EP2489449B1 - Masselotte dotée d'un corps d'alimentation exothermique et d'une enveloppe d'isolation extérieure - Google Patents

Masselotte dotée d'un corps d'alimentation exothermique et d'une enveloppe d'isolation extérieure Download PDF

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Publication number
EP2489449B1
EP2489449B1 EP11001338.0A EP11001338A EP2489449B1 EP 2489449 B1 EP2489449 B1 EP 2489449B1 EP 11001338 A EP11001338 A EP 11001338A EP 2489449 B1 EP2489449 B1 EP 2489449B1
Authority
EP
European Patent Office
Prior art keywords
feeder
sleeve
exothermic
feeder body
insulating
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.)
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Application number
EP11001338.0A
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German (de)
English (en)
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EP2489449A1 (fr
Inventor
Thomas Baginski
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.)
GTP Schaefer Giesstechnishe Produkte GmbH
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GTP Schaefer Giesstechnishe Produkte GmbH
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Application filed by GTP Schaefer Giesstechnishe Produkte GmbH filed Critical GTP Schaefer Giesstechnishe Produkte GmbH
Priority to EP11001338.0A priority Critical patent/EP2489449B1/fr
Publication of EP2489449A1 publication Critical patent/EP2489449A1/fr
Application granted granted Critical
Publication of EP2489449B1 publication Critical patent/EP2489449B1/fr
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Classifications

    • 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
    • B22C9/088—Feeder heads

Definitions

  • the invention relates to a feeder for insertion into a mold used in the casting of metals, comprising a feeder cavity enclosing feeder body consisting of a circumferential side wall, a lid portion and a feeder opening as a connection to the mold cavity having bottom portion, wherein the feeder body of an exothermic and contact heat with the hot metal rising in the riser cavity during the casting process, and enclosed on its outside by a shell made of an insulating refractory material, a refracting core consisting of a refractory material being disposed at the bottom of the feeder.
  • a feeder with the aforementioned features is in the DE 10 2007 012 117 A1 described.
  • the so-called modulus of the feeder defined as the ratio of the volume of the feeder cavity to the surface of the feeder, should be greater than the modulus of the casting to be cast.
  • the feeder body consists of an exothermic material, such as an aluminothermic Mixture. Such a material is ignited by the liquid metal entering the riser cavity, and therefore an exothermic reaction occurs following the rise of the liquid metal into the riser cavity through which heat is supplied to the metal in the riser cavity.
  • the feeder body made of the exothermic material is enclosed on its outside by a shell made of an insulating refractory material, and the insulating refractory material may be made of, for example, quartz sand as the refractory material with an added amount of aluminum silicate microbubbles as the insulating material.
  • the insulating refractory material may be made of, for example, quartz sand as the refractory material with an added amount of aluminum silicate microbubbles as the insulating material.
  • a gap is left between the feeder body and the outer shell as Isolierhohlraum.
  • the Brochkern extends over the entire bottom surface of the feeder body and this enclosing shell formed feeder.
  • a feeder is known whose existing of an exothermic material feeder body is enclosed by an existing of an insulating material sheath, which bears against the feeder body.
  • a breaker core is not present in the far known feeder.
  • a feeder with a comparable structure also results from the FR 2 648 373 A1 ; As far as this feeder a breaker core is provided, this seals in accordance with the prior art according to the DE 10 2007 012 117 A1 the entire bottom of the existing exothermic material feeder body and enclosing this, consisting of an insulating material shell.
  • the exothermic material is an oxidizable metal and an oxidizing agent, which can produce an exothermic reaction, including, it is already proposed to add components of an insulating refractory material to the exothermic material, so that there is an exothermic insulating material mixture.
  • the present invention seeks to improve a feeder with the aforementioned generic features in terms of its insulating effect yet.
  • the invention provides a feeder having the generic features in which the shell surrounding the feeder body, consisting of the insulating refractory material, extends over the refracting core consisting of the refractory material and extends as far as the footprint of the feeder on the casting model that the breaker core and the connection opening formed in it are covered by the additional insulating effect of the outer shell.
  • the invention thus has the advantage that the refracting core consisting of the refractory material is included in the insulating effect of the outer shell.
  • an insulating shell or the insulating shell can thereby abut directly on the outer surface of the consisting of exothermic material feeder body, or it may be an air gap formed therebetween, which causes additional insulation of the existing exothermic material feeder body.
  • a layer of a heat-reflecting material preferably an aluminum foil, is arranged between the feeder body and its outer shell.
  • a layer of a heat-reflecting material preferably an aluminum foil
  • the feeder body is completely enclosed by its side walls and its lid portion of the shell.
  • the out FIG. 1 apparent feeder 10 has a feeder body 11, which consists of a per se known exothermic material.
  • the exothermic feeder body 11 forms in its interior from a side wall 13 and a lid portion 14 enclosed feeder cavity 12.
  • a feeder opening 16 is formed in the bottom region 15 of the feeder body 11.
  • a metallic Feiserfuß 17 is additionally attached, as shown in the DE 201 12 425 U1 is known, the function of which is described in the aforementioned document.
  • Side wall 13 and lid portion 14 are in the in FIG. 1 illustrated embodiment of an outer shell 18 formed of an insulating material completely enclosed.
  • FIG. 1 illustrated feeder is placed on a casting model for the production of the mold, wherein the casting model including attached thereto riser of compacted molded sand is enclosed, so that after removal of the casting model from the mold remains to be filled during the casting process with the liquid cavity mold cavity.
  • the liquid metal introduced into the mold cavity of the mold rises into the feeder cavity 12 via the feeder foot 17 and the feeder orifice 16 and comes into contact with the feeder body 11 made of exothermic material so as to become an exothermic reaction at least partial combustion of the feeder body 11 comes.
  • the heat contained in the liquid metal and provided by the exothermic reaction is isolated by the outer, insulating material shell 18 against heat transfer in the molding sand surrounding the feeder, so that the overall heat balance of the feeder is improved for the feeding process. Due to the additionally provided by the arrangement of the outer shell isolation effect, the proportion of the exothermic material to form the feeder body 11 can be reduced in comparison with conventional, consisting only one feeder body of exothermic material feeders, without reducing the module of the feeder with the same size dimension , If, on the other hand, the feeder dimensions of a feeder having only one feeder body made of exothermic material are taken over unchanged, the module of a geometrically unchanged feeder can be enlarged by forming the feeder with a feeder body consisting of an exothermic material and an outer shell consisting of insulating material.
  • FIG. 2 illustrated embodiment differs from that FIG. 1 described embodiment first in that instead of the metallic Feiserfußes now consisting of a refractory material refractive core is arranged, as it is also part of a feeder from the generic type EP 1 184 104 B1 results.
  • the outer, consisting of the insulating material shell 18 extends beyond the breaker core 20 away, so that the breaker core 20 and the connection opening 21 formed in it are covered by the additional insulating effect of the outer shell 18.
  • an aluminum foil 25 is arranged to improve the insulating effect.
  • the inclusion of the cover region 14 of the feeder body 11 in the outer, insulating shell 18 is dispensed with, so that in the cover region 14 there is a contact of the feeder 10 with the molding sand surrounding it.
  • a partial enclosure of the feeder body 11 with the outer insulating shell 18 is sufficient, as a result of the incomplete filling of the feeder cavity 12 with the liquid metal in the lid portion 14 hardly sets an exothermic reaction and therefore Additional insulation is not essential in this area.

Claims (6)

  1. Dispositif d'alimentation (10), destiné à être utilisé dans un moule utilisé pour la coulée de métaux, avec un corps (11) de dispositif d'alimentation entourant une cavité (12) de dispositif d'alimentation, constitué d'une paroi latérale (13) périphérique, d'une zone de couvercle (14), ainsi que d'une zone de fond inférieur (15) comportant une ouverture (16) de dispositif d'alimentation faisant office de liaison avec la cavité du moule, le corps (11) du dispositif d'alimentation étant constitué d'une matière exothermique et combustible en générant de la chaleur lors du contact avec le métal chaud, qui remonte dans la cavité (12) du dispositif d'alimentation lors du processus de coulée et étant entouré sur sa face extérieure d'une coque (18) constituée d'une matière réfractaire isolante, sur la zone de fond inférieur (15) du dispositif d'alimentation étant placé un noyau de cassage (20) constitué d'une matière réfractaire, caractérisé en ce que la coque (18) entourant le corps (11) du dispositif d'alimentation, constituée de la matière réfractaire isolante s'étend par-dessus le noyau de cassage (20) constitué de la matière réfractaire et arrive jusqu'à la surface de contact du dispositif d'alimentation (10) sur un modèle de coulée formant le moule, de sorte que le noyau de cassage (20) et l'ouverture de liaison (21) formé en son intérieur soient englobés par l'effet isolant supplémentaire de la coque (18) extérieure.
  2. Dispositif d'alimentation selon la revendication 1, caractérisé en ce que la coque (18) est directement adjacente à la surface extérieure du corps (11) de dispositif d'alimentation constitué d'une matière exothermique.
  3. Dispositif d'alimentation selon la revendication 1, caractérisé en ce qu'entre la surface extérieure du corps (11) de dispositif d'alimentation constitué d'une matière exothermique et de la coque (18) entourant ce dernier, il est laissé une fente d'aération.
  4. Dispositif d'alimentation selon la revendication 1, caractérisé en ce qu'entre le corps (11) du dispositif d'alimentation et la coque (18) est placée une couche en matière thermo-réfléchissante.
  5. Dispositif d'alimentation selon la revendication 4, caractérisé en ce qu'entre le corps (11) du dispositif d'alimentation et la coque (18) est placé un film d'aluminium (25).
  6. Dispositif d'alimentation selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le mélange de matières du corps (11) de dispositif d'alimentation constitué d'une matière exotherme contient des petites parts de matière isolante.
EP11001338.0A 2011-02-18 2011-02-18 Masselotte dotée d'un corps d'alimentation exothermique et d'une enveloppe d'isolation extérieure Active EP2489449B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11001338.0A EP2489449B1 (fr) 2011-02-18 2011-02-18 Masselotte dotée d'un corps d'alimentation exothermique et d'une enveloppe d'isolation extérieure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11001338.0A EP2489449B1 (fr) 2011-02-18 2011-02-18 Masselotte dotée d'un corps d'alimentation exothermique et d'une enveloppe d'isolation extérieure

Publications (2)

Publication Number Publication Date
EP2489449A1 EP2489449A1 (fr) 2012-08-22
EP2489449B1 true EP2489449B1 (fr) 2015-12-02

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014083155A1 (fr) 2012-11-29 2014-06-05 Gtp Schäfer Giesstechnische Produkte Gmbh Procédé de fabrication d'une masselotte comportant un corps de masselotte exothermique ainsi qu'une coque extérieure isolante
DE102015103593B3 (de) * 2015-03-11 2016-05-12 GTP Schäfer Gießtechnische Produkte GmbH Verfahren zur Herstellung eines sowohl exotherme als auch isolierende Bereiche aufweisenden Speisereinsatzes
CN105382241A (zh) * 2015-12-30 2016-03-09 上海爱仕达汽车零部件有限公司 一种分油器箱体的浇铸工艺
EP3756787B1 (fr) 2019-06-24 2022-05-04 GTP Schäfer Gießtechnische Produkte GmbH Insert d'alimentation à gaine
EP3756788A1 (fr) 2019-06-24 2020-12-30 GTP Schäfer Gießtechnische Produkte GmbH Insert d'alimentation doté d'un contour extérieur avant et arrière

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648373B1 (fr) * 1989-06-14 1994-04-01 Daussan Cie Pot de fonderie
BR9601454C1 (pt) 1996-03-25 2000-01-18 Paulo Roberto Menon Processo para produção de luvas exotérmicas e isolantes.
WO2000027560A1 (fr) * 1998-11-10 2000-05-18 Ashland Inc. Manchons multicouche et leurs utilisations
DE10039519B4 (de) 2000-08-08 2007-05-31 Chemex Gmbh Speisereinsatz
DE20112425U1 (de) 2001-07-27 2001-10-18 Gtp Schaefer Giestechnische Pr Speisereinsatz mit metallischem Speiserfuß
DE102006030875A1 (de) 2006-07-04 2008-01-10 AS Lüngen GmbH & Co. KG Speiser mit isolierendem Einsatz
DE102007012117A1 (de) * 2007-03-13 2008-09-18 AS Lüngen GmbH Luftspalt-Speiser

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