EP1375031A1 - Verfahren und Einrichtung zum Aushärten von Giesserei-Kernen - Google Patents
Verfahren und Einrichtung zum Aushärten von Giesserei-Kernen Download PDFInfo
- Publication number
- EP1375031A1 EP1375031A1 EP02024017A EP02024017A EP1375031A1 EP 1375031 A1 EP1375031 A1 EP 1375031A1 EP 02024017 A EP02024017 A EP 02024017A EP 02024017 A EP02024017 A EP 02024017A EP 1375031 A1 EP1375031 A1 EP 1375031A1
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- EP
- European Patent Office
- Prior art keywords
- compressed air
- core
- heating
- mixing stage
- amine
- 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.)
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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
Definitions
- the present invention relates to a method for hardening foundry cores made of sand-containing molding materials, in which the core is hardened in a core mold via a gas-tight coupling to the core mold Fumigation plate a catalyst vapor-carrier gas mixture and following a compressed air flow, each with a specified pressure and a specified one Temperature.
- Such cold-curing processes are known, such as the so-called coldbox process, where the core sand is two components of a synthetic resin system are added, which then harden with the sand as soon as an amine, such as an alkylamine or a methyl formate, is added as a catalyst.
- an amine such as an alkylamine or a methyl formate
- One component could e.g. a polyester resin, a polyether resin or any synthetic resin of liquid consistency with reactive hydroxyl groups his; the second component is definitely an organic isocyanate.
- the two components are thoroughly mixed with the molding sand and then deformed. In order to catalyze the reaction and the handling and to make the use of amines in particular reliable have so far been various efforts have been made.
- the known methods have a common disadvantage in that Hardening process takes a significant amount of time. For example, takes the formation of the core-sand mixture in the mold on a core-shooting machine often only a fraction of a second, whereas the subsequent gassing to harden the core over several seconds has occurred, which of course makes fumigation an enormous cost bearer makes.
- EP 0881 014 by the same applicant describes a method of aforementioned type, in which the valve means a reusable valve in the flow line of the storage container, which temporarily on a return line can be switched over to the storage tank for pressure equalization in the flow system.
- the object of the present invention is now a method for curing Foundry cores from sand-containing molding materials to create which process a significantly reduced fumigation and flushing time with a minimum of necessary Armin guaranteed.
- this is first achieved by that, preferably during the core shot, the amine in liquid form is metered to a heating and mixing stage and is converted there into its gaseous state; that, after gas-tight coupling of the gassing plate, heated compressed air for a time-controlled gassing is passed through the heating and mixing stage loaded with the arming gas within a predetermined time and under proportional pressure rise and from there as a catalyst vapor / carrier gas mixture through the sand-containing molding material in the core Mold is passed through; and that, for a time-controlled purging, heated compressed air is then passed through the fumigated, sand-containing molding material in the core molding tool via separate supply means within a predetermined time.
- the compressed air serving as purge air is additionally is heatable if further before the addition of the amine in liquid form in the Heater and mixing stage in the preliminary pressure equalization is made and if the catalyst vapor-carrier gas mixture on its way to the core mold is accompanied by heat.
- the present invention relates to a device for performing the Process for hardening foundry cores from sand-containing molding materials, which means the core is hardened in a core mold via a gas-tight gassing plate that can be coupled to the core mold or the like.
- this device is characterized in that the amine in liquid form from a storage container by means of a flow meter or the like dosed in a heating and mixing stage and there in its gaseous Condition is transferred, which heater and mixing stage also with a compressed air source via a proportional pressure regulator and a preheater as well Switch valve means is in flow communication for a timed Fumigation heated compressed air within a predetermined time by using to pass through the arming gas-loaded heating and mixing stage, which Heating and mixing stage via a line that can be closed by a valve the core mold, respectively.
- the gassing plate is connected to the catalyst vapor-carrier gas mixture due to the sand-containing molding material in the core mold to pass through, for a time-controlled flushing with the heated compressed air, the compressed air source via the switching valve means and if necessary a reheater and a check valve with the core mold respectively.
- the gassing plate is in flow connection.
- a temperature control can be connected to the preheater and before feeding the amine in liquid form into the heating and mixing stage the flow of the liquid amine tank with the flow meter via a changeover valve temporarily switched to a return line to the storage tank become pressure equalization in the flow system.
- the shown, on a core mold 20 of a core shooting machine, not shown Connectable device for hardening foundry cores made of a sand-containing molding material initially includes one with the Core molding tool 20 gas-tight gassing plate or hood 30 with an upstream heating and mixing stage 17 for transferring the liquid Amine in its gaseous state and to generate one of the fumigation the core-serving catalyst vapor-carrier gas mixture, such as that will be explained in more detail below.
- the amine comes in liquid form from a storage container 4 metered into the heating and mixing stage by means of a flow meter 9 or the like 17 where it is converted to its gaseous state.
- the heater and Mixing stage 17 is also available with a compressed air source 21 via a proportional one Pressure regulator 1 and a preheater 16 and changeover valve means 3 in flow connection, around heated compressed air for a time-controlled gassing a predetermined time by the heating rounds loaded with the arming gas Pass through mixing stage 17, which heater and mixing stage 17 over a line which can be closed and preferably heated by a valve 11 15 with the core molding tool 20 respectively.
- the gassing plate 30 is connected, around the catalyst vapor-carrier gas mixture through the sand-containing molding material to pass through in the core mold 20, for a time-controlled flushing with the heated compressed air, the compressed air source 21 via the switching valve means 3 and optionally a reheater 18 and a check valve 12 with the core mold 20 respectively.
- the gassing plate 30 in flow connection stands.
- the preheater 16 is a variable heatability of the compressed air Temperature control 22 switched on.
- the heater and Mixing stage 17 a temperature control 23 and the reheater 18 one Temperature control 24 switched on.
- the gassing plate 30 is provided with a vent valve 13.
- the relevant switches are in accordance with today's technology and controls can be program controlled via a control circuit 14.
- the amine it is now possible for the amine to be metered in liquid form into a and mixing stage fed and converted there into its gaseous state becomes; that then, after gas-tight coupling of the gassing plate, for one Time-controlled gassing of heated compressed air within a specified time and under proportional pressure increase by those loaded with the arming gas Passed heater and mixing stage and from there as a catalyst vapor-carrier gas mixture due to the sand-containing molding material in the core mold is passed through; and that then heated for a timed flush Compressed air through the fumigated sand within a specified time Molding material is passed through in the core mold.
- the compressed air for fumigation with increasing heating of the catalyst vapor-carrier gas mixture can be heated variably in order to harden the contours to reach.
- the compressed air serving as purge air can additionally heated and further before feeding the amine in liquid form in the Heater and mixing stage in the lead pressure equalization and the catalyst vapor-carrier gas mixture on its way to the core mold be accompanied by heat.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
Description
Für diese Massnahmen aber ist der technische Aufwand enorm und Anlagen dieser Art lassen wenig Variable zu.
dass, vorzugsweise während des Kernschusses, das,Amin in flüssiger Form dosiert einer Erhitzer- und Mischstufe zugeführt und dort in seinen gasförmigen Zustand überführt wird;
dass dann, nach gasdichter Ankopplung der Begasungsplatte, für eine zeitgesteuerte Begasung erhitzte Druckluft innerhalb einer vorgegebenen Zeit und unter proportionalem Druckanstieg durch die mit dem Armingas belasteten Erhitzer- und Mischstufe hindurchgeführt und von dort als Katalysatordampf-Trägergas-Gemisch durch den sandhaltigen Formstoff im Kern-Formwerkzeug hindurchgeleitet wird; und
dass dann für eine zeitgesteuerte Spülung erhitzte Druckluft innerhalb einer vorgegebenen Zeit über separate Zuleitungsmittel durch den begasten sandhaltigen Formstoff im Kern-Formwerkzeug hindurchgeleitet wird.
Claims (8)
- Verfahren zum Aushärten von Giesserei-Kernen aus sandhaltigen Formstoffen, bei welchem der Kern zu seiner Härtung in einem Kern-Formwerkzeug über eine am Kern-Formwerkzeug gasdicht ankoppelbare Begasungsplatte einem Katalysatordampf-Trägergas-Gemisch und nachfolgend einem Druckluftstrom, je mit vorgegebenem Druck und vorgegebener Temperatur, ausgesetzt wird,
dadurch gekennzeichnet, dass, vorzugsweise während des Kernschusses, das Amin in flüssiger Form dosiert einer Erhitzer- und Mischstufe zugeführt und dort in seinen gasförmigen Zustand überführt wird;
dass dann, nach gasdichter Ankopplung der Begasungsplatte, für eine zeitgesteuerte Begasung erhitzte Druckluft innerhalb einer vorgegebenen Zeit und unter proportionalem Druckanstieg durch die mit dem Armingas belasteten Erhitzer- und Mischstufe hindurchgeführt und von dort als Katalysatordampf-Trägergas-Gemisch durch den sandhaltigen Formstoff im Kern-Formwerkzeug hindurchgeleitet wird; und
dass dann für eine zeitgesteuerte Spülung erhitzte Druckluft innerhalb einer vorgegebenen Zeit über separate Zuleitung durch den begasten sandhaltigen Formstoff im Kern-Formwerkzeug hindurchgeleitet wird. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Druckluft für eine Begasung mit steigender Erhitzung des Katalysatordampf-Trägergas-Gemisches variabel erhitzbar ist.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die als Spülluft dienende Druckluft zusätzlich erhitzbar ist.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass vor der Zuführung des Amins in flüssiger Form in die Erhitzer- und Mischstufe im Vorlauf Druckausgleich hergestellt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Katalysatordampf-Trägergas-Gemisch auf seinem Weg zum Kern-Formwerkzeug wärmebegleitet ist.
- Einrichtung zur Durchführung des Verfahrens nach Anspruch 1, zum Aushärten von Giesserei-Kernen aus sandhaltigen Formstoffen, bei welchem der Kern zu seiner Härtung in einem Kern-Formwerkzeug (20) über eine am Kern-Formwerkzeug gasdicht ankoppelbare Begasungsplatte (30) o. dgl. einem Katalysatordampf-Trägergas-Gemisch und nachfolgend einem Druckluftstrom, je mit vorgegebenem Druck und vorgegebener Temperatur, ausgesetzt wird,
dadurch gekennzeichnet, dass das Amin in flüssiger Form aus einem Vorratsbehälter (4) mittels Durchflussmesser (9) o. dgl. dosiert in eine Erhitzer- und Mischstufe (17) gelangt und dort in seinen gasförmigen Zustand überführt wird, welche Erhitzer- und Mischstufe (17) zudem mit einer Druckluftquelle (21) über einen proportionalen Druckregler (1) und einen Vorerhitzer (16) sowie Umschaltventilmittel (3) in Strömungsverbindung steht, um für eine zeitgesteuerte Begasung erhitzte Druckluft innerhalb einer vorgegebenen Zeit und unter proportionalem Druckanstieg durch die mit dem Armingas belasteten Erhitzer- und Mischstufe (17) hindurchzuführen, welche Erhitzerund Mischstufe (17) über eine durch ein Ventil (11) verschliessbare Leitung (15) mit dem Kern-Formwerkzeug (20) resp. der Begasungsplatte (30) verbunden ist, um das Katalysatordampf-Trägergas-Gemisch durch den sandhaltigen Formstoff im Kern-Formwerkzeug (20) hindurchzuleiten, wobei für eine zeitgesteuerte Spülung mit der erhitzten Druckluft die Druckluftquelle (21) über die Umschaltventilmittel (3) und gegebenenfalls einem Nacherhitzer (18) und einem Sperrventil (12) mit dem Kern-Formwerkzeug (20) resp. der Begasungsplatte (30)in Strömungsverbindung steht. - Einrichtung nach Anspruch 6, dadurch gekennzeichnet, dass für eine variable Erhitzbarkeit der Druckluft dem Vorerhitzer (16) eine Temperatursteuerung (22) zugeschaltet ist.
- Einrichtung nach Anspruch 6, dadurch gekennzeichnet, dass vor der Zuführung des Amins in flüssiger Form in die Erhitzer- und Mischstufe (17) der Vorlauf (25) des Flüssig-Amin-Behälters (4) mit dem Durchflussmesser (9) über ein Umschaltventil (10) temporär auf eine Rücklaufleitung (26) zum Vorlagebehälter (4) umschaltbar ist zum Druckausgleich im Vorlaufsystem.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01034/02A CH695547A5 (de) | 2002-06-17 | 2002-06-17 | Verfahren und Einrichtung zum Aushärten von Giesserei-Kernen. |
CH10342002 | 2002-06-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1375031A1 true EP1375031A1 (de) | 2004-01-02 |
EP1375031B1 EP1375031B1 (de) | 2006-06-28 |
Family
ID=29716489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02024017A Expired - Lifetime EP1375031B1 (de) | 2002-06-17 | 2002-10-28 | Verfahren und Einrichtung zum Aushärten von Giesserei-Kernen |
Country Status (8)
Country | Link |
---|---|
US (1) | US7036552B2 (de) |
EP (1) | EP1375031B1 (de) |
CN (1) | CN1283389C (de) |
AT (1) | ATE331576T1 (de) |
CH (1) | CH695547A5 (de) |
DE (1) | DE50207380D1 (de) |
ES (1) | ES2267924T3 (de) |
WO (1) | WO2003106072A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1849537A1 (de) * | 2006-04-24 | 2007-10-31 | Lüber GmbH | Verfahren und Einrichtung zum Aushärten von anorganischen Giesserei-Kernen und -Formen |
WO2020043714A1 (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 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102527932B (zh) * | 2010-12-28 | 2014-05-07 | 苏州明志科技有限公司 | 铸造用树脂型砂固化装置 |
MX343917B (es) * | 2011-07-19 | 2016-10-28 | Ask Chemicals Lp | Método para curar el moldeo de fundición de caja fría con catalizador gaseoso. |
CN102430723B (zh) * | 2011-12-26 | 2013-04-24 | 冯新林 | 三乙胺气体发生与循环利用系统 |
CN103521708A (zh) * | 2013-08-16 | 2014-01-22 | 苏州明志科技有限公司 | 用于冷芯机的气体发生器催化剂定量控制方法及装置 |
PL2848332T3 (pl) * | 2013-09-11 | 2016-01-29 | Lueber Gmbh | Urządzenie i sposób do utwardzania rdzeni odlewniczych |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH603276A5 (de) * | 1975-10-02 | 1978-08-15 | Werner Lueber | |
EP0229959A1 (de) * | 1985-12-19 | 1987-07-29 | Werner Lüber | Einrichtung zum Aushärten von Giesserei-Kernen |
EP0881014A1 (de) * | 1997-05-27 | 1998-12-02 | Lüber GmbH | Einrichtung zum Aushärten von Giesserei-Kernen |
WO1999043456A2 (en) * | 1998-02-10 | 1999-09-02 | Dean Anthony Jones | Heater for gaseous substances and core production with such a heater |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4132260A (en) * | 1975-10-02 | 1979-01-02 | Werner Luber | Method and apparatus for hardening of foundry cores |
US4362204A (en) * | 1980-03-17 | 1982-12-07 | The Mead Corporation | Method and apparatus for curing a foundry core |
US4483384A (en) * | 1980-06-02 | 1984-11-20 | Michel Horst Werner | Apparatus for hardening mold parts made of sand for making metal castings |
US4467855A (en) * | 1981-11-12 | 1984-08-28 | Sintokogio Ltd. | Method of making mold |
-
2002
- 2002-06-17 CH CH01034/02A patent/CH695547A5/de not_active IP Right Cessation
- 2002-10-28 DE DE50207380T patent/DE50207380D1/de not_active Expired - Lifetime
- 2002-10-28 EP EP02024017A patent/EP1375031B1/de not_active Expired - Lifetime
- 2002-10-28 ES ES02024017T patent/ES2267924T3/es not_active Expired - Lifetime
- 2002-10-28 AT AT02024017T patent/ATE331576T1/de not_active IP Right Cessation
-
2003
- 2003-06-11 WO PCT/CH2003/000368 patent/WO2003106072A1/de active Application Filing
- 2003-06-11 CN CNB038017822A patent/CN1283389C/zh not_active Expired - Fee Related
- 2003-06-11 US US10/498,676 patent/US7036552B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH603276A5 (de) * | 1975-10-02 | 1978-08-15 | Werner Lueber | |
EP0229959A1 (de) * | 1985-12-19 | 1987-07-29 | Werner Lüber | Einrichtung zum Aushärten von Giesserei-Kernen |
EP0881014A1 (de) * | 1997-05-27 | 1998-12-02 | Lüber GmbH | Einrichtung zum Aushärten von Giesserei-Kernen |
WO1999043456A2 (en) * | 1998-02-10 | 1999-09-02 | Dean Anthony Jones | Heater for gaseous substances and core production with such a heater |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1849537A1 (de) * | 2006-04-24 | 2007-10-31 | Lüber GmbH | Verfahren und Einrichtung zum Aushärten von anorganischen Giesserei-Kernen und -Formen |
WO2020043714A1 (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 |
Also Published As
Publication number | Publication date |
---|---|
CH695547A5 (de) | 2006-06-30 |
EP1375031B1 (de) | 2006-06-28 |
CN1606478A (zh) | 2005-04-13 |
DE50207380D1 (de) | 2006-08-10 |
US20050077023A1 (en) | 2005-04-14 |
ES2267924T3 (es) | 2007-03-16 |
CN1283389C (zh) | 2006-11-08 |
WO2003106072A1 (de) | 2003-12-24 |
US7036552B2 (en) | 2006-05-02 |
ATE331576T1 (de) | 2006-07-15 |
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