EP0992323A2 - Procédé pour dessabler des pièces moulées - Google Patents

Procédé pour dessabler des pièces moulées Download PDF

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Publication number
EP0992323A2
EP0992323A2 EP99118749A EP99118749A EP0992323A2 EP 0992323 A2 EP0992323 A2 EP 0992323A2 EP 99118749 A EP99118749 A EP 99118749A EP 99118749 A EP99118749 A EP 99118749A EP 0992323 A2 EP0992323 A2 EP 0992323A2
Authority
EP
European Patent Office
Prior art keywords
sand
castings
cutting beam
sand mold
cutting
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Withdrawn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
EP99118749A
Other languages
German (de)
English (en)
Other versions
EP0992323A3 (fr
Inventor
Kurt Fischer
Hans Leutwiler
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 Disa AG
Original Assignee
Georg Fischer Disa 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 Disa AG filed Critical Georg Fischer Disa AG
Publication of EP0992323A2 publication Critical patent/EP0992323A2/fr
Publication of EP0992323A3 publication Critical patent/EP0992323A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks

Definitions

  • the invention relates to a method for sanding in Cast sand castings using at least one fluid pressure pulse acting on the sand mold.
  • the invention has for its object a fluid pressure pulse to propose a working method that low energy consumption and low noise emissions allows largely complete desanding of the casting.
  • the fluid is bundled into at least one cutting jet and this is brought into effect on the sand mold.
  • the cutting beam can steep under a Align with the surface of the sand mold.
  • Several successive fluid pressure pulses can also be used are generated that are several in succession effective cutting beams. Otherwise the cutting beam geometry, the angle of incidence of the Cutting beam, as well as the pulse duration and pulse strength the respective conditions (size of the sand form, Molding sand height above the casting, number of castings in the Adjust shape, hardness, etc.).
  • the fluid can become one punctiform cutting beam bundled and can cutting beam as well as the casting are moved relative to each other.
  • the fluid bundle line-to-strip cutting beam wherein the cutting beam is preferably one of the extension length corresponding to the shape of the sand in one direction having.
  • the cutting beam formed in the manner according to the invention penetrates through the molding sand to the surface of the casting before and is partly reflected, partly on deflected the casting surface so that the molding sand in a combined cutting and peeling movement from the casting is separated.
  • Form bales are usually sufficient for a single cutting jet off, while with large-area or large-volume castings or in the case of shaped bales from multiple shapes at the same time several cutting jets on the sand surface Effect. This can be done stationary or else the cutting jet and bale of shape become relative moved to each other. The direction of movement can the specified shape bale or casting contour matched become.
  • the fluid can be a gas or a liquid. It can also contain solid particles.
  • Compressed air is particularly suitable for use in everyone Foundry operation is available. Preferably but uses a compressed air particle mixture, which makes the Cutting effect is enhanced.
  • As a particulate component comes mainly sand, especially when unpacking accruing dry molding sand in question, since this together with the molding sand obtained during sanding can be refurbished for the molding shop.
  • the casting is only sanded on the surface, whereas the mold cores in the casting remain. You can then separate them are, so that the core material largely not in the Shaped sand arrives and contaminates it, but separately can be worked up.
  • the cutting beam is preferably also aligned with the spaces between the castings and the molding sand located there was shot through.
  • the inventive method also offers the advantageous Possibility of adhering the castings Molding sand in the position it was in when pouring Suspend cutting jet.
  • the inventive method can be both Use box casting as well as boxless casting.
  • At box-bound forms are preferably those at the top The box was peeled off before sanding and the overhang Mold bales exposed to the cutting beam.
  • the device shown schematically in FIG. 1 has a compressed air tank 1 on a compressor is filled with compressed air.
  • the compressed air tank 1 is closed by a valve 2 opening into the container, that works with extremely short opening times.
  • On the valve 2 is connected to an air guiding device 3, which has an air outlet on its underside 4.
  • the Device for sanding box casting described above.
  • the upper box is already brought up deducted so that the bale 6 in the lower box 7 the transport path 5 is fed to the device.
  • the Compressed air tank or the air guiding device 4 After abrupt opening of the valve 2 occurs the compressed air the exit side 4 from a jet, meets the Mold sand surface of the mold bale 6 and cuts through the sand bale except for the embedded castings.
  • the Compressed air is partly on the surface of the castings reflected, partly redirected along the surface and cuts or peels the molding sand to the side path.
  • the compressed air jet by relative displacement of the lower box 5 opposite the air guiding device 3 on different areas of the Soak in the molding sand bale until finally all molding sand flung to the side. Then the lower box arrives 7, with the castings sanded above it 9 in a position in which out of the lower box can be removed.
  • the air guiding device 3 is in accordance with Fig. 1 shown in more detail. From the valve 2 shown in FIG. 1 only the outlet cross section can be seen in FIG. 2, to which the air guiding device 3 connects.
  • the air control device 3 narrows in the drawing plane of the Fig. 2 lunette-like towards the outside (Fig. 3) while she tapers in a funnel shape in the plane perpendicular to it (Fig. 4).
  • the air guiding device 3 is on its underside completed by a flange 11, the one conical inlet piece 12 and then one Has flat nozzle 13 (Fig. 4).
  • the Air guiding device 3 has a partition 14 in the middle, whose upper edge 15 below the outlet cross section of the valve 2 cut back in an arc shape is.
  • the sand mold contains several individual ones Castings 17 which are spaced apart in the Partition plane of the sand mold are arranged.
  • the air control device 3 has several nozzles 18 in adaptation to the Number of castings, so that one cutting beam each between the castings and between the outer castings and the mold box wall is directed (Fig. 6a).
  • the Castings 17 are exposed (Fig. 6b).
  • the castings 17 keep the in the form bale given order status and can in this order status to another post-processing station transported or also with handling devices in defined Positions are implemented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP99118749A 1998-10-06 1999-09-23 Procédé pour dessabler des pièces moulées Withdrawn EP0992323A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19845899 1998-10-06
DE19845899A DE19845899A1 (de) 1998-10-06 1998-10-06 Verfahren zum Entsanden von Gußstücken

Publications (2)

Publication Number Publication Date
EP0992323A2 true EP0992323A2 (fr) 2000-04-12
EP0992323A3 EP0992323A3 (fr) 2002-11-27

Family

ID=7883512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99118749A Withdrawn EP0992323A3 (fr) 1998-10-06 1999-09-23 Procédé pour dessabler des pièces moulées

Country Status (6)

Country Link
US (1) US6283831B1 (fr)
EP (1) EP0992323A3 (fr)
JP (1) JP2000107855A (fr)
KR (1) KR20000028748A (fr)
CN (1) CN1249971A (fr)
DE (1) DE19845899A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2301692A1 (fr) 2009-09-14 2011-03-30 Georg Fischer Automobilguss GmbH Dispositif et procédé de déballage et de dessablage de pièces de formage coulées
CN112872297A (zh) * 2020-12-25 2021-06-01 兰州高压阀门有限公司 大型型面段铸件的阶梯式补缩铸造工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100423477C (zh) * 2003-09-29 2008-10-01 武汉光迅科技股份有限公司 可调整光功率分配器
DE102013224976B4 (de) * 2013-12-05 2019-07-11 Wobben Properties Gmbh Verfahren zum Aufbereiten von Formsand, sowie Gießsystem
KR101822714B1 (ko) 2015-10-05 2018-03-08 이윤정 해수욕장 간이샤워실 모래유입 방지장치

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738415A (en) * 1971-12-23 1973-06-12 J Planten Method of molding articles and reclaiming the foundry sand used
US4303453A (en) * 1979-06-06 1981-12-01 Foundry Design Corp. Method and apparatus for removing sand from castings
DE3204162A1 (de) * 1981-04-22 1982-11-11 VEB Wärmegerätewerk Elsterberg, DDR 6603 Elsterberg Durchlaufputzstrahlmaschine mit strahlmitteldurchlaessigem foerderer
JPS59224266A (ja) * 1983-06-03 1984-12-17 Sintokogio Ltd 鋳物の後処理装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074858A (en) * 1976-11-01 1978-02-21 Institute Of Gas Technology High pressure pulsed water jet apparatus and process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738415A (en) * 1971-12-23 1973-06-12 J Planten Method of molding articles and reclaiming the foundry sand used
US4303453A (en) * 1979-06-06 1981-12-01 Foundry Design Corp. Method and apparatus for removing sand from castings
DE3204162A1 (de) * 1981-04-22 1982-11-11 VEB Wärmegerätewerk Elsterberg, DDR 6603 Elsterberg Durchlaufputzstrahlmaschine mit strahlmitteldurchlaessigem foerderer
JPS59224266A (ja) * 1983-06-03 1984-12-17 Sintokogio Ltd 鋳物の後処理装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
AMBOS E UND BEIER H-M: "Stand und Entwicklungstendenzen der Nachbehandlung von Gußst}cken" GIEßEREITECHNIK, 34. JAHRGANG, Nr. 2, 1988, XP002211671 *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 100 (M-376), 2. Mai 1985 (1985-05-02) & JP 59 224266 A (SHINTO KOGYO KK), 17. Dezember 1984 (1984-12-17) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2301692A1 (fr) 2009-09-14 2011-03-30 Georg Fischer Automobilguss GmbH Dispositif et procédé de déballage et de dessablage de pièces de formage coulées
CN112872297A (zh) * 2020-12-25 2021-06-01 兰州高压阀门有限公司 大型型面段铸件的阶梯式补缩铸造工艺

Also Published As

Publication number Publication date
EP0992323A3 (fr) 2002-11-27
DE19845899A1 (de) 2000-04-13
JP2000107855A (ja) 2000-04-18
US6283831B1 (en) 2001-09-04
KR20000028748A (ko) 2000-05-25
CN1249971A (zh) 2000-04-12

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