EP0067413A1 - Dispositif pour la fabrication de moules - Google Patents

Dispositif pour la fabrication de moules Download PDF

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Publication number
EP0067413A1
EP0067413A1 EP82105047A EP82105047A EP0067413A1 EP 0067413 A1 EP0067413 A1 EP 0067413A1 EP 82105047 A EP82105047 A EP 82105047A EP 82105047 A EP82105047 A EP 82105047A EP 0067413 A1 EP0067413 A1 EP 0067413A1
Authority
EP
European Patent Office
Prior art keywords
vacuum
backfill
sieve
lines
sieve surface
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
EP82105047A
Other languages
German (de)
English (en)
Other versions
EP0067413B1 (fr
Inventor
Herbert 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
Application filed by Heinrich Wagner Sinto Maschinenfabrik GmbH filed Critical Heinrich Wagner Sinto Maschinenfabrik GmbH
Priority to AT82105047T priority Critical patent/ATE10813T1/de
Publication of EP0067413A1 publication Critical patent/EP0067413A1/fr
Application granted granted Critical
Publication of EP0067413B1 publication Critical patent/EP0067413B1/fr
Expired legal-status Critical Current

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Classifications

    • 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 device for the production of casting molds from fireproof, binder-free material as backfill, which have a mold that encloses the mold cavity and is pressed against it by the negative pressure that can be generated by the inside of the backfill, with at least one vacuum line arranged in the space receiving the backfill evacuation openings distributed over their circumference.
  • the device consists of a frame-shaped structure, in one side of which a vacuum collecting duct is arranged, which is provided with a connection via which the vacuum collecting duct can be connected to a vacuum source, for example a vacuum pump.
  • a vacuum source for example a vacuum pump.
  • vacuum manifold vacuum lines are firmly connected on one side, which protrude into the space receiving the backfill and penetrate it.
  • the invention has for its object to provide a device of the type mentioned in such a way that even if the vacuum lines are damaged, penetration of the backfill and liquid material into the vacuum system of the device is prevented, thus preventing possible damage to the device, the vacuum system and accidents and that the vacuum lines contained in the device are easily replaceable.
  • the device has on at least one wall a vacuum collecting channel, which is opened via a screen surface to the space receiving the backfill and that the vacuum line is also provided on its front side facing the screen surface with a screen surface which in a distance from the sieve surface of the negative pressure collecting duct allowing the entry of backfill material is arranged.
  • the device has at least two opposite sides of the vacuum collecting channels arranged in the side walls, each of which is opened to the inside of the device via a screen surface, with vacuum lines, the length of which is somewhat smaller, inserted between two opposite screen surfaces of the vacuum collecting channels in the space receiving the backfill than the distance between the opposite sieve surfaces and the end faces of which are each closed by a sieve surface.
  • a device thus has vacuum lines embedded in the backfill, which have no mechanical connection to the side walls of the device.
  • the vacuum lines themselves are closed on all sides and have sieve surfaces on both their end faces and on their peripheral surfaces, through which the air contained in the backfill can be sucked in.
  • These vacuum lines are loosely placed in the backfill, ie in the device, the screen surfaces of the vacuum lines opposite the screen surfaces in the walls of the device. Since the vacuum lines are shorter than the distance between opposite screen surfaces, there remains a distance between the screen surfaces of the device and the screen surfaces of the vacuum lines, which is filled with backfill.
  • the vacuum lines lying in the backfill mass are thus coupled to the vacuum system of the device with the interposition of a defined layer of backfill mass.
  • any vacuum line is damaged, it can simply be removed from the device because there are no mechanical connections.
  • Another advantage is that due to the loose arrangement of the vacuum lines in the device, these can be laid at the most convenient locations in foundry technology. On the other hand, this means that a device according to the invention is suitable for different casting molds.
  • the vacuum lines can be installed in the device without any fastening. However, it is advantageous to place the vacuum lines on supports arranged on the side walls having the screen surfaces, which advantageously have spacer elements, with the aid of which the distance of the end faces of the vacuum lines from the screen surfaces is determined.
  • the vacuum lines are advantageously held on the supports with the aid of quick attachments in the form of resilient tabs.
  • the ends of the vacuum lines are expanded in a trumpet shape, so that the cross section of the front screen surface is larger than the cross section of the other vacuum line.
  • the device 1 according to the invention shown in FIGS. 1 and 2 consists of a rectangular molding box 2, which is open on its lower and upper side, in the side walls of which a circumferential vacuum collecting duct 3 is arranged. To the interior of the device 1, this vacuum collecting duct is opened on two opposite sides 5, 6 via a sieve surface 4. A plurality of supports 7 are attached to the screen surfaces 4 and serve to receive a vacuum line 8. The length of this vacuum line 8 is slightly less than the distance between the two opposite sieve surfaces 4. This means that between each sieve surface 4 and the end face 9 of the vacuum line 8, an intermediate space is formed, which is filled with backfill when filling the backfill 10 into the device 9 is.
  • the supports 7 are of stepped design and form a stop 11 for the vacuum line 8, so that the latter is fixed at a distance from the sieve surfaces 4.
  • a resilient tab 12 which extends over the end of the vacuum line 8 and presses it against the support 7.
  • the vacuum line 8 which has evacuation openings on its entire circumferential surface, is trumpet-shaped at both ends, so that the screen surfaces 13 formed on its end faces have a larger cross section than the cross section of the rest Vacuum line 8. This provides better coupling of the vacuum line 8 to the vacuum manifold 3 in the device 1.
  • This vacuum manifold 3 is provided with a connection 14 through which the vacuum channel to a vacuum source, for. B. a vacuum pump can be connected.
  • the device 1 according to the invention is placed on a model plate 16 which carries a model 15.
  • the model plate 16 is in turn provided with a vacuum channel 17, which can be connected via a connection 18 to a vacuum source, not shown.
  • the U n-tertikkanal 17 is connected via holes 19 to the top of the model plate, so that the film 20 placed on the model plate is sucked onto the model plate and the model.
  • 8 backfill agent is then poured in via the still free upper side of the device 1 and, if necessary, pre-compressed by means of a vibrator.
  • a cover film 21 is then placed on the device 1 and the interior of the device is evacuated via the vacuum collecting duct 3 and the evacuation lines 8.
  • the vacuum line 8 is coupled to the vacuum collecting duct 3 via a thin layer of backfill material located between the two screen surfaces 4 and 13 of the device or the vacuum line 8.
  • the thickness of this backfill layer is determined by the distance between the two screen surfaces 4 and by the length of the vacuum line 8.
  • the Negative pressure in the negative pressure line 17 of the model plate 16 is released so that the device 1 can now be lifted off the model plate 16.
  • the other G conceivablformhtag is prepared in the same manner and the casting takes place after assembly of the two mold halves in a mold.
  • Damaged vacuum lines 8 are very easy to replace in a device according to the invention, since, if mechanical holders are provided in the device at all, they are only held by simple clamping devices. The vacuum lines can be replaced in just a few simple steps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP82105047A 1981-06-12 1982-06-09 Dispositif pour la fabrication de moules Expired EP0067413B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82105047T ATE10813T1 (de) 1981-06-12 1982-06-09 Vorrichtung fuer die herstellung von giessformen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3123363A DE3123363C1 (de) 1981-06-12 1981-06-12 Vorrichtung fuer die Herstellung von Giessformen
DE3123363 1981-06-12

Publications (2)

Publication Number Publication Date
EP0067413A1 true EP0067413A1 (fr) 1982-12-22
EP0067413B1 EP0067413B1 (fr) 1984-12-19

Family

ID=6134566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82105047A Expired EP0067413B1 (fr) 1981-06-12 1982-06-09 Dispositif pour la fabrication de moules

Country Status (3)

Country Link
EP (1) EP0067413B1 (fr)
AT (1) ATE10813T1 (fr)
DE (1) DE3123363C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2649916A1 (fr) * 1989-07-18 1991-01-25 Ferrer Erick Moule universel a surfaces de moulage adaptables pour le moulage de matieres plastiques, ceramiques ou autres materiaux

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3318702C1 (de) * 1983-05-21 1984-03-29 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Formkasten fuer das Vakuumformverfahren
JP5532406B2 (ja) * 2010-03-10 2014-06-25 新東工業株式会社 減圧造型用鋳枠
CN101954448A (zh) * 2010-11-12 2011-01-26 侯松发 在负压造型工艺中用的封闭气室模型
CN103567395A (zh) * 2013-09-30 2014-02-12 张家港万富安化工设备铸件装备有限公司 一种用于翻砂铸造的抽真空装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1536795A1 (de) * 1967-04-20 1969-10-30 Ferch & Nabben Filterelement
DE2511620A1 (de) * 1974-03-16 1975-09-25 Sintokogio Ltd Verfahren und vorrichtung zur herstellung von vakuumgedichteten giessformen
DE2248968C3 (de) * 1971-10-08 1975-10-09 K.K. Akita, Susaka, Nagano (Japan) Vorrichtung für die Herstellung einer Gießform
DE8029438U1 (de) * 1980-11-05 1981-03-19 Passavant-Werke Michelbacher Hütte, 6209 Aarbergen Formkasten fuer das vakuumformverfahren

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825058A (en) * 1972-04-15 1974-07-23 Sintokogio Ltd Mold prepared by vacuum sealed molding process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1536795A1 (de) * 1967-04-20 1969-10-30 Ferch & Nabben Filterelement
DE2248968C3 (de) * 1971-10-08 1975-10-09 K.K. Akita, Susaka, Nagano (Japan) Vorrichtung für die Herstellung einer Gießform
DE2511620A1 (de) * 1974-03-16 1975-09-25 Sintokogio Ltd Verfahren und vorrichtung zur herstellung von vakuumgedichteten giessformen
DE8029438U1 (de) * 1980-11-05 1981-03-19 Passavant-Werke Michelbacher Hütte, 6209 Aarbergen Formkasten fuer das vakuumformverfahren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2649916A1 (fr) * 1989-07-18 1991-01-25 Ferrer Erick Moule universel a surfaces de moulage adaptables pour le moulage de matieres plastiques, ceramiques ou autres materiaux

Also Published As

Publication number Publication date
ATE10813T1 (de) 1985-01-15
EP0067413B1 (fr) 1984-12-19
DE3123363C1 (de) 1982-11-04

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