EP0051310B1 - Druckgiessmaschine - Google Patents

Druckgiessmaschine Download PDF

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Publication number
EP0051310B1
EP0051310B1 EP81109420A EP81109420A EP0051310B1 EP 0051310 B1 EP0051310 B1 EP 0051310B1 EP 81109420 A EP81109420 A EP 81109420A EP 81109420 A EP81109420 A EP 81109420A EP 0051310 B1 EP0051310 B1 EP 0051310B1
Authority
EP
European Patent Office
Prior art keywords
vacuum
die casting
casting machine
machine according
suction pipe
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.)
Expired
Application number
EP81109420A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0051310A1 (de
Inventor
Edgar Dr.-Ing. Lossack
Jochen Dr. Ing. Spriestersbach
Josef Bauer
Wilfried Schwab
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.)
Maschinenfabrik Mueller Weingarten AG
Vereinigte Aluminium Werke AG
Original Assignee
Maschinenfabrik Mueller Weingarten AG
Vereinigte Aluminium Werke AG
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 Maschinenfabrik Mueller Weingarten AG, Vereinigte Aluminium Werke AG filed Critical Maschinenfabrik Mueller Weingarten AG
Priority to AT81109420T priority Critical patent/ATE11381T1/de
Publication of EP0051310A1 publication Critical patent/EP0051310A1/de
Application granted granted Critical
Publication of EP0051310B1 publication Critical patent/EP0051310B1/de
Expired 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 die casting machine for producing low-gas, low-pore and low-oxide castings, in particular castings of approximately 1 to 3 kg shot weight made of metals or their alloys, with a mold provided with a vacuum connection and a holding device for the melt, the Warming device is connected to the filling chamber via a suction pipe provided with a nozzle, in which a casting piston attached to a piston rod is provided for pressing the melt into the mold and the filling chamber is acted upon by vacuum from a further vacuum connection (DE-A-2 641 116) .
  • die casting machines were used in which a displacement gas, preferably oxygen, was introduced into the filling chamber and into the mold cavity, thereby displacing the air.
  • the liquid aluminum is then poured into the filling chamber and, by swirling the liquid aluminum with the oxygen, a reaction to aluminum oxide particles is produced, which are then distributed as solid particles in the casting.
  • a displacement gas preferably oxygen
  • the liquid aluminum is then poured into the filling chamber and, by swirling the liquid aluminum with the oxygen, a reaction to aluminum oxide particles is produced, which are then distributed as solid particles in the casting.
  • only mineral oil-free lubricants can be used, since there is otherwise a risk of explosion during the filling phase. This results in difficulties in the distribution of the lubricant, since inorganic, solid lubricants can preferably be used. If the mold filling speed is inadequate, fluctuations in the oxide distribution can also occur which impair the quality of the casting. ;
  • die casting machines In order to achieve an increased casting output, die casting machines have also been developed in which the molten metal is drawn into the filling chamber by means of a vacuum via a suction pipe (DE-A-1 458 151). A sufficient vacuum must be present during the mold filling phase and the dosing phase in order to suck in the hydrogen content of the melt and the air present in the mold cavity and in the filling chamber, as well as the casting gases generated during contact with the liquid aluminum.
  • the use of such die casting machines was aimed at reducing the oxide content in the castings.
  • DE-A-2 641 116 shows in Fig. 1 a die casting machine according to the preamble of claim 1, in which the mold via a vacuum line and the filling chamber via a near the piston end (in its retracted position), with the Vacuum line connected opening can be applied to vacuum.
  • the vacuum is introduced into the filling chamber at the same location where the molten metal also enters.
  • the vacuum line is terminated, so that during the subsequent further mold filling phase, the aforementioned difficulties in removing the gas contents and impurities still present in the melt occur .
  • the object is to develop a die casting machine with which, with particularly high productivity, castings of an excellent quality can be produced, which can be subsequently tempered at high temperature and whose content of metal oxides is particularly low .
  • a bore is made on the piston rod up to the region of the casting piston and ends there in an annular channel of the casting piston. This ensures that the vacuum can remain applied to the filling chamber to the full extent even until the mold filling phase is completed, as a result of which particularly good degassing of the melt can be achieved, which leads to castings of such quality that they are thermally annealed at temperatures can be subjected, as they are required in solution annealing of aluminum materials.
  • the castings produced with the die casting machine according to the invention have particularly good mechanical properties and can also be subjected to surface finishing without difficulty, so that nothing stands in the way of decorative or functional surface finishing such as anodizing, PTFE and enamel coating.
  • An advantageous embodiment of the die casting machine according to the invention is that the further vacuum connection is provided with a vacuum valve and this can be controlled even before the two mold halves meet. In this way it can be avoided that a jerky backflow occurs within the filling chamber and thus within the suction pipe during the form-fitting process, which could have a disadvantageous effect in the melt.
  • an interchangeable throttle is provided to adjust the speed of the molten metal during the transition from the warming device into the intake manifold, the interchangeable throttle preferably being arranged in the lower end region of the intake manifold and made from a wear-resistant, refractory material is and preferably has a diameter of 4 to 8 mm in cross section.
  • This exchangeable throttle not only gives the possibility of an exact metal dosing, but it also gives the possibility to extend the duration of action of the vacuum on the liquid aluminum melt as long as possible.
  • filter material can also be advantageously arranged in the intake manifold.
  • a further advantageous embodiment of the die casting machine according to the invention also consists in the suction pipe being equipped with a heating device which is preferably designed as induction heating or gas heating and which is effective up to the upper connection region of the suction pipe.
  • a heating device which is preferably designed as induction heating or gas heating and which is effective up to the upper connection region of the suction pipe.
  • Such a heating device guarantees a perfect flow of the molten metal through the suction pipe and prevents so-called "freezing" of the suction pipe even with a longer product time.
  • the viscosity of the molten metal can be influenced favorably by the heating device after it has left the holding furnace.
  • the warming device is arranged below the filling chamber between a fixed platen and the drive for the casting piston.
  • the invention further relates to a control unit for regulating the vacuum in a die casting machine according to the invention, this control unit being characterized in that the vacuum build-up in the entire system is monitored by means of a vacuum measuring device with adjustable switching points and the suction quantity is controlled accordingly via a control valve.
  • the vacuum build-up can be preselected according to the requirements of the application, and the inflow speed of the metal to the casting chamber can thus be influenced favorably.
  • Fig. 1 only the area of the fixed platen 31 with a fixed mold half 14 and a movable mold half 16 is shown essentially from a die casting machine.
  • the valve for the vacuum connection for the mold is indicated by »17 «.
  • FIG. 3 For example a pan, the gate area being designated by “28” and the two vacuum connections being designated by “29” and “30”.
  • a casting run 18 is also provided.
  • a connection 11 for the piston lubrication ends.
  • a conical extension 4a is also attached, as a result of which the metal entering the filling chamber 10 from the suction pipe 6 is deflected to the longitudinal axis of the chamber, and turbulence can thereby be avoided.
  • the rear area 10a of the filling chamber 10 is lined with a heat-resistant seal 3.
  • the suction pipe 6 is suspended by means of a clamp 22 which engages with a lower hook-shaped nose 24 under an annular flange 25 of the suction pipe 6.
  • a spring pin 1 is guided through the clamp 22 from above, resulting in an elastic bracing of the conical end 6b within the corresponding conical connection on the filling chamber 10.
  • An insulating liner 23 is provided in the intake manifold 6, which is chemically inert and is less wettable against aluminum alloys.
  • the holding oven 9 is adjustable in height, which, for the sake of simplicity, is not shown separately. In this way, a desired immersion depth of the suction pipe 6 in the molten metal can always be ensured.
  • the holding furnace 9 can also be lowered and extended laterally to facilitate removal or replacement of the suction tube 6.
  • Fig. 2 the piston rod 21 is shown with the casting piston 4 as a detail; it has a bore 27 of a piston cooling device known per se.
  • the actual suction channel 20 for the vacuum is passed through the piston rod 21 and ends with the end region 20a in an annular channel 26. This ensures that the vacuum on the casting piston 4 can be maintained even while the casting piston 4 is moving forward.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Confectionery (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Measuring Fluid Pressure (AREA)
  • Dental Prosthetics (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP81109420A 1980-11-03 1981-10-30 Druckgiessmaschine Expired EP0051310B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81109420T ATE11381T1 (de) 1980-11-03 1981-10-30 Druckgiessmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803041340 DE3041340A1 (de) 1980-11-03 1980-11-03 Druckgiessverfahren zur herstellung von gasarmer, porenarmer und oxydarmer gussstuecke sowie druckgiessmaschine zur durchfuehrung des verfahrens
DE3041340 1980-11-03

Publications (2)

Publication Number Publication Date
EP0051310A1 EP0051310A1 (de) 1982-05-12
EP0051310B1 true EP0051310B1 (de) 1985-01-23

Family

ID=6115827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109420A Expired EP0051310B1 (de) 1980-11-03 1981-10-30 Druckgiessmaschine

Country Status (6)

Country Link
US (1) US4476911A (enrdf_load_stackoverflow)
EP (1) EP0051310B1 (enrdf_load_stackoverflow)
JP (2) JPS57152361A (enrdf_load_stackoverflow)
AT (1) ATE11381T1 (enrdf_load_stackoverflow)
DE (2) DE3041340A1 (enrdf_load_stackoverflow)
NO (1) NO157129C (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0285688A1 (de) * 1987-04-07 1988-10-12 Maschinenfabrik Müller-Weingarten AG Saugrohrheizung für das Saugrohr bei einer Vakuum-Druckgiessmaschine
EP0285686A1 (de) * 1987-04-07 1988-10-12 Maschinenfabrik Müller-Weingarten AG Saugrohr für Vakuum-Druckgiessmaschine
EP0496219A1 (de) * 1991-01-21 1992-07-29 Maschinenfabrik Müller-Weingarten AG Druckgiessmaschine
DE4239558A1 (de) * 1992-11-25 1994-05-26 Mueller Weingarten Maschf Verfahren zur Unterdruck-Herstellung bei einer Druckgießmaschine
DE19503784A1 (de) * 1995-02-04 1996-08-08 Schaeffler Waelzlager Kg Verfahren zum Herstellen eines Kipp- oder Schlepphebels aus Aluminium
EP0790090A2 (de) 1996-02-16 1997-08-20 Müller-Weingarten AG Vakuum-Druckgiessmachine
US6379609B1 (en) 1999-08-30 2002-04-30 Muller Weingarten Ag Process for controlling the amount of metal metered
DE10054870B4 (de) * 2000-11-06 2008-04-24 Bühler Druckguss AG Druckgiessmaschine

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59144566A (ja) * 1983-02-08 1984-08-18 Ube Ind Ltd 真空鋳造装置
DE3401715C2 (de) * 1984-01-19 1986-02-27 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Druckgiessverfahren zur Herstellung gasarmer, porenarmer und oxydarmer Gußstücke
JPS62156059A (ja) * 1985-11-26 1987-07-11 Akio Nakano ホツトチヤンバ型ダイカスト装置
US5076344A (en) * 1989-03-07 1991-12-31 Aluminum Company Of America Die-casting process and equipment
ATE229090T1 (de) * 1989-03-07 2002-12-15 Aluminum Co Of America Aluminiumlegierungsgussstück
US5211216A (en) * 1991-09-23 1993-05-18 Gibbs Die Casting Aluminum Corporation Casting process
US5263531A (en) * 1991-09-23 1993-11-23 Gibbs Die Casting Aluminum Corporation Casting process using low melting point core material
DE19850499C1 (de) * 1998-11-02 2000-04-13 Friedrich Wieser Verfahren und Vorrichtung zum Druck- oder Spritzgießen
DE19921496A1 (de) 1999-05-08 2000-11-09 Mueller Weingarten Maschf Kolbenseitige Absaugabdichtung bei Anwendung des Vakuumdruckgießverfahren
JP3734155B2 (ja) * 2000-10-25 2006-01-11 日本軽金属株式会社 ダイカスト用アルミニウム合金、アルミニウムダイカスト製品およびその製造方法
JP4402007B2 (ja) * 2004-06-24 2010-01-20 有限会社藤野技術コンサルタント ダイカスト鋳造装置及びダイカスト鋳造方法
DE102004057324A1 (de) 2004-11-27 2006-06-01 Pfeiffer Vacuum Gmbh Vakuumdruckgussverfahren
EP1844174A4 (en) * 2004-12-23 2008-03-05 Commw Scient Ind Res Org Heat treatment of aluminium alloy high pressure die castings
DE102007060418B4 (de) 2007-12-14 2010-11-11 Martin Baumann Verfahren und Vorrichtung zum Vakuum-Druckgießen zur Herstellung von porenarmen und warmbehandelbaren Gussteilen
DE202010006752U1 (de) 2010-05-12 2010-08-12 Ge Com Garlin Engeneering & Composite Gmbh Gießkammerabdichtung bei einer Druckgießmaschine
WO2012100789A1 (de) * 2011-01-28 2012-08-02 Idra S.R.L. Vakuum-druckgiessmaschine
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
JP5987674B2 (ja) 2012-12-19 2016-09-07 マツダ株式会社 鋳造装置および鋳造方法
CN104259448A (zh) * 2014-10-14 2015-01-07 重庆大学 一种镁合金铸造方法及装置
CN106670441B (zh) * 2016-12-30 2017-11-14 北京航空航天大学 一种可实现金属熔体真空定量浇注的设备与方法
DE102019107325A1 (de) * 2019-03-21 2020-09-24 Engel Austria Gmbh Aufschmelzeinheit für eine Formgebungsmaschine und Formgebungsmaschine mit einer solchen
JP7254619B2 (ja) * 2019-05-17 2023-04-10 芝浦機械株式会社 ダイカストマシン
JP7254618B2 (ja) 2019-05-17 2023-04-10 芝浦機械株式会社 ダイカストマシン
CN113263163A (zh) * 2021-04-28 2021-08-17 深圳大学 一种高效消除固体表面吸附气体的方法及其应用
CN114346217B (zh) * 2021-12-22 2024-06-04 中山市奥博精密科技有限公司 一种金属铸件及其制备方法和应用
EP4219043A1 (en) 2022-01-26 2023-08-02 Fundación Azterlan Vacuum pressure process and apparatus for high pressure die casting
DE102023100621A1 (de) 2023-01-12 2024-07-18 Thomas Ninkel Vorrichtung zum Schmelze-Dosieren an einer Druckgießmaschine
DE102023100620B4 (de) 2023-01-12 2024-08-22 Thomas Ninkel Vorrichtung zum Vakuum-Druckgießen und Druckgießmaschine
CN116550947A (zh) * 2023-04-23 2023-08-08 北京科技大学 一种用于提高负压连铸纯化率和稳定性的装置及方法
CN119549679A (zh) 2023-09-01 2025-03-04 通用汽车环球科技运作有限责任公司 减少高压压铸零件中冰晶的方法

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391182A (en) * 1942-01-26 1945-12-18 Charles C Misfeldt Method for pressure molding
CH313426A (fr) * 1953-08-10 1956-04-15 Hodler Fritz Procédé de fonte sous pression d'objets en métal et machine à injecter pernettant la mise en oeuvre du procédé
US2864140A (en) * 1955-10-31 1958-12-16 Package Machinery Co Vacuum die casting means
US2904861A (en) * 1957-05-31 1959-09-22 Package Machinery Co Apparatus for and method of die casting under vacuum
GB834723A (en) * 1957-11-22 1960-05-11 Sparklets Ltd Apparatus for die casting and moulding
US3019495A (en) * 1958-05-28 1962-02-06 Litemetal Dicast Inc Die casting
US3009218A (en) * 1958-10-22 1961-11-21 David M Morgenstern Apparatus for vacuum feeding a die casting machine
FR1283857A (fr) * 1960-11-09 1962-02-09 Fries Sohn J S Installation de vide pour machines à mouler
NL288985A (enrdf_load_stackoverflow) * 1962-02-14
DE1458151A1 (de) * 1963-11-04 1969-01-30 Morton Glenn Raymond Spritzgussmaschine
US3283372A (en) * 1964-02-28 1966-11-08 Aluminum Co Of America Vacuum die casting apparatus
JPS4021291Y1 (enrdf_load_stackoverflow) * 1965-01-16 1965-07-23
DE1483608C3 (de) * 1965-10-04 1979-02-22 Glenn Raymond Omaha Nebr. Morton (V.St.A.) Druckgießmaschine
US4146081A (en) * 1976-08-14 1979-03-27 Walter Reis Apparatus for die casting
DE2641116A1 (de) * 1976-09-13 1978-03-30 Walter Reis Vorrichtung zum druckgiessen von metallen, z.b. aluminium, unter evakuierung der druckgiessformen
CH635255A5 (de) * 1978-07-19 1983-03-31 Buehler Ag Geb Druckgiessmaschine.
US4334575A (en) * 1980-03-18 1982-06-15 Nippon Light Metal Co., Ltd. Method for cooling a plunger tip in a die casting machine of the cold chamber type and apparatus therefor
US4420028A (en) * 1980-10-29 1983-12-13 Outboard Marine Corporation Lubrication system for a die casting machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0285688A1 (de) * 1987-04-07 1988-10-12 Maschinenfabrik Müller-Weingarten AG Saugrohrheizung für das Saugrohr bei einer Vakuum-Druckgiessmaschine
EP0285686A1 (de) * 1987-04-07 1988-10-12 Maschinenfabrik Müller-Weingarten AG Saugrohr für Vakuum-Druckgiessmaschine
EP0496219A1 (de) * 1991-01-21 1992-07-29 Maschinenfabrik Müller-Weingarten AG Druckgiessmaschine
US5201358A (en) * 1991-01-21 1993-04-13 Maschinenfabrik Muller-Weingarten Ag Die-casting machine
DE4239558A1 (de) * 1992-11-25 1994-05-26 Mueller Weingarten Maschf Verfahren zur Unterdruck-Herstellung bei einer Druckgießmaschine
DE19503784A1 (de) * 1995-02-04 1996-08-08 Schaeffler Waelzlager Kg Verfahren zum Herstellen eines Kipp- oder Schlepphebels aus Aluminium
EP0790090A2 (de) 1996-02-16 1997-08-20 Müller-Weingarten AG Vakuum-Druckgiessmachine
US6379609B1 (en) 1999-08-30 2002-04-30 Muller Weingarten Ag Process for controlling the amount of metal metered
DE10054870B4 (de) * 2000-11-06 2008-04-24 Bühler Druckguss AG Druckgiessmaschine

Also Published As

Publication number Publication date
ATE11381T1 (de) 1985-02-15
US4476911A (en) 1984-10-16
DE3168537D1 (en) 1985-03-07
NO157129B (no) 1987-10-19
EP0051310A1 (de) 1982-05-12
JPS57152361A (en) 1982-09-20
NO157129C (no) 1988-01-27
JPH0337812Y2 (enrdf_load_stackoverflow) 1991-08-09
DE3041340C2 (enrdf_load_stackoverflow) 1987-06-25
NO813701L (no) 1982-05-04
DE3041340A1 (de) 1982-05-13
JPS61117351U (enrdf_load_stackoverflow) 1986-07-24

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