EP1034863A1 - Procédé pour la coulée sous pression de métaux légers - Google Patents

Procédé pour la coulée sous pression de métaux légers Download PDF

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Publication number
EP1034863A1
EP1034863A1 EP99810195A EP99810195A EP1034863A1 EP 1034863 A1 EP1034863 A1 EP 1034863A1 EP 99810195 A EP99810195 A EP 99810195A EP 99810195 A EP99810195 A EP 99810195A EP 1034863 A1 EP1034863 A1 EP 1034863A1
Authority
EP
European Patent Office
Prior art keywords
mold cavity
oxygen
liquid metal
die
evacuation
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Withdrawn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
EP99810195A
Other languages
German (de)
English (en)
Inventor
Hans Thurner
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
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 Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to EP99810195A priority Critical patent/EP1034863A1/fr
Priority to US09/501,696 priority patent/US6308766B1/en
Priority to CA002299078A priority patent/CA2299078A1/fr
Priority to BR0000718-8A priority patent/BR0000718A/pt
Publication of EP1034863A1 publication Critical patent/EP1034863A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/14—Machines with evacuated die cavity

Definitions

  • the invention relates to a method for die casting light metals, in particular Aluminum and aluminum alloys, the liquid metal in filled a filling chamber and by means of a piston from the filling chamber in a mold cavity is shot.
  • liquid metal is placed in a filling chamber filled and by means of a piston from the filling chamber into one Mold cavity of a die casting machine shot.
  • Most of Gases such as air or water vapor are emitted by the injected displaced liquid metal from the mold cavity.
  • the mold cavity is previously up to a residual pressure of about 200 to 500 mbar, in the case of special vacuum pressure casting processes even on one Residual pressure of less than 100 mbar evacuated.
  • Pore Free Die Casting for die-casting aluminum parts
  • the mold cavity is flooded with oxygen before the metal is injected into the mold cavity, the pressure being set higher than the atmospheric pressure so that the gases in the Mold cavity to be replaced by oxygen. Since the oxygen introduced into the mold cavity flows through narrow gaps and areas and after a certain flood period the majority of the gases previously present in the mold cavity are displaced from the mold cavity, the renewed penetration of atmospheric gases into the mold cavity can be prevented.
  • the liquid aluminum is subsequently shot into the mold cavity, the aluminum reacts with oxygen to form Al 2 O 3 , which remains in the form of a dispersion of fine particles in the die-cast part without significantly changing its properties.
  • the present invention is therefore based on the object of a method to create die casting of the type mentioned, with which the Inclusion of gases is significantly reduced and thereby the above mentioned Problems of pore and bubble formation in die cast parts can be prevented can.
  • the mold cavity leads to the achievement of the object according to the invention pre-evacuated, flooded with oxygen after pre-evacuation, after flooding evacuated with oxygen and before the liquid metal was injected and then shot the liquid metal into the mold cavity becomes.
  • the essential essence of the invention lies in the combination of the known Vacuum die casting process with the PFD process. So that can be shown Disadvantages of the individual methods are eliminated in a simple manner become. By pre-evacuating the mold cavity, the remaining amount in air and water vapor can already be significantly reduced, so that subsequent flooding of the mold cavity with oxygen to a practical complete removal of the residual gases. With the inventive Processes are excellent even at a relatively low vacuum Results.
  • the mold cavity is pre-evacuated before flooding with oxygen to a residual pressure of less than 100 mbar.
  • the mold cavity When the mold cavity is flooded with oxygen, the mold cavity becomes expediently a pressure above atmospheric pressure maintain.
  • die-cast parts from aluminum or an aluminum alloy with a content of less than 1 cm 3 of enclosed gases per 100 g of aluminum is possible.
  • Such die-cast parts have excellent mechanical properties and can be used for functional structural parts such as safety parts in automobile construction.
  • the die-cast parts produced according to the invention can be heat-treated or welded without the risk of bubbles generated by enclosed gases.
  • a particularly advantageous application of the method according to the invention results in combination with MFT "- or HQC "process, ie with die casting processes and devices as disclosed in EP-A-0759825 and in DEC-3002886.
  • a die casting machine 10 also includes a die casting mold 12 a mold cavity 14 which communicates with a filling chamber 16.
  • Liquid metal 20 is filled into the filling chamber 16 via a filling opening 18 and with a piston 24 which can be actuated via a piston rod 22 in the Mold cavity 14 shot.
  • the mold cavity has been filled 14 with liquid metal 20, this is cooled and solidifies according to one profile defined by the inner surface of the die-casting mold 12.
  • One on die-cast part produced in this way is inserted into the mold cavity 24 ejected ejector pins 26 after the die casting has cooled the die casting mold 12 ejected.
  • a vacuum suction line 28 connects the mold cavity 14 to a vacuum pump 30. Since when the mold cavity 14 is evacuated via the vacuum suction line 28 there is a risk that air and water vapor along the Ejector pins 26 penetrate into the mold cavity 14 between the Ejector pins 26 and their guidance and between the mold halves Die casting mold 12 applied a sealant 32. On the other hand, the Filling opening 18 of the filling chamber 26 is closed with the piston 24, so that no air and no water vapor through the fill opening 18 into the interior of the Filling chamber 16 can penetrate.
  • an oxygen nozzle 34 For flooding the filling chamber 16 and the mold cavity 14 with oxygen After evacuation, an oxygen nozzle 34 is opened so that oxygen get into the interior of the filling chamber 16 and from there into the mold cavity 14 can.
  • the oxygen nozzle 34 is connected to an oxygen source via a regulating valve 36 38 connected.
  • the mold cavity 14 is evacuated via the vacuum suction line 28, the penetration of air and water vapor into the mold cavity 14 and in the filling chamber 16 connected to it prevented. Even with more complicated ones Configuration of the mold cavity 14 can residual gases also from angled Areas of the mold cavity 14 are removed by the suction speed preferably selected in a range from 500 to 800 mbar / sec becomes.
  • the evacuation is advantageously maintained for 1 to 2 seconds, the filling opening 18 of course closed with the piston 24 is.
  • the evacuation time is in the inventive Procedure a little longer.
  • a vacuum of preferably less than 100 mbar generated. Water vapor originating from release agents and to the inner Surfaces of the die 12 sticks, evaporates from this surface and is led out of the mold cavity 14.
  • Evacuating the mold cavity 14 leads to more effective removal of water vapor as the mere flooding of the mold cavity 14 with Oxygen because of a gas flow in the mold cavity 14 at a higher speed flows.
  • the mold cavity 14 is under insufficient vacuum is evacuated above about 100 mbar, there remains a proportionate large amount of residual gas in the mold cavity 14. A large part of this in the mold cavity 14 remaining residual gas is used in the subsequent flooding Oxygen is not replaced by oxygen, but often remains as an inclusion in the die-cast part.
  • oxygen is injected into the mold cavity via the nozzle 34 14 out.
  • the oxygen supply is preferably maintained for 3 to 4 seconds. until the gases and oxygen through the two mold halves of the Die casting molds 12 escape from the mold cavity 14.
  • the oxygen flows into the previously evacuated mold cavity 14, the oxygen flows as a high-speed current in every constriction of the Mold cavity 14 so that water vapor originating from the release agent is largely washed out by the oxygen supply.
  • the piston 24 moves back to the opening of the fill opening 18, with the supply of oxygen continues. As soon as the fill opening 18 is opened, penetrates the oxygen also exits through the fill opening 18, as shown in FIG. 2. The Leakage of oxygen effectively prevents air and air from entering Water vapor through the inlet opening 18 into the filling chamber 16.
  • liquid metal 20 is introduced into the filling chamber 16 filled. Because during the filling process the oxygen is continuous emerges from the filling opening 18, the supply of air and water vapor prevented in the filling chamber 16 during filling with liquid metal 20.
  • the die-casting mold 12 is used for filling the liquid metal 20 Reduce thermal shock and improve productivity preferably preheated to a temperature of about 150 to 200 ° C.
  • the piston rod 22 moved forward with the piston 24 and the liquid metal 20 in the Mold cavity 14 shot.
  • the metal mass filling the mold cavity 14 is cooled and solidifies into a mold cavity designed die-cast part.
  • the liquid metal 20 is filled in the filling chamber 16 and subsequently the filling opening 18 are closed with the piston 24. Subsequently All three steps are pre-evacuation, oxygen flooding and re-evacuation one after the other during the first filling phase of the die casting process, i.e. until the liquid metal enters the mold cavity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP99810195A 1999-03-05 1999-03-05 Procédé pour la coulée sous pression de métaux légers Withdrawn EP1034863A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP99810195A EP1034863A1 (fr) 1999-03-05 1999-03-05 Procédé pour la coulée sous pression de métaux légers
US09/501,696 US6308766B1 (en) 1999-03-05 2000-02-10 Process for die-casting light-weight metals
CA002299078A CA2299078A1 (fr) 1999-03-05 2000-02-22 Procede de moulage sous pression de metaux legers
BR0000718-8A BR0000718A (pt) 1999-03-05 2000-03-02 Processo para fundição em matriz de metais leves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99810195A EP1034863A1 (fr) 1999-03-05 1999-03-05 Procédé pour la coulée sous pression de métaux légers

Publications (1)

Publication Number Publication Date
EP1034863A1 true EP1034863A1 (fr) 2000-09-13

Family

ID=8242713

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99810195A Withdrawn EP1034863A1 (fr) 1999-03-05 1999-03-05 Procédé pour la coulée sous pression de métaux légers

Country Status (4)

Country Link
US (1) US6308766B1 (fr)
EP (1) EP1034863A1 (fr)
BR (1) BR0000718A (fr)
CA (1) CA2299078A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001051237A1 (fr) * 2000-01-12 2001-07-19 Nippon Light Metal Co., Ltd. Procede de coulee sous pression et machine de coulee sous pression
CN105414515A (zh) * 2015-11-26 2016-03-23 广东鸿图科技股份有限公司 一种卧式冷室真空压铸机的压铸机构及利用其进行压铸的方法
CN106077567A (zh) * 2016-08-10 2016-11-09 江苏金润汽车传动科技有限公司 液压阀板铸造用抽真空充氧模具装置
WO2021144197A1 (fr) * 2020-01-14 2021-07-22 Audi Ag Procédé de fabrication d'une jante de véhicule automobile en aluminium ou en alliage d'aluminium pour une roue d'un véhicule automobile et jante de véhicule automobile correspondante

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10207028B4 (de) * 2001-02-20 2008-07-24 Toshiba Kikai K.K. Spritzgießmaschine
JP2006183122A (ja) * 2004-12-28 2006-07-13 Denso Corp ダイカスト用アルミニウム合金およびアルミニウム合金鋳物の製造方法
JP4442598B2 (ja) * 2006-10-12 2010-03-31 トヨタ自動車株式会社 減圧鋳造方法、及び、減圧鋳造装置
JP5587615B2 (ja) * 2010-01-18 2014-09-10 本田技研工業株式会社 鋳造方法
JP5770012B2 (ja) * 2010-11-24 2015-08-26 東芝機械株式会社 品質管理装置及びダイカストマシン
JP5779411B2 (ja) * 2011-06-08 2015-09-16 本田技研工業株式会社 無孔性ダイカスト用金型装置
JP2014151351A (ja) * 2013-02-08 2014-08-25 Direct 21 Corp ダイカスト装置
JP6170820B2 (ja) * 2013-11-26 2017-07-26 ヤマハモーター精密部品製造株式会社 反応性ガス供給装置、無孔性ダイカストシステムおよび無孔性ダイカスト製品の製造方法
KR20210054328A (ko) * 2019-11-05 2021-05-13 현대자동차주식회사 진공 고압주조 방법 및 진공 고압주조용 금형 장치
WO2021117050A1 (fr) * 2020-02-28 2021-06-17 Patwardhan Mangesh Ensemble injecteur de coulée sous pression comprenant un mécanisme de liaison

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382910A (en) * 1966-06-30 1968-05-14 Int Lead Zinc Res Pore-free die casting
JPS558382A (en) * 1978-07-05 1980-01-21 Kawasaki Heavy Ind Ltd Diecast method
JPS583766A (ja) * 1981-06-27 1983-01-10 Fuso Light Alloys Co Ltd ダイカスト法
SU1134289A1 (ru) * 1983-05-13 1985-01-15 Предприятие П/Я Г-4205 Способ лить под давлением

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5021145B1 (fr) * 1970-08-18 1975-07-21
US4431047A (en) * 1979-09-27 1984-02-14 Ube Industries, Ltd. Gas-venting arrangement incorporated with a mold
DE3002886A1 (de) * 1980-01-28 1981-07-30 Bayrisches Druckguß-Werk Thurner KG, 8015 Markt Schwaben Druckgiessmaschine und verfahren zum betrieb derselben
US5076344A (en) * 1989-03-07 1991-12-31 Aluminum Company Of America Die-casting process and equipment
EP0759825B1 (fr) * 1995-03-20 1999-08-18 Alusuisse Bayrisches Druckguss-Werk GmbH & Co. KG Procede de fabrication de pieces coulees sous pression
JP3508627B2 (ja) * 1998-07-14 2004-03-22 日本軽金属株式会社 ダイカスト法及びダイカスト製品

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382910A (en) * 1966-06-30 1968-05-14 Int Lead Zinc Res Pore-free die casting
JPS558382A (en) * 1978-07-05 1980-01-21 Kawasaki Heavy Ind Ltd Diecast method
JPS583766A (ja) * 1981-06-27 1983-01-10 Fuso Light Alloys Co Ltd ダイカスト法
SU1134289A1 (ru) * 1983-05-13 1985-01-15 Предприятие П/Я Г-4205 Способ лить под давлением

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 8532, Derwent World Patents Index; Class M22, AN 85-195087, XP002110421 *
PATENT ABSTRACTS OF JAPAN vol. 004, no. 033 (M - 003) 21 March 1980 (1980-03-21) *
PATENT ABSTRACTS OF JAPAN vol. 007, no. 074 (M - 203) 26 March 1983 (1983-03-26) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001051237A1 (fr) * 2000-01-12 2001-07-19 Nippon Light Metal Co., Ltd. Procede de coulee sous pression et machine de coulee sous pression
US6648054B2 (en) 2000-01-12 2003-11-18 Nippon Light Metal Co., Ltd. Die casting method and die casting machine
CN1296160C (zh) * 2000-01-12 2007-01-24 日本轻金属株式会社 模铸机
CN105414515A (zh) * 2015-11-26 2016-03-23 广东鸿图科技股份有限公司 一种卧式冷室真空压铸机的压铸机构及利用其进行压铸的方法
CN106077567A (zh) * 2016-08-10 2016-11-09 江苏金润汽车传动科技有限公司 液压阀板铸造用抽真空充氧模具装置
WO2021144197A1 (fr) * 2020-01-14 2021-07-22 Audi Ag Procédé de fabrication d'une jante de véhicule automobile en aluminium ou en alliage d'aluminium pour une roue d'un véhicule automobile et jante de véhicule automobile correspondante

Also Published As

Publication number Publication date
CA2299078A1 (fr) 2000-09-05
US6308766B1 (en) 2001-10-30
BR0000718A (pt) 2001-01-16

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