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EP0711616A2 - Dispositif pour la coulée des métaux - Google Patents

Dispositif pour la coulée des métaux Download PDF

Info

Publication number
EP0711616A2
EP0711616A2 EP95116400A EP95116400A EP0711616A2 EP 0711616 A2 EP0711616 A2 EP 0711616A2 EP 95116400 A EP95116400 A EP 95116400A EP 95116400 A EP95116400 A EP 95116400A EP 0711616 A2 EP0711616 A2 EP 0711616A2
Authority
EP
European Patent Office
Prior art keywords
melt
casting
riser pipe
level
line
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
EP95116400A
Other languages
German (de)
English (en)
Other versions
EP0711616B1 (fr
EP0711616A3 (fr
Inventor
Alfred Dr. Walter
Hans-Jürgen Lau
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.)
Bachmann Giesserei und Formenbau GmbH and Co KG
Original Assignee
Bachmann Giesserei und Formenbau GmbH and Co KG
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 Bachmann Giesserei und Formenbau GmbH and Co KG filed Critical Bachmann Giesserei und Formenbau GmbH and Co KG
Publication of EP0711616A2 publication Critical patent/EP0711616A2/fr
Publication of EP0711616A3 publication Critical patent/EP0711616A3/fr
Application granted granted Critical
Publication of EP0711616B1 publication Critical patent/EP0711616B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D17/20—Accessories: Details
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations
    • 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
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B22D17/04—Plunger machines

Definitions

  • the invention relates to a device for casting metals, in particular alloys with a low melting point, with a melt container, which is connected to a casting mold via a pouring line, with a riser branching from the pouring line, which has an overflow opening over which the level of the metal level is adjustable in the pouring line and can be opened and closed via an overflow valve, and with a check valve in the pouring line, which prevents the melt from flowing back into the melt container.
  • Devices of this type are used, for example, in the production of lost cores for plastic injection-molded parts, as are used, inter alia, in the automotive industry. Since falling casting must be avoided in this case, the melt from the melt container is poured into the casting mold from below via the casting line and then, for example, the casting pressure is maintained until the metal in the casting mold has completely solidified. In order to remove the solidified casting from the mold and to change the tool, the connection between the casting line and the casting mold must be interrupted, and no liquid metal may flow out. At the same time, however, the pouring line should not be completely emptied in order to save time for the next pouring process and to avoid deposits on the walls of the pouring line.
  • the metal mirror in the Line set so that it is slightly below the point of separation between the mold and line.
  • the metal level in the system is specified via a riser pipe, the height of which corresponds to the desired metal level.
  • an overflow opening is provided in the riser pipe, which can be opened via an overflow valve.
  • the overflow opening is opened so that excess metal can flow off.
  • the pouring pipe and the riser pipe form communicating tubes so that the metal level in the pouring pipe cannot drop below the height specified by the overflow opening of the riser pipe.
  • a check valve prevents the melt from flowing back from the pouring line into the storage container.
  • the riser pipe is arranged outside the melting vessel, so that it has to be heated in order to prevent the melt from solidifying in the riser pipe.
  • the melt flowing out via the overflow opening is freely returned to the melt container. As the liquid metal comes into contact with air, oxidation can occur which affects the quality of the melt.
  • the object of the invention is therefore to enable the setting of the metal level in the system without the need for additional heating devices for the riser pipe.
  • the riser pipe is arranged within the melt container and is surrounded by the melt at least over part of its height. In this way, the melt contained in the riser pipe is automatically kept at the melting temperature, so that no additional heating devices are required. In addition, the ways for that The metal flows back from the riser pipe into the melt container shortened.
  • an inert medium is provided above the melt and the overflow opening of the riser pipe is below the level of the inert medium. This ensures that the liquid metal emerging from the overflow opening does not come into contact with air, so that oxidation is prevented and an optimal quality of the melt is ensured.
  • the inert medium provided above the melt also prevents oxidation on the metal surface of the melt container.
  • the inert medium is an inert liquid, in particular glycol, since this considerably simplifies handling.
  • an inert gas preferably nitrogen, can also be used.
  • level meters are provided in the melt container, via which the level of the melt and / or of the inert Medium is noticeable. This means that new melt can be supplied in good time.
  • the height of the overflow opening is preferably at or somewhat below the height of the separation point between the casting line and the casting mold.
  • the length of the riser pipe can be changed in order to be adaptable to different tool dimensions.
  • the overflow valve can be opened and closed in coordination with the casting process. Since pressure is released in the pouring line when the overflow valve is opened, the pouring process can be ended in a targeted manner via the overflow valve.
  • the overflow valve can preferably be actuated via a control device located outside the melting vessel.
  • the melt is usually conveyed to the casting mold by means of a pump.
  • the valves required for the pumping process are arranged in a valve block from which the pouring line branches off.
  • the riser branches off from the pouring line within the valve block, so that the riser pipe, the overflow valve and the valve block form a structural unit which can be inserted pre-assembled into the melt container.
  • the single figure shows a schematic representation of a casting device according to the invention.
  • Liquid metal 2 in particular an alloy with a low melting point, is contained in a melt container 1, for example an insulated double-walled steel tank.
  • the metal 2 is fed via a, for example, flexible, heated casting line 3 to a casting mold 4 into which the metal is poured from bottom to top.
  • the liquid metal 2 is pressed into the mold 4 under pressure, the air contained in the mold 4 escaping through a gap 7 between the mold halves 5, 6 or a relief valve (not shown).
  • the metal 2 is conveyed from the melt container 1 via a metering pump 8 into the casting line 3 and the casting mold 4.
  • the metering pump 8 is designed as a piston pump, the piston 9 being hydraulically drivable, for example, via a drive device 10. Liquid metal is usually sucked into the cylinder chamber 12 by lifting the piston 9 via a suction channel 11 and, after closing a valve 13, pressed into the pouring line 3 by lowering the piston 9.
  • the pouring line 3 is shut off by a check valve 14, so that no melt can flow back into the melt container when the pressure is released.
  • the metering pump 8 and the associated valves 13, 14 are provided in a valve block 15 which can be inserted in the melt container 1 as a pre-assembled unit.
  • a riser pipe 16 branches off from the casting line 3 within the valve block 15 and is surrounded by the melt 2 within the melt container 1 at least over part of its height. This ensures that the metal contained in the riser pipe does not cool or solidify.
  • the riser pipe 16 has an overflow opening 17 which can be opened or closed by an overflow or bypass valve 18.
  • the overflow valve 18 is located outside of the melt container 1 lying control device 19 actuated.
  • a gas preferably nitrogen, can also be used.
  • the level of the inert liquid 20 exceeds the overflow opening 17 of the riser pipe 16.
  • level gauges 21, 22 are provided in order to be able to control the level of the melt level and the level of the inert liquid 20, level gauges 21, 22 are provided.
  • the temperature of the melt is also monitored by a temperature sensor 23.
  • the liquid metal 2 is filled by means of the metering pump 8 via the pouring line 3 into the mold 4 from below, the casting pressure being maintained, for example, until the metal solidifies in the mold 4 is.
  • the connection between the casting line 3 and the mold 4 must be interrupted.
  • the metal level 25 in the system must be set somewhat below the separation point 26 between the casting line 3 and the casting mold 4.
  • the overflow valve 18 of the riser pipe 16 is opened, which brings about a pressure relief in the pouring line 3, with excess metal via the overflow opening 17 can flow back into the melt container 1.
  • the riser pipe 16 and the pouring line 3 form communicating tubes, so that the metal level 25 in the pouring line 3 cannot drop below the height of the overflow opening 17.
  • the height of the metal level 25 in the pouring line 3 can thus be set precisely by a corresponding adjustment of the length of the riser pipe 16.
  • the check valve 14 in the valve block 15 prevents the metal from flowing back into the melt container 1.
  • the inert liquid 20 in particular glycol
  • the metal emerging from the overflow opening 17 of the riser pipe 16 does not come into contact with air, but flows through the inert liquid 20 back into the melt bath. This prevents oxidation of the metal flowing back and the melt 2 retains the desired composition.
  • the level of the inert liquid 20 is monitored by means of the fill level meters 21, 22, so that additional melt can be supplied in good time.
  • the metal level 25 in the pouring line 3 is thus kept at the desired height in a simple manner, with no additional heating for the riser pipe 16 being required. At the same time, oxidation of the metal flowing back via the overflow opening 17 by the inert liquid 20 is reliably prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP95116400A 1994-11-15 1995-10-18 Dispositif pour la coulée des métaux Expired - Lifetime EP0711616B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4440768A DE4440768C1 (de) 1994-11-15 1994-11-15 Vorrichtung zum Gießen von Metallen
DE4440768 1994-11-15

Publications (3)

Publication Number Publication Date
EP0711616A2 true EP0711616A2 (fr) 1996-05-15
EP0711616A3 EP0711616A3 (fr) 1997-05-07
EP0711616B1 EP0711616B1 (fr) 1999-05-26

Family

ID=6533377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116400A Expired - Lifetime EP0711616B1 (fr) 1994-11-15 1995-10-18 Dispositif pour la coulée des métaux

Country Status (5)

Country Link
US (1) US5657812A (fr)
EP (1) EP0711616B1 (fr)
JP (1) JPH08224651A (fr)
CA (1) CA2162800A1 (fr)
DE (2) DE4440768C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812639A1 (fr) * 1996-06-12 1997-12-17 Ariake Ceramic Constructions Co., Ltd. Méthode et installation pour transvaser du métal en fusion
WO2003055627A1 (fr) * 2001-12-28 2003-07-10 Bbs-Riva S.P.A. Appareil permettant de former des coulees de metal et procede de formage de coulees de metal realise par cet appareil

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3817786B2 (ja) 1995-09-01 2006-09-06 Ｔｋｊ株式会社 合金製品の製造方法及び装置
US5924471A (en) * 1997-07-30 1999-07-20 Gnb Technologies, Inc. Method of fabricating lead bushings and batteries using same
JP3739541B2 (ja) * 1997-09-05 2006-01-25 パイオニア株式会社 情報再生装置
US6474399B2 (en) 1998-03-31 2002-11-05 Takata Corporation Injection molding method and apparatus with reduced piston leakage
US6540006B2 (en) 1998-03-31 2003-04-01 Takata Corporation Method and apparatus for manufacturing metallic parts by fine die casting
US6135196A (en) 1998-03-31 2000-10-24 Takata Corporation Method and apparatus for manufacturing metallic parts by injection molding from the semi-solid state
US5983976A (en) * 1998-03-31 1999-11-16 Takata Corporation Method and apparatus for manufacturing metallic parts by fine die casting
US6513571B1 (en) * 1998-05-27 2003-02-04 Hayes Lemmerz International, Inc. Apparatus for automatic refilling of a low pressure casting machine
GB9813826D0 (en) * 1998-06-27 1998-08-26 Campbell John Dispensing apparatus and method
US6578620B1 (en) * 1999-07-02 2003-06-17 Alcoa Inc. Filtering molten metal injector system and method
US6540008B1 (en) 1999-07-02 2003-04-01 Alcoa Inc. Molten metal injector system and method
US6666258B1 (en) 2000-06-30 2003-12-23 Takata Corporation Method and apparatus for supplying melted material for injection molding
AU2001234385A1 (en) * 2000-11-07 2002-05-21 Alcoa Inc. Molten metal injector system and method
AU2001236434A1 (en) * 2000-11-09 2002-05-21 Alcoa Inc. Filtering molten metal injector system and method
US6742568B2 (en) * 2001-05-29 2004-06-01 Alcoa Inc. Casting apparatus including a gas driven molten metal injector and method
US6742570B2 (en) 2002-05-01 2004-06-01 Takata Corporation Injection molding method and apparatus with base mounted feeder
US6841120B2 (en) * 2002-06-13 2005-01-11 Alotech Ltd. Llc Dispensing apparatus and method
US6945310B2 (en) * 2003-05-19 2005-09-20 Takata Corporation Method and apparatus for manufacturing metallic parts by die casting
US6880614B2 (en) * 2003-05-19 2005-04-19 Takata Corporation Vertical injection machine using three chambers
US6951238B2 (en) * 2003-05-19 2005-10-04 Takata Corporation Vertical injection machine using gravity feed
CN104588611B (zh) * 2015-02-28 2016-09-07 个旧市晟鼎纯锡工艺厂 一种压力铸造装置及压力铸造方法
TWI597111B (zh) * 2016-02-24 2017-09-01 中傳企業股份有限公司 應用於壓鑄機的射料系統

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* Cited by examiner, † Cited by third party
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FR905901A (fr) * 1943-03-06 1945-12-18 Machine travaillant à l'aide d'un piston presseur pour le moulage mécanique de pièces métalliques
DE1124195B (de) * 1957-06-21 1962-02-22 Heinrich Josef Baggeler Verfahren und Vorrichtung zum Giessen von Metallkoerpern mittels Druckgas
DE1055764B (de) * 1957-10-28 1959-04-23 Heinrich Josef Baggeler Vorrichtung zum Giessen von Metallkoerpern, insbesondere Metallplatten
BG22157A1 (fr) * 1975-10-27 1977-05-20
GB8425182D0 (en) * 1984-10-05 1984-11-14 Frys Metals Ltd Casting apparatus
US4958675A (en) * 1988-11-08 1990-09-25 Electrovert Ltd. Method for casting metal alloys with low melting temperatures
GB8927088D0 (en) * 1989-11-30 1990-01-31 Frys Metals Ltd Casting apparatus
US4991641A (en) * 1990-05-07 1991-02-12 Electrovert Ltd. Method of and apparatus for metal casting
US5125450A (en) * 1990-05-07 1992-06-30 Electrovert Ltd. Method of and system for controlling flow of molten liquid to cast metal alloys
US5181551A (en) * 1991-09-25 1993-01-26 Electrovert Ltd. Double acting cylinder for filling dies with molten metal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812639A1 (fr) * 1996-06-12 1997-12-17 Ariake Ceramic Constructions Co., Ltd. Méthode et installation pour transvaser du métal en fusion
WO2003055627A1 (fr) * 2001-12-28 2003-07-10 Bbs-Riva S.P.A. Appareil permettant de former des coulees de metal et procede de formage de coulees de metal realise par cet appareil

Also Published As

Publication number Publication date
DE59506022D1 (de) 1999-07-01
DE4440768C1 (de) 1996-07-25
JPH08224651A (ja) 1996-09-03
US5657812A (en) 1997-08-19
EP0711616B1 (fr) 1999-05-26
CA2162800A1 (fr) 1996-05-16
EP0711616A3 (fr) 1997-05-07

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