EP0687514A1 - Procédé et installation pour régénérer les sables de moulage - Google Patents

Procédé et installation pour régénérer les sables de moulage Download PDF

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Publication number
EP0687514A1
EP0687514A1 EP95105892A EP95105892A EP0687514A1 EP 0687514 A1 EP0687514 A1 EP 0687514A1 EP 95105892 A EP95105892 A EP 95105892A EP 95105892 A EP95105892 A EP 95105892A EP 0687514 A1 EP0687514 A1 EP 0687514A1
Authority
EP
European Patent Office
Prior art keywords
sand
gap
friction elements
elements
plate
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.)
Granted
Application number
EP95105892A
Other languages
German (de)
English (en)
Other versions
EP0687514B1 (fr
Inventor
Christian Renner
Jovo Laskovic
Näf Xaver
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.)
Georg Fischer Giessereianlagen AG
Original Assignee
Georg Fischer Giessereianlagen AG
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
Application filed by Georg Fischer Giessereianlagen AG filed Critical Georg Fischer Giessereianlagen AG
Publication of EP0687514A1 publication Critical patent/EP0687514A1/fr
Application granted granted Critical
Publication of EP0687514B1 publication Critical patent/EP0687514B1/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
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/02—Dressing by centrifuging essentially or additionally
    • 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
    • B22C5/18—Plants for preparing mould materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/10—Foundry sand treatment

Definitions

  • the invention relates to a method and a device for the regeneration of predominantly synthetic resin-bonded foundry sand, but also of thermally stressed bentonite-bonded molding sand for reuse instead of new sand by mechanical separation of the grain from portions of the binding materials.
  • a device has become known (DE 29 09 408 A1), which has a lying, revolving drum and an impact rotor arranged in the interior thereof in the area of a waste sand downflow.
  • the sand is scrubbed by accelerating abruptly when it hits the impact tool and throwing it into the sand curtain or sand sump, whereby an intense grain of grain friction occurs.
  • the disadvantage of this device is that the sand is only regenerated in batches.
  • the object of the present invention is to provide a method and a device in which the grains of sand can be gently cleaned by repeated rubbing and continuous regeneration of the sand is possible.
  • the device should be structurally simple to implement in order to achieve optimal economy.
  • the main advantage of the invention is that the old sand is regenerated by gently rubbing the grains together. There is no impact or impact treatment.
  • the problem-free and maintenance-free process of the regeneration is achieved in that the area of the facility that is at risk of wear is equipped with wear elements.
  • the drive shaft which is designed as a hollow shaft, also serves as an extraction system, through which the worn binder parts and the dust are continuously extracted.
  • the cleaning intensity can be changed by various structural designs of the wearing elements and the cleaning effect is thereby improved.
  • the binder casing which is statically charged by grain to grain friction, is electrically discharged between the cleaning stages on guide elements. This makes it easier to clean the sand.
  • the area of the gap 16 between the plate 7 and the cylinder 9 is shown on an enlarged scale.
  • radial friction elements 20 are arranged on the mutually facing surfaces of the plate 7 and the cylinder 9, radial friction elements 20 are arranged.
  • the friction elements 20 have a crowned cross section. They are connected to the plate 7 or the cylinder 9 interchangeably, for example by a threaded piece 21 and a nut 22.
  • the friction elements 20 are preferably made of a wear-resistant material such as Ceramics, chilled cast iron, hard metal, metal with hard coating, etc. are manufactured. The intensity of the friction can be changed by means of various structural designs of the friction elements 20.
  • the areas at risk of wear are provided with wear protection 23.
  • FIGS. 3 and 4 A further embodiment variant of the gap geometry is shown in FIGS. 3 and 4.
  • the friction elements 20 have a rectangular cross section. They are arranged in such a way that they do not protrude into the gap 16, or do so only insignificantly.
  • the sand to be treated is preferably passed continuously through the sand feed 11 into the cylinder 9 and forms a standing sand column in it, which is torn open in the area of the gap by the rotary movement of the plate 7.
  • a standing sand column in it, which is torn open in the area of the gap by the rotary movement of the plate 7.
  • the centrifugal force drives the sand in this separation plane in the direction of the gap 16.
  • the sand is pressed through the gap 16 in such a way that the geometric design of the gap 16 and the rotary movement of the plate 7 result in a renewed and more intense grain of grain friction.
  • the sand falls out of the gap 16 onto the guide element 8 and onto the guide element 6.
  • the guide element 6 is designed as a cathode.
  • the sand which has a statically charged binder casing due to the friction, is electrically discharged when it hits the guide element 6. This can make the sand more effective be treated further.
  • the sand treated in this way either falls into a further cleaning stage or into the sand removal device 12 and is fed back into the sand circuit via the pipe 14.
  • the dust generated during the grain-to-grain friction and the abraded binder components are continuously extracted through the hollow shaft 10 by means of the suction through openings 17 which are provided in the hollow shaft in the region of the plates 5, 7.
  • the suction is carried out by a weak vacuum.
  • inlet openings 18 are provided, through which a supply of air for the suction is made possible even during the regeneration process.
  • the drive of the plate 5 is designed so that the regeneration units can be operated at different, continuously adjustable speeds.
  • a speed of 300-1500 rpm has proven to be particularly favorable.
  • the device is equipped with a cleaning stage and the sand is circulated through the cleaning stage as often as desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Processing Of Solid Wastes (AREA)
  • Centrifugal Separators (AREA)
EP95105892A 1994-06-15 1995-04-20 Procédé et installation pour régénérer les sables de moulage Expired - Lifetime EP0687514B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH188594 1994-06-15
CH1885/94 1994-06-15
CH188594A CH686411A5 (de) 1994-06-15 1994-06-15 Verfahren und Vorrichtung zur Regenerierung von Giessereialtsand.

Publications (2)

Publication Number Publication Date
EP0687514A1 true EP0687514A1 (fr) 1995-12-20
EP0687514B1 EP0687514B1 (fr) 1999-11-17

Family

ID=4220878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105892A Expired - Lifetime EP0687514B1 (fr) 1994-06-15 1995-04-20 Procédé et installation pour régénérer les sables de moulage

Country Status (7)

Country Link
US (1) US5706879A (fr)
EP (1) EP0687514B1 (fr)
BR (1) BR9502794A (fr)
CH (1) CH686411A5 (fr)
CZ (1) CZ82795A3 (fr)
DE (1) DE59507231D1 (fr)
HU (1) HU215811B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1025926A3 (fr) * 1999-02-08 2000-08-23 Sintokogio, Ltd. Procédé et appareil pour la récupération de sable de fonderie
CN105921690A (zh) * 2016-05-26 2016-09-07 合肥市田源精铸有限公司 一种呋喃树脂自硬砂的处理方法
CN105945217A (zh) * 2016-05-26 2016-09-21 合肥市田源精铸有限公司 一种酚醛树脂自硬砂的处理方法
CN106001400A (zh) * 2016-05-26 2016-10-12 合肥市田源精铸有限公司 一种呋喃树脂自硬砂的制备方法
CN106001401A (zh) * 2016-05-26 2016-10-12 合肥市田源精铸有限公司 一种酚醛树脂自硬砂旧砂的再生处理方法
CN106040969A (zh) * 2016-05-26 2016-10-26 合肥市田源精铸有限公司 一种酚醛树脂自硬砂的制备方法
CN107597386A (zh) * 2017-10-10 2018-01-19 湖州壤之沃生物技术有限公司 一种用于膨润土生产的粉碎装置

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1048923C (zh) * 1995-07-18 2000-02-02 陈元孝 无球磨机
JP3991179B2 (ja) 1998-12-11 2007-10-17 日本鋳造株式会社 鋳物砂再生装置
JP3329779B2 (ja) 1999-11-30 2002-09-30 新東工業株式会社 鋳物砂の再生装置
JP3329757B2 (ja) 1999-02-08 2002-09-30 新東工業株式会社 鋳物砂の再生方法及び再生装置
US6248683B1 (en) 1999-04-07 2001-06-19 Silicycle Inc. Process for the regeneration of used silica gel
EP1222978A3 (fr) * 2001-01-15 2007-10-17 Sintokogio, Ltd. Procédé pour préparer du sable enrobé de bentonite, le sable ainsi obtenu, et procédé de recyclage du sable de moulage pour fabriquer des moules en utilisant le sable enrobé
US7147034B2 (en) * 2001-04-05 2006-12-12 Clayton Thermal Processes Limited Reclamation treatment of bonded particulates
US6631808B2 (en) 2001-08-07 2003-10-14 Particle And Coating Technologies, Inc. Air classifier system for the separation of particles
US6691765B2 (en) 2001-08-07 2004-02-17 Noram Technology, Ltd. Products for the manufacture of molds and cores used in metal casting and a method for their manufacture and recycle from crushed rock
KR100402412B1 (ko) * 2001-10-25 2003-11-01 기원금속(주) 주물사 재생장치 및 그 재생방법
US7896269B2 (en) * 2008-02-28 2011-03-01 Elsing Robert J Apparatus and method for collecting and crushing seashells on a beach
CN119793656B (zh) * 2025-01-24 2025-10-28 中国电建集团贵阳勘测设计研究院有限公司 一种砂石料的降尘加工方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782643A (en) * 1971-01-21 1974-01-01 Carborundum Co Apparatus for conditioning a granular material
DE2456613B1 (de) * 1974-08-16 1976-02-12 Fischer Ag Georg Einrichtung zum kontinuierlichen aufbereiten von koernigem material
DE2408981B2 (de) * 1974-02-25 1979-03-15 Alb. Klein Kg, 5241 Niederfischbach Verfahren zur Reinigung von Schüttgütern durch Zentrifugalkräfte sowie Vorrichtung zur Durchführung des Verfahrens
EP0053882A1 (fr) * 1980-12-02 1982-06-16 Taiyo Chuki Co., Ltd. Dispositif de régénération de sable de fonderie
EP0576922A1 (fr) * 1992-07-01 1994-01-05 Georg Fischer Giessereianlagen Ag Procédé et dispositif pour la régénération de sable de fonderie

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US315143A (en) * 1885-04-07 Machine for breaking wheat
US1393092A (en) * 1918-05-02 1921-10-11 American Steel Foundries Method of and means for reclaiming molding-sand
US2580579A (en) * 1946-09-05 1952-01-01 Allis Chalmers Mfg Co Combination disk and impact grinding mill
US3312403A (en) * 1964-12-31 1967-04-04 Zifferer Lothar Robert Machine and process for reclaiming foundry sand
US3982702A (en) * 1975-03-06 1976-09-28 The Carborundum Company Sand lump grinder
SU784971A1 (ru) * 1978-07-31 1980-12-07 Всесоюзный научно-исследовательский проектно-технологический институт вагоностроения Устройство дл регенерации обработанных формовочных и стержневых смесей
JPS5619947A (en) * 1979-07-25 1981-02-25 Hitachi Ltd Method and apparatus for reclamation of used molding sand
US4436138A (en) * 1980-07-23 1984-03-13 Nippon Chuzo Kabushiki Kaisha Method of and apparatus for reclaiming molding sand
SU1379069A1 (ru) * 1986-09-12 1988-03-07 Ворошиловградский машиностроительный институт Устройство дл механической регенерации отработанных формовочных и стержневых смесей
SU1611546A1 (ru) * 1988-03-09 1990-12-07 Ворошиловградский машиностроительный институт Устройство дл регенерации литейных песков
FR2696360B1 (fr) * 1992-10-07 1994-12-23 Fm Ind Installation de régénération par traitement mécanique de particules enrobées d'une gangue.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782643A (en) * 1971-01-21 1974-01-01 Carborundum Co Apparatus for conditioning a granular material
DE2408981B2 (de) * 1974-02-25 1979-03-15 Alb. Klein Kg, 5241 Niederfischbach Verfahren zur Reinigung von Schüttgütern durch Zentrifugalkräfte sowie Vorrichtung zur Durchführung des Verfahrens
DE2456613B1 (de) * 1974-08-16 1976-02-12 Fischer Ag Georg Einrichtung zum kontinuierlichen aufbereiten von koernigem material
EP0053882A1 (fr) * 1980-12-02 1982-06-16 Taiyo Chuki Co., Ltd. Dispositif de régénération de sable de fonderie
EP0576922A1 (fr) * 1992-07-01 1994-01-05 Georg Fischer Giessereianlagen Ag Procédé et dispositif pour la régénération de sable de fonderie

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1025926A3 (fr) * 1999-02-08 2000-08-23 Sintokogio, Ltd. Procédé et appareil pour la récupération de sable de fonderie
CN105921690A (zh) * 2016-05-26 2016-09-07 合肥市田源精铸有限公司 一种呋喃树脂自硬砂的处理方法
CN105945217A (zh) * 2016-05-26 2016-09-21 合肥市田源精铸有限公司 一种酚醛树脂自硬砂的处理方法
CN106001400A (zh) * 2016-05-26 2016-10-12 合肥市田源精铸有限公司 一种呋喃树脂自硬砂的制备方法
CN106001401A (zh) * 2016-05-26 2016-10-12 合肥市田源精铸有限公司 一种酚醛树脂自硬砂旧砂的再生处理方法
CN106040969A (zh) * 2016-05-26 2016-10-26 合肥市田源精铸有限公司 一种酚醛树脂自硬砂的制备方法
CN107597386A (zh) * 2017-10-10 2018-01-19 湖州壤之沃生物技术有限公司 一种用于膨润土生产的粉碎装置
CN107597386B (zh) * 2017-10-10 2019-07-09 湖州壤之沃生物技术有限公司 一种用于膨润土生产的粉碎装置

Also Published As

Publication number Publication date
BR9502794A (pt) 1996-02-06
CH686411A5 (de) 1996-03-29
HUT76771A (en) 1997-11-28
CZ82795A3 (en) 1996-01-17
HU9501737D0 (en) 1995-08-28
HU215811B (hu) 1999-02-01
DE59507231D1 (de) 1999-12-23
US5706879A (en) 1998-01-13
EP0687514B1 (fr) 1999-11-17

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