WO2005097378A2 - Verfahren zur herstellung von gussteilen - Google Patents
Verfahren zur herstellung von gussteilen Download PDFInfo
- Publication number
- WO2005097378A2 WO2005097378A2 PCT/IB2005/000899 IB2005000899W WO2005097378A2 WO 2005097378 A2 WO2005097378 A2 WO 2005097378A2 IB 2005000899 W IB2005000899 W IB 2005000899W WO 2005097378 A2 WO2005097378 A2 WO 2005097378A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cavity
- gas
- melt
- mold
- metal
- Prior art date
Links
Classifications
-
- 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
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/04—Casting hollow ingots
Definitions
- the invention relates to a method for producing castings from light metal alloys, in particular by die casting, according to the preamble of the claim.
- DE-A-3240242 describes a process for die casting with simultaneous exposure to gas back pressure. It is characteristic that the cavity of the casting mold and a horizontal pressure chamber are separated before the casting process begins, after which a gas pressure is generated in the cavity of the casting mold and at the same time the melt is poured into the horizontal pressure chamber, while at the start of the casting the cavity and the space of the horizontal pressure chamber. The gas pressure is independent of the flow of the melt.
- DE-OS 2823173 discloses a method for casting metal in a rotating mold, in which the surface of the molten metal is simultaneously protected by liquefied inert gas during the casting process.
- the gas is poured onto both the melt surface and the inside of the rotating mold.
- a first metal is poured, which lies against the mold wall by centrifugation and solidifies to form a first, outer layer, whereupon the supply of the liquid gas begins.
- at least a second layer is cast analogously.
- the liquid gas that continues to be filled fills the inner cavity of the mold until a finished turning piece is obtained.
- the invention is based on known injection molding processes for plastic parts, in which cavities are created in the cavity by injection of a gas with a uniform gas pressure. Due to the very different thermophysical properties of the solidification of metal melts compared to thermoplastics, it is not possible to simply transfer these processes to the die casting of metal castings. Not only are the working temperatures higher, the solidification is also much faster, so that a casting cycle is therefore much faster.
- the gas injection method can be carried out using
- a cavity is filled with melt and a secondary cavity (overflow cavity) of the mold is closed b) after solidification of an edge layer, gas is introduced into the remaining melt by an injector and access to the secondary cavity is opened c) the remaining melt reaches the secondary cavity, at least one cavity remains in the casting d) venting of the cavities, partial removal and removal of the secondary cavity part.
- Nitrogen is preferably used as the gas, but any other inert gas is also suitable.
- alloys with a short solidification interval should preferably be used, for example zinc, aluminum or magnesium alloys. Sink marks and / or distortion can be prevented by means of local emphasis.
- the solidification front of the metal solidifies under the influence of gas pressure. This leads to the formation of a smooth-walled solidification. This aspect is of the utmost importance for the later use of hollow cast parts as a media-carrying line, be it gas or a fluid, since the flow resistance is greatly reduced by the smooth wall of the inner surface.
- Lightweight castings such as door handles or oil filter housings can be reached.
- Metal melt located in the casting chamber 1 of a die casting machine is pressed into a mold cavity 2 by means of a casting piston via an optional valve 6 (the method can also be carried out without using a valve 6).
- Another valve 7 to a secondary cavity 4 is closed.
- nitrogen is introduced into the mold cavity 2 or, respectively, into the remaining melt via a gas injector 3, and at the same time the valve 7 to the secondary cavity 4 is opened.
- the valve 6 is now closed.
- the remaining amount of molten metal is reduced to zero due to the gas pressure.
- bone cavity 4 displaced.
- At least one cavity 5 is formed in the mold cavity 2 or in the casting.
- the cavities, in particular the cavity 5, are then vented via the gas injector 3, and the cast part can be removed from the mold and processed further.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007506861A JP2007531630A (ja) | 2004-04-05 | 2005-04-01 | 鋳造品の製造方法 |
US11/547,792 US20070215307A1 (en) | 2004-04-05 | 2005-04-01 | Method for Manufacturing Cast Parts |
EP05718370A EP1753564A2 (de) | 2004-04-05 | 2005-04-01 | Verfahren zur herstellung von gussteilen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004017387.7 | 2004-04-05 | ||
DE102004017387A DE102004017387A1 (de) | 2004-04-05 | 2004-04-05 | Verfahren zur Herstellung von Gussteilen |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005097378A2 true WO2005097378A2 (de) | 2005-10-20 |
WO2005097378A3 WO2005097378A3 (de) | 2006-04-06 |
Family
ID=34962633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2005/000899 WO2005097378A2 (de) | 2004-04-05 | 2005-04-01 | Verfahren zur herstellung von gussteilen |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070215307A1 (de) |
EP (1) | EP1753564A2 (de) |
JP (1) | JP2007531630A (de) |
DE (1) | DE102004017387A1 (de) |
WO (1) | WO2005097378A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022234378A1 (de) | 2021-05-04 | 2022-11-10 | Nemak. S.A.B. De C.V. | Giessvorrichtung und verfahren zum giessen |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012108079B3 (de) * | 2012-08-31 | 2013-11-14 | Hochschule Aalen | Verfahren zur Herstellung hohler Salzkerne |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3403186A1 (de) * | 1983-06-07 | 1984-12-13 | Alan Worswick (Engineering) Ltd. | Verfahren und vorrichtung zum giessen von hohlkoerpern |
US5423667A (en) * | 1989-04-21 | 1995-06-13 | Ferromatik Milacron Maschinenbau Gmbh | Apparatus for the injection molding of fluid-filled plastic bodies |
US5928677A (en) * | 1995-11-25 | 1999-07-27 | Battenfeld Gmbh | Apparatus for producing hollow plastic objects with pressurized gas injection after overflow cut-off |
US5997799A (en) * | 1995-01-27 | 1999-12-07 | U.S. Philips Corporation | Method for injection-moulding a hollow product using a pressure variation between two gas volumes |
WO2003006226A1 (en) * | 2001-07-10 | 2003-01-23 | Cinpres Gas Injection Limited | Process and apparatus for injection moulding |
DE10007994C2 (de) * | 2000-02-22 | 2003-11-13 | Battenfeld Gmbh | Verfahren und Vorrichtung zum Spritzgiessen von mindestens einen Hohlraum aufweisenden Formteilen |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2791421B2 (ja) * | 1989-10-05 | 1998-08-27 | 旭化成工業株式会社 | 中空型物の成形方法 |
JPH04210861A (ja) * | 1990-11-30 | 1992-07-31 | Aaru Pii Toupura Kk | パイプ製品の製造方法 |
JP3441043B2 (ja) * | 1997-03-28 | 2003-08-25 | 新東工業株式会社 | 低融点金属中子の製造方法 |
JP2000263212A (ja) * | 1999-03-17 | 2000-09-26 | Aisin Takaoka Ltd | 中空部をもつ鋳造品の製造方法及びこれに使用できる装置 |
US6767487B2 (en) * | 2001-07-10 | 2004-07-27 | Cinpres Gas Injection Ltd. | Plastic expulsion process |
-
2004
- 2004-04-05 DE DE102004017387A patent/DE102004017387A1/de not_active Withdrawn
-
2005
- 2005-04-01 EP EP05718370A patent/EP1753564A2/de not_active Ceased
- 2005-04-01 JP JP2007506861A patent/JP2007531630A/ja active Pending
- 2005-04-01 WO PCT/IB2005/000899 patent/WO2005097378A2/de not_active Application Discontinuation
- 2005-04-01 US US11/547,792 patent/US20070215307A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3403186A1 (de) * | 1983-06-07 | 1984-12-13 | Alan Worswick (Engineering) Ltd. | Verfahren und vorrichtung zum giessen von hohlkoerpern |
US5423667A (en) * | 1989-04-21 | 1995-06-13 | Ferromatik Milacron Maschinenbau Gmbh | Apparatus for the injection molding of fluid-filled plastic bodies |
US5997799A (en) * | 1995-01-27 | 1999-12-07 | U.S. Philips Corporation | Method for injection-moulding a hollow product using a pressure variation between two gas volumes |
US5928677A (en) * | 1995-11-25 | 1999-07-27 | Battenfeld Gmbh | Apparatus for producing hollow plastic objects with pressurized gas injection after overflow cut-off |
DE10007994C2 (de) * | 2000-02-22 | 2003-11-13 | Battenfeld Gmbh | Verfahren und Vorrichtung zum Spritzgiessen von mindestens einen Hohlraum aufweisenden Formteilen |
WO2003006226A1 (en) * | 2001-07-10 | 2003-01-23 | Cinpres Gas Injection Limited | Process and apparatus for injection moulding |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Section Ch, Week 199127 Derwent Publications Ltd., London, GB; Class A32, AN 1991-197080 XP002351851 -& JP 03 121820 A (ASAHI CHEM IND CO LTD) 23. Mai 1991 (1991-05-23) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022234378A1 (de) | 2021-05-04 | 2022-11-10 | Nemak. S.A.B. De C.V. | Giessvorrichtung und verfahren zum giessen |
DE102021111538A1 (de) | 2021-05-04 | 2022-11-10 | Nemak, S.A.B. De C.V. | Gießvorrichtung und Verfahren zum Gießen |
Also Published As
Publication number | Publication date |
---|---|
US20070215307A1 (en) | 2007-09-20 |
WO2005097378A3 (de) | 2006-04-06 |
EP1753564A2 (de) | 2007-02-21 |
JP2007531630A (ja) | 2007-11-08 |
DE102004017387A1 (de) | 2005-10-20 |
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