EP1095719B1 - Bindemittelsystem, Kernsandgemisch und Verfahren zu seiner Herstellung - Google Patents

Bindemittelsystem, Kernsandgemisch und Verfahren zu seiner Herstellung Download PDF

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Publication number
EP1095719B1
EP1095719B1 EP00122845A EP00122845A EP1095719B1 EP 1095719 B1 EP1095719 B1 EP 1095719B1 EP 00122845 A EP00122845 A EP 00122845A EP 00122845 A EP00122845 A EP 00122845A EP 1095719 B1 EP1095719 B1 EP 1095719B1
Authority
EP
European Patent Office
Prior art keywords
binder system
core
binder
sand
solution
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
EP00122845A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1095719A2 (de
EP1095719A3 (de
Inventor
Thomas Prof. Dr.-Ing. Steinhäuser
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.)
Hydro Aluminium Deutschland GmbH
Original Assignee
Hydro Aluminium Deutschland 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 Hydro Aluminium Deutschland GmbH filed Critical Hydro Aluminium Deutschland GmbH
Priority to SI200030829T priority Critical patent/SI1095719T1/sl
Publication of EP1095719A2 publication Critical patent/EP1095719A2/de
Publication of EP1095719A3 publication Critical patent/EP1095719A3/de
Application granted granted Critical
Publication of EP1095719B1 publication Critical patent/EP1095719B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/167—Mixtures of inorganic and organic binding agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
    • B22C1/186—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
    • B22C1/188—Alkali metal silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
    • B22C1/205—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of organic silicon or metal compounds, other organometallic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C13/00—Moulding machines for making moulds or cores of particular shapes
    • B22C13/12—Moulding machines for making moulds or cores of particular shapes for cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
    • B22C15/245—Blowing tubes

Definitions

  • the invention relates to a waterglass-based binder system consisting of an aqueous alkali metal silicate solution of the general composition: xSiO 2 .yM 2 O .zH 2 O, where for M the alkali ions are Li + , K + or Na + and a hygroscopic base which is in the ratio 1: 4 to 1: 6 is added, wherein the module Na 2 O / SiO 2 is 2.5 to 3.5 at a solids content of 20 to 40% by mass and wherein as hygroscopic base 30% sodium hydroxide solution in an aqueous Solution is used, as well as a core sand mixture and a method for its preparation.
  • binder contained in the binder system is used for Production of core moldings for foundry purposes.
  • binder are part of a molding material, which under certain Prerequisites, such as moistening or swelling and Silicate formation, the bond between the individual Produces sand grains.
  • Prerequisites such as moistening or swelling and Silicate formation, the bond between the individual Produces sand grains.
  • Ceramic binders are also used on chemical binders Water glass base or resin-based used, the react chemically with each other and get involved solidify.
  • the known binders are either insufficient stable or show unwanted side effects or Waste products that endanger the environment. As a favorable compromise have therefore water glass bound Formed materials that are solid via dehydration Form phases and solidify. It is not always easy to control the solidification processes, that they first enter the core-box. Especially By using modern core forming machines, the Danger of early solidification of the molding sand. As a result, the required good flow properties of sand as it flows into the core canister reached.
  • DE-OS 15 08 634 (Diamond Shamrock Corp.) discloses a binder for raw materials for the production of self-hardening casting molds and casting cores.
  • the binder consists of sodium silicate with a molar ratio of Na 2 O to SiO 2 of 1: 1, 5 to 1: 3 and potassium hydroxide, which is added in the form of an aqueous solution.
  • potassium hydroxide which is added in the form of an aqueous solution.
  • hydrogen is released under exothermic reaction, wherein the setting time is shortened by the addition of potassium hydroxide.
  • a heat input from the outside is not provided, with another silicon-containing material, such as ferrosilicon, must be added, but the grain size should be below 0.15 mm.
  • the fast setting is therefore possible only under certain limited conditions and the presence of several components that need to be precisely controlled.
  • 1.0 to 2.0% by mass of sodium hydroxide solution is added to a molding material mixture in order to improve the processability in the wet casting process of waterglass-bentonite or waterglass-clay mixtures.
  • the molding material consists of 2.0 to 5.0% by mass of sodium silicate from 0.5 to 1.0% by mass of starch and 2.0 to 4.0% by mass of clay, the remainder quartz sand.
  • the molding compound is applied to the model, backfilled with filling sand and the finished green form chemically or thermally solidified. These are therefore green sand molds which are not suitable for machine core production.
  • test specimens prepared therefrom are cured by esterification during a drying of 1 hour at 200 ° C and then subjected to a pressure test, giving a maximum strength of 500 to 600 N / m 2 .
  • This maximum value was achieved only with a molding material in which the surface-active component does not exceed a total amount of 0.1%, based on the total amount of the material.
  • From DE 29 09 107 is a method in production of bodies of granular and / or fibrous material with sodium silicate or potassium silicate as a binder known, wherein the mixture of the material surfactant is added.
  • the Surfactant may consist of a surfactant, silicone oil or a silicone emulsion in one Amount of at most 0.1% by mass, on the amount by weight Material calculated.
  • GB 857 132 discloses a composition for Production of foundry cores and molds, which 90% by weight Sand and 10 wt.% Binder contains.
  • the binder is an aqueous dispersion of an alkali metal silicate with a silicon to alkali metal oxide ratio of at least 0.5: 1.
  • the binder contains in one 1 to 15% by weight of an organosilicon additive, which averages between 0.9 to 1.7 monovalent aliphatic hydrocarbon radicals per silicon atom contains.
  • Object of the present invention is a Binder system for machine core production through core shooting / core bubbles that develop slightly dry (dry, powdered State) and thereby improved Has flowability and shortened setting time.
  • the core sliding machine consists of a vertical arranged housing A, to which a horizontal Air inlet B is flanged.
  • the air intake is over a large air inlet valve. 1 controlled, with an increased air pressure in the air reservoir tank 5 is pending.
  • the Air inlet valve 1 When opening the Air inlet valve 1, the air pressure enters the Machine room 10 of the housing A, in which a slotted Sand cylinder 6 is arranged vertically.
  • the sand cylinder 6 is connected to a sand reservoir 3, over a slide 4 can be emptied.
  • the core sand mixture of the invention contains a binder amount of 1.0 to 2.5% based on the total amount of granular solid.
  • the granular solid is silica sand with a degree of granulation of 0.1 to 0.3 mm.
  • the amount of the added sodium hydroxide in the binder system is 0.01 to 0.6 mass% and the silicone oil is contained therein at 0.1 to 0.5 mass%.
  • a compressive strength test is carried out with the binder according to the invention.
  • Compressive strength average of 5 tests 1060 N / cm 2

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Mold Materials And Core Materials (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
EP00122845A 1999-10-26 2000-10-20 Bindemittelsystem, Kernsandgemisch und Verfahren zu seiner Herstellung Expired - Lifetime EP1095719B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200030829T SI1095719T1 (sl) 1999-10-26 2000-10-20 Vezivni sistem, mesanica jedrnega peska in postopek za njegovo pripravo

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19951622A DE19951622A1 (de) 1999-10-26 1999-10-26 Bindemittelsystem auf Wasserglasbasis
DE19951622 1999-10-26

Publications (3)

Publication Number Publication Date
EP1095719A2 EP1095719A2 (de) 2001-05-02
EP1095719A3 EP1095719A3 (de) 2001-06-20
EP1095719B1 true EP1095719B1 (de) 2005-12-28

Family

ID=7926971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00122845A Expired - Lifetime EP1095719B1 (de) 1999-10-26 2000-10-20 Bindemittelsystem, Kernsandgemisch und Verfahren zu seiner Herstellung

Country Status (14)

Country Link
US (1) US7022178B1 (cs)
EP (1) EP1095719B1 (cs)
AT (1) ATE314168T1 (cs)
BR (1) BR0015090B1 (cs)
CZ (1) CZ297087B6 (cs)
DE (4) DE29925011U1 (cs)
ES (1) ES2255932T3 (cs)
HU (1) HU225725B1 (cs)
MX (1) MXPA02004239A (cs)
NO (1) NO334154B1 (cs)
SI (1) SI1095719T1 (cs)
SK (1) SK286218B6 (cs)
TR (1) TR200201117T2 (cs)
WO (1) WO2001030517A2 (cs)

Cited By (1)

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DE102007027577A1 (de) 2007-06-12 2008-12-18 Minelco Gmbh Formstoffmischung, Formling für Gießereizwecke und Verfahren zur Herstellung eines Formlings

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DE102004042535B4 (de) * 2004-09-02 2019-05-29 Ask Chemicals Gmbh Formstoffmischung zur Herstellung von Gießformen für die Metallverarbeitung, Verfahren und Verwendung
DE102006011530A1 (de) * 2006-03-10 2007-09-13 Minelco Gmbh Form oder Formling, Gießerei-Formstoffgemisch und Verfahren zu seiner Herstellung
DE102006049379A1 (de) 2006-10-19 2008-04-24 Ashland-Südchemie-Kernfest GmbH Phosphorhaltige Formstoffmischung zur Herstellung von Giessformen für die Metallverarbeitung
CA2666760C (en) * 2006-10-19 2014-10-28 Jens Mueller Molding material mixture containing carbohydrates
DE102007051850B4 (de) * 2007-10-30 2025-08-28 Ask Chemicals Gmbh Verfahren zur Herstellung von Gießformen für die Metallverarbeitung unter Verwendung einer Formstoffmischung mit verbesserter Fliessfähigkeit
DE102008041217A1 (de) * 2008-08-13 2010-02-18 Volkswagen Ag Formstoffbinder für schüttbare Formmassen und Verfahren zum Herstellen von Kerneinsätzen für Gussformen
EP2163328A1 (de) 2008-09-05 2010-03-17 Minelco GmbH Mit Wasserglas beschichteter und/oder vermischter Kern- oder Formsand mit einem Wassergehalt im Bereich von >= etwa 0,25 Gew.-% bis etwa 0,9 Gew.-%
MX339544B (es) * 2008-12-18 2016-05-31 Tenedora Nemak Sa De Cv Metodo y composicion de aglomerante para fabricacion de moldes y/o corazones de arena para fundicion.
KR101199111B1 (ko) * 2009-10-30 2012-11-09 현대자동차주식회사 주물용 중자 재료 혼합물, 주물용 중자 제조방법 및 이를 이용하여 제조된 주물용 중자
DE102011114626A1 (de) 2011-09-30 2013-04-04 Ask Chemicals Gmbh Beschichtungsmassen für anorganische Giessformen und Kerne und deren Verwendung
DE102011115024A1 (de) 2011-10-07 2013-04-11 Ask Chemicals Gmbh Beschichtungsmassen für anorganische Gießformen und Kerne umfassend Ameisensäureester und deren Verwendung
DE102011115025A1 (de) 2011-10-07 2013-04-11 Ask Chemicals Gmbh Beschichtungsmassen für anorganische Gießformen und Kerne enthaltend Salze und deren Verwendung
CN104428082A (zh) * 2012-04-10 2015-03-18 埃米尔·米勒有限责任公司 盐基型芯、其制备方法及其应用
US10092947B2 (en) 2013-10-19 2018-10-09 Peak Deutschland Gmbh Method for producing lost cores or molded parts for the production of cast parts
CN104907485B (zh) * 2015-06-16 2018-01-12 沈阳汇亚通铸造材料有限责任公司 一种温芯盒用无机黏结剂及其制备方法和应用
ITUA20162227A1 (it) * 2016-04-01 2017-10-01 Cavenaghi S P A Sistema legante inorganico per fonderia
CZ306766B6 (cs) * 2016-06-03 2017-06-21 Slévárna HEUNISCH Brno s.r.o. Modifikovaná vstřelovací trubice pro jádrařské vstřelovací stroje
CN106424595B (zh) * 2016-11-15 2018-10-09 盐城市汉铜智能铸造设备有限公司 上下射砂全自动砂型铸造造型机铜套安装结构
CN106424598B (zh) * 2016-11-15 2018-10-09 盐城市汉铜智能铸造设备有限公司 上下射砂全自动砂型铸造造型机储砂筒结构
DE102017107655A1 (de) 2017-01-04 2018-07-05 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Verwendung einer Säure enthaltenden Schlichtezusammensetzung in der Gießereiindustrie
DE102017107657A1 (de) 2017-01-04 2018-07-05 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Schlichtezusammensetzung, umfassend organische Esterverbindungen und partikuläres, amorphes Siliziumdioxid, zur Verwendung in der Gießereiindustrie
DE102017107658A1 (de) 2017-01-04 2018-07-05 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Schlichtezusammensetzung für die Gießereiindustrie, enthaltend partikuläres, amorphes Siliziumdioxid und Säure
DE102017107531A1 (de) 2017-04-07 2018-10-11 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Verfahren zur Herstellung von Gießformen, Kernen und daraus regenerierten Formgrundstoffen
CN110405135A (zh) * 2019-08-19 2019-11-05 陈星利 一种铸造用新型改性水玻璃及铸造用新型改性水玻璃砂
CN110496935B (zh) * 2019-09-23 2021-05-25 湖北工业大学 用于温芯盒工艺磷酸盐粘结剂的配套液体固化剂及其使用方法
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007027577A1 (de) 2007-06-12 2008-12-18 Minelco Gmbh Formstoffmischung, Formling für Gießereizwecke und Verfahren zur Herstellung eines Formlings
EP2014392A2 (de) 2007-06-12 2009-01-14 Minelco GmbH Formstoffmischung, Formling für Giessereizwecke und Verfahren zur Herstellung eines Formlings

Also Published As

Publication number Publication date
WO2001030517A3 (de) 2001-12-27
NO334154B1 (no) 2013-12-23
EP1095719A2 (de) 2001-05-02
NO20021961D0 (no) 2002-04-25
ATE314168T1 (de) 2006-01-15
EP1095719A3 (de) 2001-06-20
CZ297087B6 (cs) 2006-09-13
US7022178B1 (en) 2006-04-04
HU225725B1 (en) 2007-07-30
DE50011962D1 (de) 2006-02-02
SK5722002A3 (en) 2003-03-04
MXPA02004239A (es) 2003-10-06
ES2255932T3 (es) 2006-07-16
BR0015090B1 (pt) 2011-01-25
HUP0203178A2 (en) 2003-05-28
DE29925010U1 (de) 2008-09-04
CZ20021415A3 (cs) 2003-01-15
BR0015090A (pt) 2002-06-11
DE29925011U1 (de) 2008-10-02
SI1095719T1 (sl) 2006-08-31
SK286218B6 (sk) 2008-05-06
DE19951622A1 (de) 2001-05-23
WO2001030517A2 (de) 2001-05-03
NO20021961L (no) 2002-04-25
TR200201117T2 (tr) 2002-12-23

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