EP1957218B8 - Verfahren und vorrichtung zur herstellung von formen oder kernen insbesondere für giessereizwecke - Google Patents

Verfahren und vorrichtung zur herstellung von formen oder kernen insbesondere für giessereizwecke Download PDF

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Publication number
EP1957218B8
EP1957218B8 EP06805795A EP06805795A EP1957218B8 EP 1957218 B8 EP1957218 B8 EP 1957218B8 EP 06805795 A EP06805795 A EP 06805795A EP 06805795 A EP06805795 A EP 06805795A EP 1957218 B8 EP1957218 B8 EP 1957218B8
Authority
EP
European Patent Office
Prior art keywords
shooting
liquid
aerosol
reject
mixture
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
EP06805795A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1957218B1 (de
EP1957218A1 (de
Inventor
Joachim Laempe
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 GmbH
Original Assignee
Laempe & Mossner 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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Application filed by Laempe & Mossner GmbH filed Critical Laempe & Mossner GmbH
Priority to PL06805795T priority Critical patent/PL1957218T3/pl
Publication of EP1957218A1 publication Critical patent/EP1957218A1/de
Application granted granted Critical
Publication of EP1957218B1 publication Critical patent/EP1957218B1/de
Publication of EP1957218B8 publication Critical patent/EP1957218B8/de
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C15/00Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23Compacting by gas pressure or vacuum
    • B22C15/24Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
    • B22C15/245Blowing tubes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C19/00Components or accessories for moulding machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C23/00Tools; Devices not mentioned before for moulding

Definitions

  • the invention relates to a method for producing molds or cores, in particular for foundry purposes, from a mixture of sand or molding material and a binder, which is in particular water-soluble and / or hygroscopic, wherein the mixture by means of at least one shooting unit of this in a shooting process is injected into at least one disposed on a shooting plate broke opening in a mold or core tool and then cured, wherein at least between two shooting operations, the area of the reject opening by means of a liquid or water moistened and / or kept moist.
  • the invention further relates to an apparatus for producing molds or cores, in particular for foundry purposes, from a mixture of sand or molding material and a preferably inorganic binder, which is in particular water-soluble and / or hygroscopic, with at least one shooting unit having a shooting tube and a shooting head, wherein a firing plate with at least one reject opening and a device for moistening the latter are provided on the firing head, in particular for carrying out the aforementioned method.
  • DE 101 44 193 C1 discloses that the added moisture should act as condensate, which in turn can lead to excessive dilution of the mixture of sand and binder with the mentioned disadvantages in the region of the reject or discharge opening of a filling element.
  • the moistening liquid or moistening water is ultrasonically atomized into a buoyant aerosol and supplied to the region of the reject opening and / or the shooting unit or the shooting head.
  • ultrasound liquid for example water-containing liquid or even water
  • a suspended aerosol whose liquid constituents are so small that they pass into atmospheric moisture without condensing and without condensate in the region knock down the reject opening for the sand-binder mixture.
  • the size of the fluid particles produced by ultrasound may be on the order of 0.01 millimeters or less.
  • a sufficiently high humidity is achieved, which prevents the drying of the sand-binder mixture, for example, between two shots, so that the individual shots can be done safely, without causing unevenly moist areas in the form or in the core.
  • 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 transducer (s) and / or by changing the voltage of the ultrasound transmitter (s). In this way, the amount of aerosol that can be aerated, which wets the area of the reject opening (s), can be adapted to existing conditions such as atmospheric humidity, number of rejected openings and ambient temperature.
  • a particularly expedient embodiment of the method according to the invention may consist in that the aerosol can be suspended formed at a distance from the / the reject openings and fed via a line of the / the reject openings.
  • the aerosol can be suspended formed at a distance from the / the reject openings and fed via a line of the / the reject openings.
  • Another particularly advantageous embodiment of the method according to the invention can be that the sand supply in the shooting tube and / or in the shooting head is moistened with a liquid aerosol.
  • the shooting tube and / or the shooting head can therefore also be connected via one or more lines with an ultrasonic atomizer for liquid or water, so that the sand supply and in particular its surface, which could otherwise possibly form a crust, are moistened, but without drenched What can be done in addition to direct humidification of the reject opening or instead as indirect humidification of the reject opening.
  • the device defined at the outset is characterized in that it has at least one ultrasonic atomizer for water or for a liquid containing in particular water, and that this ultrasonic atomiser is in communication with the reject opening (s).
  • the invention makes use of the fact or knowledge that with ultrasound donors water or a water-containing liquid can be atomized such that the individual droplets can be less than 20 thousandths of a millimeter or even less than 10 thousandths of a millimeter, so that they in humidity and do not precipitate as a moisture film on parts of the shooting unit and in particular in the area of the reject opening.
  • the ultrasonic transmitter (s) and the associated liquid reservoir are spatially separated from the shooting unit and connected to the region of the reject opening (s) via at least one pipe or hose line.
  • the floating aerosol formed by an ultrasonic atomizer made of water or of a liquid containing water can be easily transported over several meters through such a conduit, to then provide sufficiently humid air at the orifices, which causes the mixture of sand to dry or mold material and binder prevented in particular in the reject openings, but without too much wet this mixture.
  • the liquid reservoir with ultrasound generator can advantageously be arranged at a location of the forming or core shooting machine or near this machine, where sufficient space is available for this purpose.
  • a fan and / or a pressure connection can be arranged in particular above the liquid surface of the liquid reservoir.
  • a fan or a compressed gas connection can improve this flow or also allow a greater distance of the ultrasonic transmitter from the reject openings.
  • the aerosol can also be conveyed upwards, so that the ultrasound transmitter with the liquid reservoir can also be arranged lower, where as a rule there is sufficient space therefor.
  • the advantage here is that any condensate that may occur on the inner walls of the tube or hose, wherein the aerosol is transported, can flow back down into the reservoir.
  • the liquid reservoir is a closed liquid container and is under pressure by a fan arranged in or on one of its walls or effective there and / or pressure connection. Accordingly, the aerosol generated by an ultrasonic atomizer can be transported to the place of its destination.
  • Be liquid reservoir and the liquid contained therein and a corresponding amount of aerosol can be generated so that correspondingly large shooting units can be kept moist at several places simultaneously.
  • the shooting head may include a movable guard having a scavenging hood having the aerosol port removable or movable away from the individual shots, and the connecting line from the ultrasonic atomizer and liquid reservoir to the guard may be a telescoping tube or a hose.
  • a movable protection device and flushing hood to provide, since it can be connected to the movable line, which can join the movements of the protective device.
  • the sand supply can thereby be specifically moistened in such a way that only a small or optionally no moisture supply is necessary at the outlet or shooting opening, but the moisture is supplied to the region of the reject opening via the sand reservoir.
  • direct or indirect delivery of the aerosol to the reject port (s) may be provided, with a combination of both promising the best results.
  • a designated as a whole with 1 device for the production of molds or cores, in the embodiment for the production of cores for foundry purposes, from a mixture M of sand or a molding material and a particular water-soluble or hygroscopic binder has a designated as a whole with 2 shooting unit, to which essentially comprises a shooting tube 3 receiving the mixture M with a firing head 4.
  • a shooting plate 5 is arranged, over which the mixture M lies, in a shooting process by at least one shooting nozzle 6 with reject opening 7 and - in the embodiment - another reject opening 7 from the shooting unit 2 in a core tool. 8 can be injected.
  • the shooting tube 3 is pressurized from above, so that the mixture M driven by the shooting nozzle 6, which fits into an inlet opening 9 of the core tool 8, from the space located above the shooting plate 5 and in the core tool 8 is provided for receiving the mixture provided space 14 and this fills.
  • the device 1 is shown in the state after a shooting operation, that is, shooting unit 2 and core tool 8 are separated and spaced from each other.
  • the protective device 10 has a cavity 12. When it is connected to the shooting plate 5 as shown, it engages over these and in particular the reject openings 7 and also the shooting nozzle 6, which projects into the cavity 12. In this case, the cavity 12 is closed relative to the shooting plate 5 gas-tight or almost gas-tight relative to the environment.
  • the figure also shows a reservoir 13 for liquid 15 and two ultrasound atomizers 16 which act on this liquid 15 and are connected to the liquid reservoir 13, so that the water-containing liquid 15 can be transformed into a floating aerosol , which is indicated as "cloud mushroom" 17 above the surface of the liquid 15.
  • the ultrasonic atomizers 16 and the liquid reservoir 13 are connected via a line 18 to the cavity 12 of the protective device 10 and thus to the reject openings 7, so that the moistened by the suspended aerosol, but are not wetted by precipitating water.
  • the ultrasonic atomizers 16 and the liquid reservoir 13 are arranged spatially separated from the shooting unit 2 and connected to the region of the reject openings 7 via a pipe or hose line 18.
  • the generation of the floating aerosol 17 may take place at a location that provides sufficient space therefor.
  • a Fan 19 and a pressure port 20 indicated both possibilities can be provided simultaneously or alternatively.
  • the fan 19 and / or the pressure port 20 are above the surface of the liquid 15 in the liquid reservoir 13, which is designed as a closed liquid container, so above the liquid 15 by the fan 19 or the compressed gas port 20 serving for the transport of the aerosol 17 Overpressure can occur.
  • the compressed gas connection 20 or the fan 19 are arranged on or in a wall 21 of the liquid reservoir 13 formed as a liquid container.
  • the leading to her line 18 is designed as a hose that can participate in appropriate movements.
  • the protective device 10 belonging to the shooting head 4 and the shooting plate 5 can be removed from the shooting plate 5 and moved away with the flushing cap 11 despite the connection for the aerosol and despite the line 18 leading to this connection for the individual shots.
  • the line 18 has a branch 22 and another line strand 23 leads to and into the shooting tube 3, so that the aerosol formed by the ultrasonic atomizers 16 can also be transported in or over the mixture M to the Surface of this supply of Prevent mixture from encrusting.
  • the entire mixture can be kept moist from the outset, which can prevent crusting in the shooting openings 7.
  • the device 1 With the device 1 according to the invention, it is thus possible to atomize the liquid 15, for example water, which is used for moistening by means of ultrasound into a suspended aerosol and to supply it directly or indirectly to the region of the reject opening 7 or the ejection openings 7.
  • the direct feed takes place in the embodiment via the line 18 and the protective device 10 with the cavity 12 and the indirect supply via the wiring harness 23 and the shooting tube.
  • the aerosol and the size of the volume flow provided with the aerosol can be adjusted by changing the pulse packets emitted by the ultrasound transmitters 16 and / or by changing the voltage of the ultrasound transmitters 16.
  • the shooting unit 2 is connected via the hose line 18 and the wiring harness 23 to the liquid reservoir 13 and the ultrasonic atomizers 16, the suspended aerosol is formed at a distance from the reject openings 7 and directed thereto via the mentioned lines.
  • the ultrasonically generated aerosol 17 results in such small liquid particles that they pass into humidity and so can be used to moisten the mixture M at least in the region of the reject openings 7, but without being deposited as moisture and the mixture M may even be soaked unevenly and possibly Flush out or loosen binder.
  • the mixture M by means of at least one shooting unit 2 from this or from a shooting tube 3 and a shooting head 4 by at least one disposed on a shooting plate 5 reject opening 7 in a molding or core tool 8 is injected, wherein the area of the reject opening 7 is moistened and / or kept moist by means of a liquid at least between two firing operations, wherein the liquid 15 serving for moistening atomizes by means of at least one ultrasonic atomizer 16 to form a suspended aerosol and the reject opening 7 is supplied directly or indirectly, for example via a line 18 and / or 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Special Spraying Apparatus (AREA)
  • Mold Materials And Core Materials (AREA)
  • Nozzles (AREA)
EP06805795A 2005-12-01 2006-09-21 Verfahren und vorrichtung zur herstellung von formen oder kernen insbesondere für giessereizwecke Active EP1957218B8 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06805795T PL1957218T3 (pl) 2005-12-01 2006-09-21 Sposób i urządzenie do wytwarzania form lub rdzeni, zwłaszcza do celów odlewniczych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005057724A DE102005057724B3 (de) 2005-12-01 2005-12-01 Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke
PCT/EP2006/009180 WO2007062706A1 (de) 2005-12-01 2006-09-21 Verfahren und vorrichtung zur herstellung von formen oder kernen insbesondere für giessereizwecke

Publications (3)

Publication Number Publication Date
EP1957218A1 EP1957218A1 (de) 2008-08-20
EP1957218B1 EP1957218B1 (de) 2011-05-11
EP1957218B8 true EP1957218B8 (de) 2011-09-28

Family

ID=37650611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06805795A Active EP1957218B8 (de) 2005-12-01 2006-09-21 Verfahren und vorrichtung zur herstellung von formen oder kernen insbesondere für giessereizwecke

Country Status (10)

Country Link
US (1) US7934534B2 (ja)
EP (1) EP1957218B8 (ja)
JP (1) JP4878372B2 (ja)
CN (1) CN101304828B (ja)
AT (1) ATE508819T1 (ja)
DE (1) DE102005057724B3 (ja)
ES (1) ES2365812T3 (ja)
PL (1) PL1957218T3 (ja)
RU (1) RU2397841C2 (ja)
WO (1) WO2007062706A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010018751B4 (de) * 2010-04-29 2015-08-13 Laempe & Mössner GmbH Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke
CN102513503A (zh) * 2011-12-14 2012-06-27 安徽省辉煌机械制造有限公司 一种铁模覆砂铸造工艺
CN102601302A (zh) * 2012-03-26 2012-07-25 苏州明志科技有限公司 一种中间砂斗
DE102013204619B3 (de) * 2013-03-15 2014-05-15 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Herstellen von Formen oder Kernen für Gießereizwecke
WO2020093337A1 (zh) * 2018-11-08 2020-05-14 苏州明志科技有限公司 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

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3511283A1 (de) * 1985-03-28 1986-10-09 Dietmar Prof. Dr.-Ing. 5100 Aachen Boenisch Verfahren und vorrichtung zum verdichten von giessereiformstoffen
JPH0780037B2 (ja) * 1990-02-23 1995-08-30 株式会社浪速製作所 下金型固定式水平割鋳型造型機
JPH03297535A (ja) * 1990-04-13 1991-12-27 Hitachi Metals Ltd 鋳型の型合せ方法
JP2927925B2 (ja) * 1990-09-28 1999-07-28 東芝機械株式会社 鋳造用金型の離型剤塗布方法
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
TW279141B (ja) * 1994-10-07 1996-06-21 Sintokogio Ltd
AU5263999A (en) * 1998-03-13 1999-10-11 Wotec Automationssysteme Gmbh Spraying device for casting molds
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
DE10340491B3 (de) * 2003-09-03 2005-03-10 Laempe & Gies Gmbh Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen

Also Published As

Publication number Publication date
JP2009517220A (ja) 2009-04-30
PL1957218T3 (pl) 2011-10-31
CN101304828B (zh) 2010-09-29
EP1957218B1 (de) 2011-05-11
WO2007062706A1 (de) 2007-06-07
DE102005057724B3 (de) 2007-02-01
CN101304828A (zh) 2008-11-12
JP4878372B2 (ja) 2012-02-15
ATE508819T1 (de) 2011-05-15
ES2365812T3 (es) 2011-10-11
US7934534B2 (en) 2011-05-03
US20080277089A1 (en) 2008-11-13
RU2397841C2 (ru) 2010-08-27
RU2008113809A (ru) 2010-01-10
EP1957218A1 (de) 2008-08-20

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