EP1541257A2 - Dispositif pour la régénération de sable de fonderie - Google Patents

Dispositif pour la régénération de sable de fonderie Download PDF

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Publication number
EP1541257A2
EP1541257A2 EP04028400A EP04028400A EP1541257A2 EP 1541257 A2 EP1541257 A2 EP 1541257A2 EP 04028400 A EP04028400 A EP 04028400A EP 04028400 A EP04028400 A EP 04028400A EP 1541257 A2 EP1541257 A2 EP 1541257A2
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EP
European Patent Office
Prior art keywords
sand
grinding
grinding disc
central housing
foundry sand
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.)
Withdrawn
Application number
EP04028400A
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German (de)
English (en)
Other versions
EP1541257A3 (fr
Inventor
Jörg Häring
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1541257A2 publication Critical patent/EP1541257A2/fr
Publication of EP1541257A3 publication Critical patent/EP1541257A3/fr
Withdrawn legal-status Critical Current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
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
    • B02C7/08—Crushing or disintegrating by disc mills with coaxial discs with vertical axis

Definitions

  • the invention relates to a device for regenerating Foundry sand by means of a grinder according to the generic term of the independent claim.
  • Foundry sands especially sands for cores, must be high Requirements for dimensional stability, to which To meet temperature resistance and so on.
  • DD-138'516 is a method for the regeneration of Rohtonen and raw concrete of foundries known. Throughout Procedures include these raw concrete in wet Condition crushed by means of a vibrating or jet mill.
  • CH-572'773 is a method for regenerating Foundry sand known. It will be a rotary drum with horizontal axis, which is partially filled with grinding balls is used to remove from the grains of sand the cold resin residues knock off.
  • US-4,050,635 shows a large rotating drum horizontal axis. It includes a first and another Comminution zone. Sand lumps fall during the rotation on the inside of the drum arranged upright Mandrels. At this crushing zone closes a grinding zone which is also partially filled with steel balls. These balls hit the grains of sand and drive them through a sieve while the drum is rotating.
  • DE-2'159'092 is a method for regenerating Foundry sand described at the beginning of the process used a grinder. Here is a hammer mill, a Brechoder Roll mill mentioned. It will not continue received.
  • the object of the invention is to provide a device with which the grains of sand of the hardened additives can be exempted, and what the disadvantages mentioned does not have.
  • Used foundry sand, foundry sand and especially Core sand, is used in the regeneration of the additives freed.
  • the grains of sand are in particular of the irreversible and non-soluble additives separately by dry, mechanical processing.
  • the castings are removed from the molds removed.
  • the molding sand remains as hot mold fragments back. These must be cooled first and known Process smashed and shrunk. Left over smaller sand lumps, which also by means of conveyor belts and the like are easily transportable.
  • the device of Figure 1 and Figure 2 is in principle in built up in the vertical direction.
  • the sand goes up and up leaves the device below.
  • Base of the device is a Grinder with a fixed grinding plate 21 and a rotating grinding disc 22 with a vertical axis of rotation 20. It comprises a silo 1 with an inlet cone 11, which leads to a metering cylinder 12.
  • a Central housing 4 in which the grinder is housed.
  • the central housing 4 goes down into a conical Container 41 via, which at the bottom of an outlet 42 for the reclaimed sand.
  • Above the Central housing 4 is a mounting plate 13 with Adjustment elements 14 available.
  • the metering cylinder 12 is fixed connected to the mounting plate 13.
  • an upper refining plate 21st It can also be a grinding disc. She is stationary and provided in the middle with a through hole, which the Inner diameter of the metering cylinder 12 corresponds. Of the Transition from the through hole to the grinding surface of the fixed grinding disc 21 can be chamfered or rounded be so with the staggered and partly lumps forming sand grains better run into the grinder. With the Justier instituten 14, the distance of the mounting plate 13 from Central housing can be adjusted. This will also be the Mahlspalt 25 influenced.
  • the drive unit 3 by means Mounting elements 33 attached.
  • the drive unit 3 comprises an electric motor 32 with a bearing 34 for the rotating shaft and is in a dust-tight Drive housing 31.
  • the rotor of the electric motor 32 is according to the variant of Figure 1 directly coupled with a lower, rotating grinding disc 22.
  • the lower rotating grinding disc 22 rotates about a vertical axis of rotation 20.
  • the lower rotating grinding disc 22 may preferably be the same Diameter as the upper, fixed grinding plate 21 have. It can be provided with a collar 23 on the circumference. Of the Collar 23 serves as a deflector for the falling sand.
  • the upper, fixed grinding plate 21 and the lower, rotating grinding disc 22 are at least partially at their opposite ends wear-resistant with Ceramic, carbide or other suitable materials coated. This coating 24 is harder than the Grains of sand, so little wear when grinding the sand binder Mixture occurs. Between the upper, fixed Grinding disc 21 and the lower, rotating grinding disc 22 there is a Mahlspalt 25. This is slightly larger than the Grains of sand. He is adjustable by means of the Adjustment elements 14. With these, the distance is the Mounting plate 13 from the central housing 4 changeable. This will be also the position of the upper, fixed grinding disc 21st opposite the central housing and thus opposite the lower one rotating grinding disc 22 adjustable.
  • Diameter and rotation speed are chosen that overheating of the device and the sand avoided becomes.
  • the hard binder shares of the Sand grains rubbed off.
  • the movement and the pressure that is exercised leaves the Binderanteile largely from Flake off the sand grain.
  • Clumps are rubbed.
  • the Rotational movement of the lower grinding disc 22 conveys the Sand grains and the binder parts to the outside, where they over the Collar 23 in the central housing 4 and in the collecting container 41st fall down.
  • the metering cylinder 12 has a height 12h and a diameter 12d. These dimensions are like that measured enough sand can flow to the grinder, without that the metering tube 12 is ever empty. This can additionally an upper and / or a lower level sensor 16, 17 to be available. They give appropriate signals to one Sand feed to the silo or control the rotation speed the grinder to the level.
  • the conglomerate of sand with binder flows through the Dosing cylinder down through the through hole in the upper, fixed grinding disc 21. It is used by the Rotational movement of the lower, rotating grinding disc 22 recorded and driven into the grinding gap 25. Here happens the Grinding of the conglomerate, wherein the binder parts of the Chips off sand grains.
  • the rotational movement drives that Material simultaneously radially outwards, where it into Central housing 4 falls down and conical Collecting container 41 is collected. From there come the Grains of sand through the spout 42 on a conveyor belt or like for reuse.
  • a dust collector be present, which micro parts and dust from the fine-grained material removed.
  • FIG. 1 In contrast to the variant of FIG. 1, in FIG the electric motor 32 outside the central housing 4th arranged. Between the electric motor 32 with a pinion 37 and the shaft of the lower, rotating grinding disc 22 with a Gear 38 is a chain drive or a Toothed belt drive 36.
  • the storage 34 must be correspondingly be designed and dimensioned.
  • the Mounting elements 33 which carry the drive for example be executed with three radial beams. This will be the free cross-section in the central housing 4 as little as possible impaired, and the sand can be well in the collection container 41 fall down.
  • the adjusting elements 14 for adjusting the Mahlspaltes 25 are here solved by the dosing on its outer side has a thread 15, so that the Dosing cylinder with respect to the mounting plate 13 by turning in the height is adjustable.
  • the thread 15 is engaged with a corresponding counterpart, which on an essay am Central housing 4 is present.
  • the Dosing cylinder 12 By twisting the Dosing cylinder 12 relative to the central housing 4 is the Dosing cylinder moved up or down, causing the upper, fixed grinding plate 21 equally mixed with becomes.
  • the grinding gap 25 is thereby also changed.
  • Such plants for the regeneration of foundry sands, in particular of core sands, are normally used in the Foundry itself set up. This is how the transport routes for Old and new sand the shortest. That's why everyone should Plant on the type of foundry, its size and throughput be built coordinated. Decisive is the consumption of Foundry sand and the amount that is constantly regenerating accrues. This customization is by simple sizing the dosing cylinder possible. He is in the inner diameter 12d and sized accordingly in its length 12h. As a supplement the silo 1 can be adjusted in its size. in the further can fill level sensors 16, 17 on the metering cylinder be attached to control the replenishment.
  • a foundry is usually energetic 24 Hours a day in operation.
  • the operation is usually running not continuous, since each mold formation, Casting process, unpacking the castings from the forms one take a certain amount of time and so a cyclic operation represent. Therefore, the used foundry sand also falls intermittently.
  • the regeneration device should but can be operated continuously.
  • the metering cylinder 12 is therefore for the flow rate of the foundry sand optimized and / or can with a control of the supply of Foundry sand to be added to the silo 1.
  • the described embodiment of the device cleans up continuous operation continuously.
  • the continuous Operation is achieved by the dimensioning of the dosing cylinder, achieved as described above.
  • the central housing 4 with the collecting container 41st together as a cyclone separator can be designed.
  • the dust from the reusable foundry sand can be pure be already removed pneumatically in the device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Crushing And Grinding (AREA)
  • Mold Materials And Core Materials (AREA)
EP04028400A 2003-12-13 2004-12-01 Dispositif pour la régénération de sable de fonderie Withdrawn EP1541257A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003158416 DE10358416B3 (de) 2003-12-13 2003-12-13 Vorrichtung zum Regenerieren von Giessereisand
DE10358416 2003-12-13

Publications (2)

Publication Number Publication Date
EP1541257A2 true EP1541257A2 (fr) 2005-06-15
EP1541257A3 EP1541257A3 (fr) 2005-10-05

Family

ID=34399711

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04028400A Withdrawn EP1541257A3 (fr) 2003-12-13 2004-12-01 Dispositif pour la régénération de sable de fonderie

Country Status (2)

Country Link
EP (1) EP1541257A3 (fr)
DE (1) DE10358416B3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD4094B1 (ro) * 2009-05-04 2011-02-28 Михаил ЧЕМЫРТАН Dispozitiv pentru măcinarea cerealelor
CN102794390A (zh) * 2012-07-23 2012-11-28 机械工业第四设计研究院 一种旧砂再生装置
CN105945219A (zh) * 2016-06-27 2016-09-21 苏州欣苏诚铸造机械有限公司 搓擦式再生机
CN114210413A (zh) * 2021-12-06 2022-03-22 河南省康华药业股份有限公司 一种木香顺气丸药物有效成分提取装置及其制备方法和应用

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110640133A (zh) * 2019-11-05 2020-01-03 烟台乐泰汽车配件有限公司 一种汽车刹车盘的铸造工艺及旧砂回收系统
CN113231143B (zh) * 2021-05-10 2022-08-09 重庆市平易粮油有限公司 一种食用油生产用高效研磨装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE577496C (de) * 1931-12-29 1933-06-01 Ley Maschf W Unterlaeufermahlgang
GB737021A (en) * 1952-03-15 1955-09-21 Herbert Alfred Merges Crushing machine with grinding discs moving relatively to each other
GB1229631A (fr) * 1967-03-29 1971-04-28
US4930708A (en) * 1989-06-23 1990-06-05 Chen Chi Shiang Grinding apparatus
US5330265A (en) * 1993-08-16 1994-07-19 Hartley Controls Corporation Apparatus and apparatus for mixing and cooling molding sand
US5836523A (en) * 1997-03-10 1998-11-17 Johnson; Norman W. Apparatus and method for reducing material
WO1999059932A1 (fr) * 1998-05-21 1999-11-25 Hiromi Yamamoto Broyeuse de ciment
DE10343602A1 (de) * 2003-09-20 2005-04-14 Schmid, Andreas, Dr.-Ing. M.Sc. Vorrichtung und Verfahren zur Behandlung eines Mediums wie Abwasser, Klärschlamm oder dergleichen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2115097B1 (fr) * 1970-11-30 1975-04-18 Sigma Applic Produits
CH572773A5 (en) * 1974-06-07 1976-02-27 Wyhlen Ag Eisenbau Recovery of used, cold-bonded resin sand - using ball-mill linked to air sifter to obtain max. recovery
US4050635A (en) * 1976-08-19 1977-09-27 Whirl-Air-Flow Corporation Method and apparatus for reclaiming sand
DD138516A1 (de) * 1978-08-29 1979-11-07 Werner Tilch Verfahren zur aufbereitung von rohtonen und rohbentoniten

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE577496C (de) * 1931-12-29 1933-06-01 Ley Maschf W Unterlaeufermahlgang
GB737021A (en) * 1952-03-15 1955-09-21 Herbert Alfred Merges Crushing machine with grinding discs moving relatively to each other
GB1229631A (fr) * 1967-03-29 1971-04-28
US4930708A (en) * 1989-06-23 1990-06-05 Chen Chi Shiang Grinding apparatus
US5330265A (en) * 1993-08-16 1994-07-19 Hartley Controls Corporation Apparatus and apparatus for mixing and cooling molding sand
US5836523A (en) * 1997-03-10 1998-11-17 Johnson; Norman W. Apparatus and method for reducing material
WO1999059932A1 (fr) * 1998-05-21 1999-11-25 Hiromi Yamamoto Broyeuse de ciment
DE10343602A1 (de) * 2003-09-20 2005-04-14 Schmid, Andreas, Dr.-Ing. M.Sc. Vorrichtung und Verfahren zur Behandlung eines Mediums wie Abwasser, Klärschlamm oder dergleichen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD4094B1 (ro) * 2009-05-04 2011-02-28 Михаил ЧЕМЫРТАН Dispozitiv pentru măcinarea cerealelor
CN102794390A (zh) * 2012-07-23 2012-11-28 机械工业第四设计研究院 一种旧砂再生装置
CN105945219A (zh) * 2016-06-27 2016-09-21 苏州欣苏诚铸造机械有限公司 搓擦式再生机
WO2018001250A1 (fr) * 2016-06-27 2018-01-04 济南圣泉集团股份有限公司 Machine de récupération de type à frottement
CN114210413A (zh) * 2021-12-06 2022-03-22 河南省康华药业股份有限公司 一种木香顺气丸药物有效成分提取装置及其制备方法和应用

Also Published As

Publication number Publication date
EP1541257A3 (fr) 2005-10-05
DE10358416B3 (de) 2005-04-28

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