EP0263977A2 - Dispositif pour le compactage du sable de moulage - Google Patents

Dispositif pour le compactage du sable de moulage Download PDF

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Publication number
EP0263977A2
EP0263977A2 EP87113236A EP87113236A EP0263977A2 EP 0263977 A2 EP0263977 A2 EP 0263977A2 EP 87113236 A EP87113236 A EP 87113236A EP 87113236 A EP87113236 A EP 87113236A EP 0263977 A2 EP0263977 A2 EP 0263977A2
Authority
EP
European Patent Office
Prior art keywords
molding
molding box
molding sand
openings
compression
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
EP87113236A
Other languages
German (de)
English (en)
Other versions
EP0263977B1 (fr
EP0263977A3 (en
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6311592&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0263977(A2) "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 EP0263977A2 publication Critical patent/EP0263977A2/fr
Publication of EP0263977A3 publication Critical patent/EP0263977A3/de
Application granted granted Critical
Publication of EP0263977B1 publication Critical patent/EP0263977B1/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
    • 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 device for compacting molding sand filled in a molding box, which is placed on a model plate provided with ventilation bores, with a surface pressing device which is displaceably arranged in a chamber which is open on one side and adapted to the molding box and which is height-displaceably arranged in the chamber, which is pressure-tight the molding box or on a filling frame placed on the molding box can be placed and is provided with a compressed gas connection, via which compressed gas can be applied to the molding sand via openings arranged in the surface pressing device.
  • DE-AS 29 30 874 describes a device in which a pre-compression by means of compressed air and a post-compression by means of a flat press plate takes place, the special feature being that the compressed air can act directly on the entire surface of the molding sand and during the post-compression acts through the mechanical press plate on the surface of this press plate, so that here additional driving forces for the pressing process can be saved.
  • the invention has for its object to provide an initially described device for the compression of the molding sand so that on the one hand an optimal pre-compression by compressed gas and an optimal post-compression is obtained by mechanical pressing of the sand.
  • the device thus consists of a mechanical pressing device which presses the molding sand located in the molding box over the entire surface of the molding box, but which does not consist of a flat pressing plate, but consists of a large number of individual punches, each of which has its own drive .
  • the press rams are advantageously connected to double-acting hydraulic cylinders, all of which have the same cross-section, so that the same pressure is exerted on the molding sand by all the press cylinders.
  • the molding sand Due to the relative displaceability of the individual punches relative to one another, the molding sand can be solidified uniformly over the surface of the casting mold without a different degree of compaction being obtained due to inhomogeneities in the molding sand is, as is the case with the known planar pressing devices. Furthermore, openings have been left between the individual adjacent punches through which the compressed air can pass for pre-consolidating the molding sand, so that since there are a large number of punches and thus also a large number of openings, the surface of the molding sand is evenly applied the compressed air or the compressed gas is obtained. This contributes to a uniform compression of the molding sand over the surface, local trough formation being avoided by the relatively large opening cross section for the compressed gas, which is arranged distributed over the surface of the molding box.
  • the device for compression is designated by 1 in FIGS. 1 and 2.
  • the device consists of a chamber 2, in which a plurality of piston-cylinder units 3 are arranged distributed over the surface, as can also be seen in FIG. 2, in which the piston-cylinder units are represented by crosses are indicated. All piston-cylinder units 3 are supplied or relieved of pressure oil via common connections 4, 5. All piston-cylinder units have the same cross section.
  • a stamp 6 is arranged at the ends of the pistons 17 of each piston-cylinder unit, the internal stamps having the same surface 7, but the edge stamps can be designed with smaller surfaces in order to achieve a higher specific pressure. Openings 8 are left between different stamps 6, which serve for the passage of compressed air, which is supplied via pipes 9, which are designed with a relatively large cross-section. As can be seen from FIGS. 1 and 2, all pipelines 9 are connected to a valve 10, via which the compressed air is switched.
  • the device 1 is advantageously arranged such that it can be displaced in height, so that it can be placed on the filling frame 11, which rests on a molding box 12. Molding box 12 and filling frame 11 are filled with molding sand 13.
  • the model 14 is arranged on a model plate 15 which is provided with a plurality of ventilation bores 16.
  • the molding sand is compacted in two phases. First, the device 1 is placed on the filling frame 11, which rests on the molding box 12. A pressure-tight connection is made here. Following this, the valve 10 is opened and compressed air is applied to the molding sand via the pipes 9 and the openings 8 formed between the punches 6. Due to the large number of openings that are spread over the area, the Compressed air evenly applied to the surface so that uniform pre-consolidation is obtained here. The compressed air escapes through the ventilation holes 16 in the mold plate 15 from the mold box 12.
  • the piston cylinder units 3 are pressurized with pressure oil via the pressure oil connection 4, so that the punches 6 are pressed against the molding sand, with the same pressure in each case , since all stamps are designed with the same surface, this pressure is evenly transmitted into the molding sand.
  • the molding sand is thus compacted evenly to the desired extent over the surface of the molding box. The compression is much better and more uniform than can be obtained with a continuous flat press plate.
  • the pre-compression by the compressed gas is much more uniform and effective, since the compressed gas hits the surface of the molding sand essentially perpendicularly through the openings between the punches. This is not the case in the prior art or only to a small extent. Furthermore, it has proven to be advantageous to make the openings 8 as large as possible so that a uniform, but relatively low flow velocity of the air or the compressed gas is obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
EP19870113236 1986-10-11 1987-09-10 Dispositif pour le compactage du sable de moulage Expired - Lifetime EP0263977B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863634767 DE3634767A1 (de) 1986-10-11 1986-10-11 Vorrichtung zur verdichtung von formsand
DE3634767 1986-10-11

Publications (3)

Publication Number Publication Date
EP0263977A2 true EP0263977A2 (fr) 1988-04-20
EP0263977A3 EP0263977A3 (en) 1989-08-23
EP0263977B1 EP0263977B1 (fr) 1991-12-27

Family

ID=6311592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870113236 Expired - Lifetime EP0263977B1 (fr) 1986-10-11 1987-09-10 Dispositif pour le compactage du sable de moulage

Country Status (3)

Country Link
EP (1) EP0263977B1 (fr)
DE (1) DE3634767A1 (fr)
DK (1) DK528287A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295472A3 (en) * 1987-06-13 1989-06-21 Bmd Badische Maschinenfabrik Durlach Gmbh Method of and installation for ramming mold material in foundry molding machines
ES2048635A2 (es) * 1991-10-30 1994-03-16 Arana Era A Cabezal para maquinas de moldeo de cajas de arena por impacto de aire.
EP0673698A1 (fr) * 1994-03-22 1995-09-27 Heinrich Wagner Sinto Maschinenfabrik GmbH Procédé pour la production de moules
EP0925858A1 (fr) * 1997-12-16 1999-06-30 Heinrich Wagner Sinto Maschinenfabrik GmbH Procédé et dispositif pour le compactage du sable de moulage
US6145576A (en) * 1996-12-17 2000-11-14 Loramendi, S.A. Machine for compacting sand moulds by air impact or expansion waves
US6253827B1 (en) * 1998-10-28 2001-07-03 Sintokogio, Ltd. Method of compressing molding sand using independently controlled gas guiding pipes
EP1149646A4 (fr) * 1999-11-04 2004-09-15 Sintokogio Ltd Dispositif et procede de moulage pour moule en sable

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114362A1 (de) * 1991-05-02 1992-11-05 Wagner Heinrich Sinto Masch Verfahren zum herstellen einer sandform

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE2815951A1 (de) * 1978-04-13 1979-10-18 Wagner Maschf Heinrich Giessereiformmaschine
DE2844464C2 (de) * 1978-10-12 1983-03-24 Bühler, Eugen, Dipl.-Ing., 8871 Burtenbach Verfahren und Vorrichtung zum Verdichten von Gießformen
JPS55120450A (en) * 1979-03-08 1980-09-16 Sintokogio Ltd Mold molding apparatus
JPS55136543A (en) * 1979-04-11 1980-10-24 Sintokogio Ltd Cover device of mold molding machine
DE3034653A1 (de) * 1980-09-13 1982-04-29 Buderus Ag, 6330 Wetzlar Vorrichtung zur herstellung von giessformen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295472A3 (en) * 1987-06-13 1989-06-21 Bmd Badische Maschinenfabrik Durlach Gmbh Method of and installation for ramming mold material in foundry molding machines
ES2048635A2 (es) * 1991-10-30 1994-03-16 Arana Era A Cabezal para maquinas de moldeo de cajas de arena por impacto de aire.
EP0673698A1 (fr) * 1994-03-22 1995-09-27 Heinrich Wagner Sinto Maschinenfabrik GmbH Procédé pour la production de moules
US6145576A (en) * 1996-12-17 2000-11-14 Loramendi, S.A. Machine for compacting sand moulds by air impact or expansion waves
EP0925858A1 (fr) * 1997-12-16 1999-06-30 Heinrich Wagner Sinto Maschinenfabrik GmbH Procédé et dispositif pour le compactage du sable de moulage
US6253827B1 (en) * 1998-10-28 2001-07-03 Sintokogio, Ltd. Method of compressing molding sand using independently controlled gas guiding pipes
EP1149646A4 (fr) * 1999-11-04 2004-09-15 Sintokogio Ltd Dispositif et procede de moulage pour moule en sable

Also Published As

Publication number Publication date
DK528287D0 (da) 1987-10-09
DE3634767A1 (de) 1988-04-21
EP0263977B1 (fr) 1991-12-27
DK528287A (da) 1988-04-12
EP0263977A3 (en) 1989-08-23

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