EP0257389A1 - Procédé et dispositif pour la production de mottes divisées - Google Patents

Procédé et dispositif pour la production de mottes divisées Download PDF

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Publication number
EP0257389A1
EP0257389A1 EP87111332A EP87111332A EP0257389A1 EP 0257389 A1 EP0257389 A1 EP 0257389A1 EP 87111332 A EP87111332 A EP 87111332A EP 87111332 A EP87111332 A EP 87111332A EP 0257389 A1 EP0257389 A1 EP 0257389A1
Authority
EP
European Patent Office
Prior art keywords
model plate
mask
model
molding material
molding
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.)
Withdrawn
Application number
EP87111332A
Other languages
German (de)
English (en)
Inventor
Eugen Dipl.-Ing. Bühler
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0257389A1 publication Critical patent/EP0257389A1/fr
Withdrawn legal-status Critical Current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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C11/00—Moulding machines characterised by the relative arrangement of the parts of same
    • B22C11/10—Moulding machines characterised by the relative arrangement of the parts of same with one or more flasks forming part of the machine, from which only the sand moulds made by compacting are removed

Definitions

  • the invention relates to a method for producing divided, boxless casting molds using at least one, preferably vertically movable machine mold box and two model plates which can be brought into engagement with the machine mold box, the respectively unused, free model plate outside of the effective range of the machine molding box is held in a waiting position, and according to a further inventive concept goes to a preferred device for performing this method.
  • a method of the type mentioned at the outset is from the DE-PSen 33 39 620 and 34 37 702 known.
  • This known technique has also proven itself per se, since this results in a comparatively simple structure in terms of the device. So far, however, only molding sand has been used to produce the two mold halves. Experience has shown, however, that particularly smooth surfaces and particularly high accuracies can only be achieved if the model surface is covered with a mask made of molding material, which is then backfilled with molding sand, as is known from DE-PS 29 23 044 per se is known.
  • the procedural solution to this problem is, according to the invention, that the model plate in the waiting position is acted upon with a mask molding material within the waiting time and that the mask formed and freed from excess mask molding material is then backfilled with molding sand during the subsequent interaction of the model plate and the machine mold box.
  • the excess of mask molding material can be removed before the model plate loaded with it leaves the waiting position, which results in an economical consumption of mask molding material.
  • the excess can be removed, for example, by simply tipping over, provided the mask molding material is simply poured on.
  • Another advantageous embodiment can consist in that the model plate is acted upon by mask molding material according to the vacuum shot principle from below. This ensures that the excess mask molding material automatically falls back into the container after the vacuum is removed.
  • the area of the model plate to be loaded with mask molding material can expediently be delimited by a peripheral frame.
  • the area to be coated with mask molding material can advantageously be limited to the model area. This not only results in an economical consumption of mask molding material, but also ensures that nozzles of the model plate or the model plate carrier, which are located outside the peripheral frame and via which the mold cavity is evacuated for the subsequent injection of sand, are not be covered with mask molding material.
  • a further expedient measure can consist in the fact that the model plate is preferably heated by a radiant heat source in the waiting position before the mask molding material is applied to it. This makes it possible to accelerate the baking of mask molding material, so that there are no delays in the rest of the process flow due to the production of the mask.
  • the molding cavity formed by the model plate and the machine mold box interacting with it can be loaded with molding sand from the side and / or preferably like the molding mold material from below. This ensures that there is no fear of turning the model plates between the exposure to mask molding material and molding sand.
  • the device according to the invention on which the drawing is based consists of two blocks 1 and 2, which are positioned next to one another and are suspended here and have receiving surfaces 3 located at the same height, each for a model plate 4 and 5.
  • the two model plates 4 and 5 are on the arms 6 attached to a two-armed swivel device 7, which the model plates 4 and 5 alternately from one frame 1 or 2 to the other trans ported and vice versa.
  • the vertical pivot axis of the pivot device 7 is indicated at a.
  • a roller conveyor etc. would of course also be conceivable to form a model plate transport device.
  • the model plates 4 and 5 and the jacks 1 and 2 are each provided with identical fixing devices 8, which here are formed by pins which engage in corresponding bores and which provide exact, reproducible positioning of the model plates 4 and 5 on the jacks 1 and 2 enable.
  • the block 1 shown on the left in the drawing is assigned a machine mold box 9, which can be moved up and down vertically here and can be brought into sealing engagement with the model plate fixed on the block 1, which encloses a mold cavity 10 on the model plate 4 that is fixed on the block 1 or 5 opposite side can be closed by a press plate 11 which can be moved into it.
  • the press plate 11 is provided with an inlet slot 13 connected to a sand bunker 12, through which a sand filling can be injected into the mold cavity 10, for example according to the vacuum shooting principle. For this purpose, the mold cavity 10 is suddenly evacuated.
  • This evacuation can take place via the model plate 4 or 5 fixed on the frame 1 and / or via the machine mold box 9 and / or, as in the exemplary embodiment shown, via the press plate 11.
  • this is provided with a collecting space 15, which is connected to the mold cavity 10 via nozzles 14 and which is connected via a vacuum line 16 to a vacuum source, not shown here.
  • the pressure plate can be used to measure appropriate dimensions are inserted into the machine mold box 9.
  • the model plate in this case the model plate 4, which does not interact with the machine mold box 9 and is in a waiting position, is first heated by a pivoting heating device 17, for example in the form of an infrared radiator, and then with a while the mold cavity 10 is exposed to sand Mask molding material applied.
  • a circumferential frame 18 is provided which is assigned to the model plate which is in the waiting position, here the block 2 receiving the model plate 4, which frame can be brought into engagement with the model plate 4 or 4 respectively positioned on the block 2 and which is connected to a container 19 for mask molding material is connected.
  • the frame 18 can have the same length and width as the machine mold box 9.
  • Such a frame like the machine mold box 9, can be used for all model plates, so that an exchange is not necessary.
  • the peripheral frame 18 is limited to the area of the models recorded on the model plates 4 and 5. Outside of the frame 18 there is no exposure to mask molding material, so that there is a very economical consumption of mask molding material. In addition, any existing nozzles that can be connected to a vacuum source can be kept open in the area of the model plates 4 and 5.
  • the molding cavity 20 encompassed by the peripheral frame 18 can also be acted upon by the mold molding principle, the abrupt Evacuation can take place via the respective model plate, provided that this is provided with appropriate nozzles that can be connected to a vacuum source.
  • the evacuation takes place via the peripheral frame 18, which is provided for this purpose with nozzles 22 connected to a vacuum line 21 leading to a vacuum source (not shown).
  • the mask molding material coming into contact with the heated model and the layers of the mask molding material close to the model bake into a mask. The remaining mask molding material falls back into the container 19 when the vacuum is removed.
  • the model plates 4 and 5, which can be brought into engagement with the machine mold box 9 or the peripheral frame 18, serve for the alternate production of the lower and upper bales of a two-part casting mold.
  • the manufacturing process begins by covering the model associated with the lower ball with a mask in the area of the surrounding frame 18. Subsequently, the mask is backed with molding sand in the area of the machine mold box 9, at the same time the model assigned to the upper bale is covered with a mask in the region of the peripheral frame 18.
  • the finished lower bale is then placed on a pallet 23 which can be moved in under the machine molding box 9 and can be brought outside its effective area and is brought with it outside the effective area of the machine molding box 9.
  • the pallet 23 can be moved into a core insertion station in which the required cores are inserted.
  • the model plate is changed and the upper bale is subsequently manufactured, ie the corresponding mask is backfilled with molding sand while at the same time covering the model associated with the lower bale with mask molding material, which is now again located in the area of the surrounding frame.
  • this is pivoted in the illustrated embodiment together with the machine mold box 9 about a horizontal axis of rotation through 180 ° and placed on the lower bale which has meanwhile been positioned below it.
  • the pallet 23 can be provided with fixing devices of the type indicated at 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
EP87111332A 1986-08-05 1987-08-05 Procédé et dispositif pour la production de mottes divisées Withdrawn EP0257389A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3626486 1986-08-05
DE19863626486 DE3626486A1 (de) 1986-08-05 1986-08-05 Verfahren und vorrichtung zur herstellung geteilter, kastenloser giessformen

Publications (1)

Publication Number Publication Date
EP0257389A1 true EP0257389A1 (fr) 1988-03-02

Family

ID=6306731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111332A Withdrawn EP0257389A1 (fr) 1986-08-05 1987-08-05 Procédé et dispositif pour la production de mottes divisées

Country Status (4)

Country Link
EP (1) EP0257389A1 (fr)
JP (1) JPH082478B2 (fr)
DE (1) DE3626486A1 (fr)
WO (1) WO1988000866A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000076691A1 (fr) * 1999-06-09 2000-12-21 Disa Industries A/S Procede de chauffage d'une plaque inferieure d'un appareil de moulage en chaine et appareil de moulage en chaine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3316121C1 (de) * 1983-05-03 1984-03-29 Michael 8900 Augsburg Achinger Formanlage zur Herstellung kastenloser Sandgießformen mittels Unterdruck
DE3339620C1 (de) * 1983-11-02 1984-04-26 Eugen Dipl.-Ing. 8877 Burtenbach Bühler Formanlage
EP0122116A2 (fr) * 1983-04-07 1984-10-17 Dansk Industri Syndikat A/S Machine pour la fabrication de moules en sable ou matériau semblable, à division horizontale sans châssis
DE3437702C1 (de) * 1984-10-15 1985-06-13 Eugen Dipl.-Ing. 8877 Burtenbach Bühler Verfahren und Formanlage zur Herstellung von horizontal geteilten kastenlosen Sandblock-Gießformen
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 (5)

* 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
EP0122116A2 (fr) * 1983-04-07 1984-10-17 Dansk Industri Syndikat A/S Machine pour la fabrication de moules en sable ou matériau semblable, à division horizontale sans châssis
DE3316121C1 (de) * 1983-05-03 1984-03-29 Michael 8900 Augsburg Achinger Formanlage zur Herstellung kastenloser Sandgießformen mittels Unterdruck
DE3339620C1 (de) * 1983-11-02 1984-04-26 Eugen Dipl.-Ing. 8877 Burtenbach Bühler Formanlage
DE3437702C1 (de) * 1984-10-15 1985-06-13 Eugen Dipl.-Ing. 8877 Burtenbach Bühler Verfahren und Formanlage zur Herstellung von horizontal geteilten kastenlosen Sandblock-Gießformen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000076691A1 (fr) * 1999-06-09 2000-12-21 Disa Industries A/S Procede de chauffage d'une plaque inferieure d'un appareil de moulage en chaine et appareil de moulage en chaine

Also Published As

Publication number Publication date
DE3626486A1 (de) 1988-02-11
JPH082478B2 (ja) 1996-01-17
JPH01500737A (ja) 1989-03-16
WO1988000866A1 (fr) 1988-02-11

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