EP2489449B1 - Feeder with exothermic feeder body and external insulation jacket - Google Patents
Feeder with exothermic feeder body and external insulation jacket Download PDFInfo
- 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.)
- Active
Links
- 238000009422 external insulation Methods 0.000 title 1
- 239000000463 material Substances 0.000 claims description 30
- 238000005266 casting Methods 0.000 claims description 17
- 239000011819 refractory material Substances 0.000 claims description 15
- 239000011810 insulating material Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000005030 aluminium foil Substances 0.000 claims 1
- 150000002739 metals Chemical class 0.000 claims 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
Die Erfindung betrifft einen Speiser zum Einsetzen in eine beim Gießen von Metallen verwendete Gießform, mit einem einen Speiserhohlraum umschlie-ßenden Speiserkorpus, bestehend aus einer umlaufenden Seitenwand, einem Deckelbereich sowie einem eine Speiseröffnung als Verbindung zum Formhohlraum aufweisenden Bodenbereich, wobei der Speiserkorpus aus einem exothermen und bei Kontakt mit dem heißen, beim Gießprozess in den Speiserhohlraum aufsteigenden Metall hitzeerzeugend verbrennenden Material besteht und auf seiner Außenseite von einer aus einem isolierenden feuerfesten Material bestehenden Schale umschlossen ist, wobei am Bodenbereich des Speisers ein aus einem feuerfesten Material bestehender Brechkern angeordnet ist.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.
Ein Speiser mit den vorgenannten Merkmalen ist in der
Mit dem bekannten Speiser ist der Nachteil verbunden, dass beim Gießvorgang im Bereich des Brechkerns noch ein nicht-unerheblicher Wärmeabfluss eintreten kann, so dass insbesondere in der letzten Phase des Speisevorganges das Rückfließen von flüssigem Metall aus dem Speiserhohlraum in den Formhohlraum der Gießform nicht in ausreichendem Maße erfolgen kann.With the known feeder has the disadvantage that during the casting process in the region of the breaker core still a significant heat loss may occur, so that in particular in the last phase of the feeding process, the backflow of liquid metal from the feeder cavity into the mold cavity of the mold in sufficient Measurements can be made.
Aus der
Der
Weiterhin sind gemäß der
In der
Angesichts des vorstehend dargelegten Standes der Technik liegt der Erfindung der Aufgabe zugrunde, einen Speiser mit den eingangs genannten, gattungsgemäßen Merkmalen im Hinblick auf seine Isolierwirkung noch zu verbessern.In view of the above-described prior art, the present invention seeks to improve a feeder with the aforementioned generic features in terms of its insulating effect yet.
Die Lösung dieser Aufgabe ergibt sich aus dem Anspruch 1; vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.The solution to this problem arises from the claim 1; advantageous embodiments and modifications of the invention are specified in the dependent claims.
Die Erfindung sieht im Einzelnen einen Speiser mit den gattungsgemäßen Merkmalen vor, bei welchem die den Speiserkorpus umschließende, aus dem isolierenden feuerfesten Material bestehende Schale sich über den aus dem feuerfesten Material bestehenden Brechkern erstreckt und bis an die Aufstandsfläche des Speisers auf dem Gießmodell reicht, so dass der Brechkern und die in ihm ausgebildete Verbindungsöffnung von der zusätzlichen Isolierwirkung der äußeren Schale erfasst sind. Mit der Erfindung ist somit der Vorteil verbunden, dass der aus dem feuerfesten Material bestehende Brechkern in die Isolierwirkung der äußeren Schale einbezogen ist.Specifically, 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.
Nach Ausführungsbeispiolen der Erfindung kann eine isolierende Schale beziehungsweise kann die Isolierschale dabei unmittelbar an der Außenfläche des aus exothermen Material bestehenden Speiserkorpus anliegen, oder es kann ein Luftspalt dazwischen ausgebildet sein, der eine zusätzliche Isolierung des aus exothermem Material bestehenden Speiserkorpus bewirkt.According to embodiments of the invention, 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.
Nach einem Ausführungsbeispiel der Erfindung kann vorgesehen sein, dass zwischen dem Speiserkorpus und dessen äußerer Schale eine Schicht aus einem wärmereflektierenden Material, vorzugsweise eine Aluminiumfolie, angeordnet ist. Hierdurch wird die Isolationswirkung der äußeren Schale noch verstärkt.According to an exemplary embodiment of the invention, it can be provided that a layer of a heat-reflecting material, preferably an aluminum foil, is arranged between the feeder body and its outer shell. As a result, the insulating effect of the outer shell is reinforced.
Hinsichtlich der geometrischen Ausbildung der aus dem isolierenden Material bestehenden Schale in Bezug auf den aus exotherme Material bestehenden Speiserkorpus kann nach einem Ausführungsbeispiel der Erfindung vorgesehen sein, dass der Speiserkorpus mit seinen Seitenwänden und seinem Deckelbereich vollständig von der Schale umschlossen ist.With regard to the geometric configuration of the existing of the insulating material shell with respect to the consisting of exothermic material feeder body according to an embodiment of the invention can be provided that the feeder body is completely enclosed by its side walls and its lid portion of the shell.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung wiedergegeben, welches nachstehend beschrieben ist. Es zeigen:
- Fig. 1
- einen nicht der Erfindung entsprechenden, weil einen metallischen Speiserfuß aufweisenden Speiser mit einem aus einem exothermen Material bestehenden Speiserkorpus und einer äußeren, aus isolierendem Material bestehenden Schale in einer schematischen Schnittdarstellung,
- Fig. 2
- eine erfindungsgemäße Ausführungsform des in
Figur 1 dargestellten Speisers mit einem von der äußeren Schale umschlossenen Brechkern.
- Fig. 1
- a feeder having a metallic Feiserfuß with a consisting of an exothermic material feeder body and an outer shell made of insulating material in a schematic sectional view, not according to the invention.
- Fig. 2
- an embodiment of the invention in
FIG. 1 shown feeder with an enclosed by the outer shell breaker core.
Der aus
Ein in
Das in
Claims (6)
- A feeder (10) for insertion into a mould used for casting metals, having a feeder body (11) enclosing a feeder cavity (12), consisting of a circumferential side wall (13), a top region (14) as well as a base region (15) comprising a feeder opening (16) acting as the connection with the mould cavity, wherein the feeder body (11) consists of an exothermic material which incinerates to produce heat in contact with the hot metal rising in the feeder cavity (12) during the casting process and the outside of which is enclosed by a sleeve (18) consisting of an insulating refractory material, wherein a breaker core (20) consisting of a refractory material is disposed at the base region (15) of the feeder (10), characterized in that the sleeve (18) consisting of the insulating refractory material enclosing the feeder body (11) extends over the breaker core (20) consisting of the refractory material and reaches up to the contact surface of the feeder (10) on a casting pattern forming the mould so that the additional insulating action of the outer sleeve (18) extends to cover the breaker core (20) and the connecting opening (21) formed therein.
- The feeder as claimed in claim 1, characterized in that the sleeve (18) is placed directly on the outer surface of the feeder body (11) consisting of exothermic material.
- The feeder as claimed in claim 1, characterized in that an air gap is left between the outer surface of the feeder body (11) consisting of exothermic material and the sleeve (18) around the outside thereof.
- The feeder as claimed in claim 1, characterized in that a layer formed from a heat-reflective material is disposed between the feeder body (11) and the sleeve (18).
- The feeder as claimed in claim 4, characterized in that an aluminium foil (25) is disposed between the feeder body (11) and the sleeve (18).
- The feeder as claimed in one of claims 1 to 5, characterized in that the mixture of Materials of the feeder body (11) consisting of exothermic material does not contain any proportions of insulating material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11001338.0A EP2489449B1 (en) | 2011-02-18 | 2011-02-18 | Feeder with exothermic feeder body and external insulation jacket |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11001338.0A EP2489449B1 (en) | 2011-02-18 | 2011-02-18 | Feeder with exothermic feeder body and external insulation jacket |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2489449A1 EP2489449A1 (en) | 2012-08-22 |
EP2489449B1 true EP2489449B1 (en) | 2015-12-02 |
Family
ID=44009976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11001338.0A Active EP2489449B1 (en) | 2011-02-18 | 2011-02-18 | Feeder with exothermic feeder body and external insulation jacket |
Country Status (1)
Country | Link |
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EP (1) | EP2489449B1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2925466B1 (en) | 2012-11-29 | 2018-03-14 | GTP-Schäfer Giesstechnische Produkte GmbH | Method for producing a feeder having an exothermic feeder body and an insulating external shell |
DE102015103593B3 (en) * | 2015-03-11 | 2016-05-12 | GTP Schäfer Gießtechnische Produkte GmbH | Process for producing a feeder insert having both exothermic and insulating regions |
CN105382241A (en) * | 2015-12-30 | 2016-03-09 | 上海爱仕达汽车零部件有限公司 | Casting process of oil separator box body |
EP3756787B1 (en) | 2019-06-24 | 2022-05-04 | GTP Schäfer Gießtechnische Produkte GmbH | Feeder insert with sleeve |
EP3756788A1 (en) | 2019-06-24 | 2020-12-30 | GTP Schäfer Gießtechnische Produkte GmbH | Feeder insert with outer contour having recesses and protrusions |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2648373B1 (en) * | 1989-06-14 | 1994-04-01 | Daussan Cie | FOUNDRY POT |
BR9601454C1 (en) | 1996-03-25 | 2000-01-18 | Paulo Roberto Menon | Process for the production of exothermic and insulating gloves. |
AU1472400A (en) * | 1998-11-10 | 2000-05-29 | Ashland Inc. | Multiple layered sleeves and their uses |
DE10039519B4 (en) | 2000-08-08 | 2007-05-31 | Chemex Gmbh | feeder sleeve |
DE20112425U1 (en) | 2001-07-27 | 2001-10-18 | GTP Schäfer Gießtechnische Produkte GmbH, 41515 Grevenbroich | Feeder insert with metallic feeder foot |
DE102006030875A1 (en) | 2006-07-04 | 2008-01-10 | AS Lüngen GmbH & Co. KG | Feeder with insulating insert |
DE102007012117A1 (en) * | 2007-03-13 | 2008-09-18 | AS Lüngen GmbH | Feeder for producing cast metal pieces in a foundry comprises a feeder head having an insulating hollow chamber arranged around the periphery of an equalizing hollow chamber |
-
2011
- 2011-02-18 EP EP11001338.0A patent/EP2489449B1/en active Active
Also Published As
Publication number | Publication date |
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EP2489449A1 (en) | 2012-08-22 |
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