EP1166924A1 - Four de maintien, en particulier pour machine de coulée sous pression - Google Patents

Four de maintien, en particulier pour machine de coulée sous pression Download PDF

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Publication number
EP1166924A1
EP1166924A1 EP01112946A EP01112946A EP1166924A1 EP 1166924 A1 EP1166924 A1 EP 1166924A1 EP 01112946 A EP01112946 A EP 01112946A EP 01112946 A EP01112946 A EP 01112946A EP 1166924 A1 EP1166924 A1 EP 1166924A1
Authority
EP
European Patent Office
Prior art keywords
die
lid
molten material
bucket
furnace
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Withdrawn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
EP01112946A
Other languages
German (de)
English (en)
Inventor
Graziano Mortari
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.)
IDRA CASTING MACHINES S.P.A.
Original Assignee
Idra Presse SpA
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 Idra Presse SpA filed Critical Idra Presse SpA
Publication of EP1166924A1 publication Critical patent/EP1166924A1/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Withdrawn legal-status Critical Current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
    • B22D39/00—Equipment for supplying molten metal 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
    • B22D17/20—Accessories: Details
    • B22D17/28—Melting pots
    • 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
    • B22D17/20—Accessories: Details
    • B22D17/32—Controlling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/10—Slag pots; Slag cars
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/006—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with use of an inert protective material including the use of an inert gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/04—Crucible or pot furnaces adapted for treating the charge in vacuum or special atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/0806—Charging or discharging devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/10—Crucibles
    • F27B14/12—Covers therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B2014/0881—Two or more crucibles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers
    • F27D1/1808—Removable covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0014—Devices for monitoring temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D27/00—Stirring devices for molten material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2001/00—Composition, conformation or state of the charge
    • F27M2001/01—Charges containing mainly non-ferrous metals
    • F27M2001/012—Aluminium

Definitions

  • the present invention relates to a holding furnace particularly for a die-casting apparatus.
  • the main step consists in injecting a specific amount of molten metallic material in a die; optionally, in the case of vacuum die-casting, this is done after producing a vacuum inside the die.
  • the die-casting process is highly advantageous if it relates to the production of large batches meant for high-volume mass-manufacturing lines.
  • the recent trend is to use light alloys to produce castings to be used as structural elements and/or components, such as for example car chassis and body parts of assembly-line vehicles.
  • Standard die-casting apparatuses are scarcely suited for the production of vehicle frame or body components due to their brittle fracture behavior and to the porosity of the resulting castings.
  • Brittle fracture, porosity and inclusions are unacceptable in castings which should be welded and which are required, in various forms, to have high plastic deformation properties.
  • the molten material Before injection into the die, the molten material is retained in a holding furnace.
  • the holding furnaces currently in use are substantially constituted by containment bowls in which the molten material is kept at a constant temperature.
  • the material contained in the furnace is in contact with contaminating atmospheres constituted for example by air, consequently generating oxides and forming inclusions of gas inside the casting.
  • slag is sometimes present on the containment walls of the furnace and may compromise the purity of the casting and therefore its final mechanical characteristics.
  • the aim of the present invention is to provide a holding furnace whose structure is such as to solve the above noted problems observed in conventional holding furnaces.
  • an object of the present invention is to provide a furnace having such a structure that the molten material never makes contact with contaminating atmospheres or slag.
  • Another object of the invention is to provide a furnace which allows to work in a protective gas atmosphere.
  • Another object of the invention is to provide a holding furnace having a particularly simple structure.
  • a holding furnace particularly for a die-casting apparatus, characterized in that it comprises a bucket which can be heated, is adapted to contain molten material and is provided with a lid which can be opened and is shaped substantially like an inverted cup, said lid being provided with at least one opening for introducing a protective gas having a higher relative density than air and adapted to generate an atmosphere for protection from contact with air for said molten material at regions that are free from the containment means of the bucket.
  • a holding furnace according to the invention is generally designated by the reference numeral 10.
  • the furnace 10 is constituted by a substantially hollow body 11 which contains a bucket 12 for containing molten metallic material.
  • Heating elements 13 are provided on internal walls of the body 11 and are adapted to maintain the temperature of the molten material contained in the bucket 12.
  • the containment bucket 12 is provided with a lid 14 which is substantially shaped like an inverted cup and in which a protective gas, advantageously nitrogen, is contained which is adapted to generate an atmosphere for continuous protection against contact with air for the material contained in the bucket 12, at the surface that is not affected by the containment walls of the bucket 12.
  • a protective gas advantageously nitrogen
  • the lid 14 is provided with openings 15 for introducing the protective gas and with openings for placing probes 16 which are adapted to detect the physical characteristics of the gas.
  • the probe 16 is a thermocouple which detects the temperature of the gas.
  • the bucket 12 further has rounded walls which follow the revolving motion of a mixer 17 which allows to clean and degas the molten material.
  • the rounded walls facilitate the cleaning of any slag by virtue of corresponding cleaning means, which are not shown in the figure but are in any case of a per se known type.
  • the lid 14 can of course be opened to allow the insertion of the mixer 17 and the loading of the molten material.
  • the turntable 18 is circular and the two furnaces 10a and 10b are mounted in diametrically opposite positions.
  • Means for moving the turntable are associated with the turntable 18 and also comprise a motor 19.
  • the corresponding lid 14b opens to allow the insertion of the mixer 17 and the loading of the material by means of the loading channel 21.
  • the mixer 17 is then removed from the furnace 10b, the lid 14b is closed, and the turntable 18 turns until the furnace 18b is in the position that is occupied in Figure 2 by the furnace 10a, from which the molten material is taken in order to be loaded into injection units, not shown, of the die-casting apparatus.
  • furnace 10a that is subjected to the cleaning and degassing operation by means of the mixer 17 and to loading with new molten material.
  • a holding furnace has been in fact provided which allows to keep constantly in contact with a protective gas atmosphere the regions that are not affected by the means for containing the molten material.
  • the materials may be any according to requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manipulator (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP01112946A 2000-06-20 2001-06-06 Four de maintien, en particulier pour machine de coulée sous pression Withdrawn EP1166924A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000PD000046U IT249397Y1 (it) 2000-06-20 2000-06-20 Struttura di forno di stazionamento particolarmente per impianto di prpressofusione sottovuoto.
ITPD000046 2000-06-20

Publications (1)

Publication Number Publication Date
EP1166924A1 true EP1166924A1 (fr) 2002-01-02

Family

ID=11451833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01112946A Withdrawn EP1166924A1 (fr) 2000-06-20 2001-06-06 Four de maintien, en particulier pour machine de coulée sous pression

Country Status (6)

Country Link
US (1) US20010052662A1 (fr)
EP (1) EP1166924A1 (fr)
JP (1) JP2002001519A (fr)
BR (1) BR0102439A (fr)
CA (1) CA2350287A1 (fr)
IT (1) IT249397Y1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102261841A (zh) * 2011-08-11 2011-11-30 南通汉瑞实业有限公司 一种坩埚罩、其制造方法和装有坩埚罩的坩埚炉
CN104390456A (zh) * 2014-11-21 2015-03-04 浙江宇辰工业炉有限公司 金属均质熔化炉
CN106694864A (zh) * 2016-12-29 2017-05-24 北京航空航天大学 一种容纳金属熔体的容器及增加炉壁背压的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1864825B1 (fr) 2005-03-30 2014-05-28 National Printing Bureau, Incorporated Administrative Agency Produit imprime, procede et dispositif de detection d'un tel produit imprime, et procede et dispositif d'authentification
BR202017000383Y1 (pt) * 2016-01-10 2022-05-31 Amsted Rail Company, Inc Mecanismo de travamento para um corpo de tanque e cobertura de tanque de um tanque de pressão
CN112762711B (zh) * 2020-12-15 2022-09-02 山西江淮重工有限责任公司 熔体保护装置及熔体保护方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE86908C (fr) *
US2232886A (en) * 1938-10-20 1941-02-25 Magnesium Elektron Ltd Melting and casting of metals
EP0017331A1 (fr) * 1979-03-21 1980-10-15 Promagco Limited Coulée sous pression en chambre chaude
US4299268A (en) * 1979-06-07 1981-11-10 Maschinenfabrik & Eisengiesserei Ed. Mezger Ag Automatically controlled casting plant
DE4403285A1 (de) * 1994-01-31 1995-08-03 Alexander Fischer Dosierofen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE86908C (fr) *
US2232886A (en) * 1938-10-20 1941-02-25 Magnesium Elektron Ltd Melting and casting of metals
EP0017331A1 (fr) * 1979-03-21 1980-10-15 Promagco Limited Coulée sous pression en chambre chaude
US4299268A (en) * 1979-06-07 1981-11-10 Maschinenfabrik & Eisengiesserei Ed. Mezger Ag Automatically controlled casting plant
DE4403285A1 (de) * 1994-01-31 1995-08-03 Alexander Fischer Dosierofen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"TIEGELOFEN TEL-900 MIT DREHTISCH", ZEICHNUNGEN DER FIRMA ZPF-THERM GMBH, XX, XX, 1 January 1900 (1900-01-01), XX, pages 01 - 03, XP002950066

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102261841A (zh) * 2011-08-11 2011-11-30 南通汉瑞实业有限公司 一种坩埚罩、其制造方法和装有坩埚罩的坩埚炉
CN102261841B (zh) * 2011-08-11 2013-02-13 南通汉瑞实业有限公司 一种坩埚罩、其制造方法和装有坩埚罩的坩埚炉
CN104390456A (zh) * 2014-11-21 2015-03-04 浙江宇辰工业炉有限公司 金属均质熔化炉
CN106694864A (zh) * 2016-12-29 2017-05-24 北京航空航天大学 一种容纳金属熔体的容器及增加炉壁背压的方法

Also Published As

Publication number Publication date
ITPD20000046V0 (it) 2000-06-20
US20010052662A1 (en) 2001-12-20
ITPD20000046U1 (it) 2001-12-20
CA2350287A1 (fr) 2001-12-20
IT249397Y1 (it) 2003-05-07
JP2002001519A (ja) 2002-01-08
BR0102439A (pt) 2002-02-19

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