EP1753564A2 - Procede de fabrication de pieces moulees - Google Patents
Procede de fabrication de pieces mouleesInfo
- Publication number
- EP1753564A2 EP1753564A2 EP05718370A EP05718370A EP1753564A2 EP 1753564 A2 EP1753564 A2 EP 1753564A2 EP 05718370 A EP05718370 A EP 05718370A EP 05718370 A EP05718370 A EP 05718370A EP 1753564 A2 EP1753564 A2 EP 1753564A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity
- gas
- melt
- mold
- metal
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 239000000155 melt Substances 0.000 claims abstract description 8
- 238000004512 die casting Methods 0.000 claims abstract description 7
- 229910001092 metal group alloy Inorganic materials 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 23
- 238000005266 casting Methods 0.000 claims description 19
- 238000007711 solidification Methods 0.000 claims description 7
- 230000008023 solidification Effects 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000000465 moulding Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
La présente invention concerne un procédé de fabrication de pièces moulées en alliages métalliques légers, en particulier un procédé de moulage sous pression permettant la fabrication de pièces moulées à poids réduit. A cet effet, après le remplissage de la cavité (2) du moule avec du métal fondu et le durcissement d'une couche périphérique, un gaz est introduit dans le métal fondu restant et le métal fondu est contraint hors de la cavité (2) du moule, formant ainsi un espace creux (5).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004017387A DE102004017387A1 (de) | 2004-04-05 | 2004-04-05 | Verfahren zur Herstellung von Gussteilen |
| PCT/IB2005/000899 WO2005097378A2 (fr) | 2004-04-05 | 2005-04-01 | Procede de fabrication de pieces moulees |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1753564A2 true EP1753564A2 (fr) | 2007-02-21 |
Family
ID=34962633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05718370A Ceased EP1753564A2 (fr) | 2004-04-05 | 2005-04-01 | Procede de fabrication de pieces moulees |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20070215307A1 (fr) |
| EP (1) | EP1753564A2 (fr) |
| JP (1) | JP2007531630A (fr) |
| DE (1) | DE102004017387A1 (fr) |
| WO (1) | WO2005097378A2 (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012108079B3 (de) * | 2012-08-31 | 2013-11-14 | Hochschule Aalen | Verfahren zur Herstellung hohler Salzkerne |
| US11635005B2 (en) | 2020-08-21 | 2023-04-25 | RB Distribution, Inc. | Oil filter assembly |
| DE102021111538A1 (de) * | 2021-05-04 | 2022-11-10 | Nemak, S.A.B. De C.V. | Gießvorrichtung und Verfahren zum Gießen |
| US12078090B1 (en) | 2024-02-29 | 2024-09-03 | Skyward Automotive Products LLC | Oil filter housing and assembly |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8315615D0 (en) * | 1983-06-07 | 1983-07-13 | Worswick Eng Ltd Alan | Casting hollow articles |
| DE3913109C5 (de) * | 1989-04-21 | 2010-03-18 | Ferromatik Milacron Maschinenbau Gmbh | Verfahren zum Spritzgießen fluidgefüllter Kunststoffkörper und Vorrichtung zur Durchführung des Verfahrens |
| 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 |
| JPH09510932A (ja) * | 1995-01-27 | 1997-11-04 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | 製品を射出成形する方法及び射出成形型、並びにこの方法で製造した製品 |
| DE19543944C2 (de) * | 1995-11-25 | 1998-04-09 | Battenfeld Gmbh | Verfahren zum Herstellen von Kunststoffgegenständen |
| 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 |
| DE10007994C2 (de) * | 2000-02-22 | 2003-11-13 | Battenfeld Gmbh | Verfahren und Vorrichtung zum Spritzgiessen von mindestens einen Hohlraum aufweisenden Formteilen |
| TW548173B (en) * | 2001-07-10 | 2003-08-21 | Cinpres Gas Injection Ltd | Process and apparatus for injection moulding a hollow plastics article |
| 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 JP JP2007506861A patent/JP2007531630A/ja active Pending
- 2005-04-01 US US11/547,792 patent/US20070215307A1/en not_active Abandoned
- 2005-04-01 WO PCT/IB2005/000899 patent/WO2005097378A2/fr not_active Ceased
- 2005-04-01 EP EP05718370A patent/EP1753564A2/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005097378A3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007531630A (ja) | 2007-11-08 |
| DE102004017387A1 (de) | 2005-10-20 |
| US20070215307A1 (en) | 2007-09-20 |
| WO2005097378A2 (fr) | 2005-10-20 |
| WO2005097378A3 (fr) | 2006-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20060920 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ LI |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): AT BE BG CH CY CZ LI |
|
| 17Q | First examination report despatched |
Effective date: 20071220 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
| 18R | Application refused |
Effective date: 20081110 |