EP2563537B2 - Verfahren und vorrichtung zum feuchthalten von zu verarbeitendem formstoff bei der herstellung von kernen - Google Patents

Verfahren und vorrichtung zum feuchthalten von zu verarbeitendem formstoff bei der herstellung von kernen Download PDF

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Publication number
EP2563537B2
EP2563537B2 EP11713707.5A EP11713707A EP2563537B2 EP 2563537 B2 EP2563537 B2 EP 2563537B2 EP 11713707 A EP11713707 A EP 11713707A EP 2563537 B2 EP2563537 B2 EP 2563537B2
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EP
European Patent Office
Prior art keywords
storage unit
mixture
sand storage
mixing
mixing device
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.)
Active
Application number
EP11713707.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2563537A1 (de
EP2563537B1 (de
Inventor
Rudolf Wintgens
Martin Faller
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.)
Laempe Moessner Sinto GmbH
Original Assignee
Laempe Mossner Sinto 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=44278628&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2563537(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Laempe Mossner Sinto GmbH filed Critical Laempe Mossner Sinto GmbH
Priority to PL16184969T priority Critical patent/PL3117928T3/pl
Priority to EP16184969.0A priority patent/EP3117928B1/de
Publication of EP2563537A1 publication Critical patent/EP2563537A1/de
Application granted granted Critical
Publication of EP2563537B1 publication Critical patent/EP2563537B1/de
Publication of EP2563537B2 publication Critical patent/EP2563537B2/de
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Classifications

    • 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 according to claim 1, for the production of cores 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 production device.
  • the invention further relates to a device according to claim 6, for the production of cores 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 manufacturing apparatus.
  • the WO 03/22 487 A1 in that the supplied moisture should be effective as a condensate, which in turn can lead to excessive dilution of the mixture of sand and binder with the disadvantages already mentioned in the region of the reject or discharge opening of a core shooter.
  • the method defined at the outset according to claim 1 provides that the mixture-free region of the mixing device at least temporarily during the mixing process and the mixing-free region of the feeding device located between the mixing device and the core-producing device and the mixture-free region of the sand-storing unit behind the feeding device and before the core or mold making device moistened or kept moist, with the amounts of moisture for each area individually sized and fed.
  • 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 the feeder and also the sand storage unit, but also the core manufacturing device so can be reduced and / or the necessary cleaning intervals are extended. This fact can in particular have a positive effect on the productivity of the core 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 escapes from the mixture, it dries on parts the mixing device and soiling the blender.
  • 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 is atomized by means of ultrasound to a floatable aerosol and the mixing device and the feeder and the sand supply unit is supplied.
  • the aerosol which can be suspended has such small liquid constituents that they can directly evaporate and increase the humidity without first condensing and without condensing as condensate in the mixing device and the feed device and the sand storage unit.
  • the size of the fluid particles produced 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 generator (s) and / or by changing the voltage of the ultrasound generator (s). In this way, the amount of airborne aerosol, with which the mixing device and the sand storage unit is moistened, adapt 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 several lines of the mixing device and the feed device and the sand storage unit.
  • the generation of the aerosol thus happens outside of the mixing, feeding and the sand storage unit.
  • For the preparation of the aerosol so no additional space is needed in the mixing, feeding and 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 according to claim 6, characterized in that provided on the mixing device and on the feeding device and the sand storage unit whose inside acting or in the interior of which moistening device is provided, so that the amount of moisture for each area individually - and can be fed.
  • the generation and maintenance of the desired air humidity can be achieved in a particularly simple manner so that the risk of drying due to moisture loss of the mixture in the mixing device and in the feed device and / or in the sand storage unit can be reduced. This can favorably reduce the contamination of the mixing device and the feeder and the sand storage unit, but also the downstream core manufacturing 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 in such a way 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 change into atmospheric moisture and precipitating hardly or hardly as a moisture film on parts of the mixing device and the feeder and the sand storage unit.
  • the / the ultrasonic atomizer and a corresponding liquid reservoir are spatially separated from the mixing device and from the feeder and from the sand storage unit and connected to the areas to be humidified via at least one pipe or hose.
  • 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 the sand storage unit, but without too much wet this mixture.
  • the liquid reservoir with the ultrasound transmitters can thus advantageously at a point of the 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.
  • moist air can be introduced individually to the individual process steps into the mixing device, the feed device and the sand storage unit.
  • the number of ultrasonic atomizers corresponds at least to the number of pipe or hose lines and at least one ultrasonic atomizer is provided per pipe or hose line.
  • 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 a compressed gas connection is arranged in particular above the liquid surface in the liquid reservoir.
  • a fan or compressed gas connection can improve this flow or also allow a greater distance of the ultrasonic atomizer from the areas of the device to be supplied with moist air .
  • 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.
  • FIGURE shows a schematic representation of a longitudinal section of a mixing device, a feeder 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 to the mixing device, one to the feeder and one to the sand storage unit runs.
  • a generally designated 1 apparatus for producing molds or cores in the embodiment for the production of cores for foundry purposes, comprises a mixing device 20 with a mixing tool 22 for producing a mixture M by mixing molding material or sand and a binder, a feeder 30 for Forwarding the mixture M to a sand storage unit 40 with a closure device 42 and a core manufacturing 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 conduits 81, 82 and 83 are, which extend directly from the liquid reservoir 70 in said areas of the device 1 and provide therewith moist areas for mixing-free areas 21, 31 and 41.
  • 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 in the liquid-free region of the liquid reservoir 70.
  • 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 supplied by means of a feeder 30 at least one sand storage unit 40 a Kernher thoroughlysvorraum 50, wherein the mixture-free region 21 of the mixing device 20th at least temporarily, and the feed device 30 and the sand storage unit 40 located between the mixing device 20 and the core or mold making device 50 are humidified or held moist behind the feed device 30 and before the core manufacturing device 50 by means of a liquid 71, wherein the liquid 71 to be humidified is replaced by at least atomizing an ultrasonic atomizer 60 into a suspended aerosol and supplying it to the mixing device 20 and the feeder 30 and the sand storage unit 40 via pipes 81, 82 and 83.

Landscapes

  • 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)
  • Nozzles (AREA)
  • Jigging Conveyors (AREA)
EP11713707.5A 2010-04-29 2011-04-08 Verfahren und vorrichtung zum feuchthalten von zu verarbeitendem formstoff bei der herstellung von kernen Active EP2563537B2 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL16184969T PL3117928T3 (pl) 2010-04-29 2011-04-08 Sposób i urządzenie dla utrzymania wilgotności przerabianego materiału formierskiego przy wytwarzaniu form i rdzeni
EP16184969.0A EP3117928B1 (de) 2010-04-29 2011-04-08 Verfahren und vorrichtung zum feuchthalten von zu verarbeitendem formstoff bei der herstellung von formen oder kernen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010018751.8A DE102010018751B4 (de) 2010-04-29 2010-04-29 Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke
PCT/EP2011/001757 WO2011134598A1 (de) 2010-04-29 2011-04-08 Verfahren und vorrichtung zum feuchthalten von zu verarbeitendem formstoff bei der herstellung von formen oder kernen

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP16184969.0A Division EP3117928B1 (de) 2010-04-29 2011-04-08 Verfahren und vorrichtung zum feuchthalten von zu verarbeitendem formstoff bei der herstellung von formen oder kernen
EP16184969.0A Division-Into EP3117928B1 (de) 2010-04-29 2011-04-08 Verfahren und vorrichtung zum feuchthalten von zu verarbeitendem formstoff bei der herstellung von formen oder kernen

Publications (3)

Publication Number Publication Date
EP2563537A1 EP2563537A1 (de) 2013-03-06
EP2563537B1 EP2563537B1 (de) 2016-08-31
EP2563537B2 true EP2563537B2 (de) 2019-09-11

Family

ID=44278628

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11713707.5A Active EP2563537B2 (de) 2010-04-29 2011-04-08 Verfahren und vorrichtung zum feuchthalten von zu verarbeitendem formstoff bei der herstellung von kernen
EP16184969.0A Active EP3117928B1 (de) 2010-04-29 2011-04-08 Verfahren und vorrichtung zum feuchthalten von zu verarbeitendem formstoff bei der herstellung von formen oder kernen

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP16184969.0A Active EP3117928B1 (de) 2010-04-29 2011-04-08 Verfahren und vorrichtung zum feuchthalten von zu verarbeitendem formstoff bei der herstellung von formen oder kernen

Country Status (15)

Country Link
US (1) US20130042989A1 (pl)
EP (2) EP2563537B2 (pl)
JP (1) JP5744183B2 (pl)
CN (1) CN102869464A (pl)
AU (1) AU2011247371B2 (pl)
BR (1) BR112012027621A2 (pl)
DE (2) DE102010018751B4 (pl)
ES (2) ES2713461T3 (pl)
HU (1) HUE043772T2 (pl)
MX (1) MX2012012332A (pl)
PL (1) PL3117928T3 (pl)
RU (1) RU2557382C2 (pl)
TR (1) TR201902510T4 (pl)
UA (1) UA109784C2 (pl)
WO (1) WO2011134598A1 (pl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102601302A (zh) * 2012-03-26 2012-07-25 苏州明志科技有限公司 一种中间砂斗
CN111132775B (zh) * 2018-11-08 2022-02-25 苏州明志科技股份有限公司 一种用于制芯机的加湿装置及加湿方法
CN112974736A (zh) * 2021-02-08 2021-06-18 苏州明志科技股份有限公司 一种保湿装置及保湿方法

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE1203919B (de) † 1963-05-02 1965-10-28 Fischer Ag Georg Vorrichtung zum ununterbrochenen Aufbereiten von Giessereisand
DE10144193C1 (de) † 2001-09-08 2002-10-31 Vaw Mandl & Berger Gmbh Linz Verfahren und Formschießmaschine zum Herstellen von Formteilen, wie Gießkernen, für Gießformen zum Vergießen von Metallschmelze
DE102005057724B3 (de) † 2005-12-01 2007-02-01 Laempe & Mössner GmbH Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke

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GB1557184A (en) * 1975-11-26 1979-12-05 Baker Perkins Holdings Ltd Mixing machines
US4304289A (en) * 1978-04-24 1981-12-08 Foundry Technology Inc. Apparatus for controlling the moisture content of foundry sand
DE2952403C2 (de) * 1979-12-27 1984-08-23 Alfelder Maschinen- und Modell-Fabrik Künkel, Wagner & Co KG, 3220 Alfeld Verfahren und Vorrichtung zum Aufbereiten, insb. Kühlen und Mischen von Formsand
SU956135A1 (ru) * 1980-11-05 1982-09-07 Всесоюзный Проектно-Технологический Институт Энергомашиностроения Устройство дл заливки модельного состава в форму
GB2089700A (en) * 1980-12-12 1982-06-30 Fischer Ag Georg Apparatus for the processing of granular material
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FR2687942B1 (fr) * 1992-02-27 1997-08-14 Peugeot Procede et dispositif de moulage de noyaux en sable de fonderie contenant une resine durcissable, permettant d'eviter le colmatage de buses d'injection du sable.
DK135193A (da) * 1993-12-02 1995-06-03 Dansk Ind Syndikat Formpressemaskine med væsketågeindsprøjtning
US5816312A (en) * 1994-09-30 1998-10-06 Mazda Motor Corporation Method of and apparatus for reclaiming foundry sand
DE19545917B4 (de) * 1995-07-24 2004-09-16 Künkel-Wagner Prozesstechnologie GmbH Vorrichtung und Verfahren zur Bentonitdispergierung und zum Aufbereiten von Gießereiumlaufsänden
JP3030260B2 (ja) * 1997-03-10 2000-04-10 マツダ株式会社 鋳物砂の再生方法およびその装置
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Publication number Priority date Publication date Assignee Title
DE1203919B (de) † 1963-05-02 1965-10-28 Fischer Ag Georg Vorrichtung zum ununterbrochenen Aufbereiten von Giessereisand
DE10144193C1 (de) † 2001-09-08 2002-10-31 Vaw Mandl & Berger Gmbh Linz Verfahren und Formschießmaschine zum Herstellen von Formteilen, wie Gießkernen, für Gießformen zum Vergießen von Metallschmelze
DE102005057724B3 (de) † 2005-12-01 2007-02-01 Laempe & Mössner GmbH Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke

Also Published As

Publication number Publication date
EP2563537A1 (de) 2013-03-06
TR201902510T4 (tr) 2019-03-21
BR112012027621A2 (pt) 2016-08-09
WO2011134598A1 (de) 2011-11-03
UA109784C2 (uk) 2015-10-12
ES2600508T5 (es) 2020-03-04
HUE043772T2 (hu) 2019-09-30
EP3117928A1 (de) 2017-01-18
AU2011247371B2 (en) 2014-08-14
RU2557382C2 (ru) 2015-07-20
DE102010018751B4 (de) 2015-08-13
ES2600508T3 (es) 2017-02-09
DE102010018751A1 (de) 2011-11-03
US20130042989A1 (en) 2013-02-21
EP2563537B1 (de) 2016-08-31
JP2013525116A (ja) 2013-06-20
AU2011247371A1 (en) 2012-12-06
MX2012012332A (es) 2013-03-05
ES2713461T3 (es) 2019-05-21
EP3117928B1 (de) 2019-01-09
RU2012146853A (ru) 2014-06-10
PL3117928T3 (pl) 2019-06-28
DE202011110835U1 (de) 2016-08-30
CN102869464A (zh) 2013-01-09
JP5744183B2 (ja) 2015-07-01

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