EP2848332B1 - Einrichtung und verfahren zum aushärten von giesserei-kernen - Google Patents

Einrichtung und verfahren zum aushärten von giesserei-kernen Download PDF

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Publication number
EP2848332B1
EP2848332B1 EP13183850.0A EP13183850A EP2848332B1 EP 2848332 B1 EP2848332 B1 EP 2848332B1 EP 13183850 A EP13183850 A EP 13183850A EP 2848332 B1 EP2848332 B1 EP 2848332B1
Authority
EP
European Patent Office
Prior art keywords
heating
catalyst
mixing stage
pressurized air
line
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
EP13183850.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2848332A1 (de
Inventor
Wilhelm Bovens
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.)
Lueber GmbH
Original Assignee
Lueber 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
Priority to PL13183850T priority Critical patent/PL2848332T3/pl
Application filed by Lueber GmbH filed Critical Lueber GmbH
Priority to EP13183850.0A priority patent/EP2848332B1/de
Priority to ES13183850.0T priority patent/ES2550337T3/es
Priority to US14/428,537 priority patent/US9630241B2/en
Priority to PCT/EP2014/066972 priority patent/WO2015036184A1/de
Priority to MX2015004154A priority patent/MX351091B/es
Priority to CN201480017567.8A priority patent/CN105102151B/zh
Priority to IN2731DEN2015 priority patent/IN2015DN02731A/en
Priority to JP2016515945A priority patent/JP6059402B2/ja
Publication of EP2848332A1 publication Critical patent/EP2848332A1/de
Application granted granted Critical
Publication of EP2848332B1 publication Critical patent/EP2848332B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • B22C9/123—Gas-hardening
    • 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
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores

Definitions

  • the present invention relates to a device and a method for curing foundry cores from sand-containing moldings, wherein the core for curing in a core mold via a gas-tight at the core mold gassing plate a gassing a catalyst vapor carrier gas mixture and then a compressed air stream , each with a predetermined pressure and temperature is exposed.
  • Such cold curing processes and equipment are known, such as the so-called cold box process in which two components of a resin system are added to the core sand, which then cure with the sand as soon as an organic catalyst such as an amine, such as an alkylamine or a methyl formate , is added as a catalyst.
  • an organic catalyst such as an amine, such as an alkylamine or a methyl formate
  • the one component could be e.g. a polyester resin, a polyether resin or any synthetic resin of liquid consistency with reactive hydroxyl groups; the second component is definitely an organic isocyanate.
  • the two components are thoroughly mixed with the foundry sand and then deformed. In order to catalyze the reaction now and to make the handling and use of particular amines reliable, various efforts have been made so far.
  • the known methods and devices have a common drawback by the curing process takes a considerable amount of time.
  • the formation of the core-sand mixture in the mold on a core-shooting machine often takes only a fraction of a second, whereas the subsequent gassing to harden the core has to be done over several seconds, which of course fumigation to an enormous cost bearer power.
  • metering pumps are switched between the catalyst source and the mixing point of the carrier gas and catalyst to better meter the catalyst, but this can only lead to an unsatisfactory result, since the pressure conditions in the catalyst flow in each dosing initially absolutely indifferent.
  • valve means comprise a multi-way valve in the flow line of the storage container, which is temporarily switched to a return line to the feed tank for pressure equalization in the flow system.
  • US 4,362,204 A a method and apparatus for curing foundry cores which uses inert gas as a carrier gas for the gassing process as well as non-heated along with already preheated compressed air for rinsing.
  • EP 1 375 031 B1 the same applicant a method and a device of the aforementioned type, in which the preheated compressed air is supplied via a switching valve of a heater and mixer and a reheater via a line for further heating for purging.
  • the advantage of this device or this method is that the compressed air for gassing with increasing heating of the catalyst vapor-carrier gas mixture can be heated variably to achieve a so-called contour hardening.
  • a disadvantage of this device is that a precise monitoring of the temperatures is necessary to ensure the safety of
  • the object of the present invention is now to provide a method for curing foundry cores from sand-containing moldings, as well as to provide a corresponding device by which a constant reduction of emissions at the workplace is ensured by reduced catalyst consumption at constant speed or cycle time. Furthermore, thereby the disposal costs and the cleaning costs for the device are reduced and thus a much lower environmental impact can be achieved. In addition, the device should be inexpensive.
  • the invention relates to a device for curing foundry cores from a sand-containing molding material, wherein the device is adapted to the core for its curing in a core mold a catalyst vapor-carrier gas mixture and subsequently a compressed air flow, each with a predetermined pressure and predetermined Temperature, suspend.
  • this device is characterized in that the device does not have a preheater which heats the compressed air before it is supplied to the heating and mixing stage or the heating source, so that the organic catalyst and the compressed air are heated together in the heating and mixing stage are arranged, and that a first check valve in the second line, which connects the compressed air source to the heating and mixing stage, which is closed at the beginning of the purge, and that a second check valve in the fourth line, which the compressed air source via the heat source is connected to the gassing plate, is arranged, which is open at the beginning of the rinse.
  • the device has two gas sources, of which the first is connected to the heater and mixer, and the second is connected to the heat source. Furthermore, it is advantageous if the heat source is switched on a temperature control. Further, it is advantageous if, prior to the supply of the catalyst in liquid form in the heater and mixing stage, the supply of the liquid catalyst container or the reservoir with a flow meter via a changeover valve temporarily switched to a return line to the reservoir for pressure equalization in the flow system can.
  • the present invention relates to a method for curing foundry cores, which is inventively characterized in that the guided for a timed fumigation through the heating and mixing stage compressed air is heated only in the heating and mixing stage together with the organic catalyst, and the compressed air used for the timed purging is conducted and heated by means of a heating source in a separate line.
  • a preferred embodiment of the method according to the invention is that before the supply of the catalyst in liquid form in the heater and mixing stage in the flow pressure equalization is prepared. Further, it is advantageous if the catalyst vapor-carrier gas mixture is heat-accompanied on its way to the core-forming tool.
  • the device comprises first a gas-tight coupled to the core mold gassing plate or hood 20 with an upstream heater and mixing stage 12 for transferring the liquid organic catalyst, which is preferably an amine, in its gaseous state and for generating one of the gassing of the core serving catalyst vapor-carrier gas mixture, as will be explained in more detail below.
  • the liquid organic catalyst which is preferably an amine
  • the organic catalyst in liquid form from a storage container or a liquid catalyst container 7 is metered via metering means 8 and 11, a metering unit 9, a flow meter 10 or the like via a line L1 into the heaters for timed gasification - And mixing stage 12, where it is converted into its gaseous state.
  • the heating and mixing stage 12 is also in fluid communication with a compressed air source 1 via a separate line L2 closable with a shut-off valve 2a and a proportional or a 2-stage pressure regulator 6a for timed control Fumigation to pass the compressed air supplied by the compressed air source 1 via the check valve 2a compressed air within a predetermined time through the burdened with the catalyst gas heater and mixing stage 12, wherein the supplied compressed air and the catalyst gas are heated together in the heater and mixing stage 12, so that a Catalyst vapor-carrier gas mixture is formed.
  • the heater and mixing stage 12 is also connected via a closable by a valve 5 and preferably heatable line L3 with the core mold, respectively.
  • the gassing plate 20 in conjunction to pass the catalyst vapor-carrier gas mixture through the sand-containing molding material in the core mold.
  • the compressed air source 1 via a closable with a check valve 2b separate line L4 and optionally a proportional or a 2-stage pressure regulator 6b and a heat source 3 and via a check valve 4 with the core mold, respectively.
  • the gassing plate 20 in flow communication.
  • the gassing plate 20 is provided with a vent valve 21.
  • a temperature control can be switched on for a regulated heating of the compressed air of the heating source 3.
  • the heating and mixing stage 12 may be switched on a temperature control.
  • the switches, valves, dosing and controls are program controllable via a control circuit, not shown.
  • metered for the gassing process of the organic catalyst in liquid form is fed together with compressed air from a compressed air source via separate lines a heater and mixing stage and is heated there together with the compressed air to a temperature for gasification of the Enough catalyst is sufficient so that a catalyst vapor-carrier gas mixture is formed, which by the sand-containing molding material in the core mold over another Conductor is passed.
  • the shut-off valve of the conduit which supplies the pressurized air to the gassing plate via the heating source is closed, and the check valve which directs the pressurized air to the heater and mixer is opened.
  • the gasification temperature required for amine as catalyst is between 80 ° C and 110 ° C, depending on the nature of the amine.
  • the heating in the heating and mixing stage is according to the gasification temperature of the catalyst used.
  • the rinsing i. for a timed purging, compressed air required within a given time to be passed through the fumigated sand-containing molding material in the core mold, after it was supplied via a separate line to a heating source and there was heated to a temperature higher than that for gasification of the catalyst required temperature.
  • the temperature for rinsing is preferably between 150 ° C and 180 ° C, more preferably 170 ° C.
  • a single gas source 1 can be used.
  • both the second line L2 and the fourth line L4 are connected to the gas source serving as the compressed air source.
  • it can also be two separate compressed air sources 1 (not shown in the drawing) can be used.
  • the fourth line L4 is connected to the first compressed air source for purging, and the heater and mixer is connected to the second compressed air source via the second line L2.
  • An advantage of two separate sources of compressed air and / or two separate gas lines L2 and L4, each with a respective check valve 2a and 2b, is that the use of two check valves is cheaper in contrast to a changeover valve and greater safety with the simpler control of the valve the switching process is given.
  • the required amount of catalyst can be greatly reduced, since on the surface The condensed catalyst quickly becomes gaseous again and thus can be driven quickly into the core.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)
  • Catalysts (AREA)
EP13183850.0A 2013-09-11 2013-09-11 Einrichtung und verfahren zum aushärten von giesserei-kernen Active EP2848332B1 (de)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP13183850.0A EP2848332B1 (de) 2013-09-11 2013-09-11 Einrichtung und verfahren zum aushärten von giesserei-kernen
ES13183850.0T ES2550337T3 (es) 2013-09-11 2013-09-11 Dispositivo y procedimiento para el endurecimiento de núcleos de fundición
PL13183850T PL2848332T3 (pl) 2013-09-11 2013-09-11 Urządzenie i sposób do utwardzania rdzeni odlewniczych
PCT/EP2014/066972 WO2015036184A1 (de) 2013-09-11 2014-08-07 Einrichtung und verfahren zum aushärten von giesserei-kernen
US14/428,537 US9630241B2 (en) 2013-09-11 2014-08-07 Device and method for hardening foundry cores
MX2015004154A MX351091B (es) 2013-09-11 2014-08-07 Dispositivo y metodo para endurecer nucleos de fundicion.
CN201480017567.8A CN105102151B (zh) 2013-09-11 2014-08-07 用于硬化铸造型芯的装置和方法
IN2731DEN2015 IN2015DN02731A (zh) 2013-09-11 2014-08-07
JP2016515945A JP6059402B2 (ja) 2013-09-11 2014-08-07 鋳物用中子を硬化するための装置および方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13183850.0A EP2848332B1 (de) 2013-09-11 2013-09-11 Einrichtung und verfahren zum aushärten von giesserei-kernen

Publications (2)

Publication Number Publication Date
EP2848332A1 EP2848332A1 (de) 2015-03-18
EP2848332B1 true EP2848332B1 (de) 2015-08-05

Family

ID=49150813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13183850.0A Active EP2848332B1 (de) 2013-09-11 2013-09-11 Einrichtung und verfahren zum aushärten von giesserei-kernen

Country Status (9)

Country Link
US (1) US9630241B2 (zh)
EP (1) EP2848332B1 (zh)
JP (1) JP6059402B2 (zh)
CN (1) CN105102151B (zh)
ES (1) ES2550337T3 (zh)
IN (1) IN2015DN02731A (zh)
MX (1) MX351091B (zh)
PL (1) PL2848332T3 (zh)
WO (1) WO2015036184A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018120993A1 (de) * 2018-08-28 2020-03-05 Fritz Winter Eisengiesserei Gmbh & Co. Kg Verfahren zur Begasung von für die Herstellung von Gießkernen in einen Kernkasten eingeschossenem Formstoff mit einem Katalysatorgas

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH603276A5 (zh) 1975-10-02 1978-08-15 Werner Lueber
US4112515A (en) * 1976-11-19 1978-09-05 Sandow Louis W Mixing catalyst and carrier gas for curing foundry molds and cores
US4359082A (en) * 1979-07-28 1982-11-16 Michel Horst Werner Method and apparatus for hardening mold parts made of sand for making metal castings
US4362204A (en) * 1980-03-17 1982-12-07 The Mead Corporation Method and apparatus for curing a foundry core
CH670405A5 (zh) 1985-12-19 1989-06-15 Werner Lueber
JP2500277Y2 (ja) * 1991-12-11 1996-06-05 日立金属株式会社 コ―ルドボックス造型機用ガス発生装置
CN2298079Y (zh) * 1996-12-19 1998-11-25 赵渊 水玻璃砂硬化的气体发生装置
US5971056A (en) 1997-05-27 1999-10-26 Luger GmbH Device for hardening foundry cores and use thereof
CN1165396C (zh) * 1997-06-27 2004-09-08 卢伯股份有限公司 硬化铸芯的装置和方法
US6505671B1 (en) * 2000-12-28 2003-01-14 Hayes Lemmerz International, Inc. Method for producing a sand core
WO2003013761A1 (de) * 2001-08-10 2003-02-20 Dipl.-Ing. Laempe Gmbh Verfahren und vorrichtung zur herstellung von formen oder kernen für giessereizwecke
CH695547A5 (de) * 2002-06-17 2006-06-30 Lueber Gmbh Verfahren und Einrichtung zum Aushärten von Giesserei-Kernen.
CH698743B1 (de) * 2006-04-24 2009-10-15 Lueber Gmbh Verfahren und Einrichtung zum Aushärten von anorganischen Giesserei-Kernen und -Formen.

Also Published As

Publication number Publication date
JP6059402B2 (ja) 2017-01-11
CN105102151A (zh) 2015-11-25
US20160008873A1 (en) 2016-01-14
PL2848332T3 (pl) 2016-01-29
IN2015DN02731A (zh) 2015-09-04
EP2848332A1 (de) 2015-03-18
MX351091B (es) 2017-10-02
JP2016525450A (ja) 2016-08-25
US9630241B2 (en) 2017-04-25
ES2550337T3 (es) 2015-11-06
MX2015004154A (es) 2015-07-31
WO2015036184A1 (de) 2015-03-19
CN105102151B (zh) 2017-10-31

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