EP2489449A1 - 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
EP2489449A1
EP2489449A1 EP11001338A EP11001338A EP2489449A1 EP 2489449 A1 EP2489449 A1 EP 2489449A1 EP 11001338 A EP11001338 A EP 11001338A EP 11001338 A EP11001338 A EP 11001338A EP 2489449 A1 EP2489449 A1 EP 2489449A1
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EP
European Patent Office
Prior art keywords
feeder
shell
feeder body
exothermic
cavity
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
EP11001338A
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German (de)
English (en)
Other versions
EP2489449B1 (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
Original Assignee
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 in Contact with the hot, in the casting process in the riser cavity rising metal heat-generating material burning consists.
  • a feeder with the aforementioned features is for example in the EP 1 184 104 B1 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 a 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. This remains due to the heat longer liquid than the pending in the mold cavity of the mold metal and is thus usable for the return feed into the mold cavity.
  • 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 invention has the object, a feeder of the type mentioned to provide, with the same geometric dimension provides a higher module available or requires smaller size dimensions for a same required by casting module.
  • the invention provides in its basic idea a feeder in which the feeder body is enclosed on its outside at least in regions by a shell consisting of an insulating refractory material.
  • the invention is thus based on the idea to coat the known from the prior art, consisting of an exothermic material of known composition feeder body with an additional, now consisting of an insulating material outer shell.
  • the outer shell can be formed, for example, in a one-piece construction as a separate, on the existing exothermic material feeder body patch insulating.
  • an insulating shell or the insulating shell can lie directly against the outer surface of the existing exothermic material feeder body, or it For example, an air gap may be formed therebetween to provide additional insulation of the feeder body made of exothermic material.
  • 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 invention initially has the advantage that now between the existing of exothermic material feeder body and by taking place for the formation of the casting mold molding of the casting model with the attached feeder the mold surrounding sand an additional shell of an insulating material, which stores the heat produced by the liquid metal and the exothermic reaction with the existing exothermic material feeder body heat, so that there is an increase in the module of the feeder according to the invention in comparison with a consisting exclusively of exothermic material feeder.
  • the existing of the exothermic material feeder body due to the exothermic reaction in addition to the incoming liquid metal release a defined amount of heat that must be sized so that the despite the additional insulating shell possibly still resulting heat losses of the entire feeder system are compensated.
  • the module of a purely exothermic feeder according to the prior art is enlarged in a feeder according to the invention, that is, with a constant, required for casting reasons module, the dimensions of the feeder can be reduced even taking into account the insulating.
  • the weight of the feeder decreases to a significant degree because the insulating material has a lower specific gravity than the exothermic one Material.
  • the insulating material taking into account its density based on the raw materials to be used is cheaper.
  • the lower use of the exothermic mass for the presentation of a given module brings an environmentally friendly aspect, because fewer raw materials are needed.
  • lower emissions are also associated with the exothermic reaction which takes place.
  • the feeder body is completely enclosed by its side walls and its lid portion of the shell.
  • the shell enclosing the feeder body extends over the breaker core and extends to the footprint of the feeder on a casting mold forming the casting mold.
  • the shell enclosing the feeder body with a circumferential heel which projects in the direction of the feeder opening, covers the bottom area of the feeder body engages and thereby forms a part of the feeder forming breaker core; hereby associated with the advantage that can be dispensed with the use of a separate refractive core.
  • 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 a completely enclosed by an outer shell 18 formed of an insulating material.
  • 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.
  • FIG. 3 illustrated embodiment is according to FIG. 2 provided refractive core replaced by the fact that the outer shell 18 with a circumferential, in the direction of the opening formed in the bottom portion 15 of the feeder body 11 feed opening 16 the bottom portion 15 engages below and thereby even forms the shape of a refractive core with a connection opening 23 formed therein.
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 true EP2489449A1 (fr) 2012-08-22
EP2489449B1 EP2489449B1 (fr) 2015-12-02

Family

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EP11001338.0A Active EP2489449B1 (fr) 2011-02-18 2011-02-18 Masselotte dotée d'un corps d'alimentation exothermique et d'une enveloppe d'isolation extérieure

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Cited By (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
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
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
EP3756788A1 (fr) 2019-06-24 2020-12-30 GTP Schäfer Gießtechnische Produkte GmbH Insert d'alimentation doté d'un contour extérieur avant et arrière
EP3756787A1 (fr) 2019-06-24 2020-12-30 GTP Schäfer Gießtechnische Produkte GmbH Insert d'alimentation à gaine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648373A1 (fr) * 1989-06-14 1990-12-21 Daussan & Co Pot de fonderie
WO2000027560A1 (fr) * 1998-11-10 2000-05-18 Ashland Inc. Manchons multicouche et leurs utilisations
DE20112425U1 (de) 2001-07-27 2001-10-18 Gtp Schaefer Giestechnische Pr Speisereinsatz mit metallischem Speiserfuß
EP0888199B1 (fr) 1996-03-25 2002-10-09 Ashland Inc. Manchons, leur preparation et utilisation
EP1184104B1 (fr) 2000-08-08 2004-12-01 Chemex Gmbh Insert pour masselotte
WO2008003478A1 (fr) 2006-07-04 2008-01-10 AS Lüngen GmbH dispositif de distrIBution À insert isolant
DE102007012117A1 (de) * 2007-03-13 2008-09-18 AS Lüngen GmbH Luftspalt-Speiser

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648373A1 (fr) * 1989-06-14 1990-12-21 Daussan & Co Pot de fonderie
EP0888199B1 (fr) 1996-03-25 2002-10-09 Ashland Inc. Manchons, leur preparation et utilisation
WO2000027560A1 (fr) * 1998-11-10 2000-05-18 Ashland Inc. Manchons multicouche et leurs utilisations
EP1184104B1 (fr) 2000-08-08 2004-12-01 Chemex Gmbh Insert pour masselotte
DE20112425U1 (de) 2001-07-27 2001-10-18 Gtp Schaefer Giestechnische Pr Speisereinsatz mit metallischem Speiserfuß
WO2008003478A1 (fr) 2006-07-04 2008-01-10 AS Lüngen GmbH dispositif de distrIBution À insert isolant
DE102007012117A1 (de) * 2007-03-13 2008-09-18 AS Lüngen GmbH Luftspalt-Speiser

Cited By (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
EP3756788A1 (fr) 2019-06-24 2020-12-30 GTP Schäfer Gießtechnische Produkte GmbH Insert d'alimentation doté d'un contour extérieur avant et arrière
EP3756787A1 (fr) 2019-06-24 2020-12-30 GTP Schäfer Gießtechnische Produkte GmbH Insert d'alimentation à gaine

Also Published As

Publication number Publication date
EP2489449B1 (fr) 2015-12-02

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