WO2004022262A1 - Manchon, son procede de fabrication et melange pour la production dudit manchon - Google Patents

Manchon, son procede de fabrication et melange pour la production dudit manchon Download PDF

Info

Publication number
WO2004022262A1
WO2004022262A1 PCT/ES2002/000422 ES0200422W WO2004022262A1 WO 2004022262 A1 WO2004022262 A1 WO 2004022262A1 ES 0200422 W ES0200422 W ES 0200422W WO 2004022262 A1 WO2004022262 A1 WO 2004022262A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
exothermic
gas
production
resins
Prior art date
Application number
PCT/ES2002/000422
Other languages
English (en)
Spanish (es)
Inventor
Jaime Prat Urreiztieta
Original Assignee
Iberia Ashland Chemical, S.A.
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
Priority to AT02770003T priority Critical patent/ATE365086T1/de
Priority to JP2004533521A priority patent/JP4413780B2/ja
Application filed by Iberia Ashland Chemical, S.A. filed Critical Iberia Ashland Chemical, S.A.
Priority to CNB028295897A priority patent/CN1305601C/zh
Priority to DE60220841T priority patent/DE60220841T2/de
Priority to US10/526,856 priority patent/US20050247424A1/en
Priority to MXPA05002612A priority patent/MXPA05002612A/es
Priority to EP02770003A priority patent/EP1543897B1/fr
Priority to CA002498240A priority patent/CA2498240C/fr
Priority to PT02770003T priority patent/PT1543897E/pt
Priority to ES02770003T priority patent/ES2288560T3/es
Priority to DK02770003T priority patent/DK1543897T3/da
Priority to SI200230596T priority patent/SI1543897T1/sl
Priority to AU2002336110A priority patent/AU2002336110B2/en
Priority to BRPI0215879-5A priority patent/BR0215879B1/pt
Priority to PCT/ES2002/000422 priority patent/WO2004022262A1/fr
Publication of WO2004022262A1 publication Critical patent/WO2004022262A1/fr
Priority to HK05110239A priority patent/HK1078288A1/xx
Priority to US12/026,697 priority patent/US20080121363A1/en

Links

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
    • 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
    • B22C9/084—Breaker cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/06—Ingot moulds or their manufacture
    • B22D7/10—Hot tops therefor
    • B22D7/104—Hot tops therefor from exothermic material only

Definitions

  • This invention relates to exothermic sleeves for obtaining minimazarotas applicable to obtaining castings, especially ductile iron, to the process for their production by blowing and cold box curing and to the mixture that constitutes said sleeve.
  • the production of cast metal parts includes pouring the molten metal into a mold, solidifying the metal by cooling, and removing or removing the part formed by removing or destroying the mold.
  • the molds can be metallic or can be formed by aggregates of different materials (ceramic, graphite and, above all, sand). These molds must have drinkers or communication holes between the internal and external cavity, through which the molten metal is poured in the molding or casting phase. Due to the contraction of the metal during cooling, overflows must be provided in the mold, which are filled with reserve molten metal in order to form a riser intended to compensate for the contractions or cracks in the metal. The riser is intended to feed the piece when the broth contracts in it, so the metal must remain in the riser in a liquid state for a longer period of time than the piece. For this reason, the risers are usually covered with sleeves, Composed of insulating and / or exothermic materials, which retard the cooling of the metal contained in the risers to guarantee their fluidity when chinks occur in the cast metal.
  • exothermic sleeves around the risers reduces shrinkage problems and improves the quality of the castings, which allows the use of smaller risers (miniature risers) that improve production and reduce the contact area of the riser with the piece casting, the removal of which costs money.
  • Exothermic fiber-based sleeves are known made in the wet route from a fibrous refractory material combined with a mixture of materials capable of producing an exothermic reaction consisting of an oxidizable metal, in which aluminum is the most commonly used, an agent oxidant and a flux or initiator of the exothermic reaction, which is usually a fluorinated compound.
  • the oxidizable metal when mixed with the oxidizing agent and flux and exposed to extreme heat, oxidizes releasing heat as the reaction progresses.
  • Exothermic sand-based sleeves are also known, highly appreciated in ductile iron foundries.
  • the composition of these high-density sand-based sleeves contain a greater amount of very high aluminum so that the amount of heat generated is very high. This heat is necessary to raise the temperature of the sand-based sleeve before favorably influencing the temperature of the metal in the riser.
  • Patent application WO 97/00172 describes a cold box curing and blow molding process for manufacturing dimensionally accurate, exothermic and / or insulating sleeves from a blown-in-mold mix consisting of aluminum silicate microspheres containing in alumina less than 38% by weight, a cold box curing binder and, optionally, non-fibrous fillers.
  • a typical composition for the production of exothermic sleeves comprises hollow microspheres with an alumina content of less than 38% by weight, powdered aluminum, iron oxide and cryolite as fluorinated flux.
  • mini-risers whose function is also to feed liquid to the piece while it contracts during solidification.
  • fisheye is a superficial defect in the casting, originating by the accumulation of materials from the recovery of polluted sands, mainly by aluminum, which is found in high proportions in exothermic sleeves.
  • This second problem is caused by the excess of fluorine from fluorinated materials that are usually used as a starting charge for the exothermic reaction.
  • the invention faces the challenge of providing a sleeve for obtaining mini-risers that does not require the use of the "biscuit" free of fluorine, or any other element to avoid the contact of the sleeve with the piece and that, on the other hand, produces a notch in the riser to facilitate its later separation from the cast piece and all this from a blown, fluorine-free mixture capable of producing an exothermic reaction to supply the required heat.
  • Said exothermic sleeve for obtaining minimazarotas is obtained by blowing and subsequent cold box curing of a fluorine-free mixture comprising (a) hollow spheres of alumina silicate; (b) an exothermic material comprising:
  • Aluminum, silicon and others can be used as oxidizable metals.
  • oxidizing agents nitrates, glorates, permanganates and metal oxides such as iron and magnesium oxide and, of course, combinations of these compounds can be used.
  • Magnesium is used as the initiating agent for the exothermic reaction.
  • Figure 1 illustrates the steps for the production of a sleeve using a conventional cold box curing and blowing process belonging to the state of the art.
  • the mix for the production of sleeves is blown into a mold (3) with the collaboration of a male (2) [Figure 1A]; then, the sleeve (1) is cured and it is removed from the mold leaving the hole destined for the riser (4) [ Figure IB]; and, finally, an intermediate biscuit (5) is applied that has a hole (6) for the passage of the broth [Figure 1C].
  • Figure 2 illustrates the steps for the production of an exothermic sleeve according to the cold box cure and blow method provided by the present invention.
  • the invention relates to a process for the production by blow molding and cold box curing of an exothermic sleeve for obtaining mini-taps, comprising:
  • (A) introduce, by blowing, into a cold box curing mold, in the space defined between the mold and two males that make up a double chamfer at the mouth of the sleeve, a blowable mixture, to obtain an open, uncured sleeve at its two ends, in which said mixture comprises:
  • an exothermic mixture comprising a oxidizable metal and an oxidizing agent capable of generating an exothermic reaction, and magnesium as a starting material for the reaction.
  • the double chamfer (8) of the sleeve will produce a formally equivalent fingerprint or notch in the riser that defines and facilitates the line of cut for the separation of the lingo of the piece.
  • the insulating / refractory material (al) present in the fluorine-free composition for the production of sleeves is a material that basically comprises hollow microspheres of aluminum silicate, although it could also contain a certain amount of sand, on the assumption that, sacrificing Insulating capacity, want to improve the mechanical characteristics of the sleeve.
  • the amount of insulating / refractory material (a.l) will be between 30 and 70% by weight with respect to the total fluorine-free composition.
  • the exothermic material (a.2) present in the fluorine-free composition for the production of sleeves comprises an oxidizable metal and an oxidizing agent capable of generating an exothermic reaction, wherein said exothermic material comprises:
  • magnesium as an initiator of the ixothermal reaction, together with one or more oxidizable metals, preferably a mixture of aluminum powder and granules.
  • an oxidizing agent capable of reacting with the oxidizable metal and generating an exothermic reaction at the metal pouring temperature, said oxidizing agent being selected from the group consisting of (a) alkali or alkaline earth metal salts, for example, nitrates, chlorates and alkali or alkaline earth metal permanganates; (b) metal oxides, for example, iron and manganese oxides, preferably iron oxide; and (c) mixtures of (a) and (b).
  • Said exothermic material (a.2) is in non-fibrous form, to be blown.
  • a characteristic of the composition for the production of exothermic sleeves according to the present invention is that said composition lacks the inorganic fluorinated fluxes commonly used as initiators of the exothermic reaction. Instead, magnesium is used which reacts at a lower temperature whereby the exothermic reaction generated between the oxidizable metal and the oxidizing agent begins earlier.
  • the reaction between the oxidizable metal and the oxidizing agent is an exothermic reaction that generates heat thereby enhancing the thermal properties of the exothermic sleeves. In this way, the temperature loss of the molten material in the sprue is reduced, which keeps it hotter and more liquid for a longer time.
  • the amount of oxidizable metal present in the exothermic material (a.2) will be between 20 and 30% by weight with respect to the total fluorine-free composition for production of the cuff.
  • the procedure provided by this invention allows exothermic sleeves to be obtained with the desired balance of insulating and exothermic properties by simply using the amounts of insulating material (al) and exothermic material (a.2) present in component A in the appropriate weight ratios .
  • Cold box curing binders that can be used in the mix for the production of sleeves according to the sleeve manufacturing process provided by this invention are known.
  • any cold box curing binder that be able to maintain the fluorine-free composition for the production of sleeves in the form of a sleeve and polymerize in the presence of a curing catalyst can be used.
  • phenolic resins, phenol-urethane resins, epoxy acrylic resins, alkaline phenolic resins, silicate resins, etc. can be used. activated by an appropriate gas phase catalyst.
  • said cold box curing binder is selected from S0 2 (gas) activated epoxy-acrylic resins and amine (gas) activated phenol-urethane resins known as EXACTCAST ® cold box curing binders. (Ashland).
  • the required amount of cold box curing binder is the effective amount to maintain the shape of the sleeve and allow for its effective cure, ie, such an amount as to produce a sleeve that can be handled after curing.
  • the amount of cold box curing binder will be between 1 and 10% of the total composition for the production of the sleeve.
  • the cold box cure catalyst is applied as a gas by passing it through the sleeve, until the sleeve reaches a manageable consistency.
  • the gas phase catalyst can be an amine, carbon dioxide, methyl formate, sulfur dioxide, etc. depending on the cold box curing binder used.
  • exothermic sleeves can be obtained with dimensional accuracy, both internal and external, which can be coupled easily to the cast molding assembly after being manufactured without the need for additional manipulations.
  • the sleeve (1) provided by this invention comprises
  • the double chamfer (8) present in the sleeve provided by this invention is due to the combined action of 2 males (2,2 ') during the blowing of the mixture.
  • the double chamfer (8) will define a lug or notch in the riser that facilitates its separation from the casting.
  • the sleeve manufacturing process which comprises the combined action of 2 males, 2 open ends are generated.
  • One of these ends contains a double chamfer (8) while the other of the open ends is closed with a plug (9) in order to prevent the passage of sand or any other undesirable element into the sleeve during placement thereof in the mold and, of course, during the casting operation. Therefore, said plug (9) does not have any structural mission or intervene in the formation or performance of the riser, and, due to Thus, the material used in the manufacture of the stopper can be practically any material, advantageously a cheap material, such as plastic, wood, sawdust, paper, sand, etc., or even the constituent material of the sleeve itself.

Abstract

L'invention concerne un procédé de fabrication de manchons pour mini masselottes. Ce procédé consiste à introduire par soufflage un mélange sans fluor constitué de microsphères de silicate d'aluminium, d'un métal oxydable, tel que de l'aluminium en poudre, d'un agent oxydable, et de magnésium utilisé en tant qu'élément initiateur de la réaction exothermique, dans un moule pourvu de deux pièces mâles afin de créer un manchon comportant deux ouvertures. L'une de ces ouvertures se ferme au moyen d'un bouchon avant son utilisation.
PCT/ES2002/000422 2002-09-09 2002-09-09 Manchon, son procede de fabrication et melange pour la production dudit manchon WO2004022262A1 (fr)

Priority Applications (17)

Application Number Priority Date Filing Date Title
AU2002336110A AU2002336110B2 (en) 2002-09-09 2002-09-09 Sleeve, production method thereof and mixture for production of same
CA002498240A CA2498240C (fr) 2002-09-09 2002-09-09 Manchon, son procede de fabrication et melange pour la production dudit manchon
CNB028295897A CN1305601C (zh) 2002-09-09 2002-09-09 套筒、其制造方法和用于生产所述套筒的混合物
DE60220841T DE60220841T2 (de) 2002-09-09 2002-09-09 Hülse, herstellungsverfahren derselben und gemisch zur herstellung derselben
US10/526,856 US20050247424A1 (en) 2002-09-09 2002-09-09 Sleeve, production method thereof and mixture for production of same
MXPA05002612A MXPA05002612A (es) 2002-09-09 2002-09-09 Manguito, procedimiento para su fabricacion y mezcla para la produccion de dicho manguito.
EP02770003A EP1543897B1 (fr) 2002-09-09 2002-09-09 Manchon, son procede de fabrication et melange pour la production dudit manchon
AT02770003T ATE365086T1 (de) 2002-09-09 2002-09-09 Hülse, herstellungsverfahren derselben und gemisch zur herstellung derselben
PT02770003T PT1543897E (pt) 2002-09-09 2002-09-09 ''manga, respectivo método de fabrico e mistura para a sua produção''
DK02770003T DK1543897T3 (da) 2002-09-09 2002-09-09 Hylster, fremgangsmåde til fremstilling deraf og blanding til fremstilling af dette
ES02770003T ES2288560T3 (es) 2002-09-09 2002-09-09 Manguito, procedimiento para su fabricacion y mezcla para la produccion de dicho manguito.
SI200230596T SI1543897T1 (sl) 2002-09-09 2002-09-09 Tulec, postopek izdelave in meĺ anica za proizvodnjo le-tega
JP2004533521A JP4413780B2 (ja) 2002-09-09 2002-09-09 スリーブ、その製造方法、およびそれを製造するための混合物
BRPI0215879-5A BR0215879B1 (pt) 2002-09-09 2002-09-09 Processo para a produção por sopro e por cura em caixa fria de uma luva exotérmica para moldes de fundição e luva
PCT/ES2002/000422 WO2004022262A1 (fr) 2002-09-09 2002-09-09 Manchon, son procede de fabrication et melange pour la production dudit manchon
HK05110239A HK1078288A1 (en) 2002-09-09 2005-11-16 Sleeve, production method thereof and mixture for production of same
US12/026,697 US20080121363A1 (en) 2002-09-09 2008-02-06 Sleeve, procedure for the manufacture thereof and mixture for the production of said sleeve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2002/000422 WO2004022262A1 (fr) 2002-09-09 2002-09-09 Manchon, son procede de fabrication et melange pour la production dudit manchon

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/026,697 Continuation US20080121363A1 (en) 2002-09-09 2008-02-06 Sleeve, procedure for the manufacture thereof and mixture for the production of said sleeve

Publications (1)

Publication Number Publication Date
WO2004022262A1 true WO2004022262A1 (fr) 2004-03-18

Family

ID=31970554

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2002/000422 WO2004022262A1 (fr) 2002-09-09 2002-09-09 Manchon, son procede de fabrication et melange pour la production dudit manchon

Country Status (16)

Country Link
US (2) US20050247424A1 (fr)
EP (1) EP1543897B1 (fr)
JP (1) JP4413780B2 (fr)
CN (1) CN1305601C (fr)
AT (1) ATE365086T1 (fr)
AU (1) AU2002336110B2 (fr)
BR (1) BR0215879B1 (fr)
CA (1) CA2498240C (fr)
DE (1) DE60220841T2 (fr)
DK (1) DK1543897T3 (fr)
ES (1) ES2288560T3 (fr)
HK (1) HK1078288A1 (fr)
MX (1) MXPA05002612A (fr)
PT (1) PT1543897E (fr)
SI (1) SI1543897T1 (fr)
WO (1) WO2004022262A1 (fr)

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JP4749948B2 (ja) * 2006-06-23 2011-08-17 滲透工業株式会社 鋳造用発熱性造形品
DE102008058205A1 (de) * 2008-11-20 2010-07-22 AS Lüngen GmbH Formstoffmischung und Speiser für den Aluminiumguss
CN101549387B (zh) * 2009-05-18 2011-04-20 谢锦荣 一种圆柱形保温冒口的底座
ES2663280T3 (es) 2010-06-08 2018-04-11 Ask Chemicals España, S.A. Método de fabricación de una pieza metálica
CN102328027A (zh) * 2011-07-13 2012-01-25 中核苏阀横店机械有限公司 一种保温冒口防堵结构
CN103551515B (zh) * 2013-11-22 2015-05-13 哈尔滨理工大学 铸造用发热保温冒口及其制备方法
CN103586416B (zh) * 2013-11-28 2015-06-17 哈尔滨理工大学 一种无氟发热保温冒口的制备方法
RU2601721C2 (ru) * 2015-03-11 2016-11-10 федеральное государственное бюджетное образовательное учреждение высшего образования "Нижегородский государственный технический университет им. Р.Е. Алексеева" (НГТУ) Экзотермическая смесь для обогрева прибылей стальных и чугунных отливок
CN108296446B (zh) * 2018-01-25 2019-11-05 宁夏共享能源有限公司 持续发热的铸造保温冒口及其制备方法
USD872781S1 (en) 2018-04-13 2020-01-14 Foseco International Limited Breaker core
CN111889629A (zh) * 2020-08-14 2020-11-06 欧区爱铸造材料（中国）有限公司 一种铸造冒口加热用无氟高效发热剂
BR112023021300A2 (pt) 2021-04-16 2023-12-12 Foseco Int Composição para fabricar um artigo refratário, e, artigo refratário

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US5252526A (en) * 1988-03-30 1993-10-12 Indresco Inc. Insulating refractory
ES2143544T3 (es) * 1993-04-22 2000-05-16 Foseco Int Molde y metodo para la colada de metales y composiciones exotermicas refractarias ligadas para uso en los mismos.
ES2155001A1 (es) * 1996-07-18 2001-04-16 Kemen Recupac Sa Procedimiento para la fabricacion de manguitos y otros elementos de mazarotaje y alimentacion para moldes de fundicion, y formulacion para la obtencion de dichos manguitos y elementos.

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GB2260285B (en) * 1991-10-03 1994-10-12 Masamitsu Miki Riser sleeve with breaker core
JP3153991B2 (ja) * 1997-10-01 2001-04-09 正光 三木 押湯スリーブ
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US6360808B1 (en) * 2000-06-19 2002-03-26 Ashland Inc. Exothermic sleeve compositions containing aluminum dross
CN2465837Y (zh) * 2001-02-12 2001-12-19 盛天良 冒口颈盘

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Publication number Priority date Publication date Assignee Title
US5252526A (en) * 1988-03-30 1993-10-12 Indresco Inc. Insulating refractory
ES2143544T3 (es) * 1993-04-22 2000-05-16 Foseco Int Molde y metodo para la colada de metales y composiciones exotermicas refractarias ligadas para uso en los mismos.
ES2155001A1 (es) * 1996-07-18 2001-04-16 Kemen Recupac Sa Procedimiento para la fabricacion de manguitos y otros elementos de mazarotaje y alimentacion para moldes de fundicion, y formulacion para la obtencion de dichos manguitos y elementos.

Also Published As

Publication number Publication date
CN1668402A (zh) 2005-09-14
CN1305601C (zh) 2007-03-21
BR0215879B1 (pt) 2014-01-21
ATE365086T1 (de) 2007-07-15
DE60220841T2 (de) 2008-02-28
US20050247424A1 (en) 2005-11-10
HK1078288A1 (en) 2006-06-09
AU2002336110B2 (en) 2009-09-03
EP1543897B1 (fr) 2007-06-20
CA2498240C (fr) 2009-05-19
PT1543897E (pt) 2007-09-12
JP2005537935A (ja) 2005-12-15
BR0215879A (pt) 2005-08-02
CA2498240A1 (fr) 2004-03-18
EP1543897A1 (fr) 2005-06-22
JP4413780B2 (ja) 2010-02-10
DE60220841D1 (de) 2007-08-02
SI1543897T1 (sl) 2007-12-31
ES2288560T3 (es) 2008-01-16
MXPA05002612A (es) 2005-05-05
DK1543897T3 (da) 2007-09-24
US20080121363A1 (en) 2008-05-29
AU2002336110A1 (en) 2004-03-29

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