EP0666127A2 - Procédé et chambre à vide pour la production de maquette en métal - Google Patents

Procédé et chambre à vide pour la production de maquette en métal Download PDF

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Publication number
EP0666127A2
EP0666127A2 EP95100606A EP95100606A EP0666127A2 EP 0666127 A2 EP0666127 A2 EP 0666127A2 EP 95100606 A EP95100606 A EP 95100606A EP 95100606 A EP95100606 A EP 95100606A EP 0666127 A2 EP0666127 A2 EP 0666127A2
Authority
EP
European Patent Office
Prior art keywords
vacuum chamber
wax
models
production
vacuum
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.)
Ceased
Application number
EP95100606A
Other languages
German (de)
English (en)
Other versions
EP0666127A3 (fr
Inventor
Walter Notar
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 EP0666127A2 publication Critical patent/EP0666127A2/fr
Publication of EP0666127A3 publication Critical patent/EP0666127A3/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns
    • 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
    • B22C9/04—Use of lost patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/15—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using vacuum

Definitions

  • the invention is based on a method for producing models according to the preamble of the first claim.
  • Vacuum chambers have been used in the past in particular for the casting of cold liquid two-component plastics in the production of plastic models, as is the case e.g. is shown in DE-PS L 14083 X / 39a.
  • components for a silicone mass for producing a silicone mold - as described in A. Menden "G manerei Modellbau” G corderei - Verlag Düsseldorf, 1991, pp. 281, 547 - were mixed, stirred and filled into a mold container which contained the original model . This container was then degassed in the vacuum chamber. This process took a lot of time because the stirring and pouring off included a high proportion of air. After curing, the original model was removed by cutting the silicone block in half.
  • Swivel devices were attached in the vacuum chamber, which could be actuated from the outside via a mechanical connection.
  • a vessel with hardener was inserted into one of the swivel devices, and a stirring vessel with the plastic compound to be cast was inserted into another. After the vacuum had been built up, one swivel device was actuated and the hardener was poured into the mixing vessel. An agitator installed above the swivel device was immersed with its stirrer in the mixing vessel and put into operation. The silicone mold was placed under the swivel mechanism. After a corresponding stirring time, the swivel device was actuated from the outside. This was constructed in such a way that the vessel dives away under the rotating stirrer when it is moving and at the same time is brought into an inclined position in which the liquid plastic pours into the mold. After the mass had solidified, the chamber was opened and the plastic part was removed from the mold. The plastic parts created in this way do not meet all requirements, however, since they can only withstand loads to a limited extent.
  • the object is achieved by a method with the features of claim 1 and a vacuum chamber with the features of claim 3.
  • the finished investment molds are also cast under vacuum with the desired metal.
  • these shapes must be permeable to air to ensure that trapped air can escape to the outside.
  • the molds can be created in a simple manner by pouring the ceramic models over the wax models. In order to achieve a smooth surface without air pockets, this is also advantageously done under vacuum.
  • a stereolithographically created model can preferably be used as the original model. Since these models are fully computer-controlled, they can be produced from the construction screen practically without intermediate steps and without wasting time. Using certain algorithms, shrinkage measurements can also be included in the original model immediately.
  • a vacuum chamber can be used, as described in claim 3. All facilities for the production of silicone molds, The wax models and the investment casting molds can also be used to cast the investment casting molds with the metal without difficulty and can be controlled from the outside. Because the devices are not directly attached to the vacuum chamber, a considerable amount of time can be saved by using several racks. For example, a frame for casting wax in silicone molds can be prepared outside the chamber without space and time constraints, with the help of a second frame the silicone molds can be created at the same time in the vacuum chamber. To ensure easy replacement of the frames, they are equipped with transport rollers.
  • Storage containers for the masses to be poured are advantageously already provided in the vacuum chamber. From there, the required quantities are already vacuum, e.g. conveyed by metering pumps into the corresponding mixing vessels or even directly into the molds. Storage containers for masses to be processed are heated.
  • models made of other materials e.g. can be cast from engineering plastics such as PA, PE or PP.
  • a pressure-resistant boiler 1 is provided with a door 2 into which a glass pane 3 is inserted.
  • a pump and control unit 4 is located on the boiler 1.
  • a control panel 5 with a display 6 is attached to the boiler 1.
  • the control panel 5 is connected to the pump and control unit 4 via a flexible line 7.
  • Another line 8 leads from the control unit through the wall of the boiler 1 to a connector 9 in the interior of the boiler.
  • the pump is connected to the interior of the boiler through invisible pipes and valves.
  • the frame 10 is located in the interior of the boiler 1. Lines to several connection options 11, 12, 13 for electrical devices are laid in this frame. These lines open into a cable 14 which can be coupled to the connector 9 via a further connector 15. Both the supply voltage and control signals are transmitted via this cable.
  • adjustable fastening devices 16, 17, 18 are provided on the frame 10 for receiving the required equipment.
  • a swiveling device 19 an agitator 20 connected thereto and an agitating vessel 21 likewise connected to the swiveling device are shown.
  • a funnel 22 and a heating and holding plate 23 for the mold 24 are also attached.
  • the frame 10 is provided with rollers 25 for easy loading and unloading of the vacuum chamber.
  • Fig. 2 and Fig. 3 show other assemblies, which are described in detail in the explanation of the method become.
  • the frame 10 is advantageously equipped in accordance with FIG.
  • a mold box 26 is placed on the holder 16, in which the master model is suspended in a known manner.
  • a metering pump 27 is plugged onto the fastening device 17, which doses the mixing components accordingly, mixes them and feeds them to the molding box 26.
  • the casting components are stored in the containers 28, 29, which are also attached to other fastening devices.
  • the fully assembled frame 10 is inserted into the boiler 1 and the connector 15 is coupled to the connector 9.
  • the vacuum chamber is then closed and the interior evacuated.
  • the metering pump 27 is started and the molding box 26 is filled with silicone mixed from the components.
  • the original model suspended in the molding box is thus enclosed in the silicone without bubbles.
  • the door 2 can be opened in a very short time and the frame can be moved out to harden. The vacuum chamber is therefore immediately available for other applications.
  • FIG. 1 Another frame corresponding to the frame in FIG. 1 can be prepared for the casting of the wax models.
  • a further plug connection can be provided, with which the connector 15 can be coupled while the frame is being prepared outside the chamber.
  • This plug connection is also connected to the control. In this way, the wax can be heated up and liquefied during the assembly.
  • the rack is then moved back into the chamber, the door closed and the process started.
  • the swivel device 19 is actuated and the wax is poured into the heated silicone mold 24 via the funnel 22.
  • the frame can be taken out of the chamber to harden the wax.
  • demolded wax models are then hung in mold boxes in the same way as the original model and in turn cast with ceramic mass or preferably with gypsum paste in the vacuum chamber.
  • ceramic mass or preferably with gypsum paste in the vacuum chamber.
  • FIG. 3 A frame equipped for the metal casting is shown in FIG. 3.
  • the investment casting mold produced from the plaster, from which the wax has already been melted out, is placed in the heatable vessel 30.
  • the funnel 31 shown is part of the investment casting mold.
  • a heatable pouring vessel 32 is attached to the frame 10 with a pivoting device above the opening of the funnel 31.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP95100606A 1994-01-19 1995-01-18 Procédé et chambre à vide pour la production de maquette en métal Ceased EP0666127A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944401475 DE4401475C1 (de) 1994-01-19 1994-01-19 Verfahren und Vakuumkammer zur Herstellung von Metallmodellen
DE4401475 1994-01-19

Publications (2)

Publication Number Publication Date
EP0666127A2 true EP0666127A2 (fr) 1995-08-09
EP0666127A3 EP0666127A3 (fr) 1998-01-07

Family

ID=6508247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95100606A Ceased EP0666127A3 (fr) 1994-01-19 1995-01-18 Procédé et chambre à vide pour la production de maquette en métal

Country Status (2)

Country Link
EP (1) EP0666127A3 (fr)
DE (1) DE4401475C1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019772A1 (fr) * 1995-11-28 1997-06-05 Formkon Aps, Skive Procedes de realisation d'un modele servant a la formation d'un moule en plusieurs parties et de fabrication dudit moule
US6460594B1 (en) 1998-03-16 2002-10-08 Hang Fung Jewellery Co., Ltd. Method of forming a metal statuette of a three-dimensional object
CN108889906A (zh) * 2018-07-06 2018-11-27 天津千鑫有色金属制品有限公司 一种汽车刹车泵铝合金铸件的铸造方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19613098A1 (de) * 1996-04-01 1997-10-02 Speedform Gmbh Verfahren zur Herstellung von Musterwerkzeugen
DE19726112C1 (de) * 1997-06-20 1998-10-01 Speedform Gmbh Verfahren zum Herstellen einer Gießform aus Silikon
DE19851250C2 (de) * 1998-11-06 2002-07-11 Ip & P Innovative Produkte Und Verfahren zum Herstellen offenporiger, metallischer Gitterstrukturen und Verbundgussteile sowie Verwendung derselben
DE10008384C2 (de) 2000-02-23 2002-07-18 Sandor Cser Verfahren zur Herstellung einer oxidationshemmenden Titangußform
FR2806649B1 (fr) * 2000-03-24 2002-05-10 Creafusion Procede et dispositif de fonte a cire perdue

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989088A (en) * 1975-12-29 1976-11-02 Ipco Hospital Supply Corporation (Whaledent International Division) Casting machine and improved control circuit for operation
AU6340986A (en) * 1985-09-30 1987-04-02 Athol Henry Girdlestone Vacuum casting device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989088A (en) * 1975-12-29 1976-11-02 Ipco Hospital Supply Corporation (Whaledent International Division) Casting machine and improved control circuit for operation
AU6340986A (en) * 1985-09-30 1987-04-02 Athol Henry Girdlestone Vacuum casting device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DIPL.-ING.- ALBERT MENDEN: "Giesserei Modellbau, Seite 281 und 547" 1991 , GIESSEREI-VERLAG , D]SSELDORF XP002045497 * Seite 281, Absatz 1 * *
DIPL.-ING. HANS ALLENDORF: "Pr{zisionsgiessverfahren mit Ausschmelzmodellen, Seite 6 und 136-138" 1958 , FACHBUCHVERLAG LEIPZIG 1958 , LEIPZIG XP002045498 *
HELMUT VOLLMER ET AL.: "Neue Vakuum-Schmelz- und Giessanlage zur Hestellung von Feinguss f}r Fahrzeugturbinen" GIESSEREI, Bd. 62, Nr. 7, 1975, D]SSELDORF, Seiten 155-158, XP002045496 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019772A1 (fr) * 1995-11-28 1997-06-05 Formkon Aps, Skive Procedes de realisation d'un modele servant a la formation d'un moule en plusieurs parties et de fabrication dudit moule
US6158497A (en) * 1995-11-28 2000-12-12 Formkon Aps Method for producing a model and a method for producing a multisection mould using the model
US6460594B1 (en) 1998-03-16 2002-10-08 Hang Fung Jewellery Co., Ltd. Method of forming a metal statuette of a three-dimensional object
CN108889906A (zh) * 2018-07-06 2018-11-27 天津千鑫有色金属制品有限公司 一种汽车刹车泵铝合金铸件的铸造方法

Also Published As

Publication number Publication date
EP0666127A3 (fr) 1998-01-07
DE4401475C1 (de) 1995-06-14

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