EP0024490A1 - Procédé pour séparer un moule à carapace réfractaire en sable aggloméré d'un modèle de fonderie - Google Patents

Procédé pour séparer un moule à carapace réfractaire en sable aggloméré d'un modèle de fonderie Download PDF

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Publication number
EP0024490A1
EP0024490A1 EP80103436A EP80103436A EP0024490A1 EP 0024490 A1 EP0024490 A1 EP 0024490A1 EP 80103436 A EP80103436 A EP 80103436A EP 80103436 A EP80103436 A EP 80103436A EP 0024490 A1 EP0024490 A1 EP 0024490A1
Authority
EP
European Patent Office
Prior art keywords
mask
foundry model
molding
foundry
separating
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
EP80103436A
Other languages
German (de)
English (en)
Other versions
EP0024490B1 (fr
Inventor
Christian Schönenborn
E. Prof. Jaeger
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to AT80103436T priority Critical patent/ATE3005T1/de
Publication of EP0024490A1 publication Critical patent/EP0024490A1/fr
Application granted granted Critical
Publication of EP0024490B1 publication Critical patent/EP0024490B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C13/00—Moulding machines for making moulds or cores of particular shapes
    • B22C13/08—Moulding machines for making moulds or cores of particular shapes for shell moulds or shell cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C17/00—Moulding machines characterised by the mechanism for separating the pattern from the mould or for turning over the flask or the pattern plate

Definitions

  • the invention relates to a method for separating a refractory form mask, which is represented by mechanical and / or pneumatic compression and possibly by heat curing on the surface of a foundry model from a fine-grained mineral mass with particles encased by an organic or inorganic binder, from which Foundry model.
  • a dry, fine-grained mass is compressed with a thermosetting binder by means of compressed air on the surface of the foundry model to form a thin molding mask.
  • the hardened mold mask is separated from the foundry model with the aid of lifting pins, which punctually load the mold mask.
  • this punctual loading presupposes a high stability of the molding mask, on the other hand, in the case of large-area molding masks, lifting must take place at several points or the lifting dimension must be relatively large, since lifting off the relatively elastic molding mask must be ensured on the entire surface of the foundry model.
  • the mold mask is separated evenly from the entire surface of the foundry model, regardless of the shape of the foundry model. Since there is no punctual stress on the form mask during separation, the stability, elasticity and porosity of the form mask can be specifically selected for further processing without any particular restrictions, with the appropriate choice of binder and material.
  • FIG. 1 An exemplary embodiment of an apparatus for carrying out the method is shown in simplified form.
  • the figure shows a cross section through a foundry model with a molding box arranged thereon.
  • 1 denotes a standard mask which is cured in a corresponding shape on the surface of a foundry model 2.
  • the foundry model 2 has a space 3 on its rear side, which is connected on the one hand to a multiplicity of uniformly distributed bores 4 extending to the surface of the foundry model 2 and on the other hand to a compressed air connection 5.
  • a molding box 6 is arranged on the foundry model and surrounds the molding mask 1 in a bell-like manner. The inside of the molding box 6 is in turn connected to a vacuum connection 7.
  • a negative pressure preferably suddenly, is built up in the interior of the molding box 6 via the connection 7, while via the connection 5, the space 3 and the bores 4 between the foundry model 2 and air is supplied to the molding mask 1, ie at least atmospheric pressure prevails at this point.
  • an excess pressure is created.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Mold Materials And Core Materials (AREA)
EP80103436A 1979-07-20 1980-06-20 Procédé pour séparer un moule à carapace réfractaire en sable aggloméré d'un modèle de fonderie Expired EP0024490B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80103436T ATE3005T1 (de) 1979-07-20 1980-06-20 Verfahren zum trennen einer feuerfesten formmaske von einem giessereimodell.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2929397A DE2929397C2 (de) 1979-07-20 1979-07-20 Verfahren zum Trennen einer feuerfesten Formmaske von einem Gießereimodell
DE2929397 1979-07-20

Publications (2)

Publication Number Publication Date
EP0024490A1 true EP0024490A1 (fr) 1981-03-11
EP0024490B1 EP0024490B1 (fr) 1983-04-13

Family

ID=6076267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103436A Expired EP0024490B1 (fr) 1979-07-20 1980-06-20 Procédé pour séparer un moule à carapace réfractaire en sable aggloméré d'un modèle de fonderie

Country Status (3)

Country Link
EP (1) EP0024490B1 (fr)
AT (1) ATE3005T1 (fr)
DE (1) DE2929397C2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178555B (de) * 1955-02-22 1964-09-24 Elly Croning Geb Boernsen Verfahren zur Herstellung von Formmasken fuer Giessereizwecke
US3645320A (en) * 1970-07-20 1972-02-29 Universal Refractories Corp Apparatus for vacuum forming hot top bottom rings

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765506A (en) * 1952-02-21 1956-10-09 Mechanical Handling Sys Inc Drum type machine for forming shell molds
DE1558153A1 (de) * 1963-06-06 1970-03-19 Vni I Pt I Ugolnowo Mash Selbsttaetige Vorrichtung zum Abbeben und Zusammenstellen gepresster,fertiger oberer und unterer Formmaskenhaelften
US3424229A (en) * 1966-02-22 1969-01-28 Dansk Ind Syndikat Core insertion unit for casting moulds
GB1151237A (en) * 1966-07-20 1969-05-07 Barnett Levy Method for Removing Sand Cores and Pattern Shells from Core Boxes and Patterns
US3989089A (en) * 1973-09-21 1976-11-02 Hitachi Metals, Ltd. Hollow core molding device for use in shell mold
DE2608740C2 (de) * 1976-03-03 1978-05-11 Eugen Dipl.-Ing. 8871 Burtenbach Buehler Verfahren zum Verdichten von Formsand
JPS5419422A (en) * 1977-07-13 1979-02-14 Mitsubishi Heavy Ind Ltd Casting method using reduceddpressure mold having blind feeder
JPS5456931A (en) * 1977-10-14 1979-05-08 Nippon Musical Instruments Mfg Vacuum molding and casting method for casting element
DE2923044C2 (de) * 1979-06-07 1987-05-27 Eugen Dipl.-Ing. 8877 Burtenbach Bühler Verfahren und Vorrichtung zur Herstellung von geteilten Komposit-Sandblock-Gießformen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178555B (de) * 1955-02-22 1964-09-24 Elly Croning Geb Boernsen Verfahren zur Herstellung von Formmasken fuer Giessereizwecke
US3645320A (en) * 1970-07-20 1972-02-29 Universal Refractories Corp Apparatus for vacuum forming hot top bottom rings

Also Published As

Publication number Publication date
EP0024490B1 (fr) 1983-04-13
ATE3005T1 (de) 1983-04-15
DE2929397C2 (de) 1985-08-08
DE2929397A1 (de) 1981-02-05

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