EP0972595B1 - Creuset de maintien - Google Patents

Creuset de maintien Download PDF

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Publication number
EP0972595B1
EP0972595B1 EP99113369A EP99113369A EP0972595B1 EP 0972595 B1 EP0972595 B1 EP 0972595B1 EP 99113369 A EP99113369 A EP 99113369A EP 99113369 A EP99113369 A EP 99113369A EP 0972595 B1 EP0972595 B1 EP 0972595B1
Authority
EP
European Patent Office
Prior art keywords
holding vessel
section
vessel according
filling duct
insert
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 - Lifetime
Application number
EP99113369A
Other languages
German (de)
English (en)
Other versions
EP0972595A1 (fr
Inventor
Wilfried Casper
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.)
Vesuvius Becker & Piscantor Grossalmeroder Sch
Original Assignee
Vesuvius Becker & Piscantor Gr
Vesuvius Becker & Piscantor Grossalmeroder Schmelztiegelwerke & Co KG GmbH
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 Vesuvius Becker & Piscantor Gr, Vesuvius Becker & Piscantor Grossalmeroder Schmelztiegelwerke & Co KG GmbH filed Critical Vesuvius Becker & Piscantor Gr
Publication of EP0972595A1 publication Critical patent/EP0972595A1/fr
Application granted granted Critical
Publication of EP0972595B1 publication Critical patent/EP0972595B1/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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • 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 warming crucible in the preamble of claim 1 specified genus.
  • Holding crucibles of the type of interest here serve, for. B. in aluminum foundries for Motor vehicle parts for holding liquid aluminum from a melting furnace coming, e.g. fed with the help of transport pans and in a holding pan on one Preselected temperature is ready for the casting process. Except for that Cast aluminum heaters of this type are also used for other liquid metals, used in particular non-ferrous metals, heavy metals and alloys thereof.
  • the molten metal is mostly directly and free from the transport pans Poured into the holding crucible. Therefore, the gradual filling of the Crucible numerous turbulences and eddies with the result that the metal melt with a large surface is exposed to the outside atmosphere and therefore large Amounts of harmful gases, especially hydrogen, can absorb.
  • An increased Hydrogen uptake can e.g. to undesired slag formation in the holding crucible lead and is also with regard to the later casting process in general undesirable. The same applies to the absorption of other gases.
  • the pipes connected to the filter housings are subject to the great heat of e.g. 720 ° C and more a great wear and tear due to the continuous movements of the filter housing a considerable risk of damage, so that their downtimes are short and frequent repairs are required.
  • Warming crucibles are known to avoid these problems (DE-U-296 00 045, EPA-A-0 133 419, GB-A-578 977), which has a permanently installed, have upwardly open filling channel, which is in a lower area in the receiving space empties.
  • This has the advantage that the holding crucible is integrated Filling channel that is made of the same material as the holding crucible and from one Pieces can be made with this and when using the holding crucible is not at risk of damage.
  • the Holding crucible integrated filling channel a largely turbulence-free filling of the crucible, see above that the gas absorption during the filling process is low.
  • the holding crucible of the type mentioned at the outset is particularly advantageous Way of a refractory material such.
  • B. graphite (DE-U 296 00 045, Fig. 1 and 2) and is made with refractory clay as a binder in a so-called isostatic pressing process manufactured.
  • a filling of the holding crucible with a molten metal because of the desired small diameter of the filling channel is not easily possible and the cross-sectional shape of the filling channel essentially only with that for its manufacture used drilling tool can be influenced.
  • the invention is therefore based on the object, the holding crucible at the beginning to designate the genus so that it is easily filled on the one hand, on the other hand but can still be easily provided with a filling channel, the one has largely freely selectable cross-sectional shape.
  • the filling channel designed according to the invention has the advantage that it is open simple way of connecting a filter housing serving to feed the molten metal as well as a largely freely selectable design of the cross-sectional course in its allows lower area. Further advantageous features of the invention emerge from the subclaims.
  • 1 and 2 contains a conventional, made of refractory holding crucible a bottom 1 and a jacket 2 rising from its circumference, both of them one Limit recording space 3 that is open at the top.
  • the bottom is 1 circular and the jacket 2 cup-shaped.
  • the holding crucible is provided with a permanently installed filling channel 4, which essentially extends from the bottom 1 to an upper end face 5 of the casing 2 is extended.
  • the filling channel 4 is in the exemplary embodiment as a penetrating the jacket 2, open passage formed at the upper end and otherwise closed passage, which is why the jacket 2 expediently has a lateral or radial filling channel 4 receiving approach 6 is provided or an increased wall thickness in this area has.
  • the filling channel 4 can have one regardless of the thickness of the jacket 2 receive any diameter, which in particular can also be larger, corresponds to the usual wall thickness of the jacket 2.
  • the filling channel 4 in Embodiment arranged parallel to a central axis 7 of the receiving space 3.
  • the filling channel 4 opens into the receiving space 3
  • the purpose of the filling channel 4 is e.g. at the lower end a radially inward Mouth opening 8, which through a through the approach 6 or the jacket 2, to the receiving space 3 open transverse channel 9 in terms of flow with the receiving space 3 is connected.
  • the transverse channel 9 preferably opens into the floor 1 Recording space 3. This can cause liquid metal that passes through the upper open end of the Filling channel 4 is supplied, flow down in this, in the region of the bottom 1 in the Access recording room 3 and then on the principle of communicating Gradually fill the tubes.
  • there is the advantage that practically only the liquid levels forming in the receiving space 3 are exposed to the external atmosphere is.
  • the metal can advantageously flow into the filling channel 4 without to come into contact with the outside atmosphere and without in the recording room 3 to generate harmful turbulence or turbulence.
  • the filling channel 4 and the approach 6 with the remaining parts of the holding crucible made from one piece and from the same refractory materials as these can, preferably in an isostatic pressing process.
  • the filling channel 4 a gradually decreasing cross-section downwards. This will be in the area the mouth opening 8 so-called bubbling effects avoided, which results in a highly calm flow.
  • the downward growing, e.g. conical cross-sectional constriction the filling channel 4 is preferably obtained in that the approach 6 initially with a cylindrical bore 10 (Fig. 1) and then into this e.g. tubular Insert 11 (FIG. 5) is used, which has an inner cross section of the bore 10 corresponding outer cross-section and one downwards in cross-section has a tapered inner surface.
  • the axis of the bore 10 preferably runs parallel to the central axis 7 in order to enable approximately the same wall thicknesses everywhere.
  • the transverse channel 9 is also useful only after the holding crucible has been pressed introduced to problems that arise when using inserts or the like. to avoid.
  • the insert 11 is expediently formed in two parts.
  • essentially hollow cylindrical having the shrinking inner cross section Section 11a is in a lower part of the formed as a blind bore Bore 10 inserted until it sits on the bottom.
  • a fluid connection to the transverse channel 9 (FIG. 5) is obtained in that the section 11a at the lower end is provided with an inclined end face 12.
  • the bore 10 has one where the section 11a comes to rest smaller diameter than in an overlying part to accommodate a Section 11b (Fig. 4) of the insert 11 is used, so that the bore 10 with a support shoulder 14 is provided. This serves to support one at the upper end of the section 11a attached flange 15 (Fig. 3), which also serves to support the lower End of the second, 11b inserted into the wider part of the bore 10 serves.
  • Section 11b is e.g. hollow cylindrical and has one in the assembled State with the passage of the section 11a coaxial passage.
  • the holding crucible according to the invention can open at its upper end simply connected to a filter housing 16 which also serves as a filling funnel become.
  • a filter housing 16 which also serves as a filling funnel become.
  • This consists essentially of a fire-resistant material manufactured, upwardly open shell 17 by a protection against mechanical Destruction serving steel jacket 18 is surrounded.
  • the filter housing 16 has on its Bottom of an outlet 19 which through corresponding openings in the shell 17 or in Steel jacket 18 formed and with an inwardly projecting, circumferential collar 20 (Fig. 5) is provided.
  • the holding crucible is inserted with section 11a e.g. on one Pedestal 21 of a heat generation, shown roughly schematically in FIG. 5 serving furnace 22 arranged.
  • the filter housing 16 is e.g. at the top End of this furnace 22 placed so that its outlet 19 coaxially over the filling channel 4 or the bore 10 of the holding crucible is arranged.
  • Section 11b of the Insert 11 inserted from above through the outlet 19 into the bore 10 until it below on flange 15 of section 11a and above with one attached to it itself Flange 23 rests on the collar 20.
  • This is a simple Get connection between the filter housing 16 and the filling channel 4, and the solution this connection can be made simply in that the filter housing 16 with a Lifting device or the like is lifted from the holding crucible.
  • a filter (not shown) can also be placed in the outlet 19, in particular a ceramic filter, used interchangeably to prevent metal melt on the Path to filter housing 16 to remove any contaminants.
  • section 11a of the insert 11 is preferably arranged fixed in the bore 10 and e.g. bonded to the bore wall with a refractory adhesive to thereby a rise of the metal in the interface between the bore wall and the Avoid insert 11.
  • section 11b is preferably loose in the bore 10 used so that it can be replaced if necessary.
  • the two sections 11a, 11b are preferably also produced by isostatic pressing, the manufacture of the downwardly tapered passage in Section 11a e.g. by inserting an appropriate, e.g. conical core.
  • An advantage of the holding crucible described with reference to FIGS. 3 to 5 is that the liquid molten metal or the like supplied by means of transport pans, in the Shell 17 poured, filtered and then gently and without turbulence in the recording room 3 can be forwarded.
  • the invention is not limited to the exemplary embodiments described, which are based on can be modified in many ways. This applies especially to those from the Drawings apparent location and design of the filling channel, which is also different could be designed and arranged. For example, it would be possible to fill the filling channel in to accommodate an approach projecting inward into the holding space of the holding crucible or to be arranged at an angle to the central axis of the receiving space. Besides that would be it is possible to manufacture the filling channel independently of the holding crucible and subsequently to connect with this. Finally, it is understood that the various characteristics of the Invention also in combinations other than those shown and described can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Finger-Pressure Massage (AREA)
  • Lasers (AREA)

Claims (12)

  1. Creuset de maintien au chaud pour du métal liquide, avec un fond (1), avec une enveloppe (2) se dressant verticalement à partir du pourtour du fond (1) et délimitant un espace récepteur (3) pour le métal, et avec un canal de remplissage (4) incorporé dans la région de l'enveloppe (2) et ouvert vers le haut, qui débouche dans une région inférieure de l'espace récepteur (3), l'enveloppe (2), le fond (1) et le canal de remplissage (4) étant fabriqués d'un seul tenant en un matériau réfractaire, caractérisé en ce que le canal de remplissage (4) présente dans une partie supérieure un plus grand diamètre, formant un épaulement d'appui (14), que dans une partie inférieure.
  2. Creuset de maintien au chaud selon la revendication 1, caractérisé en ce qu'il est fabriqué par une opération de pressage isostatique, et le canal de remplissage (4) est fabriqué après le pressage, par perçage.
  3. Creuset de maintien au chaud selon la revendication 1 ou 2, caractérisé en ce que le canal de remplissage (4) présente une section intérieure qui diminue progressivement vers le bas.
  4. Creuset de maintien au chaud selon l'une des revendications 1 à 3, caractérisé en ce que le canal de remplissage (4) est formé par un élément rapporté (11) tubulaire, disposé dans le perçage (10).
  5. Creuset de maintien au chaud selon la revendication 4, caractérisé en ce que le perçage (10) est réalisé cylindrique, et en ce que l'élément rapporté (11) présente une section extérieure correspondant à la section intérieure du perçage (10) et une section intérieure diminuant progressivement vers le bas.
  6. Creuset de maintien au chaud selon la revendication 5, caractérisé en ce que l'élément rapporté (11) présente une face d'enveloppe intérieure conique.
  7. Creuset de maintien au chaud selon l'une des revendications 4 à 6, caractérisé en ce que l'élément rapporté (11) présente une partie inférieure (11a) disposée fixement dans le perçage (10) et présentant la section intérieure diminuant, et une partie supérieure (11b) disposée avec possibilité de remplacement dans le perçage (10).
  8. Creuset de maintien au chaud selon la revendication 7, caractérisé en ce que la partie inférieure (11a) est pourvue à l'extrémité supérieure d'un collet (15) pouvant s'appuyer sur l'épaulement d'appui (14).
  9. Creuset de maintien au chaud selon l'une des revendications 1 à 8, caractérisé en ce qu'un boítier de filtre (16) est associé à son extrémité supérieure, boítier qui présente une sortie (19) pouvant être raccordée au canal de remplissage (4).
  10. Creuset de maintien au chaud selon la revendication 9, caractérisé en ce qu'un filtre est installé dans la sortie (19).
  11. Creuset de maintien au chaud selon la revendication 9 ou 10, caractérisé en ce que la sortie (19) et le canal de remplissage (4) sont disposés essentiellement coaxialement l'un au-dessus de l'autre.
  12. Creuset de maintien au chaud selon l'une des revendications 7 à 11, caractérisé en ce que la partie inférieure (11a) de l'élément rapporté (11) est fixée par collage dans le perçage (10).
EP99113369A 1998-07-13 1999-07-10 Creuset de maintien Expired - Lifetime EP0972595B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19831296A DE19831296C2 (de) 1998-07-13 1998-07-13 Warmhaltetiegel
DE19831296 1998-07-13

Publications (2)

Publication Number Publication Date
EP0972595A1 EP0972595A1 (fr) 2000-01-19
EP0972595B1 true EP0972595B1 (fr) 2004-11-17

Family

ID=7873860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99113369A Expired - Lifetime EP0972595B1 (fr) 1998-07-13 1999-07-10 Creuset de maintien

Country Status (3)

Country Link
EP (1) EP0972595B1 (fr)
AT (1) ATE282494T1 (fr)
DE (2) DE19831296C2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114700486A (zh) * 2022-03-11 2022-07-05 温州瑞明工业股份有限公司 内置保温式铝水转运包

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB578977A (en) * 1944-06-23 1946-07-18 Stone J & Co Ltd Improvements in the treatment of magnesium base alloys and the production of pressure die-castings therefrom
DE29600045U1 (de) * 1996-01-03 1996-02-29 FEMUK Labortechnik GmbH, 82467 Garmisch-Partenkirchen Warmhaltetiegel mit Vorkammer aus Graphit oder Metall

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455238A (en) * 1982-04-14 1984-06-19 Daniel E. Groteke Apparatus and method for filtration of a molten metal stream
IT1168806B (it) * 1983-07-27 1987-05-20 Giuseppe Crescenzi Forno elettrico ad induzione a crogiolo per la colata a pressione
JPS6393466A (ja) * 1986-10-06 1988-04-23 Kubota Ltd 注湯取鍋用溶湯注入器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB578977A (en) * 1944-06-23 1946-07-18 Stone J & Co Ltd Improvements in the treatment of magnesium base alloys and the production of pressure die-castings therefrom
DE29600045U1 (de) * 1996-01-03 1996-02-29 FEMUK Labortechnik GmbH, 82467 Garmisch-Partenkirchen Warmhaltetiegel mit Vorkammer aus Graphit oder Metall

Also Published As

Publication number Publication date
ATE282494T1 (de) 2004-12-15
DE19831296C2 (de) 2002-05-16
DE59911073D1 (de) 2004-12-23
EP0972595A1 (fr) 2000-01-19
DE19831296A1 (de) 2000-01-20

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