EP0736349A2 - Procédé et dispositif pour refroidir le sable de moulage - Google Patents

Procédé et dispositif pour refroidir le sable de moulage Download PDF

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Publication number
EP0736349A2
EP0736349A2 EP96104557A EP96104557A EP0736349A2 EP 0736349 A2 EP0736349 A2 EP 0736349A2 EP 96104557 A EP96104557 A EP 96104557A EP 96104557 A EP96104557 A EP 96104557A EP 0736349 A2 EP0736349 A2 EP 0736349A2
Authority
EP
European Patent Office
Prior art keywords
sand
mixing
water
conveying device
cooling
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
EP96104557A
Other languages
German (de)
English (en)
Other versions
EP0736349A3 (fr
EP0736349B1 (fr
Inventor
Ernst O. Dipl.-Ing. Kruse
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.)
Maschinenfabrik Gustav Eirich GmbH and Co KG
Original Assignee
Maschinenfabrik Gustav Eirich GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7758751&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0736349(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Maschinenfabrik Gustav Eirich GmbH and Co KG filed Critical Maschinenfabrik Gustav Eirich GmbH and Co KG
Publication of EP0736349A2 publication Critical patent/EP0736349A2/fr
Publication of EP0736349A3 publication Critical patent/EP0736349A3/fr
Application granted granted Critical
Publication of EP0736349B1 publication Critical patent/EP0736349B1/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
    • B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying

Definitions

  • the models of the cast parts are molded into sand molds under high pressure and liquid iron is poured into the cavities. After the iron has solidified, the castings are removed from the mold and the molding sand is prepared and used again for the production of the mold. As a result of contact with the liquid metal, the molding sand has become very hot locally, so that cooling is essential before reuse.
  • the most common methods include loosening up and flowing air through the sand. This requires extremely large-area devices with a very large air throughput in order to cool the rather unevenly heated areas of sand to a usable temperature.
  • the heated cooling air is permeated with dust and must be cleaned in voluminous dedusting systems.
  • the disadvantages of this process are high space and energy requirements with uneven cooling.
  • OS 30 06 552 describes a cooling device in which 2 containers are alternately filled with moistened hot old sand and placed under vacuum. The moisture in the sand evaporates and extracts the heat of vaporization from the sand.
  • a disadvantage of this method is the fact that the intermittent operation requires 2 evaluation containers and the vacuum in the quite large containers has to be built up and dismantled continuously. The energy consumption and space requirements of such a system are therefore very large.
  • P 29 52 403 describes a molding sand mixer whose mixing space is evacuated during the mixing process, so that heat of evaporation is also dissipated here.
  • the ratio of evacuation volume is also in this method very unfavorable for the amount of sand, because here too the vacuum must be built up and broken down with every mixing cycle.
  • the normal mixing cycle must also be extended considerably, so that energy and investment costs are also unfavorable here.
  • the object of the present invention is to create a device which avoids the above disadvantages and is therefore inexpensive and saves space and energy.
  • a mixing and conveying device is proposed.
  • the hot sand is moistened as required and continuously conveyed through the device. Due to the mixing effect of the screw conveyors, the added water is mixed intensively with the sand.
  • the mixing and conveying device is constantly under vacuum. The water evaporates and extracts the heat of vaporization from the sand. The steam is sucked off and condensed. The resulting water is recooled and reused to wet the sand.
  • two-chamber locks are connected upstream and downstream.
  • 1 shows the method and device in an exemplary embodiment.
  • the hot sand 2 reaches the lock 3 from a conveyor belt 1.
  • An airtight, mechanically operated changeover flap 3.1 guides the sand into the left lock chamber 3.2, which is closed at the bottom by a flap 3.6, which is also motor-operated and hermetically closed.
  • the flap 3.7 closes automatically.
  • the pressure compensation valve 25.1 opens for a few seconds.
  • the flap 3.1 is automatically pivoted to the left, so that the right chamber 3.3 is now filled.
  • the lower flap 3.6 is opened so that the sand from the chamber 3.2 reaches the mixing and conveying device 4 and thus the evacuated space.
  • the lower flap 3.6 closes first, then the pressure compensation valve 25 and opens briefly the flap 3.1 swings back into the right position, so that the left chamber 3.2 is now filled again and the right 3.3 is emptied downwards at the same time.
  • the hot sand reaches the evacuated mixing and conveying device 4, whereby - as a special feature of the present invention - the vacuum is constantly maintained in it.
  • the mixing and cooling device 4 consists, for example, of a tubular housing 5, in the central axis of which rotates a shaft 7 driven by a motor 6, which is equipped with blades 8 which are predominantly inclined in the conveying direction.
  • Probes for detecting the temperature 10 and the residual moisture of the sand 11 are arranged in the inlet connection 9. The temperature and residual moisture are evaluated in a computer and the result thereof is used to control the control valve 12 for the water supply 13.
  • the water vapor resulting from the vacuum is sucked through the suction nozzle 14 into the condenser 15, which is constantly kept at a vacuum of 10-15 Torr by a vacuum pump 16.
  • the condensed water 17 is partially returned to the condenser by a circulating pump 18 through a cooler 19 and partially used to moisten the sand.
  • a level probe 20 controls the water level 17.
  • Control valves 12 and 21 control the amount of water required, partly in circulation, partly with fresh water supply from the network.
  • a second two-chamber lock 23 is connected in an airtight manner.
  • This lock 23 is identical in construction to the lock 3 on the inlet connection 9.
  • the cooled sand falls into the left chamber 23.2, while the right chamber 23.3 is emptied onto a conveyor belt 24 through the lower flap 23.7. If the sand reaches the probe 23.4, the lower flap 23.7 closes, the pressure compensation valve 26 opens for a few seconds and the flap 23.1 swings to the left, so that the right chamber 23.3 is now filled. Then the pressure compensation valve 26.1 first opens and then the lower flap 23.6 so that the sand falls onto the conveyor belt 24. This lock also works fully automatically in constant change.
  • the present invention is not limited to the embodiment described. It takes into account a. also an execution acc. Fig. 2, in which 2 mixing and conveying devices are provided.
  • the hot sand is moistened and homogenized in the first mixing and conveying device 27 and thus passes through the two-chamber lock 3 into the second mixing and conveying device 28, which is constantly under vacuum in the manner described above.
  • the heat of vaporization is fed to the condenser 15 in the manner described, the condensed water is recooled in the cooler and reused.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP96104557A 1995-04-04 1996-03-22 Procédé et dispositif pour refroidir et homogénéiser le sable de moulage Expired - Lifetime EP0736349B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19512593A DE19512593A1 (de) 1995-04-04 1995-04-04 Verfahren und Vorrichtung zum Kühlen von Gießereisand
DE19512593 1995-04-04

Publications (3)

Publication Number Publication Date
EP0736349A2 true EP0736349A2 (fr) 1996-10-09
EP0736349A3 EP0736349A3 (fr) 1997-05-07
EP0736349B1 EP0736349B1 (fr) 1999-07-28

Family

ID=7758751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104557A Expired - Lifetime EP0736349B1 (fr) 1995-04-04 1996-03-22 Procédé et dispositif pour refroidir et homogénéiser le sable de moulage

Country Status (10)

Country Link
US (1) US5915833A (fr)
EP (1) EP0736349B1 (fr)
JP (1) JP4055830B2 (fr)
CZ (1) CZ294324B6 (fr)
DE (2) DE19512593A1 (fr)
DK (1) DK0736349T3 (fr)
ES (1) ES2133858T3 (fr)
IN (1) IN187705B (fr)
PL (1) PL180654B1 (fr)
RU (1) RU2137569C1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0914882A1 (fr) * 1997-10-09 1999-05-12 Sintokogio, Ltd. Procédé de préparation du sable de moulage pour des moules au sable vert
WO2001098001A1 (fr) * 2000-06-23 2001-12-27 Maschinenfabrik Gustav Eirich Gmbh & Co.Kg Procede et dispositif de preparation de sable de coulee
CN104338895A (zh) * 2013-07-31 2015-02-11 泰州市美鑫铸造有限公司 V法铸造铸沙回收装置
CN104841879A (zh) * 2015-05-12 2015-08-19 共享装备有限公司 铸造树脂灰负压输送系统
CN106077448A (zh) * 2016-08-10 2016-11-09 禹州市昆仑模具有限公司 一种覆膜砂再生方法

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19945569A1 (de) * 1999-09-23 2001-03-29 Eirich Maschf Gustav Verfahren zur Aufbereitung von Gießereiformsand und Vorrichtung hierfür
DE19958591A1 (de) * 1999-12-06 2001-06-07 Fischer Georg Disa Eng Ag Verfahren zum Bearbeiten und Transportieren von Sand
US6367959B1 (en) * 2000-02-19 2002-04-09 General Kinematics Corporation Method and apparatus for blending water with sand
WO2002074467A1 (fr) 2001-03-20 2002-09-26 Nv Engineering Gmbh Procede et dispositif de traitement refroidissant de materiaux en vrac chauds
RU2249503C1 (ru) * 2003-06-27 2005-04-10 САВВАТЕЕВ Алексей Дмитриевич Способ приготовления бетонной смеси
US20060221764A1 (en) * 2005-03-17 2006-10-05 Everett Steve E Method and system for preparing input material for structural building blocks
DE102014117509A1 (de) * 2014-11-28 2016-06-02 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Vorrichtung zur Aufbereitung und Kühlung von Gießereiformsand
UY37068A (es) * 2016-01-06 2017-07-31 Oren Tech Llc Transportador con sistema integrado de recoleccion de polvo
KR101950029B1 (ko) * 2017-06-13 2019-04-29 한국생산기술연구원 폐주물사 재생장치 및 이를 이용하는 폐순환 사재생 주물제조 시스템
PL3862157T3 (pl) * 2020-02-04 2023-05-02 I.C.M. S.R.L. Sposób i instalacja do chłodzenia mieszaniny składników betonu
CN113399621A (zh) * 2021-06-23 2021-09-17 河南省德强实业有限公司 全自动砂处理系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2585739A (en) * 1950-03-29 1952-02-12 Joseph D Christian Cooling off of sand and gravel
DE1219182B (de) * 1963-08-23 1966-06-16 Ubbink Gieterij N V Verfahren und Vorrichtung zur Kuehlung von Formsand
US4611469A (en) * 1977-01-21 1986-09-16 General Kinematics Method and apparatus for cooling foundry sand
US4252001A (en) * 1977-01-21 1981-02-24 Musschoot A Method and apparatus for cooling foundry sand
CA1096132A (fr) * 1977-01-21 1981-02-24 Albert Musschoot Appareil et methode pour regenerer du sable de fonderie
US4361405A (en) * 1980-12-18 1982-11-30 Alfelder Maschinen-Und Modell-Fabrik Kunkel, Wagner & Co. K.G. Method and apparatus for preparing, more particularly for the cooling and mixing of moulding sand
JPS60151650U (ja) * 1985-02-02 1985-10-08 株式会社　喜多村合金製作所 鋳物砂の急速除湿乾燥装置
JPH0775754B2 (ja) * 1990-03-20 1995-08-16 キュトナー ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディト ゲゼルシャフト 鋳型用古砂の再生法
DE4224438A1 (de) * 1991-10-19 1993-04-22 Hans Martin Koopmann Vorrichtung zur regenerierung von giessereisand und vorzugsweise mittels dieser vorrichtung durchfuehrbares verfahren zur regenerierung von giessereisand
JP2982629B2 (ja) * 1994-09-30 1999-11-29 マツダ株式会社 鋳物砂の混練調整方法及びその装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0914882A1 (fr) * 1997-10-09 1999-05-12 Sintokogio, Ltd. Procédé de préparation du sable de moulage pour des moules au sable vert
US6017387A (en) * 1997-10-09 2000-01-25 Sintokogio, Ltd. Process for preparing molding sand for green sand mold
WO2001098001A1 (fr) * 2000-06-23 2001-12-27 Maschinenfabrik Gustav Eirich Gmbh & Co.Kg Procede et dispositif de preparation de sable de coulee
CZ304626B6 (cs) * 2000-06-23 2014-08-13 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Způsob a zařízení k úpravě formovacího písku
CN104338895A (zh) * 2013-07-31 2015-02-11 泰州市美鑫铸造有限公司 V法铸造铸沙回收装置
CN104841879A (zh) * 2015-05-12 2015-08-19 共享装备有限公司 铸造树脂灰负压输送系统
CN104841879B (zh) * 2015-05-12 2016-08-31 共享装备有限公司 铸造树脂灰负压输送系统
CN106077448A (zh) * 2016-08-10 2016-11-09 禹州市昆仑模具有限公司 一种覆膜砂再生方法

Also Published As

Publication number Publication date
DE19512593A1 (de) 1996-10-10
DE59602512D1 (de) 1999-09-02
EP0736349A3 (fr) 1997-05-07
JP4055830B2 (ja) 2008-03-05
DK0736349T3 (da) 1999-11-29
CZ294324B6 (cs) 2004-11-10
JPH08300098A (ja) 1996-11-19
RU2137569C1 (ru) 1999-09-20
ES2133858T3 (es) 1999-09-16
EP0736349B1 (fr) 1999-07-28
PL313611A1 (en) 1996-10-14
CZ97596A3 (en) 1996-10-16
PL180654B1 (pl) 2001-03-30
US5915833A (en) 1999-06-29
IN187705B (fr) 2002-06-08

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