagen in keiner Weise befriedigend.Since, however, only the surface of the transported through the cooling tunnel Sand layer is exposed to the cooling air flow, is the cooling effect of such systems in no way satisfactory.

Um diese Kühlwirkung zu verbessern, wurde auch schon vorgeschlagen, die Kühlstrecke als luftdurchlässiges Transportband auszubilden, so daß die Kühlluft durch den auf diesem Band befindlichen Sand hindurchgeleitet wird. Die Kühlwirkung wird durch diese Maßnahme zwar zweifellos gesteigert, jedoch sind die solcherart ausgebildeten Anlagen insofern zu bemängeln, als durch besondere Einrichtungen dafür gesorgt werden muß, daß der vorher in einer Mischvorrichtung gemischte Sand vollständig locker auf das Transportband aufgebracht werden muß. Ein weiterer Nachteil besteht auch darin, daß die Mischvorrichtung als besondere, außerhalb der Kühlvorrichtung angeordnete Einrichtung ausgebildet ist, wodurch der Aufbau der Anlage kompliziert wird und erheblichen Raum beansprucht. In order to improve this cooling effect, it has already been suggested that to design the cooling section as an air-permeable conveyor belt, so that the cooling air is passed through the sand on this belt. The cooling effect is undoubtedly increased by this measure, but they are of this type to complain about trained systems insofar as special facilities for it it must be ensured that the sand previously mixed in a mixer is completely must be applied loosely to the conveyor belt. There is another disadvantage also in the fact that the mixing device as special, outside the cooling device arranged device is formed, whereby the structure of the system complicated and takes up considerable space.

DieErfindung betrifit eine Vorrichtung zum Kühlen und Mischen von Gießereisand mit einen Kühltunnel langsam durchlaufendem Transportband und stellt sich die Aufgabe, nicht nur eine wirksame Durchmischung des Altsandes mit anderen Zusätzen, z. B. The invention relates to an apparatus for cooling and mixing Foundry sand with a conveyor belt running slowly through a cooling tunnel and provides the task of not only an effective mixing of the used sand with others Additives, e.g. B.

Neusand oder sonstigen Beigaben, sondern gleichzeitig und ohne Anwendung besonderer Hilfsmittel auch eine intensive Sandkühlung in der gleichen, eine einfache, geschlossene und raumsparende Bauart aufweisenden Anlage zu ermöglichen. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß innerhalb des Kühltunnels ein oder mehrere zur Förderrichtung des Transportbandes gegenläufig rotierende, langsam umlaufende Schaufelräder angeordnet sind, die den Sand wurfweise dem Kühlluftstrom aussetzen und ihn gleichzeitig durchmischen.New sand or other additions, but at the same time and without application special aids also an intensive sand cooling in the same, a simple, to enable closed and space-saving design having system. This task is achieved according to the invention in that one or more within the cooling tunnel Slowly rotating counter-rotating to the conveying direction of the conveyor belt Paddle wheels are arranged, which expose the sand in litter to the cooling air flow and mix it up at the same time.

Dabei kann die Vorrichtung zweckmäßig mit einer entsprechend der Sandtemperatur regelbaren, innerhalb des Kühltunnels angeordneten Wassersprühanlage versehen und vorteilhaft derart ausgestaltet sein, daß dem Kühltunnel ein weiterer mit einem oder mehreren Schaufelrädern versehener Mischtunnel für das Zumischen von Zuschlagstoffen, beispielsweise Betonit oder Kohlenstaub, nachgeordnet ist. The device can expediently with a corresponding to Sand temperature adjustable water spray system arranged inside the cooling tunnel provided and advantageously designed such that the cooling tunnel is another Mixing tunnel with one or more paddle wheels for mixing of aggregates, for example bentonite or coal dust, is subordinate.

In der Zeichnung ist auf schematische Weise ein Ausführungsbeispiel der Erfindung dargestellt. The drawing shows in a schematic manner an embodiment of the invention shown.

Über dem mit einer Sand aufgabe 1 versehenen, langsam in Pfeikichtung laufenden Transportband 2 ist in bekannter Weise ein Kühltunnel 3 mit den zur Kühlluftzufuhr dienenden Öffnungen 4 und der Abluftöffnung 5 vorgesehen. In diesem Kühltunnel 3, der erfindungsgemäß gleichzeitig als Mischbehälter dient, sind ferner vorzugsweise mehrere langsam umlaufende Schaufelräder 6 angeordnet, die in das dem Transportband 2 aufgegebene und den Tunnel 3 in einer gewissen Schichtstärke von etwa 100 bis 150 mm durchlaufende, aus Altsand und z. B. Neusand bestehende Fördergut eingreifen. Die Schaufelräder 6 setzen den Sand wurfweise dem Kühlluftstrom aus und durchmischen ihn gleichzeitig. Zwecks Erhöhung der Kühlwirkung kann dabei vorteilhaft eine entsprechend der Sandtemperatur regelbare Wassersprühanlage 8 angeordnet sein. Above the one provided with a sand task 1, slowly in arrow direction running conveyor belt 2 is in a known manner a cooling tunnel 3 with the cooling air supply Serving openings 4 and the exhaust air opening 5 are provided. In this cooling tunnel 3, which according to the invention also serves as a mixing container are also preferred several slowly rotating paddle wheels 6 are arranged, which are in the conveyor belt 2 abandoned and the tunnel 3 in a certain layer thickness of about 100 to 150 mm continuous, made of used sand and z. B. New sand intervene existing conveyed. The paddle wheels 6 expose the sand to the cooling air flow and mix it by throwing it him at the same time. In order to increase the cooling effect, a corresponding one can advantageously be used the sand temperature adjustable water spray system 8 be arranged.

Zweckmäßig ist es ferner, wenn dem Kühltunnel 3 ein Mischtunnel 7 nachgeordnet wird. Dieser Tunnel 7 enthält ebenfalls ein oder mehrere umlaufende Schaufelräder 6' und dient dazu, dem aus dem Kühltunnel 3 herausgeförderten kühlen Gemisch weitere Zusätze, z. B. Bentonit und Kohlenstaub od. dgl., zuzumischen. It is also useful if the cooling tunnel 3 has a mixing tunnel 7 is subordinated. This tunnel 7 also contains one or more circumferential ones Paddle wheels 6 'and is used to further the cool mixture conveyed out of the cooling tunnel 3 Additives, e.g. B. bentonite and coal dust od. Like. To be mixed.

Claims (3)

PATENTANSPRÜCHE: 1. Vorrichtung zum Kühlen und Mischen von Gießereisand mit einen Kühltunnel langsam durchlaufendem Transportband, dadurch gekennzeichnet, daß innerhalb des Kühltunnels (3) ein oder mehrere zur Förderrichtung des Transportbandes (2) gegenläufig rotierende, langsam umlaufende Schaufelräder (6) angeordnet sind, die den Sand wurfweise dem Kühlluftstrom aussetzen und ihn gleichzeitig durchmischen. PATENT CLAIMS: 1. Device for cooling and mixing foundry sand with a conveyor belt running slowly through a cooling tunnel, characterized in that that within the cooling tunnel (3) one or more to the conveying direction of the conveyor belt (2) counter-rotating, slowly rotating paddle wheels (6) are arranged, which expose the sand to the flow of cooling air in litters and mix it at the same time. 2. Vorrichtung nach Anspruch 1, gekennzeichnet durch eine entsprechend der Sandtemperatur regelbare Wassersprühanlage (8) innerhalb des Kühltunnels (3). 2. Apparatus according to claim 1, characterized by a corresponding the sand temperature adjustable water spray system (8) within the cooling tunnel (3). 3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß dem Kühltunnel(3) ein weiterer mit einem oder mehreren Schaufelrädern (6') versehener Mischtunnel (7) für das Zumischen von Zuschlagstoffen, beispielsweise Bentonit oder Kohlenstaub, nachgeordnet ist. 3. Apparatus according to claim 1, characterized in that the cooling tunnel (3) another mixing tunnel provided with one or more paddle wheels (6 ') (7) for adding aggregates, e.g. bentonite or coal dust, is subordinate. In Betracht gezogene Druckschriften: Österreichische Patentschrift Nr. 196075; französische Patentschrift Nr. 1027 049; USA.-Patentschrift Nr. 2778076; »Gießerei«, 1954, S. 5811582. Publications considered: Austrian patent specification No. 196075; French Patent No. 1027 049; U.S. Patent No. 2778076; "Foundry", 1954, p. 5811582.
DEG25097A 1958-08-12 1958-08-12 Device for cooling and mixing foundry sand Pending DE1110827B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG25097A DE1110827B (en) 1958-08-12 1958-08-12 Device for cooling and mixing foundry sand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG25097A DE1110827B (en) 1958-08-12 1958-08-12 Device for cooling and mixing foundry sand

Publications (1)

Publication Number Publication Date
DE1110827B true DE1110827B (en) 1961-07-13

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1196818B (en) * 1961-10-30 1965-07-15 Nat Engineering Company Of Can Device for cooling coarse masses, especially foundry sand
DE1245047B (en) * 1962-04-18 1967-07-20 Ullrich & Roser Ges Mit Beschr Method and device for cooling used foundry molding sand
DE2259995A1 (en) * 1972-01-05 1973-07-12 Shell Int Research METHOD FOR DOUBLE BOND ISOMERIZATION OF ALKENES
DE3008538A1 (en) * 1980-03-06 1981-09-10 Uhde Gmbh, 4600 Dortmund Cooler for hot foundry moulding sand - which travels along vibrating conveyor while being exposed to cooling air and water, and cooler has low total height
DE19925720C1 (en) * 1999-06-07 2000-11-02 Webac Ges Fuer Maschinenbau Mb Used foundry sand regeneration process comprises batch or discontinuous sand cooling and-or moistening and binder addition in a mixing chamber before intermediate storage
WO2010057510A1 (en) * 2008-11-24 2010-05-27 Rwe Power Aktiengesellschaft Method for generating process steam

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1027049A (en) * 1950-10-31 1953-05-06 Device for treating foundry sand
US2778076A (en) * 1952-01-14 1957-01-22 Millard J Bell Means for tempering foundry sand
AT196075B (en) * 1954-10-20 1958-02-25 Fischer Ag Georg Process for cooling molding sand for foundries

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1027049A (en) * 1950-10-31 1953-05-06 Device for treating foundry sand
US2778076A (en) * 1952-01-14 1957-01-22 Millard J Bell Means for tempering foundry sand
AT196075B (en) * 1954-10-20 1958-02-25 Fischer Ag Georg Process for cooling molding sand for foundries

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1196818B (en) * 1961-10-30 1965-07-15 Nat Engineering Company Of Can Device for cooling coarse masses, especially foundry sand
DE1245047B (en) * 1962-04-18 1967-07-20 Ullrich & Roser Ges Mit Beschr Method and device for cooling used foundry molding sand
DE2259995A1 (en) * 1972-01-05 1973-07-12 Shell Int Research METHOD FOR DOUBLE BOND ISOMERIZATION OF ALKENES
DE3008538A1 (en) * 1980-03-06 1981-09-10 Uhde Gmbh, 4600 Dortmund Cooler for hot foundry moulding sand - which travels along vibrating conveyor while being exposed to cooling air and water, and cooler has low total height
DE19925720C1 (en) * 1999-06-07 2000-11-02 Webac Ges Fuer Maschinenbau Mb Used foundry sand regeneration process comprises batch or discontinuous sand cooling and-or moistening and binder addition in a mixing chamber before intermediate storage
WO2010057510A1 (en) * 2008-11-24 2010-05-27 Rwe Power Aktiengesellschaft Method for generating process steam

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