EP0512201B1 - Verfahren zum Herstellen einer Sandform - Google Patents

Verfahren zum Herstellen einer Sandform Download PDF

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Publication number
EP0512201B1
EP0512201B1 EP92102610A EP92102610A EP0512201B1 EP 0512201 B1 EP0512201 B1 EP 0512201B1 EP 92102610 A EP92102610 A EP 92102610A EP 92102610 A EP92102610 A EP 92102610A EP 0512201 B1 EP0512201 B1 EP 0512201B1
Authority
EP
European Patent Office
Prior art keywords
sand
air
mould
compression
mechanical
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.)
Revoked
Application number
EP92102610A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0512201A3 (en
EP0512201A2 (de
Inventor
Herbert Dipl.-Ing. Grolla
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.)
Heinrich Wagner Sinto Maschinenfabrik GmbH
Original Assignee
Heinrich Wagner Sinto Maschinenfabrik GmbH
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=6430840&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0512201(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Heinrich Wagner Sinto Maschinenfabrik GmbH filed Critical Heinrich Wagner Sinto Maschinenfabrik GmbH
Publication of EP0512201A2 publication Critical patent/EP0512201A2/de
Publication of EP0512201A3 publication Critical patent/EP0512201A3/de
Application granted granted Critical
Publication of EP0512201B1 publication Critical patent/EP0512201B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing

Definitions

  • the invention relates to a method for producing a sand mold in a molding machine according to the preamble of patent claim 1.
  • the molding sand is compressed by pressure surge of a gaseous medium onto a molding sand loosely poured over a model device.
  • the pore volume on the top exposed to the pressure surge is reduced, for example, by spraying on a medium or by mechanically pressing the molding sand with a plate, so that the active area of the surface of the molding sand is enlarged and the gas pressure impact acting is thus offered an enlarged area of attack .
  • the method according to the invention was examined in comparison to the method according to the prior art on a molding machine from the applicant.
  • FIG. 1 shows a part of the sand molding machine, namely with the model plate 10 in which there are throughflow openings 12, the actual molding box 14 and the filling box 16 located above it.
  • a sand bunker 18 from which the molding box 14 and the filling box 16 are filled with molding sand. Then this bunker 18 is moved away and the arrangement of model plate 10, molding box 14 and filling box 16 moves the compression unit, which consists of a multi-die press head 20 and an air supply device 22 for supplying the compressed air with which the molding sand is compressed.
  • the press rams 20 are in their retracted position in FIG. 1b and in the lower press position in FIG. 1c.
  • experiment A carried out measurements in connection with a method according to which compressed air was applied to the molding sand in the sense of airflow compression and then mechanical re-compression by hydraulic pressing.
  • the series of tests yielded the following measurement results when 4 different special pressures were applied to the sand by the press rams: Table 1 spec. Press pressure on the molding sand kp / cm2 Mold hardness according to + GF + Degree of shape uniformity% Power requirement kW FH s 6 79 7.9 90 8.8 8th 84 4.3 95 10.2 10th 86 4.8 94 11.6 12th 90 2.8 97 12.9

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
EP92102610A 1991-05-02 1992-02-17 Verfahren zum Herstellen einer Sandform Revoked EP0512201B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4114362 1991-05-02
DE19914114362 DE4114362A1 (de) 1991-05-02 1991-05-02 Verfahren zum herstellen einer sandform

Publications (3)

Publication Number Publication Date
EP0512201A2 EP0512201A2 (de) 1992-11-11
EP0512201A3 EP0512201A3 (en) 1993-05-26
EP0512201B1 true EP0512201B1 (de) 1996-07-31

Family

ID=6430840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92102610A Revoked EP0512201B1 (de) 1991-05-02 1992-02-17 Verfahren zum Herstellen einer Sandform

Country Status (3)

Country Link
EP (1) EP0512201B1 (enrdf_load_stackoverflow)
DE (1) DE4114362A1 (enrdf_load_stackoverflow)
ES (1) ES2090378T3 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3083042B2 (ja) * 1994-05-12 2000-09-04 新東工業株式会社 鋳型造型方法
DE19540466A1 (de) * 1995-03-17 1996-09-19 Kuenkel Wagner Serv & Vertrieb Sandformqualität durch Ölstrommessung zum Preßhaupt
DE19652308B4 (de) * 1995-12-15 2007-03-01 Künkel-Wagner Prozesstechnologie GmbH Dynamische Iterative Stempel-Regelung des Preßvorganges beim Vielstempelpressen
DE69707094T2 (de) * 1996-12-17 2002-07-04 Loramendi, S.A. Luftdruckimpuls-Formmaschinen
ES2148020B1 (es) * 1996-12-17 2001-04-16 Loramendi Sa Maquina mejorada para compactacion de moldes de arena por impacto de aire u onda expansiva.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1290667B (de) * 1960-09-07 1969-03-13 Olsson Erik Allan Stahlstranggiessverfahren
US3293703A (en) * 1962-11-13 1966-12-27 Arthur R Taccone Vacuum molding apparatus
US3381740A (en) * 1965-07-07 1968-05-07 Osborn Mfg Co Foundry molding machine
DE2554414C2 (de) * 1975-12-03 1982-07-01 Alfelder Maschinen- und Modell-Fabrik Künkel, Wagner & Co KG, 3220 Alfeld Verfahren und Vorrichtung zum Herstellen von Sandgießformen
DE2608740C2 (de) * 1976-03-03 1978-05-11 Eugen Dipl.-Ing. 8871 Burtenbach Buehler Verfahren zum Verdichten von Formsand
JPS55120450A (en) * 1979-03-08 1980-09-16 Sintokogio Ltd Mold molding apparatus
CH653579A5 (de) * 1981-07-20 1986-01-15 Fischer Ag Georg Verfahren zum verdichten von koernigen formstoffen, insbesondere giessereiformstoffen, und vorrichtung zur durchfuehrung des verfahrens.
DE3634767A1 (de) * 1986-10-11 1988-04-21 Wagner Heinrich Sinto Masch Vorrichtung zur verdichtung von formsand
DE3740611C2 (de) * 1987-12-01 1998-07-23 Wagner Heinrich Sinto Masch Verfahren zum Verdichten von Formsand
IT1225165B (it) * 1988-11-21 1990-11-02 Stern Giesserei Anlagen Gmbh Apparecchiatura per la compressione della terra di formatura nelle staffe di fonderia mediante impulsi di aria compressa.
DE3939001C1 (en) * 1989-11-25 1991-01-31 Georg Fischer Ag, Schaffhausen, Ch Mfr. of casting mould parts, with uniform hardness - uses machine with pattern plate, moulding frame and filling frame

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BOENISCH D., LORENZ V.: "URSACHEN UND AUSWIRKUNGEN DERZEITIGER ENTWICKLUNGEN IM FORMMASCHINENBAU.", GIESSEREI, vol. 76., no. 20., 2 October 1989 (1989-10-02), pages 695 - 700., XP000053266, ISSN: 0016-9765 *

Also Published As

Publication number Publication date
ES2090378T3 (es) 1996-10-16
EP0512201A3 (en) 1993-05-26
EP0512201A2 (de) 1992-11-11
DE4114362A1 (de) 1992-11-05
DE4114362C2 (enrdf_load_stackoverflow) 1993-04-22

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