EP0017902A1 - Procédé de fabrication d'un moule réfractaire de fonderie - Google Patents

Procédé de fabrication d'un moule réfractaire de fonderie Download PDF

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Publication number
EP0017902A1
EP0017902A1 EP19800101883 EP80101883A EP0017902A1 EP 0017902 A1 EP0017902 A1 EP 0017902A1 EP 19800101883 EP19800101883 EP 19800101883 EP 80101883 A EP80101883 A EP 80101883A EP 0017902 A1 EP0017902 A1 EP 0017902A1
Authority
EP
European Patent Office
Prior art keywords
shell
model
sand
quartz sand
quartz
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
EP19800101883
Other languages
German (de)
English (en)
Other versions
EP0017902B1 (fr
Inventor
Christian Schönenborn
Ulrich Dr. Dipl.-Chem. Mennenga
H. Prof. Dipl.-Ing. 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
Huettenes Albertus Chemische Werke GmbH
Original Assignee
Kloeckner Humboldt Deutz AG
Huettenes Albertus Chemische Werke 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
Application filed by Kloeckner Humboldt Deutz AG, Huettenes Albertus Chemische Werke GmbH filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0017902A1 publication Critical patent/EP0017902A1/fr
Application granted granted Critical
Publication of EP0017902B1 publication Critical patent/EP0017902B1/fr
Expired 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
    • B22C15/23—Compacting by gas pressure or vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding

Definitions

  • the invention relates to a method for producing a refractory foundry mold, wherein an air pressure difference between the model and the sand or, if applicable, the core box is used for molding the sand onto the model and / or for sand compaction.
  • the object on which the invention is based is to create a method in which the difficulties described above are avoided and thus the possibility of optimum dimensional accuracy and shape accuracy of foundry molds with improved compression of the molding material in the area of the model is created.
  • the action of the pressure difference on the model surface compresses a free-flowing quartz sand, quartz material or a similar refractory material, the grains of which are encased in an organic or inorganic material, so that the highest possible uniformity of the mold hardness and, as far as possible, a strength compensation moment of the subsequent cast the molten metal is guaranteed.
  • the excess quartz sand is removed from the back of the compacting shell and the shell is backfilled with conventional molding material to create a foundry mold with great strength.
  • the excess quartz sand can be removed in any way.
  • this is done by tilting the mold or core box at 180 0 angle.
  • the consolidation of the rear Filling can be done in any way, as the shell is supported on the model.
  • the compression is also carried out in a favorable manner by means of an air pressure difference, since all gases and vapors flowing out of the sand can thereby be extracted.
  • Another significant advance of the invention is that throughout The process up to the separation of the foundry mold from the model is sucked out of the molded item air, at the same time the toxic or non-toxic gases formed during the hardening process are sucked off and can thereby be kept away from the work place. A harassment and danger to the working personnel is thus prevented.
  • 1 denotes a foundry model, which is preferably provided in the transition area from the model to the flat plate with suction openings 2, which in the simplified representation are only hinted at.
  • the model 1 is arranged on a heated plate 3, on the back of which there is a space 4 which is connected to the suction openings 2.
  • a molding box 5 is placed on the device, which is filled with a free-flowing quartz sand, quartz material or similar refractory, mineral material 6.
  • the plate 3 is heated before or during the filling of the molding box 5 surrounding the model 1.
  • a pressure difference between the surface of the model 1 and the free-flowing quartz sand 6 is generated by creating a negative pressure in the space 4, while atmospheric pressure prevails on the surface of the quartz sand.
  • the negative pressure in the space 4 can also be increased by an excess pressure on the surface of the quartz sand 6.
  • a hard and plastic shell 7 forms on the surface of the model 1, from which the excess quartz sand 6 is removed by tilting the entire device by approximately 180 ° while maintaining a pressure difference.
  • This hard shell 7 is, as further shown in FIG. 4, backfilled with a conventional molding material 8, for example wet casting molding sand, this backfilling 8 in turn being compressed by the action of a differential pressure between the surface of the model 1 and the backfilling becomes.
  • This pressure differential compression of the backfill can also be supplemented by mechanical compression, not shown.
  • an overpressure is created in the space 4, which leads to the separation of the shell 7 together with the backfill 8 from the model 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Mold Materials And Core Materials (AREA)
EP19800101883 1979-04-21 1980-04-09 Procédé de fabrication d'un moule réfractaire de fonderie Expired EP0017902B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2916211 1979-04-21
DE19792916211 DE2916211C2 (de) 1979-04-21 1979-04-21 Verfahren zur Herstellung einer Gießereiform

Publications (2)

Publication Number Publication Date
EP0017902A1 true EP0017902A1 (fr) 1980-10-29
EP0017902B1 EP0017902B1 (fr) 1983-05-18

Family

ID=6068934

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800101883 Expired EP0017902B1 (fr) 1979-04-21 1980-04-09 Procédé de fabrication d'un moule réfractaire de fonderie

Country Status (3)

Country Link
EP (1) EP0017902B1 (fr)
JP (1) JPS55141354A (fr)
DE (1) DE2916211C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116889A (en) * 1982-03-23 1983-10-05 Acme Conveyors & Constr A process of moulding a metal casting mould
FR2724336A1 (fr) * 1994-09-14 1996-03-15 Chardon Michel Georges Procede de moulage en sable siliceux alliant l'utilisation de sable a prise chimique et de sable sans liant sous depression
CN104325075A (zh) * 2014-10-08 2015-02-04 柳州金茂机械有限公司 一种v法铸造工艺
CN113400649A (zh) * 2021-06-30 2021-09-17 山东威高骨科材料股份有限公司 一种解决3d打印peek材料零件热变形的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2923044C2 (de) * 1979-06-07 1987-05-27 Eugen Dipl.-Ing. 8877 Burtenbach Bühler Verfahren und Vorrichtung zur Herstellung von geteilten Komposit-Sandblock-Gießformen
DE3318112A1 (de) * 1983-05-18 1984-11-22 Achinger, Michael, 8900 Augsburg Verfahren und vorrichtung zum herstellen von giessformen
CN105562623B (zh) * 2015-12-31 2017-10-24 华中科技大学 一种水玻璃砂型快速成形方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872915A (en) * 1971-10-08 1975-03-25 Akita Kk Vacuum sealed molding apparatus
DE2401349B2 (de) * 1973-01-11 1976-02-19 Verfahren zum herstellen einer geteilten giessform aus feuerfestem, bindemittelfreiem material als hinterfuellmasse
DE2619529A1 (de) * 1975-05-01 1976-11-18 Baker Perkins Holdings Ltd Verfahren und vorrichtung zum fuellen von giessereiformen oder kernkaesten mit einer formmischung auf sandbasis
US4028455A (en) * 1974-11-22 1977-06-07 Mitsubishi Jukogyo Kabushiki Kaisha Method for producing a reduced-pressure shaped mould
US4036276A (en) * 1974-09-30 1977-07-19 Mitsubishi Jukogyo Kabushiki Kaisha Method of shaping a mould under a reduced pressure
DE2608740B1 (de) * 1976-03-03 1977-09-08 Eugen Dipl-Ing Buehler Verfahren zum verdichten von formsand
AT340075B (de) * 1975-04-21 1977-11-25 Mitsubishi Heavy Ind Ltd Verfahren zum herstellen einer gussform

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945717C (de) * 1943-11-14 1956-07-12 Siemens Ag Verfahren zur Herstellung von Giessformen fuer Metallguss, Eisenguss od. dgl.
DE1097621B (de) * 1956-03-23 1961-01-19 Fritz Hansberg Verfahren und Formmaschine zur pneumatischen Herstellung von Giessereikernen und Giessereiformen sowie Kasten hierfuer
DE1129660B (de) * 1956-04-20 1962-05-17 Gen Motors Corp Verfahren und Vorrichtung zum Hinterfuellen von Formmasken beim Giessen
DE1167488B (de) * 1959-06-17 1964-04-09 Shell Moulding Foundry Ltd Verfahren zur Herstellung von Giessformen
US3293703A (en) * 1962-11-13 1966-12-27 Arthur R Taccone Vacuum molding apparatus
GB1151237A (en) * 1966-07-20 1969-05-07 Barnett Levy Method for Removing Sand Cores and Pattern Shells from Core Boxes and Patterns
JPS5519958B2 (fr) * 1972-08-15 1980-05-29
JPS5532459B2 (fr) * 1973-12-21 1980-08-25
DE2609274A1 (de) * 1976-03-05 1977-09-08 Buehler Eugen Verfahren zur pneumatischen sandverdichtung bei der herstellung von sandformen oder -kernen
DE2833999C2 (de) * 1978-08-03 1981-11-19 Eugen Dipl.-Ing. 8871 Burtenbach Bühler Verfahren und Vorrichtung zur Herstellung von Gießformen und -kernen
DE2844464C2 (de) * 1978-10-12 1983-03-24 Bühler, Eugen, Dipl.-Ing., 8871 Burtenbach Verfahren und Vorrichtung zum Verdichten von Gießformen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872915A (en) * 1971-10-08 1975-03-25 Akita Kk Vacuum sealed molding apparatus
DE2401349B2 (de) * 1973-01-11 1976-02-19 Verfahren zum herstellen einer geteilten giessform aus feuerfestem, bindemittelfreiem material als hinterfuellmasse
US4036276A (en) * 1974-09-30 1977-07-19 Mitsubishi Jukogyo Kabushiki Kaisha Method of shaping a mould under a reduced pressure
US4028455A (en) * 1974-11-22 1977-06-07 Mitsubishi Jukogyo Kabushiki Kaisha Method for producing a reduced-pressure shaped mould
AT340075B (de) * 1975-04-21 1977-11-25 Mitsubishi Heavy Ind Ltd Verfahren zum herstellen einer gussform
DE2619529A1 (de) * 1975-05-01 1976-11-18 Baker Perkins Holdings Ltd Verfahren und vorrichtung zum fuellen von giessereiformen oder kernkaesten mit einer formmischung auf sandbasis
DE2608740B1 (de) * 1976-03-03 1977-09-08 Eugen Dipl-Ing Buehler Verfahren zum verdichten von formsand

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116889A (en) * 1982-03-23 1983-10-05 Acme Conveyors & Constr A process of moulding a metal casting mould
FR2724336A1 (fr) * 1994-09-14 1996-03-15 Chardon Michel Georges Procede de moulage en sable siliceux alliant l'utilisation de sable a prise chimique et de sable sans liant sous depression
CN104325075A (zh) * 2014-10-08 2015-02-04 柳州金茂机械有限公司 一种v法铸造工艺
CN113400649A (zh) * 2021-06-30 2021-09-17 山东威高骨科材料股份有限公司 一种解决3d打印peek材料零件热变形的方法
CN113400649B (zh) * 2021-06-30 2023-07-04 山东威高骨科材料股份有限公司 一种解决3d打印peek材料零件热变形的方法

Also Published As

Publication number Publication date
EP0017902B1 (fr) 1983-05-18
DE2916211A1 (de) 1980-10-30
JPS55141354A (en) 1980-11-05
JPS6321576B2 (fr) 1988-05-07
DE2916211C2 (de) 1983-11-24

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