EP3117928A1 - Method and device which moulding compound to be processed is kept moist during the production of cores - Google Patents

Method and device which moulding compound to be processed is kept moist during the production of cores Download PDF

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Publication number
EP3117928A1
EP3117928A1 EP16184969.0A EP16184969A EP3117928A1 EP 3117928 A1 EP3117928 A1 EP 3117928A1 EP 16184969 A EP16184969 A EP 16184969A EP 3117928 A1 EP3117928 A1 EP 3117928A1
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EP
European Patent Office
Prior art keywords
mixture
storage unit
mixing device
sand storage
mixing
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EP16184969.0A
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German (de)
French (fr)
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EP3117928B1 (en
Inventor
Rudolf Wintgens
Martin Faller
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Laempe Mossner Sinto GmbH
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Laempe Mossner Sinto GmbH
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Application filed by Laempe Mossner Sinto GmbH filed Critical Laempe Mossner Sinto GmbH
Priority to PL16184969T priority Critical patent/PL3117928T3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C19/00—Components or accessories for moulding machines
    • 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
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles

Definitions

  • the invention relates to a method for producing molds or cores, in particular for foundry purposes, wherein molding material or sand and at least one binder which is at least predominantly inorganic, water-soluble and / or hygroscopic, are mixed by means of a mixing device and wherein this mixture by means of a feeder at least one sand storage unit is fed to a core or molding machine.
  • the invention further relates to an apparatus for producing molds or cores, in particular for foundry purposes, with a mixing device for mixing molding material or sand and a binder which is at least predominantly inorganic, water-soluble and / or hygroscopic, and with a feed device for conveying the mixture to a sand storage unit of a core or molding machine.
  • the method defined at the outset provides that the mixture-free region of the mixing device is at least temporarily and / or the mixture-free region of the feed device located between the mixing device and the core or shape production device and / or the mixture-free region of the sand storage unit behind the feed device and before the core or molding device moistened or kept moist.
  • moistening sets in the areas mentioned a high humidity, which can prevent or reduce evaporation or leakage of moisture from the mixture.
  • the mixture can not fully or partially cure or dry or form encrustations. Soiling of the mixing device and / or the feeder and / or the sand storage unit, but also the core or mold manufacturing device, so can reduced and / or the necessary cleaning intervals are extended. This fact can in particular have a positive effect on the productivity of the core and mold production process and, in addition, the cleaning intervals can be extended and the cleaning costs can be reduced.
  • the mixture-free region of the mixing device is at least temporarily moistened or kept moist, at least during the mixing process. Especially by the mixing process moisture could escape from the mixture in the mixture-free area. By moistening the mixture-free area can be easily prevented that moisture exits the mixture, these dries, adheres to parts of the mixing device and dirty the mixing device.
  • evaporation or escape of moisture from the mixture is reduced or prevented by keeping the humidity above the mixture by supplying moisture, in particular to about 70% to 100%, preferably to about 80% to 100 % is kept.
  • Such humidity values minimize the moisture gradient between the mixture and the air surrounding the mixture, thereby largely preventing the release of moisture from the mixture to the air by evaporation and concomitant undesired curing of the mixture.
  • the serving for wetting liquid or serving for wetting water by means of ultrasound is atomized to a hoverable aerosol and the mixing device and / or the feeder and / or the sand supply unit is supplied.
  • the aerosol which can be suspended has such small liquid constituents that they can evaporate directly and increase the humidity without first condensing and without condensing as condensate in the mixing device and / or the feed device and / or the sand storage unit.
  • the size of the liquid particles generated by ultrasound may be on the order of 0.01 mm or less. At the same time a sufficiently high humidity is achieved, which can prevent the drying of the sand-binder mixture. Both the mixing process as well as the supply and the storage of the Sandbindergemisch can be done reliably.
  • the aerosol or the quantity of this aerosol which can be aerated and the size of the volumetric flow provided with the aerosol can be adjusted by changing the pulse packets delivered by the ultrasound transmitter (s) and / or by changing the voltage of the ultrasound transmitter (s).
  • the amount of aerosol which can be aerated, with which the mixing device and / or the sand storage unit is moistened can be adapted to the existing conditions such as atmospheric humidity, size of the volume to be humidified and ambient temperature.
  • a particularly expedient embodiment of the method according to the invention can be that the suspended aerosol is formed and fed via one or more lines of the mixing device and / or the feed device and / or the sand storage unit.
  • the generation of the aerosol thus takes place outside the mixing, feeding and / or the sand storage unit.
  • For the production of the aerosol so no additional space is needed in the mixing, feeding and / or the sand storage unit. Nevertheless, it is possible to provide a sufficiently high humidity, so that drying of the sand-binder mixture can be avoided, but without supplying too much liquid, whereby in particular the binder could possibly be washed out or dissolved.
  • the device defined at the outset is characterized in that a humidifying device acting on the inside or opening into the interior of the mixing device and / or on the supply device and / or on the sand storage unit is provided.
  • a humidifying device acting on the inside or opening into the interior of the mixing device and / or on the supply device and / or on the sand storage unit is provided.
  • the humidifier With the help of the humidifier, the generating and the Maintenance of the desired humidity can be achieved in a particularly simple manner, so that the risk of drying may be reduced due to moisture loss of the mixture in the mixing device and / or in the feeder and / or in the sand storage unit. This can favorably reduce the contamination of the mixing device and / or the feed device and / or the sand storage unit, but also of the downstream core or mold production device.
  • the moistening device has at least one ultrasound transmitter in the form of an ultrasonic atomizer for water or for a liquid containing in particular water.
  • the invention thus makes use of the fact or knowledge that with ultrasonic atomizers water or a liquid containing water can be atomized such that the individual droplets can be smaller than 20 thousandths of a millimeter or even smaller than 10 thousandths of a millimeter, so that they pass into humidity and do not or hardly precipitate as moisture film on parts of the mixing device and / or the feeder and / or the sand storage unit.
  • the / the ultrasonic atomizer and a corresponding liquid reservoir spatially separated from the mixing device and / or from the feeder and / or from the sand storage unit arranged and with the / to be moistened area (s) via at least one tube or hose line is / are connected.
  • the floating aerosol formed by an ultrasonic atomizer from water or from a liquid containing water can be easily transported over several meters through such a conduit to provide at the desired location sufficiently humid air, drying the mixture of sand or molding material and Binder prevents in particular in the mixing device itself, the feeder and / or the sand storage unit, but without too much wet this mixture.
  • the liquid reservoir with the / the ultrasound generator (s) can thus advantageously at a location of the forming or core shooter or be placed near this machine, where there is enough space for it.
  • the mixing device, the feed device and the sand storage unit are each connected to the moistening device via a pipe or hose line.
  • pipe or hose lines present separately for the individual device areas, moist air can be introduced individually to the individual process steps into the mixing device, the feed device and / or the sand storage unit.
  • a development of the device according to the invention can provide that the number of ultrasonic atomizers at least equal to the number of tube or hose lines and per tube or hose at least one ultrasonic atomizer is provided.
  • the number of ultrasonic atomizers at least equal to the number of tube or hose lines and per tube or hose at least one ultrasonic atomizer is provided.
  • at least one ultrasonic atomizer per pipeline it is possible that even with different humidity values in the areas to be moistened, a sufficient amount of liquid can be atomized and fed to the respective areas in order to prevent drying and crusting of the mixture.
  • a fan or compressed gas connection is arranged in particular above the liquid surface in the liquid reservoir.
  • the aerosol could flow, especially with relatively short lines due to its own pressure to the mixing device and / or feeder and / or sand storage unit, but a fan or a compressed gas connection can improve this flow or even a greater distance of the ultrasonic atomizer of the allow humid air to be supplied areas of the device.
  • height differences between the ultrasonic atomizer and the said areas of the device at the core shooting device can be overcome by a fan and / or a compressed gas connection.
  • the aerosol can also be conveyed upwards, so that the ultrasonic atomizer can also be arranged deeper with the liquid reservoir, where as a rule there is sufficient space therefor.
  • the aerosol can also be conveyed upwards, so that the ultrasonic atomizer can also be arranged deeper with the liquid reservoir, where as a rule there is sufficient space therefor.
  • a possibly occurring condensate on the inner walls of the tube or hose in which the aerosol is transported can flow back down into the liquid reservoir.
  • a modified embodiment of the invention may provide that the feed device is at least one movable transport bucket.
  • a movable transport bucket as a feeder, it is possible to transport the sand-binder mixture from the mixing device to the sand storage unit of the core or mold manufacturing device over longer distances.
  • the single figure shows a schematic representation a longitudinal section of a mixing device, a feeding device and a sand storage unit with pending Kern- or Formher einsvorraum and a moistening device with two Ultraschallzerstäubern and liquid reservoir and three supply lines, one of which extends to the mixing device, one to the feeder and one to the sand storage unit.
  • a generally designated 1 apparatus for producing molds or cores in the embodiment for the production of cores for foundry purposes, has a mixing device 20 with a mixing tool 22 for producing a mixture M through Mixing molding material or sand and a binder, a feed device 30 for forwarding the mixture M to a sand storage unit 40 with a closure device 42 and a core or molding device 50 on.
  • a moistening device 2 For moistening the air in the device 1 is a moistening device 2 with two Ultraschallzerstäubern 60 for water or for a particular water-containing liquid 71 and a liquid reservoir 70. With the help of these Ultraschallzerstäuber 60, the liquid 71 can be atomized to a fine aerosol. This aerosol is indicated by the two cloud fungi 61 in the interior of the liquid reservoir 70 in the figure.
  • An embodiment of the device can also provide that three ultrasonic atomizers 60 are provided, one of which is assigned to one of the three pipes 81, 82 and 83, so so for the liquid supply in the areas to be humidified per pipe 81, 82 and 83 at least one ultrasonic atomizer is available.
  • the amount of moisture for each area can be individually sized and fed.
  • the moistening device 2 with the ultrasonic atomizers 60 and the liquid reservoir 70 is spatially separated from the mixing device 20, the feed device 30 and the sand storage unit 40, but connected to the areas to be moistened via pipelines 81, 82 and 83 are, which extend directly from the liquid reservoir 70 in said areas of the device 1 and there supply mixture-free areas 21, 31 and 41 with moist air.
  • the mixing device 20 but also the feed unit 30 and the sand storage unit 40 at least temporarily each have a mixture-free region 31 and 41.
  • a fan 90 and a compressed gas connection 10 can be seen. Either the fan 90 or the compressed gas port 10, or both, are preferably used to transport and transport the aerosol prepared by the ultrasonic atomizers 60 via the pipelines 81, 82 and 83 to the mixing device 20, the feed device 30 and the sand storage unit 40.
  • a modified, not shown embodiment of the device 1 may provide that the feeder 30 is at least one transport bucket that can be moved, for example by means of a railroad or with a crane between the mixing device 20 and sand storage unit 40. In particular, for bridging larger distances between the mixing device 20 and the sand storage unit 40, this may be favorable.
  • the mixture M is mixed by means of a mixing device 20 and fed by means of a feeder 30 at least one sand storage unit 40 of a core or molding device 50, wherein the mixture-free Area 21 of the mixing device 20 at least temporarily and / or the present between the mixing device 20 and the core or molding device 50 feeder 30 and / or the sand storage unit 40 behind the feeder 30 and before the core or molding device 50 by means of a liquid 71 moistened or moist is held, wherein the liquid to be humidified 71 by at least one Ultrasonic atomizer 60 is atomized into a hoverable aerosol and the mixing device 20 and / or the feeder 30 and / or the sand storage unit 40 via pipes 81, 82 and 83 is supplied.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mold Materials And Core Materials (AREA)
  • Casting Devices For Molds (AREA)
  • Jigging Conveyors (AREA)
  • Nozzles (AREA)

Abstract

Zur Herstellung von Formen oder Kernen für Gießereizwecke aus einer Mischung (M) aus Formstoff oder Sand und wenigstens einem Binder wird die Mischung (M) mittels einer Mischvorrichtung (20) gemischt und mit Hilfe einer Zuführeinrichtung (30) wenigstens einer Sandvorratseinheit (40) einer Kern- oder Formherstellungsvorrichtung (50) zugeführt, wobei der mischungsfreie Bereich (21) der Mischvorrichtung (20) wenigstens zeitweise und/oder die zwischen der Mischvorrichtung (20) und der Kern- oder Formherstellungsvorrichtung (50) befindliche Zuführeinrichtung (30) und/oder die Sandvorratseinheit (40) hinter der Zuführeinrichtung (30) und vor der Kern- oder Formherstellungsvorrichtung (50) mittels einer Flüssigkeit (71) befeuchtet oder feucht gehalten wird, wobei die zum befeuchten dienende Flüssigkeit (71) durch wenigstens einen Ultraschallzerstäuber (60) zu einem schwebefähigen Aerosol zerstäubt und der Mischvorrichtung (20) und/oder der Zuführeinrichtung (30) und/oder der Sandvorratseinheit (40) über Rohrleitungen (81, 82, 83) zugeführt wird.In order to produce molds or cores for foundry purposes from a mixture (M) of molding material or sand and at least one binder, the mixture (M) is mixed by means of a mixing device (20) and by means of a feed device (30) at least one sand storage unit (40) Fed to the core or mold-making device (50), wherein the mixture-free region (21) of the mixing device (20) at least temporarily and / or between the mixing device (20) and the core or Formherstellungsvorrichtung (50) located feed device (30) and / or the sand storage unit (40) behind the feeder (30) and before the core or molding device (50) by means of a liquid (71) is moistened or kept moist, wherein the liquid to be humidified (71) by at least one ultrasonic atomizer (60) atomized a suspendable aerosol and the mixing device (20) and / or the feeder (30) and / or the Sandv orratseinheit (40) via pipes (81, 82, 83) is supplied.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Formen oder Kernen, insbesondere für Gießereizwecke, wobei Formstoff oder Sand und wenigstens ein Binder, der zumindest überwiegend anorganisch, wasserlöslich und/oder hygroskopisch ist, mittels einer Mischvorrichtung gemischt werden und wobei diese Mischung mit Hilfe einer Zuführeinrichtung wenigstens einer Sandvorratseinheit einer Kern- oder Formherstellungsvorrichtung zugeführt wird.The invention relates to a method for producing molds or cores, in particular for foundry purposes, wherein molding material or sand and at least one binder which is at least predominantly inorganic, water-soluble and / or hygroscopic, are mixed by means of a mixing device and wherein this mixture by means of a feeder at least one sand storage unit is fed to a core or molding machine.

Die Erfindung betrifft ferner eine Vorrichtung zur Herstellung von Formen oder Kernen, insbesondere für Gießereizwecke, mit einer Mischvorrichtung zum Vermischen von Formstoff oder Sand und einem Binder, der wenigstens überwiegend anorganisch, wasserlöslich und/oder hygroskopisch ist, und mit einer Zuführeinrichtung zum Weiterleiten der Mischung zu einer Sandvorratseinheit einer Kern- oder Formherstellungsvorrichtung.The invention further relates to an apparatus for producing molds or cores, in particular for foundry purposes, with a mixing device for mixing molding material or sand and a binder which is at least predominantly inorganic, water-soluble and / or hygroscopic, and with a feed device for conveying the mixture to a sand storage unit of a core or molding machine.

Ein derartiges Verfahren und eine vergleichbare Vorrichtung sind aus der Praxis bekannt und haben sich bewährt.Such a method and a comparable device are known from practice and have proven themselves.

Es kann jedoch passieren, dass während des Mischvorgangs und auch danach in dem Binder ursprünglich enthaltene Feuchtigkeit austritt, so dass die Mischung stellenweise antrocknet und verkrustet, was einerseits die Weiterbeförderung und Zuführung der Mischung zur Kern- oder Formherstellungsvorrichtung erschweren und andererseits die Mischvorrichtung sowie die nachgelagerte Zuführeinrichtung und die Sandvorratseinheit verschmutzen lassen kann. Auch die Formherstellungsvorrichtung selbst kann durch verklumpte Mischung verstopft werden. Ausschuss, Produktionsstopp und ein hoher Reinigungsaufwand der gesamten Anlage - von der Mischvorrichtung bis hin zur Formherstellungsvorrichtung - können die Folge sein.However, it may happen that during the mixing process and also afterwards in the binder originally contained moisture escapes, so that the mixture in places Dries and encrusted, which on the one hand complicate the further transport and feeding of the mixture to the core or mold manufacturing device and on the other hand can cause contamination of the mixing device and the downstream feeder and the sand storage unit. Also, the mold-making device itself can be clogged by lumpy mixture. Scrap, production stoppage and a high cleaning effort of the entire plant - from the mixing device to the molding machine - can be the result.

Bisher werden diese Probleme durch kurze Reinigungsintervalle, durch Kühlung der Mischung oder gegebenenfalls durch eine Erhöhung des Bindemittelanteils, also durch zusätzlichen Aufwand reduziert werden.So far, these problems are reduced by short cleaning intervals, by cooling the mixture or optionally by increasing the binder content, ie by additional effort.

Es besteht deshalb die Aufgabe, ein Verfahren und auch eine Vorrichtung der eingangs genannten Art zu schaffen, bei welcher ein frühzeitiges Antrocknen und Verkrusten der Mischung und die damit einhergehende Verschmutzung der Mischvorrichtung und/oder der Zuführeinrichtung und/oder Sandvorratseinheit weitgehend vermieden wird.It is therefore the object to provide a method and a device of the type mentioned, in which an early drying and crusting of the mixture and the associated contamination of the mixing device and / or the feeder and / or sand storage unit is largely avoided.

Zur Lösung dieser Aufgabe sieht das eingangs definierte Verfahren vor, dass der mischungsfreie Bereich der Mischvorrichtung wenigstens zeitweise und/oder der zwischen der Mischvorrichtung und der Kern- oder Formherstellungsvorrichtung befindliche mischungsfreie Bereich der Zuführeinrichtung und/oder der mischungsfreie Bereich der Sandvorratseinheit hinter der Zuführeinrichtung und vor der Kern- oder Formherstellungsvorrichtung befeuchtet oder feucht gehalten werden. Durch das Befeuchten stellt sich in den genannten Bereichen eine hohe Luftfeuchtigkeit ein, die ein Verdunsten oder Austreten von Feuchtigkeit aus der Mischung unterbinden oder vermindern kann. Somit kann die Mischung weder vollständig noch teilweise aushärten oder antrocknen oder Verkrustungen bilden. Verschmutzungen der Mischvorrichtung und/oder der Zuführeinrichtung und/oder der Sandvorratseinheit, aber auch der Kern- oder Formherstellungsvorrichtung, können also vermindert und/oder die notwendigen Reinigungsintervalle verlängert werden. Dieser Umstand kann sich insbesondere positiv auf die Produktivität des Kern- und Formherstellungsprozesses auswirken und darüber hinaus können die Reinigungsintervalle verlängert und die Reinigungskosten gesenkt werden.To achieve this object, the method defined at the outset provides that the mixture-free region of the mixing device is at least temporarily and / or the mixture-free region of the feed device located between the mixing device and the core or shape production device and / or the mixture-free region of the sand storage unit behind the feed device and before the core or molding device moistened or kept moist. By moistening sets in the areas mentioned a high humidity, which can prevent or reduce evaporation or leakage of moisture from the mixture. Thus, the mixture can not fully or partially cure or dry or form encrustations. Soiling of the mixing device and / or the feeder and / or the sand storage unit, but also the core or mold manufacturing device, so can reduced and / or the necessary cleaning intervals are extended. This fact can in particular have a positive effect on the productivity of the core and mold production process and, in addition, the cleaning intervals can be extended and the cleaning costs can be reduced.

Besonders günstig ist es dabei, wenn der mischungsfreie Bereich der Mischvorrichtung zumindest während des Mischvorgangs wenigstens zeitweise befeuchtet oder feuchtgehalten wird. Vor allem durch den Mischvorgang könnte Feuchtigkeit aus der Mischung in den mischungsfreien Bereich austreten. Durch die Befeuchtung des mischungsfreien Bereichs kann in einfacher Weise verhindert werden, dass Feuchtigkeit aus der Mischung austritt, diese antrocknet, sich an Teilen der Mischvorrichtung festsetzt und die Mischvorrichtung verschmutzt.It is particularly favorable if the mixture-free region of the mixing device is at least temporarily moistened or kept moist, at least during the mixing process. Especially by the mixing process moisture could escape from the mixture in the mixture-free area. By moistening the mixture-free area can be easily prevented that moisture exits the mixture, these dries, adheres to parts of the mixing device and dirty the mixing device.

Außerdem kann es günstig sein, wenn ein Verdunsten oder Austreten von Feuchtigkeit aus der Mischung dadurch vermindert oder unterbunden wird, dass oberhalb der Mischung durch Zuführung von Feuchtigkeit die Luftfeuchtigkeit hochgehalten, insbesondere auf etwa 70 % bis 100 %, vorzugsweise auf etwa 80 % bis 100 % gehalten wird. Solche Luftfeuchtigkeitswerte minimieren den Feuchtigkeitsgradienten zwischen der Mischung und der die Mischung umgebenden Luft, wodurch eine Abgabe von Feuchtigkeit aus der Mischung an die Luft durch Verdunsten und ein damit einhergehendes, ungewolltes Aushärten der Mischung weitestgehend verhindert werden kann.In addition, it may be favorable if evaporation or escape of moisture from the mixture is reduced or prevented by keeping the humidity above the mixture by supplying moisture, in particular to about 70% to 100%, preferably to about 80% to 100 % is kept. Such humidity values minimize the moisture gradient between the mixture and the air surrounding the mixture, thereby largely preventing the release of moisture from the mixture to the air by evaporation and concomitant undesired curing of the mixture.

Dabei ist es möglich, dass die zum Befeuchten dienende Flüssigkeit oder das zum Befeuchten dienende Wasser mittels Ultraschall zu einem schwebefähigen Aerosol zerstäubt und der Mischvorrichtung und/oder der Zuführeinrichtung und/oder der Sandvorratseinheit zugeführt wird. Das schwebfähige Aerosol weist dabei derart kleine Flüssigkeitsbestandteile auf, dass diese direkt verdunsten und die Luftfeuchtigkeit steigern können, ohne zuvor zu kondensieren und ohne sich als Kondensat in der Mischvorrichtung und/oder der Zuführeinrichtung und/oder der Sandvorratseinheit niederschlagen. Die Größe der durch Ultraschall erzeugten Flüssigkeitsteilchen kann in der Größenordnung von 0,01 mm oder darunter liegen. Gleichzeitig wird eine ausreichend hohe Luftfeuchtigkeit erzielt, die das Austrocknen des Sand-Binder-Gemischs verhindern kann. Sowohl der Mischvorgang als auch die Zuführung und die Bevorratung des Sandbindergemischs können prozesssicher erfolgen.It is possible that the serving for wetting liquid or serving for wetting water by means of ultrasound is atomized to a hoverable aerosol and the mixing device and / or the feeder and / or the sand supply unit is supplied. In this case, the aerosol which can be suspended has such small liquid constituents that they can evaporate directly and increase the humidity without first condensing and without condensing as condensate in the mixing device and / or the feed device and / or the sand storage unit. The size of the liquid particles generated by ultrasound may be on the order of 0.01 mm or less. At the same time a sufficiently high humidity is achieved, which can prevent the drying of the sand-binder mixture. Both the mixing process as well as the supply and the storage of the Sandbindergemisch can be done reliably.

Das Aerosol beziehungsweise die Menge dieses schwebfähigen Aerosols und die Größe des mit dem Aerosol versehenen Volumenstroms kann durch Veränderung der von dem/den Ultraschallgeber(n) abgegebenen Pulspakete und/oder durch Veränderung der Spannung des/der Ultraschallgeber eingestellt werden. Auf diese Weise lässt sich die Menge des schwebfähigen Aerosols, womit die die Mischvorrichtung und/oder die Sandvorratseinheit befeuchtet wird, an die vorhandenen Verhältnisse wie Atmosphärenfeuchtigkeit, Größe des zu befeuchtenden Volumens und Umgebungstemperatur anpassen.The aerosol or the quantity of this aerosol which can be aerated and the size of the volumetric flow provided with the aerosol can be adjusted by changing the pulse packets delivered by the ultrasound transmitter (s) and / or by changing the voltage of the ultrasound transmitter (s). In this way, the amount of aerosol which can be aerated, with which the mixing device and / or the sand storage unit is moistened, can be adapted to the existing conditions such as atmospheric humidity, size of the volume to be humidified and ambient temperature.

Eine besonders zweckmäßige Ausgestaltung des erfindungsgemäßen Verfahrens kann darin bestehen, dass das schwebefähige Aerosol gebildet und über eine oder mehrere Leitungen der Mischvorrichtung und/oder der Zuführeinrichtung und/oder der Sandvorratseinheit zugeleitet wird. Die Erzeugung des Aerosols geschieht somit außerhalb der Misch-, Zuführ- und/oder der Sandvorratseinheit. Für die Herstellung des Aerosols wird also in der Misch-, Zuführ- und/oder der Sandvorratseinheit kein zusätzlicher Bauraum benötigt. Dennoch ist es möglich, eine ausreichend hohe Luftfeuchtigkeit bereitzustellen, so dass ein Antrocknen des Sand-Binder-Gemisches vermieden werden kann, ohne aber zuviel Flüssigkeit zuzuführen, wodurch insbesondere der Binder eventuell ausgeschwemmt oder gelöst werden könnte.A particularly expedient embodiment of the method according to the invention can be that the suspended aerosol is formed and fed via one or more lines of the mixing device and / or the feed device and / or the sand storage unit. The generation of the aerosol thus takes place outside the mixing, feeding and / or the sand storage unit. For the production of the aerosol so no additional space is needed in the mixing, feeding and / or the sand storage unit. Nevertheless, it is possible to provide a sufficiently high humidity, so that drying of the sand-binder mixture can be avoided, but without supplying too much liquid, whereby in particular the binder could possibly be washed out or dissolved.

Zur Lösung der Aufgabe ist die eingangs definierte Vorrichtung dadurch gekennzeichnet, dass an der Mischvorrichtung und/oder an der Zuführeinrichtung und/oder an der Sandvorratseinheit eine deren Inneres beaufschlagende oder in deren Inneres mündende Befeuchtungseinrichtung vorgesehen ist. Mit Hilfe der Befeuchtungseinrichtung kann das Erzeugen und die Aufrechterhaltung der gewünschten Luftfeuchtigkeit in besonders einfacher Weise erreicht werden, so dass das Risiko eines Antrocknens aufgrund von Feuchtigkeitsverlust der Mischung in der Mischvorrichtung und/oder in der Zuführeinrichtung und/oder in der Sandvorratseinheit vermindert sein kann. Dies kann in günstiger Weise die Verschmutzung der Mischvorrichtung und/oder der Zuführeinrichtung und/oder der Sandvorratseinheit, aber auch der nachgelagerten Kern- oder Formherstellungsvorrichtung, vermindern.To achieve the object, the device defined at the outset is characterized in that a humidifying device acting on the inside or opening into the interior of the mixing device and / or on the supply device and / or on the sand storage unit is provided. With the help of the humidifier, the generating and the Maintenance of the desired humidity can be achieved in a particularly simple manner, so that the risk of drying may be reduced due to moisture loss of the mixture in the mixing device and / or in the feeder and / or in the sand storage unit. This can favorably reduce the contamination of the mixing device and / or the feed device and / or the sand storage unit, but also of the downstream core or mold production device.

Dabei ist es möglich, dass die Befeuchtungseinrichtung wenigstens einen Ultraschallgeber in Form eines Ultraschallzerstäubers für Wasser oder für eine insbesondere Wasser enthaltende Flüssigkeit aufweist. Die Erfindung macht sich also die Tatsache oder Erkenntnis zunutze, dass mit Ultraschallzerstäubern Wasser oder eine Wasser enthaltende Flüssigkeit derart zerstäubt werden kann, dass die einzelnen Tröpfchen kleiner als 20 Tausendstel Millimeter oder sogar kleiner als 10 Tausendstel Millimeter sein können, so dass sie in Luftfeuchtigkeit übergehen und sich nicht oder kaum als Feuchtigkeitsfilm auf Teilen der Mischvorrichtung und/oder der Zuführeinrichtung und/oder der Sandvorratseinheit niederschlagen.It is possible that the moistening device has at least one ultrasound transmitter in the form of an ultrasonic atomizer for water or for a liquid containing in particular water. The invention thus makes use of the fact or knowledge that with ultrasonic atomizers water or a liquid containing water can be atomized such that the individual droplets can be smaller than 20 thousandths of a millimeter or even smaller than 10 thousandths of a millimeter, so that they pass into humidity and do not or hardly precipitate as moisture film on parts of the mixing device and / or the feeder and / or the sand storage unit.

Dabei ist es besonders günstig, wenn der/die Ultraschallzerstäuber und ein dazu gehörende Flüssigkeitsreservoir räumlich von der Mischvorrichtung und/oder von der Zuführeinrichtung und/oder von der Sandvorratseinheit getrennt angeordnet und mit dem/den zu befeuchtenden Bereich(en) über zumindest eine Rohr- oder Schlauchleitung verbunden ist/sind. Versuche haben gezeigt, dass das durch einen Ultraschallzerstäuber aus Wasser oder aus einer wasserhaltigen Flüssigkeit gebildete schwebende Aerosol problemlos über mehrere Meter durch eine solche Leitung transportiert werden kann, um an gewünschter Stelle ausreichend feuchte Luft bereitzustellen, die ein Eintrocknen des Gemisches aus Sand oder Formstoff und Binder insbesondere in der Mischvorrichtung selbst, der Zuführeinrichtung und/oder der Sandvorratseinheit verhindert, ohne diese Mischung aber zu sehr zu durchnässen. Das Flüssigkeitsreservoir mit dem/den Ultraschallgeber(n) kann so in vorteilhafter Weise an einer Stelle der Form- oder Kernschießmaschine beziehungsweise nahe dieser Maschine angeordnet werden, wo ausreichend Platz dafür vorhanden ist.It is particularly advantageous if the / the ultrasonic atomizer and a corresponding liquid reservoir spatially separated from the mixing device and / or from the feeder and / or from the sand storage unit arranged and with the / to be moistened area (s) via at least one tube or hose line is / are connected. Experiments have shown that the floating aerosol formed by an ultrasonic atomizer from water or from a liquid containing water can be easily transported over several meters through such a conduit to provide at the desired location sufficiently humid air, drying the mixture of sand or molding material and Binder prevents in particular in the mixing device itself, the feeder and / or the sand storage unit, but without too much wet this mixture. The liquid reservoir with the / the ultrasound generator (s) can thus advantageously at a location of the forming or core shooter or be placed near this machine, where there is enough space for it.

Besonders zweckmäßig dabei ist es, wenn die Mischvorrichtung, die Zuführeinrichtung und die Sandvorratseinheit jeweils über eine Rohr- oder Schlauchleitung mit der Befeuchtungseinrichtung verbunden sind. Mit separat für die einzelnen Vorrichtungsbereiche vorhandenen Rohr- oder Schlauchleitungen kann feuchte Luft individuell auf die einzelnen Prozessschritte abgestimmt in die Mischvorrichtung, die Zuführeinrichtung und/oder die Sandvorratseinheit eingeleitet werden. So kann mit noch größerer Sicherheit verhindert werden, dass das Sandbindergemisch in einem der vorgenannten Bereiche Feuchtigkeit verliert, antrocknet und diese verschmutzt.It is particularly expedient in this case if the mixing device, the feed device and the sand storage unit are each connected to the moistening device via a pipe or hose line. With pipe or hose lines present separately for the individual device areas, moist air can be introduced individually to the individual process steps into the mixing device, the feed device and / or the sand storage unit. Thus it can be prevented with even greater certainty that the Sandbindergemisch loses moisture in one of the aforementioned areas, dries and dirty them.

Eine erfindungsgemäße Weiterbildung der Vorrichtung kann vorsehen, dass die Anzahl der Ultraschallzerstäuber mindestens der Anzahl der Rohr- oder Schlauchleitungen entspricht und je Rohr- oder Schlauchleitung wenigstens ein Ultraschallzerstäuber vorgesehen ist. Mit wenigsten einem Ultraschallzerstäuber je Rohrleitung ist es möglich, dass selbst bei unterschiedlichen Luftfeuchtigkeitswerten in den zu befeuchtenden Bereichen eine ausreichende Menge an Flüssigkeit zerstäubt und den jeweiligen Bereichen zugeführt werden kann, um ein Austrocknen und Verkrusten der Mischung zu verhindern.A development of the device according to the invention can provide that the number of ultrasonic atomizers at least equal to the number of tube or hose lines and per tube or hose at least one ultrasonic atomizer is provided. With at least one ultrasonic atomizer per pipeline, it is possible that even with different humidity values in the areas to be moistened, a sufficient amount of liquid can be atomized and fed to the respective areas in order to prevent drying and crusting of the mixture.

Außerdem kann es günstig sein, wenn zur Beförderung der Feuchtigkeit oder des Aerosols von dem/den Ultraschallzerstäuber(n) zu der Mischvorrichtung und/oder Zuführeinrichtung und/oder Sandvorratseinheit ein Ventilator oder ein Druckgasanschluss insbesondere oberhalb der Flüssigkeitsoberfläche im Flüssigkeitsreservoir angeordnet ist. Das Aerosol könnte zwar vor allem bei relativ kurzen Leitungen aufgrund seines Eigendrucks zu der Mischvorrichtung und/oder Zuführeinrichtung und/oder Sandvorratseinheit strömen, jedoch kann ein Ventilator oder ein Druckgasanschluss diese Strömung verbessern beziehungsweise auch einen größeren Abstand des Ultraschallzerstäubers von den mit feuchter Luft zu versorgenden Bereichen der Vorrichtung ermöglichen. Ferner können durch einen Ventilator und/oder einen Druckgasanschluss Höhenunterschiede zwischen dem Ultraschallzerstäuber und der besagten Bereiche der Vorrichtung an der Kernschießeinrichtung überwunden werden. Vor allem kann das Aerosol auch nach oben gefördert werden, so dass der Ultraschallzerstäuber mit dem Flüssigkeitsreservoir auch tiefer angeordnet sein kann, wo in der Regel genügend Platz dafür vorhanden ist. Außerdem ist bei einer solchen Anordnung von Vorteil, dass ein eventuell auftretendes Kondensat an den inneren Wandungen des Rohres oder des Schlauches, worin das Aerosol transportiert wird, nach unten in das Flüssigkeitsreservoir zurückfließen kann.In addition, it can be favorable if, for transporting the moisture or aerosol from the ultrasonic atomizer (s) to the mixing device and / or feed device and / or sand storage unit, a fan or compressed gas connection is arranged in particular above the liquid surface in the liquid reservoir. Although the aerosol could flow, especially with relatively short lines due to its own pressure to the mixing device and / or feeder and / or sand storage unit, but a fan or a compressed gas connection can improve this flow or even a greater distance of the ultrasonic atomizer of the allow humid air to be supplied areas of the device. Furthermore, height differences between the ultrasonic atomizer and the said areas of the device at the core shooting device can be overcome by a fan and / or a compressed gas connection. Above all, the aerosol can also be conveyed upwards, so that the ultrasonic atomizer can also be arranged deeper with the liquid reservoir, where as a rule there is sufficient space therefor. In addition, in such an arrangement is advantageous that a possibly occurring condensate on the inner walls of the tube or hose in which the aerosol is transported, can flow back down into the liquid reservoir.

Eine abgewandelte Ausführungsform der Erfindung kann vorsehen, dass die Zuführeinrichtung wenigstens ein beweglicher Transportkübel ist. Mit einem beweglichen Transportkübel als Zuführeinrichtung ist es möglich, das Sand-Binder-Gemisch von der Mischvorrichtung zu der Sandvorratseinheit der Kern- oder Formherstellungsvorrichtung auch über größere Distanzen zu transportieren.A modified embodiment of the invention may provide that the feed device is at least one movable transport bucket. With a movable transport bucket as a feeder, it is possible to transport the sand-binder mixture from the mixing device to the sand storage unit of the core or mold manufacturing device over longer distances.

Nachstehend ist ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher beschrieben. Die einzige Figur zeigt in schematisierter Darstellung
einen Längsschnitt einer Mischvorrichtung, einer Zuführeinrichtung sowie einer Sandvorratseinheit mit anhängiger Kern- oder Formherstellungsvorrichtung sowie eine Befeuchtungseinrichtung mit zwei Ultraschallzerstäubern und Flüssigkeitsreservoir und mit drei Zuführleitungen, von denen eine zu der Mischvorrichtung, eine zu der Zuführeinrichtung und eine zu der Sandvorratseinheit verläuft.An embodiment of the invention will be described in more detail below with reference to the drawing. The single figure shows a schematic representation
a longitudinal section of a mixing device, a feeding device and a sand storage unit with pending Kern- or Formherstellungsvorrichtung and a moistening device with two Ultraschallzerstäubern and liquid reservoir and three supply lines, one of which extends to the mixing device, one to the feeder and one to the sand storage unit.

Eine im Ganzen mit 1 bezeichnete Vorrichtung zur Herstellung von Formen oder Kernen, im Ausführungsbeispiel zur Herstellung von Kernen für Gießereizwecke, weist eine Mischvorrichtung 20 mit einem Mischwerkzeug 22 zum Herstellen einer Mischung M durch Vermischen von Formstoff oder Sand und einem Binder, eine Zuführeinrichtung 30 zum Weiterleiten der Mischung M zu einer Sandvorratseinheit 40 mit einer Verschlusseinrichtung 42 sowie eine Kern- oder Formherstellungsvorrichtung 50 auf.A generally designated 1 apparatus for producing molds or cores, in the embodiment for the production of cores for foundry purposes, has a mixing device 20 with a mixing tool 22 for producing a mixture M through Mixing molding material or sand and a binder, a feed device 30 for forwarding the mixture M to a sand storage unit 40 with a closure device 42 and a core or molding device 50 on.

Zur Befeuchtung der Luft in der Vorrichtung 1 dient eine Befeuchtungseinrichtung 2 mit zwei Ultraschallzerstäubern 60 für Wasser oder für eine insbesondere Wasser enthaltende Flüssigkeit 71 und mit einem Flüssigkeitsreservoir 70. Mit Hilfe dieser Ultraschallzerstäuber 60 kann die Flüssigkeit 71 zu einem feinen Aerosol zerstäubt werden. Dieses Aerosol ist durch die beiden Wolkenpilze 61 im Inneren des Flüssigkeitsreservoirs 70 in der Figur angedeutet.For moistening the air in the device 1 is a moistening device 2 with two Ultraschallzerstäubern 60 for water or for a particular water-containing liquid 71 and a liquid reservoir 70. With the help of these Ultraschallzerstäuber 60, the liquid 71 can be atomized to a fine aerosol. This aerosol is indicated by the two cloud fungi 61 in the interior of the liquid reservoir 70 in the figure.

Eine nicht dargestellte Ausführungsform der Vorrichtung kann aber auch vorsehen, dass drei Ultraschallzerstäuber 60 vorgesehen sind, von denen jeweils einer einer der drei Rohrleitungen 81, 82 und 83 zugeordnet ist, sodass also für die Flüssigkeitszufuhr in die zu befeuchtenden Bereiche je Rohrleitung 81, 82 und 83 wenigstens ein Ultraschallzerstäuber zur Verfügung steht. So kann die Feuchtigkeitsmenge für die einzelnen Bereiche individuell bemessen und zugeführt werden.An embodiment of the device, not shown, but can also provide that three ultrasonic atomizers 60 are provided, one of which is assigned to one of the three pipes 81, 82 and 83, so so for the liquid supply in the areas to be humidified per pipe 81, 82 and 83 at least one ultrasonic atomizer is available. Thus, the amount of moisture for each area can be individually sized and fed.

Anhand der Figur ist auch zu erkennen, dass die Befeuchtungseinrichtung 2 mit den Ultraschallzerstäubern 60 und dem Flüssigkeitsreservoir 70 räumlich von der Mischvorrichtung 20, der Zuführeinrichtung 30 und der Sandvorratseinheit 40 getrennt angeordnet, jedoch mit den zu befeuchtenden Bereichen über Rohrleitungen 81, 82 und 83 verbunden sind, die direkt von dem Flüssigkeitsreservoir 70 in die genannten Bereiche der Vorrichtung 1 hineinreichen und dort mischungsfreie Bereiche 21, 31 und 41 mit feuchter Luft versorgen. Im Ausführungsbeispiel weist nicht nur die Mischvorrichtung 20, sondern auch die Zuführeinheit 30 und die Sandvorratseinheit 40 zumindest zeitweise jeweils einen mischungsfreien Bereich 31 und 41 auf.It can also be seen from the figure that the moistening device 2 with the ultrasonic atomizers 60 and the liquid reservoir 70 is spatially separated from the mixing device 20, the feed device 30 and the sand storage unit 40, but connected to the areas to be moistened via pipelines 81, 82 and 83 are, which extend directly from the liquid reservoir 70 in said areas of the device 1 and there supply mixture-free areas 21, 31 and 41 with moist air. In the exemplary embodiment, not only the mixing device 20, but also the feed unit 30 and the sand storage unit 40 at least temporarily each have a mixture-free region 31 and 41.

Im flüssigkeitsfreien Bereich des Flüssigkeitsreservoirs 70 ist darüber hinaus ein Ventilator 90 sowie ein Druckgasanschluss 10 zu erkennen. Entweder der Ventilator 90 oder der Druckgasanschluss 10 oder bevorzugt beide dienen der Beförderung und des Transports des von den Ultraschallzerstäubern 60 hergestellten Aerosols über die Rohrleitungen 81, 82 und 83 zu der Mischvorrichtung 20, der Zuführeinrichtung 30 und der Sandvorratseinheit 40.In the liquid-free region of the liquid reservoir 70 is In addition, a fan 90 and a compressed gas connection 10 can be seen. Either the fan 90 or the compressed gas port 10, or both, are preferably used to transport and transport the aerosol prepared by the ultrasonic atomizers 60 via the pipelines 81, 82 and 83 to the mixing device 20, the feed device 30 and the sand storage unit 40.

Über die Rohrleitungen 81, 82 und 83 wird ausreichend feuchte Luft oberhalb der Mischung M in die Mischungsvorrichtung 20, die Zuführeinrichtung 30 und die Sandvorratseinheit 40 eingeblasen, so dass die Mischung M in keinem der drei Bereiche der Vorrichtung 1 aushärten und antrocknen kann, was die Verschmutzung der Vorrichtung 1 verhindert und dadurch den unterbrechungsfreien Betrieb der Vorrichtung 1 verbessert sowie die Qualität der erzeugten Sandkerne steigert.Via the pipes 81, 82 and 83, sufficiently humid air above the mixture M is blown into the mixing device 20, the feed device 30 and the sand storage unit 40, so that the mixture M can not harden and dry in any of the three regions of the device 1, which is the Prevent contamination of the device 1 and thereby improves the uninterrupted operation of the device 1 and increases the quality of the sand cores produced.

Eine abgewandelte, nicht näher dargestellte Ausführungsform der Vorrichtung 1 kann vorsehen, dass die Zuführeinrichtung 30 wenigstens ein Transportkübel ist, der beispielsweise mit Hilfe einer Schienenbahn oder mit einem Kran zwischen Mischvorrichtung 20 und Sandvorratseinheit 40 bewegt werden kann. Insbesondere zur Überbrückung größerer Distanzen zwischen der Mischvorrichtung 20 und der Sandvorratseinheit 40 kann dies günstig sein.A modified, not shown embodiment of the device 1 may provide that the feeder 30 is at least one transport bucket that can be moved, for example by means of a railroad or with a crane between the mixing device 20 and sand storage unit 40. In particular, for bridging larger distances between the mixing device 20 and the sand storage unit 40, this may be favorable.

Zur Herstellung von Formen oder Kernen für Gießereizwecke aus einer Mischung M aus Formstoff oder Sand und wenigstens einem Binder wird die Mischung M mittels einer Mischvorrichtung 20 gemischt und mit Hilfe einer Zuführeinrichtung 30 wenigstens einer Sandvorratseinheit 40 einer Kern- oder Formherstellungsvorrichtung 50 zugeführt, wobei der mischungsfreie Bereich 21 der Mischvorrichtung 20 wenigstens zeitweise und/oder die zwischen der Mischvorrichtung 20 und der Kern- oder Formherstellungsvorrichtung 50 befindliche Zuführeinrichtung 30 und/oder die Sandvorratseinheit 40 hinter der Zuführeinrichtung 30 und vor der Kern- oder Formherstellungsvorrichtung 50 mittels einer Flüssigkeit 71 befeuchtet oder feucht gehalten wird, wobei die zum befeuchten dienende Flüssigkeit 71 durch wenigstens einen Ultraschallzerstäuber 60 zu einem schwebefähigen Aerosol zerstäubt und der Mischvorrichtung 20 und/oder der Zuführeinrichtung 30 und/oder der Sandvorratseinheit 40 über Rohrleitungen 81, 82 und 83 zugeführt wird.For the production of molds or cores for foundry purposes from a mixture M of molding material or sand and at least one binder, the mixture M is mixed by means of a mixing device 20 and fed by means of a feeder 30 at least one sand storage unit 40 of a core or molding device 50, wherein the mixture-free Area 21 of the mixing device 20 at least temporarily and / or the present between the mixing device 20 and the core or molding device 50 feeder 30 and / or the sand storage unit 40 behind the feeder 30 and before the core or molding device 50 by means of a liquid 71 moistened or moist is held, wherein the liquid to be humidified 71 by at least one Ultrasonic atomizer 60 is atomized into a hoverable aerosol and the mixing device 20 and / or the feeder 30 and / or the sand storage unit 40 via pipes 81, 82 and 83 is supplied.

Claims (13)

Verfahren zur Herstellung von Formen oder Kernen, insbesondere für Gießereizwecke, wobei Formstoff oder Sand und wenigstens ein Binder, der zumindest überwiegend anorganisch, wasserlöslich und/oder hygroskopisch ist, mittels einer Mischvorrichtung (20) gemischt werden und wobei diese Mischung (M) mit Hilfe einer Zuführeinrichtung (30) wenigstens einer Sandvorratseinheit (40) einer Kern- oder Formherstellungsvorrichtung (50) zugeführt wird, dadurch gekennzeichnet, dass der mischungsfreie Bereich (21) der Mischvorrichtung (20) wenigstens zeitweise und/oder der zwischen der Mischvorrichtung (20) und der Kern- oder Formherstellungsvorrichtung (50) befindliche mischungsfreie Bereich (31) der Zuführeinrichtung (30) und/oder der mischungsfreie Bereich (41) der Sandvorratseinheit (40) hinter der Zuführeinrichtung (30) und vor der Kern- oder Formherstellungsvorrichtung (50) befeuchtet oder feucht gehalten werden.Process for the production of molds or cores, in particular for foundry purposes, wherein molding material or sand and at least one binder which is at least predominantly inorganic, water-soluble and / or hygroscopic, are mixed by means of a mixing device (20) and this mixture (M) by means of a feed device (30) of at least one sand storage unit (40) is fed to a core or mold production device (50), characterized in that the mixture-free region (21) of the mixing device (20) at least temporarily and / or between the mixing device (20) and the mixture-free region (31) of the feed device (30) and / or the mixture-free region (41) of the sand storage unit (40) behind the feed device (30) and before the core or mold production device (50) are located in the core or mold production device (50) or kept moist. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der mischungsfreie Bereich (21) der Mischvorrichtung (20) zumindest während des Mischvorganges wenigstens zeitweise befeuchtet oder feucht gehalten wird.A method according to claim 1, characterized in that the mixture-free region (21) of the mixing device (20) at least during the mixing process at least temporarily moistened or kept moist. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass ein Verdunsten oder Austreten von Feuchtigkeit aus der Mischung (M) dadurch unterbunden wird, dass oberhalb der Mischung (M) durch Zuführung von Feuchtigkeit die Luftfeuchtigkeit hochgehalten, insbesondere auf etwa 70 % bis 100 %, vorzugsweise auf etwa 80 % bis 100 % gehalten wird.A method according to claim 1 or 2, characterized in that evaporation or leakage of moisture from the mixture (M) is prevented by above the mixture (M) by supplying moisture, the humidity kept high, in particular to about 70% to 100% , is preferably maintained at about 80% to 100%. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die zum Befeuchten dienende Flüssigkeit (71) oder das zum Befeuchten dienende Wasser mittels Ultraschall zu einem schwebefähigen Aerosol zerstäubt und der Mischvorrichtung (20) und/oder der Zuführeinrichtung (30) und/oder der Sandvorratseinheit (40) zugeführt wird.Method according to one of claims 1 to 3, characterized in that the serving for wetting liquid (71) or serving for wetting water atomized by means of ultrasound to a floatable aerosol and the mixing device (20) and / or the feeder (30). and / or the sand storage unit (40) is supplied. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das aus der Flüssigkeit (71) gebildete Aerosol und die Größe des mit dem Aerosol versehenen Volumenstroms durch Veränderung der von dem/den Ultraschallgeber(n) abgegebenen Pulspakete und/oder durch Veränderung der Spannung des/der Ultraschallgeber(s) eingestellt wird.Method according to one of claims 1 to 4, characterized in that the aerosol formed from the liquid (71) and the size of the volume flow provided with the aerosol by changing the output from the / the ultrasonic generator (s) pulse packets and / or by changing the Voltage of the ultrasonic transducer (s) is set. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das schwebefähige Aerosol gebildet und über eine oder mehrere Leitungen (81,82,83) der Mischvorrichtung (20) und/oder der Zuführeinrichtung (30) und/oder der Sandvorratseinheit (40) zugeleitet wird.Method according to one of claims 1 to 5, characterized in that the floatable aerosol formed and via one or more lines (81,82,83) of the mixing device (20) and / or the feed device (30) and / or the sand storage unit (40 ). Vorrichtung zur Herstellung von Formen oder Kernen, insbesondere für Gießereizwecke, mit einer Mischvorrichtung (20) zum Vermischen von Formstoff oder Sand und einem Binder, der wenigstens überwiegend anorganisch, wasserlöslich und/oder hygroskopisch ist, und mit einer Zuführeinrichtung (30) zum Weiterleiten der Mischung (M) zu einer Sandvorratseinheit (40) einer Kern- oder Formherstellungsvorrichtung (50), dadurch gekennzeichnet, dass an der Mischvorrichtung (20) und/oder an der Zuführeinrichtung (30) und/oder an der Sandvorratseinheit (40) eine deren Inneres beaufschlagende oder in deren Inneres mündende Befeuchtungseinrichtung (2) vorgesehen ist.Apparatus for producing molds or cores, in particular for foundry purposes, comprising a mixing device (20) for mixing molding material or sand and a binder which is at least predominantly inorganic, water-soluble and / or hygroscopic, and with a feed device (30) for conveying the Mixture (M) to a sand storage unit (40) of a core or molding production device (50), characterized in that on the mixing device (20) and / or on the feed device (30) and / or on the sand storage unit (40) has an inside beaufschlagende or in the interior of which emanates moistening device (2) is provided. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Befeuchtungseinrichtung (2) wenigstens einen Ultraschallgeber in Form eines Ultraschallzerstäubers (60) für Wasser oder für eine insbesondere Wasser enthaltende Flüssigkeit (71) aufweist.Apparatus according to claim 7, characterized in that the moistening device (2) has at least one ultrasonic generator in the form of an ultrasonic atomizer (60) for water or for a liquid (71), in particular containing water. Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der/die Ultraschallzerstäuber (60) und ein dazu gehörendes Flüssigkeitsreservoir (70) räumlich von der Mischvorrichtung (20) und/oder von der Zuführeinrichtung (30) und/oder von der Sandvorratseinheit (40) getrennt angeordnet und mit dem/den zu befeuchtenden Bereich(en) über zumindest eine Rohr- oder Schlauchleitung (81,82,83) verbunden ist/sind.Apparatus according to claim 7 or 8, characterized in that the / the Ultraschallzerstäuber (60) and a corresponding liquid reservoir (70) spatially from the mixing device (20) and / or separated from the feed device (30) and / or from the sand storage unit (40) and connected to the / the area to be humidified (s) via at least one tube or hose line (81,82,83) /are. Vorrichtung nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass die Mischvorrichtung (20), die Zuführeinrichtung (30) und die Sandvorratseinheit (40) jeweils über eine Rohr- oder Schlauchleitung (81, 82, 83) mit dem Flüssigkeitsreservoir (70) verbunden sind.Device according to one of claims 7 to 9, characterized in that the mixing device (20), the feed device (30) and the sand supply unit (40) in each case via a pipe or hose line (81, 82, 83) with the liquid reservoir (70). are connected. Vorrichtung nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, dass die Anzahl der Ultraschallzerstäuber (60) mindestens der Anzahl der Rohr- oder Schlauchleitungen (81,82,83) entspricht und je Rohr- oder Schlauchleitung (81,82,83) wenigstens ein Ultraschallzerstäuber (60) vorgesehen ist.Device according to one of claims 7 to 10, characterized in that the number of Ultraschallzerstäuber (60) at least equal to the number of pipe or hose lines (81,82,83) and per pipe or hose (81,82,83) at least an ultrasonic atomizer (60) is provided. Vorrichtung nach einem der Ansprüche 7 bis 11, dadurch gekennzeichnet, dass zur Beförderung der Feuchtigkeit oder des Aerosols von dem/den Ultraschallzerstäuber(n) (60) zu der Mischvorrichtung (20) und/oder Zuführeinrichtung (30) und/oder Sandvorratseinheit (40) ein Ventilator (9) oder ein Druckgasanschluss (10) insbesondere oberhalb der Flüssigkeitsoberfläche im Flüssigkeitsreservoir (70) angeordnet ist.Device according to one of claims 7 to 11, characterized in that for transporting the moisture or the aerosol from the ultrasonic atomizer (s) (60) to the mixing device (20) and / or feeding device (30) and / or sand storage unit (40 ) is arranged a fan (9) or a compressed gas connection (10), in particular above the liquid surface in the liquid reservoir (70). Vorrichtung nach einem der Ansprüche 7 bis 12, dadurch gekennzeichnet, dass die Zuführeinrichtung (30) wenigstens ein beweglicher Transportkübel ist.Device according to one of claims 7 to 12, characterized in that the feed device (30) is at least one movable transport bucket.
EP16184969.0A 2010-04-29 2011-04-08 Method and device which moulding compound to be processed is kept moist during the production of cores Active EP3117928B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16184969T PL3117928T3 (en) 2010-04-29 2011-04-08 Method and device which moulding compound to be processed is kept moist during the production of cores

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010018751.8A DE102010018751B4 (en) 2010-04-29 2010-04-29 Method and device for producing molds or cores, in particular for foundry purposes
EP11713707.5A EP2563537B2 (en) 2010-04-29 2011-04-08 Method and device by which moulding compound to be processed is kept moist during the production of cores
PCT/EP2011/001757 WO2011134598A1 (en) 2010-04-29 2011-04-08 Method and device by which moulding compound to be processed is kept moist during the production of moulds or cores

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP11713707.5A Division EP2563537B2 (en) 2010-04-29 2011-04-08 Method and device by which moulding compound to be processed is kept moist during the production of cores
EP11713707.5A Division-Into EP2563537B2 (en) 2010-04-29 2011-04-08 Method and device by which moulding compound to be processed is kept moist during the production of cores

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EP3117928A1 true EP3117928A1 (en) 2017-01-18
EP3117928B1 EP3117928B1 (en) 2019-01-09

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US (1) US20130042989A1 (en)
EP (2) EP2563537B2 (en)
JP (1) JP5744183B2 (en)
CN (1) CN102869464A (en)
AU (1) AU2011247371B2 (en)
BR (1) BR112012027621A2 (en)
DE (2) DE102010018751B4 (en)
ES (2) ES2600508T5 (en)
HU (1) HUE043772T2 (en)
MX (1) MX2012012332A (en)
PL (1) PL3117928T3 (en)
RU (1) RU2557382C2 (en)
TR (1) TR201902510T4 (en)
UA (1) UA109784C2 (en)
WO (1) WO2011134598A1 (en)

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CN111132775B (en) * 2018-11-08 2022-02-25 苏州明志科技股份有限公司 Humidifying device and humidifying method for core making machine
CN112974736A (en) * 2021-02-08 2021-06-18 苏州明志科技股份有限公司 Moisturizing device and moisturizing method

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DE1203919B (en) * 1963-05-02 1965-10-28 Fischer Ag Georg Device for uninterrupted processing of foundry sand
DE2641361A1 (en) * 1975-10-10 1977-04-14 Fischer Ag Georg DRUM MIXER
DE2952403A1 (en) * 1979-12-27 1981-07-02 Alfelder Maschinen- und Modell-Fabrik Künkel, Wagner & Co KG, 3220 Alfeld METHOD AND DEVICE FOR THE PREPARATION, IN PARTICULAR COOLING AND MIXING OF MOLDED SAND
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Also Published As

Publication number Publication date
ES2713461T3 (en) 2019-05-21
ES2600508T3 (en) 2017-02-09
ES2600508T5 (en) 2020-03-04
EP2563537A1 (en) 2013-03-06
RU2557382C2 (en) 2015-07-20
DE102010018751A1 (en) 2011-11-03
RU2012146853A (en) 2014-06-10
PL3117928T3 (en) 2019-06-28
JP5744183B2 (en) 2015-07-01
JP2013525116A (en) 2013-06-20
UA109784C2 (en) 2015-10-12
EP3117928B1 (en) 2019-01-09
HUE043772T2 (en) 2019-09-30
MX2012012332A (en) 2013-03-05
DE102010018751B4 (en) 2015-08-13
US20130042989A1 (en) 2013-02-21
CN102869464A (en) 2013-01-09
TR201902510T4 (en) 2019-03-21
EP2563537B1 (en) 2016-08-31
AU2011247371A1 (en) 2012-12-06
AU2011247371B2 (en) 2014-08-14
DE202011110835U1 (en) 2016-08-30
WO2011134598A1 (en) 2011-11-03
EP2563537B2 (en) 2019-09-11
BR112012027621A2 (en) 2016-08-09

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