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EP0687514B1 - Verfahren und Vorrichtung zur Regenerierung von Giessereialtsand - Google Patents

Verfahren und Vorrichtung zur Regenerierung von Giessereialtsand Download PDF

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Publication number
EP0687514B1
EP0687514B1 EP95105892A EP95105892A EP0687514B1 EP 0687514 B1 EP0687514 B1 EP 0687514B1 EP 95105892 A EP95105892 A EP 95105892A EP 95105892 A EP95105892 A EP 95105892A EP 0687514 B1 EP0687514 B1 EP 0687514B1
Authority
EP
European Patent Office
Prior art keywords
sand
container
gap
friction elements
friction
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
EP95105892A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0687514A1 (de
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/de
Application granted granted Critical
Publication of EP0687514B1 publication Critical patent/EP0687514B1/de
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 an apparatus for Regeneration of predominantly synthetic resin-bound foundry sand, but also of thermally stressed bentonite-bound Molding sand for reuse instead of using new sand mechanical separation of the grain of sand from parts of the Binding agents.
  • a device for this has become known (DE 29 09 408 A1), which has a lying, revolving drum and one inside the same arranged in the area of a waste sand downflow Striking rotor.
  • this device the sand scrubbed by hitting the striking tool suddenly accelerated and into the sand curtain or sand sump is thrown, creating an intense grain of grain friction arises.
  • the disadvantage of this device is that the sand is only regenerated in batches.
  • DE-B-24 08 981 describes a method and an apparatus for Cleaning foundry sand, which has become known rotating plate is provided with an upstanding wall. There is a gap between the wall and the plate, through which the sand is thrown. The one from the gap hurled sand hits the housing wall, and forms a sand bed on the housing wall.
  • the one described here Device allows only one continuous cleaning process.
  • a major advantage of the invention is that the Used sand is regenerated by rubbing the grains together. It there is no impact or impact treatment.
  • the constructive design of the facility is multiple Repetition of the grain on grain friction can be easily realized, by switching several cleaning stages in a row are.
  • Fig.1 is a sand regeneration device for mechanical Cleaning sand grains, especially organic and inorganic bound molded sands.
  • a container in the form of a cylinder 9 is arranged on a frame 1 .
  • the cylinder 9 has a lid 13 on which a sand feed 11 is arranged.
  • sand holding elements 19 On the inner wall of the cylinder 9 are arranged sand holding elements 19, which rotate the Prevent sand column in the cylinder.
  • a sand removal device 12 in the form of a funnel, which opens into a tube 14.
  • a central drive shaft 10 is arranged, which in a suction nozzle 15 ends.
  • the suction nozzle 15 is short Pipe piece formed with a connecting flange at the end and also serves as a connection to a suction unit.
  • a bearing unit 2 attached, which via a belt drive 3 from a motor 4 is driven.
  • the drive shaft 10 is as Hollow shaft trained.
  • the plate 7 is arranged below the cylinder 9, wherein the plate 7 is at a certain distance from the cylinder 9. This results in a gap 16 between plates 7 and Cylinder 9.
  • the gap width is by means of an adjustment device (24,25) continuously adjustable, the adjustment preferably is operated mechanically.
  • the friction elements 20 have a crowned shape Cross section on. You are with the plate 7 and the cylinder 9th for example by a threaded piece 21 and a nut 22 interchangeably connected. Because of increased risk of wear are the friction elements 20 preferably made of a wear-resistant Material such as Ceramics, chilled cast iron, hard metal, metal made with hard coating, etc. Through various constructive Designs of the friction elements 20 can reduce the friction intensity to be changed. The areas at risk from wear are provided with wear protection 23.
  • the friction elements 20 have a rectangular Cross section on. They are arranged so that they are not or protrude only slightly into the gap 16.
  • the sand to be treated is preferably continuously by the Sand feed 11 directed into the cylinder 9 and forms in this a standing sand column that passes through in the area of the gap the rotational movement of the plate 7 is torn open.
  • the proportion of sand on the plate 7 creates an intense grain on grain friction.
  • the centrifugal force drives the sand in it Separation level in the direction of gap 16.
  • the sand is thus through the Gap 16 pressed that by the geometric design of the Gap 16 and by the rotary movement of the plate 7 one more time and more intense grain to grain friction takes place. Of 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 is a statically charged by the friction Binder cover has, when hitting the guide element 6 electrically discharged. This can make the sand more effective be treated further.
  • the sand treated in this way falls either in a further cleaning stage or in the sand removal device 12 and the sand cycle via the pipe 14th fed again.
  • the result of the grain to grain friction Dust and the abraded binder are removed with the help of Suction through openings 17 in the hollow shaft in the area the plate 5,7 are attached, continuously through the hollow shaft 10 aspirated.
  • the suction is done by a weak Vacuum.
  • In the area of the guide element 8 there are inlet openings 18 provided through which a supply of air for extraction even during the regeneration process becomes.
  • the drive of the plate 5 is designed so that the regeneration units with different, continuously adjustable Speeds can be operated. Has been particularly cheap proven a speed of 300-1500 U / min.
  • the device is equipped with a cleaning stage and the sand can be circulated through the cleaning stage as often as required headed.

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 Verfahren und Vorrichtung zur Regenerierung von Giessereialtsand Expired - Lifetime EP0687514B1 (de)

Applications Claiming Priority (3)

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

Publications (2)

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

Family

ID=4220878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105892A Expired - Lifetime EP0687514B1 (de) 1994-06-15 1995-04-20 Verfahren und Vorrichtung zur Regenerierung von Giessereialtsand

Country Status (7)

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

Families Citing this family (16)

* 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
TW462901B (en) * 1999-02-08 2001-11-11 Shinto Kogyo Ltd Method and apparatus for reclaiming casting sand
US6248683B1 (en) 1999-04-07 2001-06-19 Silicycle Inc. Process for the regeneration of used silica gel
EP1222978A3 (en) * 2001-01-15 2007-10-17 Sintokogio, Ltd. A method for making sand covered with bentonite, the sand, and a method for recycling molding sand for a mold using the sand covered by bentonite
MXPA03009122A (es) * 2001-04-05 2004-11-22 Clayton Thermal Processes Ltd Tratamiento de recuperacion de material particulado aglomerado.
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
US6631808B2 (en) 2001-08-07 2003-10-14 Particle And Coating Technologies, Inc. Air classifier system for the separation of particles
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
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
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
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
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
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
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

Family Cites Families (16)

* 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
US3782643A (en) * 1971-01-21 1974-01-01 Carborundum Co Apparatus for conditioning a granular material
DE2408981C3 (de) * 1974-02-25 1979-11-08 Alb. Klein Kg, 5241 Niederfischbach Verfahren zur Reinigung von Schüttgütern durch Zentrifugalkräfte sowie Vorrichtung zur Durchführung des Verfahrens
CH581496A5 (pt) * 1974-08-16 1976-11-15 Fischer Ag Georg
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
JPS6135328Y2 (pt) * 1980-12-02 1986-10-14
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
CH687858A5 (de) * 1992-07-01 1997-03-14 Fischer Georg Giessereianlagen Einrichtung zur Regenerierung von Giesserei-Sand.
FR2696360B1 (fr) * 1992-10-07 1994-12-23 Fm Ind Installation de régénération par traitement mécanique de particules enrobées d'une gangue.

Also Published As

Publication number Publication date
HUT76771A (en) 1997-11-28
BR9502794A (pt) 1996-02-06
US5706879A (en) 1998-01-13
CH686411A5 (de) 1996-03-29
CZ82795A3 (en) 1996-01-17
HU215811B (hu) 1999-02-01
DE59507231D1 (de) 1999-12-23
EP0687514A1 (de) 1995-12-20
HU9501737D0 (en) 1995-08-28

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