EP0600324A1 - Procédé pour l'obtention de pression réduite dans une machine à couler sous préssion - Google Patents

Procédé pour l'obtention de pression réduite dans une machine à couler sous préssion Download PDF

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Publication number
EP0600324A1
EP0600324A1 EP93118695A EP93118695A EP0600324A1 EP 0600324 A1 EP0600324 A1 EP 0600324A1 EP 93118695 A EP93118695 A EP 93118695A EP 93118695 A EP93118695 A EP 93118695A EP 0600324 A1 EP0600324 A1 EP 0600324A1
Authority
EP
European Patent Office
Prior art keywords
vacuum
casting
negative pressure
casting chamber
pressure
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.)
Granted
Application number
EP93118695A
Other languages
German (de)
English (en)
Other versions
EP0600324B1 (fr
Inventor
Friedrich Dr.-Ing. Stummer
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.)
Mueller Weingarten AG
Original Assignee
Maschinenfabrik Mueller Weingarten AG
Mueller Weingarten 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, Mueller Weingarten AG filed Critical Maschinenfabrik Mueller Weingarten AG
Publication of EP0600324A1 publication Critical patent/EP0600324A1/fr
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Publication of EP0600324B1 publication Critical patent/EP0600324B1/fr
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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
    • B22D17/145—Venting means therefor
    • 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
    • B22D17/20—Accessories: Details
    • B22D17/32—Controlling equipment

Definitions

  • the invention relates to a method for producing the negative pressure in a die casting machine, in particular a vacuum die casting machine according to the preamble of claim 1.
  • the negative pressure (vacuum) applied to the casting mold can be effective until the casting mold is filled with liquid metal by the advancing movement of the casting piston, a valve with a hydraulically actuated blocking piston being located on the casting mold and preventing the metal melt from penetrating into the Suction channel prevented.
  • the method according to the invention with the characterizing features of claim 1 aims and achieves a considerable improvement in the evacuation of the air, in particular in the known vacuum pressure casting method.
  • the method can also be used in the normal pressure casting process for evacuating the air.
  • the invention is based on the main idea that the vacuum applied not only in terms of its size, i. H. with regard to the negative pressure produced and with regard to the duty cycle, but the vacuum can moreover be precisely adapted to the respective conditions of the die casting process.
  • This is done according to the invention by regulating the vacuum over the period of time of the application of negative pressure, ie. H.
  • the size and duration of the vacuum applied is subjected to the most precise control.
  • the inlet of the melt through the suction pipe into the casting chamber and into the casting mold can be regulated at any time, so that - if necessary in conjunction with further auxiliary measures - an optimal filling of both the casting chamber and an optimal casting process can be achieved during the casting process itself .
  • Turbulence in the metal flow can also be avoided. Basically, an optimal degassing of the metal is achieved. Through continuous regulation or control of the absolute pressure of the vacuum during the casting process, considerable improvements in the die-cast products are achieved. According to the invention, a precise regulation of the vacuum with regard to an undesired premature entry of the molten metal into the mold cavity during the filling of the casting chamber is in particular avoided, which leads to undesirable flow marks on the casting.
  • the invention is described using a vacuum die casting machine. It can also be used for the "evacuation" of normal die casting machines if the casting piston has closed the filling opening.
  • Fig. 1 the fixed platen 2 is shown with a fixed mold half 3, which cooperates with the movable mold half 4 of a die casting machine 1 only indicated.
  • the mold cavity 5, which is to be filled with molten metal, is located between the fixed 3 and the movable mold half 4.
  • a casting chamber 6 with a casting piston 7 is provided, into which the molten metal 8 is drawn in from a holding device 10 via a suction pipe 9.
  • the molten metal is not sucked out of the holding device 10 by a casting process, but rather by applying a vacuum or negative pressure.
  • the suction process takes place through the suction pipe 9 via the casting chamber 6 and the mold cavity 5.
  • a vacuum valve 11 with a vacuum connection line 12 on the mold halves 3, 4, which leads to a switching valve 13.
  • the vacuum line 12 is continued from the switching valve 13 to a vacuum tank 14, to which a vacuum pump 15 is connected to produce the negative pressure.
  • the vacuum valve 11 of the casting mold serves to shut off the metal melt, which may be pressed in up to this location by means of the casting piston 7. Penetration of the metal into the subsequent vacuum connection line 12 is thus avoided.
  • the vacuum applied via the vacuum valve 11 is regulated via the switching valve 13 in its pressure profile such that the pressure in the mold cavity 5, in the casting chamber 6 and in the suction pipe 9 is regulated according to a certain adjustable function per unit of time.
  • a computer 16 is provided, which records a wide variety of parameters.
  • the negative pressure in the area of the vacuum valve 11 is detected via an additional measuring line 17 and measured by means of a vacuum measuring probe.
  • This vacuum measuring probe 18 is connected to the vacuum connecting line 12 via an additional shunt valve 19.
  • the pressure p in the vacuum connecting line 12 can thus be detected and fed to the computer 16 via the line 20.
  • the vacuum pressure in the system can also be supplied to the computer 16 via other measuring lines in the system. This is indicated, for example, by a measuring line 21 to the vacuum tank 14.
  • the pressure curve or mass flow curve set over time can be a progressive, take a linear or degressive course.
  • the switching valve 13 in the vacuum connecting line is controlled via the computer 16, for example via the control line 22, in such a way that the desired pressure profile or mass flow profile is established in the vacuum line 12.
  • the computer 16 can control the vacuum valve 11 via a control line 23 and control the shunt valve 19 via a further control line 24.
  • the production of the vacuum itself ie the operation of the vacuum pump 15, can also take place via a further control line 25.
  • the melt 8 is absolutely sucked out of the warming device 10 via a throttle 30 located at the lower end of the suction pipe 9 into the casting chamber 6 by applying a high negative pressure of the order of p1 ⁇ 150 to 200 mbar.
  • the size of the throttle 30, the intake time t 1 and the negative pressure p 1 determines the amount m 1 of the molten metal that is sucked into the casting chamber.
  • An additional sensor z. B. an ultrasonic sensor 28 in the upper wall of the casting chamber or a resistance sensor 28 'in the sprue cross section of the mold half 4 can detect the fill level h 1 in the casting chamber 6 and supply this value via a measuring line 29 to the computer 16 for evaluation.
  • the suction process in vacuum pressure casting machines can be ended as the first control section by passing over the casting piston 7 via the suction or inlet opening 27 into the casting chamber 6 or by a correspondingly reduced negative pressure (pressure increase). It corresponds to the process of filling molten metal into a "normal" Die casting device.
  • the position of the casting piston 7 can be fed to the computer 16 via a line 32 via a travel detection sensor 31, in order to detect the piston position after passing over the filling opening 27 and to regulate the vacuum, particularly in "normal” casting chambers.
  • Sensors for detecting the path or the fill level are known per se (see, e.g., Maschinen mod 1992, 40, pages 72-77).
  • This first filling period t 1 is followed by a further "holding period” t 2.
  • a certain holding time of the vacuum of t2 ⁇ 0.2 to 3 seconds is set over a period of time t2 after a continuous drop in the vacuum (pressure increase) to a vacuum of preferably p2 ⁇ 800 mbar absolute.
  • This holding time can be measured depending on the specific metal weight, the suction pipe height h2 or the fill level h1 in the casting chamber and the shape of the mold.
  • the invention further provides that in the first output phase t1 when the melt 8 passes from the suction pipe 9 into the casting chamber 6 at the inlet opening 27 of the casting chamber, a constant melt speed v ⁇ 1 m / sec can be set due to the controllable low pressure, flow values preferably on the order of less than 1 m / sec.
  • the casting piston 7 is provided in its lower region with a deflection surface 26, as is the case in the applicant's prior publication according to DE 41 01 592 is described.
  • the casting mold is filled in a manner known per se by the displacement of the piston 7 in the casting chamber 6 in a pre-filling and mold-filling phase.
  • the regulation of the negative pressure over this third time period t 3 serves to extract the remaining air or gas components.
  • the invention is not restricted to the exemplary embodiment shown and described. Rather, it also includes all professional developments and additions within the framework of the inventive concept.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP93118695A 1992-11-25 1993-11-20 Procédé pour l'obtention de pression réduite dans une machine à couler sous préssion Expired - Lifetime EP0600324B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4239558 1992-11-25
DE4239558A DE4239558A1 (de) 1992-11-25 1992-11-25 Verfahren zur Unterdruck-Herstellung bei einer Druckgießmaschine

Publications (2)

Publication Number Publication Date
EP0600324A1 true EP0600324A1 (fr) 1994-06-08
EP0600324B1 EP0600324B1 (fr) 1999-06-16

Family

ID=6473581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93118695A Expired - Lifetime EP0600324B1 (fr) 1992-11-25 1993-11-20 Procédé pour l'obtention de pression réduite dans une machine à couler sous préssion

Country Status (3)

Country Link
EP (1) EP0600324B1 (fr)
DE (2) DE4239558A1 (fr)
ES (1) ES2134820T3 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19628870A1 (de) * 1996-07-17 1998-01-22 Alusuisse Bayrisches Druckgus Vorrichtung und Verfahren zur Herstellung von Druckgußteilen
EP1080809A1 (fr) * 1999-08-30 2001-03-07 Müller Weingarten AG Méthode pour contrôler la distribution de quantité de métal liquide
DE10140657C1 (de) * 2001-08-24 2002-11-07 Mueller Weingarten Maschf Messung des Druckes in einer Form während des Füllvorgangs
EP1524048A1 (fr) * 2003-10-15 2005-04-20 Fondarex S.A. Appareil de moulage sous presssion ou par injection ainsi que actionneur et unité de compression et de contrôle associé
US6948549B2 (en) 2001-09-12 2005-09-27 Alcan Bdw Gmbh & Co. Kg Method for controlling a vacuum valve of a vacuum die casting device and a vacuum die casting device
EP1832362A1 (fr) * 2006-03-06 2007-09-12 Pfeiffer Vacuum Gmbh Installation de coulée sous pression à vide et son procédé de fonctionnement
JP2013022621A (ja) * 2011-07-21 2013-02-04 Honda Motor Co Ltd 溶湯の供給方法及びその装置
DE102014113570B3 (de) * 2014-09-19 2015-12-24 Ksm Castings Group Gmbh Einrichtung zur Messung von Drücken in einem mit Schmelze füllbaren Formhohlraum einer Gießform, insbesondere einer Vakuumdruckgussform
CN107335789A (zh) * 2017-08-30 2017-11-10 鞍山海望真空系统有限公司 双独立系统压铸高真空装置
DE102016221674A1 (de) 2016-11-04 2018-05-09 Magna BDW technologies GmbH Steuerung für eine Vorrichtung zur Herstellung von Druckgussteilen
DE102016221678A1 (de) 2016-11-04 2018-05-09 Magna BDW technologies GmbH Vorrichtung zur Herstellung von Druckgussteilen
WO2018082939A2 (fr) 2016-11-04 2018-05-11 Magna BDW technologies GmbH Dispositif, commande et module de filtre permettant de produire des pièces moulées sous pression, ainsi que procédé associé
CN110076313A (zh) * 2019-05-05 2019-08-02 广东鸿图武汉压铸有限公司 一种基于真空排气和自然排气一体化的压铸模具

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59703386D1 (de) * 1996-09-05 2001-05-23 Electronics Gmbh Druckgiessvorrichtung und Druckgiessverfahren
DE19930624A1 (de) * 1999-07-02 2001-01-11 Geesthacht Gkss Forschung Spritzgießvorrichtung
DE10017393B4 (de) * 2000-04-07 2008-04-30 Volkswagen Ag Verfahren zur Herstellung von Druckgußkörpern sowie Dauerform
DE10022560A1 (de) * 2000-05-10 2001-11-15 Fuchs Lubritech Gmbh Druckgießmaschine
DE10045594B4 (de) * 2000-09-15 2006-01-19 Hansgrohe Ag Verfahren und Vorrichtung zum Gießen von Hohlkörpern
DE10054870B4 (de) * 2000-11-06 2008-04-24 Bühler Druckguss AG Druckgiessmaschine
DE10357365B4 (de) * 2002-12-11 2007-05-03 Metal Technologies Sachs Giesserei Gmbh Druckgießvorrichtung und Verfahren zum Druckgießen mit einem definierten Forminnendruck
DE102004057324A1 (de) * 2004-11-27 2006-06-01 Pfeiffer Vacuum Gmbh Vakuumdruckgussverfahren
US8030082B2 (en) 2006-01-13 2011-10-04 Honeywell International Inc. Liquid-particle analysis of metal materials
DE102007012577A1 (de) 2007-03-13 2008-09-18 Bühler Druckguss AG Verfahren zur Entlüftung von Formen
ITMI20101606A1 (it) * 2010-09-06 2012-03-07 Maicopresse Spa Dispositivo perfezionato per il riempimento di metallo fuso in camere di pressatura nelle macchine di pressofusione
DE102023100621A1 (de) 2023-01-12 2024-07-18 Thomas Ninkel Vorrichtung zum Schmelze-Dosieren an einer Druckgießmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3009218A (en) * 1958-10-22 1961-11-21 David M Morgenstern Apparatus for vacuum feeding a die casting machine
US4050503A (en) * 1973-08-16 1977-09-27 Institute Po Metaloznanie I Technologia Na Metalite Apparatus for controlling the rate of filling of casting molds
EP0051310A1 (fr) * 1980-11-03 1982-05-12 Maschinenfabrik Müller-Weingarten AG Appareil de moulage par injection pour la coulée de pièces
DE4123463A1 (de) * 1991-07-16 1993-01-21 Audi Ag Verfahren zur herstellung von gussstuecken mittels einer druckgiessmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950012481B1 (ko) * 1988-01-30 1995-10-18 도시바 기까이 가부시기가이샤 다이 캐스팅 머시인의 주조 제어 시스템
JPH04123860A (ja) * 1990-09-14 1992-04-23 Ryobi Ltd 射出成形機におけるガス抜き装置制御方法と制御装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3009218A (en) * 1958-10-22 1961-11-21 David M Morgenstern Apparatus for vacuum feeding a die casting machine
US4050503A (en) * 1973-08-16 1977-09-27 Institute Po Metaloznanie I Technologia Na Metalite Apparatus for controlling the rate of filling of casting molds
EP0051310A1 (fr) * 1980-11-03 1982-05-12 Maschinenfabrik Müller-Weingarten AG Appareil de moulage par injection pour la coulée de pièces
DE4123463A1 (de) * 1991-07-16 1993-01-21 Audi Ag Verfahren zur herstellung von gussstuecken mittels einer druckgiessmaschine

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19628870A1 (de) * 1996-07-17 1998-01-22 Alusuisse Bayrisches Druckgus Vorrichtung und Verfahren zur Herstellung von Druckgußteilen
US6125911A (en) * 1996-07-17 2000-10-03 Alusuisse Bayrisches Druckguss-Werk Gmbh & Co. Kg Method and apparatus for manufacturing die-castings
EP1080809A1 (fr) * 1999-08-30 2001-03-07 Müller Weingarten AG Méthode pour contrôler la distribution de quantité de métal liquide
US6379609B1 (en) 1999-08-30 2002-04-30 Muller Weingarten Ag Process for controlling the amount of metal metered
DE10140657C1 (de) * 2001-08-24 2002-11-07 Mueller Weingarten Maschf Messung des Druckes in einer Form während des Füllvorgangs
US6948549B2 (en) 2001-09-12 2005-09-27 Alcan Bdw Gmbh & Co. Kg Method for controlling a vacuum valve of a vacuum die casting device and a vacuum die casting device
EP1524048A1 (fr) * 2003-10-15 2005-04-20 Fondarex S.A. Appareil de moulage sous presssion ou par injection ainsi que actionneur et unité de compression et de contrôle associé
EP1832362A1 (fr) * 2006-03-06 2007-09-12 Pfeiffer Vacuum Gmbh Installation de coulée sous pression à vide et son procédé de fonctionnement
JP2013022621A (ja) * 2011-07-21 2013-02-04 Honda Motor Co Ltd 溶湯の供給方法及びその装置
CN105436460A (zh) * 2014-09-19 2016-03-30 Ksm铸造集团有限公司 铸模、特别是真空压铸模的能够由熔体填充的模具型腔中压力测量的装置
CN105436460B (zh) * 2014-09-19 2019-12-10 Ksm铸造集团有限公司 铸模、特别是真空压铸模的能够由熔体填充的模具型腔中压力测量的装置
US9427800B2 (en) 2014-09-19 2016-08-30 Ksm Castings Group Gmbh Device for measuring pressures in a mold cavity of a casting mold that can be filled with melt, particularly a vacuum die-casting mold
DE102014113570B3 (de) * 2014-09-19 2015-12-24 Ksm Castings Group Gmbh Einrichtung zur Messung von Drücken in einem mit Schmelze füllbaren Formhohlraum einer Gießform, insbesondere einer Vakuumdruckgussform
DE102016221674B4 (de) 2016-11-04 2020-06-18 Magna BDW technologies GmbH Steuerung für eine Vorrichtung zur Herstellung von Druckgussteilen
DE102016221678A1 (de) 2016-11-04 2018-05-09 Magna BDW technologies GmbH Vorrichtung zur Herstellung von Druckgussteilen
WO2018082939A2 (fr) 2016-11-04 2018-05-11 Magna BDW technologies GmbH Dispositif, commande et module de filtre permettant de produire des pièces moulées sous pression, ainsi que procédé associé
DE102016221674A1 (de) 2016-11-04 2018-05-09 Magna BDW technologies GmbH Steuerung für eine Vorrichtung zur Herstellung von Druckgussteilen
EP3593924A1 (fr) 2016-11-04 2020-01-15 MAGNA BDW technolgies GmbH Module filtrant dans un dispositif de fabrication de pièces coulées sous pression
DE102016221678B4 (de) 2016-11-04 2020-07-16 Magna BDW technologies GmbH Vorrichtung zur Herstellung von Druckgussteilen
US10994330B2 (en) 2016-11-04 2021-05-04 Magna BDW technologies GmbH Device, control system and filter module for producing die-cast parts, and method therefor
US10994329B2 (en) 2016-11-04 2021-05-04 Magna BDW technologies GmbH Device, control system and filter module for producing die-cast parts, and method therefor
CN107335789A (zh) * 2017-08-30 2017-11-10 鞍山海望真空系统有限公司 双独立系统压铸高真空装置
CN110076313A (zh) * 2019-05-05 2019-08-02 广东鸿图武汉压铸有限公司 一种基于真空排气和自然排气一体化的压铸模具

Also Published As

Publication number Publication date
DE4239558A1 (de) 1994-05-26
ES2134820T3 (es) 1999-10-16
DE59309656D1 (de) 1999-07-22
EP0600324B1 (fr) 1999-06-16

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