EP2140956B1 - Dispositif de coulée pour fontes métalliques - Google Patents

Dispositif de coulée pour fontes métalliques Download PDF

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Publication number
EP2140956B1
EP2140956B1 EP20090164471 EP09164471A EP2140956B1 EP 2140956 B1 EP2140956 B1 EP 2140956B1 EP 20090164471 EP20090164471 EP 20090164471 EP 09164471 A EP09164471 A EP 09164471A EP 2140956 B1 EP2140956 B1 EP 2140956B1
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EP
European Patent Office
Prior art keywords
pouring device
cross
flow path
inlet
section
Prior art date
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Active
Application number
EP20090164471
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German (de)
English (en)
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EP2140956A1 (fr
Inventor
Thorsten Reuther
Hartmut Hofmann
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.)
hofmann CERAMIC GmbH
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hofmann CERAMIC GmbH
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Publication of EP2140956A1 publication Critical patent/EP2140956A1/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
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001—Retaining slag during pouring molten metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/086—Filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001—Retaining slag during pouring molten metal
    • B22D43/004—Retaining slag during pouring molten metal by using filtering means

Definitions

  • the invention relates to a pouring device for molten metal.
  • large castings for example for wind turbines, are molded in such a way that the liquid metal is supplied through one or more filters or filter systems.
  • the large castings are castings, which may have a weight of up to, for example, 70 tons.
  • the slag is lighter than metal, that is, metal has a much greater density than slag.
  • the prior art ( FR 338 645 A ) includes a molten metal pouring device having at least one inlet port and one outlet port. In the pouring device, a flow path for the molten metal is formed. In this prior art pouring device, the molten metal flows through a plurality of chambers, wherein subsequent chambers are always smaller than previous chambers, so that the material flows through the subsequent chambers faster.
  • U.S. Patent 4,372,542 also includes a device for treating a molten metal.
  • This device provides a trough for receiving the molten metal.
  • the molten metal is passed through a predetermined flow path and heated several times by Bunsen burner to obtain a corresponding melting temperature.
  • the problem underlying the invention is to provide a sprue with which a flow control is optimized, in addition to the slag is separated to a very high degree and avoids the additional turbulence of the melt in the mold filling.
  • the molten metal casting device with at least one inlet opening and at least one outlet opening, wherein at least one flow path for the molten metal is formed between the at least one inlet opening and the at least one outlet opening and the flow path is deflected at least once by at least 90 ° by means of at least one web , characterized in that the pouring device has cross-sectional areas and that subsequent cross-sectional areas each have a larger cross-section than previous cross-sectional areas.
  • the sprue device according to the invention has at least one change in cross section in the flow path of the molten metal. Due to the cross-sectional enlargement, the flow velocity is significantly slowed down. This means that the slag settle can.
  • the sprue device according to the invention acts in this case as a flow regulator.
  • ceramic filters may be provided, any type of commercial ceramic filter.
  • the flow path is deflected at least once by 180 °.
  • a molten metal pouring device which may have one or more inlets (inlet openings) and one or more outlets (outlet openings), and in which the molten metal in its flow direction in the pouring device is deflected at least once by 180 ° before it is discharged.
  • at least two deflections of 180 ° are provided.
  • the deflections may also have other angular ranges than 180 °, for example 120 °, 150 ° or the like.
  • the at least one inlet opening is arranged downstream of an inlet area, and the inlet area has a larger cross section than the at least one inlet opening.
  • the average increase in the inlet area of the pouring device is essential.
  • the subsequent cross-sectional changes of cross-sectional areas in the pouring device are likewise designed such that the cross sections of the cross-sectional areas increase in each case to the preceding cross-sectional area.
  • the inlet area of the pouring device is made larger in cross-section than the inlet opening.
  • cross-sectional areas in the flow path are advantageously formed in each case extended to the previous cross-sectional areas.
  • the cross sections in the direction of the outlet opening are each enlarged relative to the preceding cross-sectional areas.
  • an inner wall of the pouring device has unevenness.
  • the unevenness the slag or non-metallic inclusions can better adhere to the sprue device and are not entrained by the flowing melt after settling on the inner wall.
  • the sprue device according to the invention may advantageously be arranged filters.
  • the sprue device can also be designed without a filter.
  • filters are used, advantageously porous ceramic filters can be used. On or before these ceramic filters, the slag is fixed. However, it is also possible to use other commercially available filters or other types of flow brakes.
  • the flow path of the pouring device is at least partially filled with polystyrene.
  • the polystyrene filling serves to prevent dirt from entering the filter when the filter is being transported to the place of use.
  • the polystyrene burns when the melt is introduced into the pouring device. Due to the gas pressure during combustion, the melt is decelerated, which in turn has an advantageous effect on the flow velocity.
  • a further advantageous embodiment of the invention provides that at least one reducing piece is arranged in the at least one inlet opening or one outlet opening. As a result, the diameter of the openings is variably adapted to the sprues.
  • the device is composed of various components, so that they can be relatively easily constructed.
  • the device may be formed of chamotte, refractory material, ramming mass, core sand and / or foundry sand.
  • Fig. 1 shows a pouring device 1 with an inlet 2 and an inlet opening 31 and outlets 3, 4 with outlet openings 32 for introducing and discharging a molten metal (not shown).
  • a flow path 27 is specified in the pouring device 1 .
  • ring lands 33 are provided in the pouring device 1 .
  • An inlet region 5 arranged downstream of the inlet 2 has a significantly enlarged cross-section with respect to the inlet 2, so that the flow velocity of the molten metal is slowed down.
  • areas 6, 7, the molten metal is deflected by 180 °. Further deflections by 180 ° take place in areas 8, 9; 10, 11.
  • cross-sectional areas 34, 35, 36 each have a larger cross-section than the preceding area, that is, the cross-sectional area 35 has a larger cross-section than the cross-sectional area 34 and the cross-sectional area 36 has a larger cross-section than the cross-sectional area 35.
  • the filters 13, 14, 15, 16 are optional.
  • the filters 13, 14, 15, 16 need not necessarily be provided.
  • the casting material (molten metal) is deflected at least once.
  • two to four 180 ° deflections are particularly advantageously provided before the material is discharged.
  • Fig. 1 three 180 ° deflections are provided.
  • the pouring device 1 is a round device with eight outlets 3, 4; 17, 18, 19 formed, with only five outlets are shown.
  • the outlets 3, 4; 17, 18, 19 can be arranged symmetrically as well as asymmetrically. It can also be provided any number of outlets and inlets.
  • FIG. 3 another embodiment of the invention is shown.
  • pouring device 1 are provided in the outlets 3, 4 no filter.
  • the pouring devices 1 according to the Fig. 1 and 3 consist of fireclay components 20 to 23, the only in Fig. 3 are provided with reference numbers.
  • the pouring device 1 according to Fig. 1 is also constructed of individual fireclay components, which together form the pouring device 1. In the construction, it can be selected whether and where filters are provided. Slag pick-up filters 38 hold the slag back.
  • Fig. 4 shows a pouring device 1 with an inlet opening 2 and two outlets 3, 4.
  • An inlet region 5 has a relation to the inlet 2 enlarged cross section.
  • the inlet 2 has a cross section A1 (ring opening). Downstream of the inlet area 27 are enlarged cross-sections A2, A3 in a flow path 27.
  • the cross section A4 is greater than the cross section A3 and the cross section A3 is greater than the cross section A2.
  • the cross section A2 is larger as the cross section A1.
  • the ratio of the cross section A4 to A1 is approximately equal to 19.
  • the outlets 3, 4 have the same cross sections as the inlet 2.
  • bores 30 are provided for venting the pouring device 1.
  • the openings 31 may be closed in the delivery state of the pouring device with adhesive tape (not shown), so that during transport no dirt settles in the pouring device.
  • the flow path 27 may also be at least partially filled with polystyrene (not shown).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (9)

  1. Dispositif de coulée pour fontes métalliques avec au moins une ouverture d'entrée et au moins une ouverture de sortie pour la fonte métallique, au moins une voie d'écoulement (27) pour la fonte métallique étant réalisée dans le dispositif de coulée (1) entre l'au moins une ouverture d'entrée (31) et l'au moins une ouverture de sortie (32), et pour lequel la voie d'écoulement (27) est réalisée déviée au moins une fois d'au moins 90 ° à l'aide d'au moins une nervure (33), caractérisé en ce que le dispositif de coulée (1) présente des zones de section (34, 35, 36) et en ce que des zones de section consécutives présentent chacune une section (A2, A3, A4) supérieure à celle des zones de section précédentes.
  2. Dispositif de coulée selon la revendication 1, caractérisé en ce que la voie d'écoulement (27) est réalisée déviée au moins une fois de 180°.
  3. Dispositif de coulée selon la revendication 1 ou 2, caractérisé en ce qu'en aval de l'au moins une ouverture d'entrée (31), une zone d'entrée (5) est prévue dans le dispositif de coulée (1), et en ce que l'au moins une zone d'entrée (5) présente une section plus grande que l'ouverture d'entrée (31).
  4. Dispositif de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une paroi intérieure (28) du dispositif de coulée (1) présente des aspérités (29).
  5. Dispositif de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce que la voie d'écoulement (27) du dispositif de coulée (1) est remplie au moins en partie de polystyrène.
  6. Dispositif de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un filtre (13 à 16) est disposé dans la voie d'écoulement (27).
  7. Dispositif de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un raccord de réduction est disposé dans l'au moins une ouverture de sortie (32).
  8. Dispositif de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de coulée (1) est réalisé composé de chamotte (20 à 23).
  9. Dispositif de coulée selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le dispositif de coulée (1) est constitué de masse réfractaire, de pisé réfractaire foulé, de sable à noyaux et/ou de sable de fonderie.
EP20090164471 2008-07-04 2009-07-02 Dispositif de coulée pour fontes métalliques Active EP2140956B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008031362 2008-07-04

Publications (2)

Publication Number Publication Date
EP2140956A1 EP2140956A1 (fr) 2010-01-06
EP2140956B1 true EP2140956B1 (fr) 2013-05-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104128599A (zh) * 2014-08-14 2014-11-05 济南圣泉倍进陶瓷过滤器有限公司 熔融金属过滤装置
CN111496242A (zh) * 2020-05-09 2020-08-07 南通大学 一种扰流式铝合金熔体除渣过滤装置及其使用方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103111586A (zh) * 2012-12-14 2013-05-22 镇江汇通金属成型有限公司 大尺寸铝青铜套浇注模具
CN109926552A (zh) * 2017-12-18 2019-06-25 福塞科国际有限公司 过滤装置
CN108380848B (zh) * 2018-06-01 2019-12-10 南京沃特电机有限公司 一种带双层环形挡渣堰的真空铸锭用中间包的应用方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR338645A (fr) 1903-11-13 1904-05-30 Nicolaus Mennickheim Procédé de moulage
US4372542A (en) 1981-06-19 1983-02-08 Soutwire Company Copper slag trap
DE3700107A1 (de) 1987-01-03 1988-07-14 Stettner & Co Vorrichtung zum giessen von metallischen schmelzen
CA2580166A1 (fr) * 2004-09-13 2006-03-23 Energetics Technologies, L.L.C. Procedes et installations de suppression des tourbillons apparaissant dans des paniers repartiteurs ou des poches de coulee pendant leur dechargement respectif

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104128599A (zh) * 2014-08-14 2014-11-05 济南圣泉倍进陶瓷过滤器有限公司 熔融金属过滤装置
CN111496242A (zh) * 2020-05-09 2020-08-07 南通大学 一种扰流式铝合金熔体除渣过滤装置及其使用方法

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Publication number Publication date
EP2140956A1 (fr) 2010-01-06

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