EP0881014B1 - Dispositif pour durcir les noyaux en sable - Google Patents

Dispositif pour durcir les noyaux en sable Download PDF

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Publication number
EP0881014B1
EP0881014B1 EP97108678A EP97108678A EP0881014B1 EP 0881014 B1 EP0881014 B1 EP 0881014B1 EP 97108678 A EP97108678 A EP 97108678A EP 97108678 A EP97108678 A EP 97108678A EP 0881014 B1 EP0881014 B1 EP 0881014B1
Authority
EP
European Patent Office
Prior art keywords
catalyst
core
block
evaporator part
shaped evaporator
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.)
Expired - Lifetime
Application number
EP97108678A
Other languages
German (de)
English (en)
Other versions
EP0881014A1 (fr
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
Luber GmbH
Original Assignee
Lueber GmbH
Luber 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 US08/863,913 priority Critical patent/US5971056A/en
Priority to CZ19971654A priority patent/CZ289410B6/cs
Application filed by Lueber GmbH, Luber GmbH filed Critical Lueber GmbH
Priority to ES97108678T priority patent/ES2163064T3/es
Priority to EP97108678A priority patent/EP0881014B1/fr
Priority to DE59704789T priority patent/DE59704789D1/de
Priority to AT97108678T priority patent/ATE206333T1/de
Publication of EP0881014A1 publication Critical patent/EP0881014A1/fr
Application granted granted Critical
Publication of EP0881014B1 publication Critical patent/EP0881014B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 device for hardening foundry cores from a mass containing sand, in which the core to its Hardening in the core molding tool one enriched with a catalyst Gas flow and possibly subsequently exposed to a compressed air flow is, with a mixing stage upstream of the core molding tool for generation a catalyst vapor-carrier gas mixture, which is program-controlled Valve means, pump means and flow meter with a catalyst reservoir as well as with a program-controlled compressed air source in flow connection stands, see EP 0 168 635 A.
  • Such devices are known and allow cold curing processes such as for example the so-called cold box process, in which the core sand has two components a synthetic resin system are added, which then with the sand cure as soon as an amine, such as an alkylamine or a methyl formate, as a catalyst is added.
  • a synthetic resin system such as an alkylamine or a methyl formate, as a catalyst is added.
  • One component could e.g. a polyester resin, a polyether resin or any synthetic resin with a liquid consistency be with reactive hydroxyl groups; the second component is definitely a organic isocyanate.
  • the two components are made with the molding sand mixed thoroughly and then deformed. In order to catalyze the reaction here and the handling and use of the amines in particular are reliable various efforts have been made so far.
  • 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 taken place, which naturally makes fumigation an enormous cost bearer.
  • valve means Form a two-way valve in the flow line of the storage tank and this is temporarily switchable to a return line to the reservoir Pressure equalization in the flow system.
  • valve means as well as the other switching and control elements of the device programmable.
  • porous ceramics have a very large inner surface, which is completely wetted by the inflowing catalyst, after which the inflowing carrier gas, usually air, in the most intensive contact with the wetted surface comes and so an optimal discharge of the catalyst in the core causes what a corresponding reductone of the amount of catalyst allowed.
  • Such a ceramic evaporator can be made of silicon carbite, aluminum oxide, zirconium oxide oder-Carbit exist and be chrome-active nickel-plated.
  • Its flow can be in pressure steps or with a proportional increase in pressure respectively.
  • the block-shaped ceramic part a permanent magnet is arranged.
  • the ceramic body be enriched with iron oxide.
  • These units as well as others, such as one that can be added to the mixing stage Continuous-flow heater 11 and temperature sensor 12 are via a Control level 13 programmable.
  • valve means 2 are now in the feed line 7 of the storage container 5 temporarily switchable to a return line 8 to the reservoir 5 for pressure equalization in the flow system, as the above in detail has been described.
  • a permanent magnet 14 can be effective on the ceramic body 9.
  • the metering valve 2 becomes dependent the signal of the flow meter 4 or time-dependent via the control stage 13 switched, after which the catalyst enters the mixing stage. At the same time or afterwards the transport air is then supplied and then the mixture, if appropriate via a flow heater 11, passed to the core. After that you can purge air can be supplied as required.
  • the porous ceramic vaporizer also allows optimal discharge of the catalyst in the core and accordingly a substantial reduction the amount of catalyst as stated above. Further is achieved that corresponds to the large air flow through the ceramic evaporator the catalyst is gradually transported into the core, so that residual amines reach the core when it has already hardened is what significantly improves its surface hardness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Catalysts (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Mold Materials And Core Materials (AREA)
  • Casting Devices For Molds (AREA)
  • Magnetic Heads (AREA)

Claims (8)

  1. Installation pour durcir les noyaux de fonderie d'une masse contenant du sable, où le noyau, en vue de son durcissement dans l'outil de moulage de noyau, est exposé à un flux de gaz enrichi d'un catalyseur et le cas échéant ensuite à un flux d'air comprimé, avec un étage mélangeur (1) pouvant être monté en amont de l'outil de moulage de noyau pour la production d'un mélange de vapeur de catalyseur et de gaz entraíneur qui est en liaison d'écoulement par des moyens de vanne (2) commandés par programme, des moyens de pompe (3) et des débitmètres (4) avec un récipient collecteur de catalyseur (5) et avec une source d'air comprimé (6) commandée par programme, caractérisée en ce que les moyens de vanne (2) forment une vanne à deux voies dans la canalisation d'aller (7) du récipient collecteur (5) et en ce que celle-ci peut être commutée temporairement à une canalisation de retour (8) vers le récipient collecteur (5), pour la compensation de la pression dans le système d'aller.
  2. Installation selon la revendication 1, caractérisée en ce qu'il est disposé dans l'étage mélangeur (1) une pièce d'évaporateur (9) en forme de bloc en céramique poreuse.
  3. Installation selon la revendication 2, caractérisée en ce que la pièce d'évaporateur (9) en forme de bloc en céramique poreuse est nickelée de manière active avec le chrome.
  4. Installation selon la revendication 2, caractérisée en ce que la pièce d'évaporateur (9) en forme de bloc en céramique poreuse est enrichie avec de l'oxyde de fer.
  5. Installation selon la revendication 2, caractérisée en ce que la pièce d'évaporateur (9) en forme de bloc est constituée de carbure de silicium ou d'oxyde d'aluminium ou d'oxyde ou de carbure de zirconium.
  6. Installation selon la revendication 4, caractérisée en ce qu'un aimant permanent (14) est actif à la pièce d'évaporateur (9) en forme de bloc en céramique poreuse.
  7. Installation selon la revendication 2, caractérisée en ce que le passage à travers la pièce d'évaporateur (9) en forme de bloc a lieu selon des paliers de pression ou selon une augmentation de pression proportionnelle.
  8. Utilisation de l'installation selon la revendication 1 à une machine à tirer les noyaux.
EP97108678A 1997-05-27 1997-05-30 Dispositif pour durcir les noyaux en sable Expired - Lifetime EP0881014B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US08/863,913 US5971056A (en) 1997-05-27 1997-05-27 Device for hardening foundry cores and use thereof
CZ19971654A CZ289410B6 (cs) 1997-05-27 1997-05-28 Zařízení k vytvrzování slévárenských jader
ES97108678T ES2163064T3 (es) 1997-05-27 1997-05-30 Instalacion para el endurecimiento de machos de arena.
EP97108678A EP0881014B1 (fr) 1997-05-27 1997-05-30 Dispositif pour durcir les noyaux en sable
DE59704789T DE59704789D1 (de) 1997-05-27 1997-05-30 Einrichtung zum Aushärten von Giesserei-Kernen
AT97108678T ATE206333T1 (de) 1997-05-27 1997-05-30 Einrichtung zum aushärten von giesserei-kernen

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/863,913 US5971056A (en) 1997-05-27 1997-05-27 Device for hardening foundry cores and use thereof
CZ19971654A CZ289410B6 (cs) 1997-05-27 1997-05-28 Zařízení k vytvrzování slévárenských jader
EP97108678A EP0881014B1 (fr) 1997-05-27 1997-05-30 Dispositif pour durcir les noyaux en sable

Publications (2)

Publication Number Publication Date
EP0881014A1 EP0881014A1 (fr) 1998-12-02
EP0881014B1 true EP0881014B1 (fr) 2001-10-04

Family

ID=27179637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97108678A Expired - Lifetime EP0881014B1 (fr) 1997-05-27 1997-05-30 Dispositif pour durcir les noyaux en sable

Country Status (6)

Country Link
US (1) US5971056A (fr)
EP (1) EP0881014B1 (fr)
AT (1) ATE206333T1 (fr)
CZ (1) CZ289410B6 (fr)
DE (1) DE59704789D1 (fr)
ES (1) ES2163064T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10231883A1 (de) * 2002-07-12 2004-02-12 J. Eberspächer GmbH & Co. KG Verdampferanordnung, insbesondere zur Erzeugung eines in einem Reformer zur Wasserstoffgewinnung zersetzbaren Kohlenwasserstoff/Mischmaterial-Gemisches

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6505671B1 (en) * 2000-12-28 2003-01-14 Hayes Lemmerz International, Inc. Method for producing a sand core
US6520244B2 (en) * 2001-03-14 2003-02-18 Ford Global Technologies, Inc. Method and apparatus for curing foundry cores
CH695547A5 (de) * 2002-06-17 2006-06-30 Lueber Gmbh Verfahren und Einrichtung zum Aushärten von Giesserei-Kernen.
US20050082331A1 (en) * 2003-10-17 2005-04-21 Chi-Hong Yang Tempered glass breaker
US20080060763A1 (en) * 2006-09-11 2008-03-13 Kenn Bishop Tire bead breaking tool and method of use
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
ES2550337T3 (es) 2013-09-11 2015-11-06 Lüber GmbH Dispositivo y procedimiento para el endurecimiento de núcleos de fundición
CN103949583B (zh) * 2014-04-22 2016-08-17 重庆长江造型材料（集团）股份有限公司 热风装置控制系统

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1269202A (en) * 1968-02-14 1972-04-06 Fordath Ltd Improvements in the production of cores for use in the production of metal castings
DE2025253C3 (de) * 1970-05-23 1975-10-02 Guenther 7012 Schmiden Doll Verfahren und Einrichtung zum Herstellen von Kernen oder Sandformen
DE2162137C2 (de) * 1971-12-15 1983-01-13 Horst-Werner Ing.(Grad.) 7707 Engen Michel Anlage zum Aushärten von Sandformen und -kernen für Gießereizwecke
DE2413537C2 (de) * 1974-03-21 1984-11-15 Horst-Werner Ing.(Grad.) 7707 Engen Michel Vorrichtung zum Herstellen von Kernen für Gießereizwecke
DE2621153A1 (de) * 1976-05-13 1977-11-24 Daimler Benz Ag Verfahren und einrichtung zum aushaerten von sandformkoerpern
WO1980001255A1 (fr) * 1978-12-22 1980-06-26 W Lueber Procede pour durcir des moules de forme en sable
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
DE3135510A1 (de) * 1981-09-08 1983-03-24 Horst-Werner Ing.(Grad.) 7707 Engen Michel Einrichtung zum aushaerten von aus sand unter beigabe von aushaertbaren bindemitteln hergestellten kernen und/oder formen
DE3340762C2 (de) * 1983-11-10 1986-10-02 Horst Werner Dipl.-Ing. 7707 Engen Michel Verfahren und Vorrichtung zum Aushärten von aus Sand unter Verwendung eines Bindemittels hergestellten Kernen und/oder Formen, die zum Gießen von Formkörpern aus metallischen oder nicht metallischen schmelzflüssigen Ausgangsmaterialien Verwendung finden
US4540531A (en) * 1984-05-04 1985-09-10 Ashland Oil, Inc. Vapor generator and its use in generating vapors in a pressurized gas
DE3422742A1 (de) * 1984-06-19 1985-12-19 Michel, Horst Werner, Dipl.-Ing., 7707 Engen Steuerung fuer eine vorrichtung zum aushaerten von sandkernen und/oder -formen
CH667821A5 (en) * 1985-08-02 1988-11-15 Werner Lueber Appts. for hardening casting cores - having time valves controlling the flow of air and hardener gas through core box
CH670405A5 (fr) * 1985-12-19 1989-06-15 Werner Lueber
CH674480A5 (fr) * 1987-10-02 1990-06-15 Franz Gaehler
DE4112701A1 (de) * 1991-04-18 1992-10-22 Dossmann Gmbh Eisengiesserei U Verfahren und vorrichtung der herstellung von sandkernen fuer den metallguss
DE4213845C2 (de) * 1992-04-28 1997-01-09 Hottinger Adolf Masch Vorrichtung zum separaten Begasen von porösen Gießereikernen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10231883A1 (de) * 2002-07-12 2004-02-12 J. Eberspächer GmbH & Co. KG Verdampferanordnung, insbesondere zur Erzeugung eines in einem Reformer zur Wasserstoffgewinnung zersetzbaren Kohlenwasserstoff/Mischmaterial-Gemisches
DE10231883B4 (de) * 2002-07-12 2008-01-17 J. Eberspächer GmbH & Co. KG Verdampferanordnung, insbesondere zur Erzeugung eines in einem Reformer zur Wasserstoffgewinnung zersetzbaren Kohlenwasserstoff/Mischmaterial-Gemisches

Also Published As

Publication number Publication date
ATE206333T1 (de) 2001-10-15
EP0881014A1 (fr) 1998-12-02
ES2163064T3 (es) 2002-01-16
CZ165497A3 (cs) 1998-12-16
CZ289410B6 (cs) 2002-01-16
US5971056A (en) 1999-10-26
DE59704789D1 (de) 2001-11-08

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