DE102016223619A1 - Sizing for application to the porous surface of molds and / or cores for metal casting - Google Patents
Sizing for application to the porous surface of molds and / or cores for metal casting Download PDFInfo
- Publication number
- DE102016223619A1 DE102016223619A1 DE102016223619.9A DE102016223619A DE102016223619A1 DE 102016223619 A1 DE102016223619 A1 DE 102016223619A1 DE 102016223619 A DE102016223619 A DE 102016223619A DE 102016223619 A1 DE102016223619 A1 DE 102016223619A1
- Authority
- DE
- Germany
- Prior art keywords
- airgel
- additive
- sizing
- size
- cores
- 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.)
- Pending
Links
- 238000004513 sizing Methods 0.000 title claims abstract description 13
- 238000005058 metal casting Methods 0.000 title claims abstract description 6
- 239000000654 additive Substances 0.000 claims abstract description 12
- 230000000996 additive effect Effects 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims abstract 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- DGXAGETVRDOQFP-UHFFFAOYSA-N 2,6-dihydroxybenzaldehyde Chemical compound OC1=CC=CC(O)=C1C=O DGXAGETVRDOQFP-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000002270 dispersing agent Substances 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 150000002927 oxygen compounds Chemical class 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 2
- 150000003464 sulfur compounds Chemical class 0.000 claims description 2
- 238000009736 wetting Methods 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 11
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 239000004964 aerogel Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 7
- 229910001141 Ductile iron Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 239000004966 Carbon aerogel Substances 0.000 description 1
- 239000004965 Silica aerogel Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/14—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for separating the pattern from the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- 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
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/04—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for protection of the casting, e.g. against decarbonisation
-
- 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
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/12—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for manufacturing permanent moulds or cores
Abstract
Geoffenbart ist eine Schlichte, die zum Auftragen auf die poröse Oberfläche von Formen und/oder Kernen für den Metallguss, insbesondere für den Eisen- und Stahlguss dient und die ein Aerogeladditiv enthält.A sizing agent is disclosed which is for application to the porous surface of molds and / or cores for metal casting, in particular for iron and steel casting, and which contains an airgel additive.
Description
Die Erfindung betrifft eine Schlichte, die zum Auftragen auf die poröse Oberfläche von Formen und/oder Kernen für den Metallguss, insbesondere für den Eisen- und Stahlguss dient. Insbesondere werden Kerne mit einer Schlichte überzogen. The invention relates to a size, which serves for application to the porous surface of molds and / or cores for metal casting, in particular for iron and steel casting. In particular, cores are coated with a size.
Die Zusammensetzung von Schlichten sowie die Art und der Zweck Ihrer Nutzung als Überzugsstoffe von Formen und Kernen in der Gießereitechnik ist zum Beispiel ausführlich in der
Der Erfindung liegt die Aufgabe zugrunde, eine Schlichte zu schaffen, die zum Auftragen auf die poröse Oberfläche von Formen und/oder Kernen für den Metallguss dient und bei deren Anwendung und Verwendung der Gießprozess und die Ergebnisse des Gießprozesses verbessert sind. The invention has for its object to provide a sizing, which is used for application to the porous surface of molds and / or cores for metal casting and their application and use of the casting process and the results of the casting process are improved.
Diese Aufgabe wird durch eine Schlichte gemäß Patentanspruch 1 gelöst. This object is achieved by a size according to claim 1.
Gemäß der Erfindung enthält also eine Schlichte, die zum Auftragen auf die poröse Oberfläche von Formen und/oder Kernen für den Metallguss, insbesondere den Eisen- und Stahlguss dient, ein Aerogeladditiv. According to the invention, therefore, a size which is used for application to the porous surface of molds and / or cores for metal casting, in particular iron and cast steel, contains an airgel additive.
Aerogele, die es als hydrophile und als hydrophobe Aerogele gibt, sind hochporöse Festkörper, die in ihrem Volumen zu über 95 Prozent aus Poren bestehen. Die Wärmeleitfähigkeit von Aerogelen ist wegen der hohen Porosität sehr gering, so dass die erfindungsgemäße Schlichte aufgrund des zugegebenen Aerogels sehr gut wärmeisolierend wirkt. Dadurch wird die Bildung von Gasen innerhalb der Form beziehungsweise innerhalb des Kerns reduziert. Aerogels, which exist as hydrophilic and hydrophobic aerogels, are highly porous solids with more than 95% pores in their volume. The thermal conductivity of aerogels is very low due to the high porosity, so that the size of the invention due to the added airgel acts very good heat insulating. This reduces the formation of gases within the mold or within the core.
Eine solche Gasbildung kann zu Gussfehlern führen. Aerogele können außerdem wegen ihrer hohen Porosität in hohem Maße Gase adsorbieren. Durch das in der Schlichte enthaltene Aerogel werden also beim Abguss entstehende Gießgase adsorbiert. Dadurch kann der Anteil der Gase, der in die Umwelt abgegeben wird, beziehungsweise der bisher betriebene Aufwand für Absaugung und Gasreinigung, durch den eine Abgabe der Gase in die Umwelt verhindert werden soll, reduziert werden. die Umweltbelastung kann also reduziert werden. Emissionsobergrenzen lassen sich leichter einhalten. Such gas formation can lead to casting defects. Aerogels can also adsorb gases to a high degree because of their high porosity. The aerogels contained in the sizing thus adsorb casting gases produced during the casting. Thereby, the proportion of gases that is released into the environment, or the previously operated expenses for extraction and gas purification, by which a release of the gases is to be prevented in the environment, can be reduced. the environmental impact can therefore be reduced. Emission ceilings are easier to comply with.
Der Einsatz von Aerogelen in der Schlichte führt auch zu einer Reduzierung des Reinigungsaufwandes und der Nachbearbeitung an den Gussteilen nach dem Abguss. Durch das in der Schlichte enthaltene Aerogel wird die Benetzbarkeit der Form beziehungsweise des Kerns reduziert. Dadurch die Entkernung des Gussteils erleichtert. The use of aerogels in the size also leads to a reduction of the cleaning effort and the post-processing of the castings after casting. The airgel contained in the size reduces the wettability of the mold or of the core. This facilitates the gut removal of the casting.
Vorteilhafterweise ist das Aerogeladditiv der Schlichte als Granulat beziehungsweise Pulver zugegeben. Dazu ist vorzugsweise ein geeignetes Dispergierungsmittel hinzuzugeben, um eine Benetzung des Aerogels mit der Schlichte zu fördern. Advantageously, the airgel additive is added to the size as granules or powder. To this end, it is preferable to add a suitable dispersing agent to promote wetting of the airgel with the size.
Die Porengröße des Aerogels ist vorzugsweise so ausgebildet ist, dass magnesiumreagierende Elemente oder magnesiumreagierende Verbindungen wie Schwefelverbindungen und Sauerstoffverbindungen von dem Aerogel adsorbiert werden können. Das führt zu einem verringerten Magnesiumverbrauch an der Oberfläche der Form oder des Kerns und damit zu einer Verbesserung der Gusshaut insbesondere beim Kugelgraphitguss, auch Sphäroguss genannt. Beim Sphäroguss auftretende Graphitentartungen sind reduziert. The pore size of the airgel is preferably such that magnesium-responsive elements or magnesium-reactive compounds such as sulfur compounds and oxygen compounds can be adsorbed by the airgel. This leads to a reduced magnesium consumption at the surface of the mold or the core and thus to an improvement of the casting skin especially in nodular cast iron, also called ductile iron. Graphite decays occurring in ductile iron are reduced.
Vorzugsweise beträgt die zugegebene Menge an Aerogel 2 Volumenprozent bis 40 Volumenprozent der Schlichte. Preferably, the amount of airgel added is from 2% to 40% by volume of the size.
Als Additiv kommen insbesondere Kohlenstoff-Aerogele, Resorcin-Formaldehyd-Aerogele, Silica-Aerogele oder Siliziumoxidcarbid-Aerogele oder Zirkonoxid-Aerogele oder Kombinationen dieser Arten von Aerogelen in Betracht. Particularly suitable as additive are carbon aerogels, resorcinol-formaldehyde aerogels, silica aerogels or silicon oxide carbide aerogels or zirconium oxide aerogels or combinations of these types of aerogels.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102009032668 [0002] DE 102009032668 [0002]
Claims (9)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CZ2020-37143U CZ34450U1 (en) | 2015-12-15 | 2016-12-06 | Sizing for applying to the porous surface of moulds and / or cores for metal casting |
| CZ2016-764A CZ2016764A3 (en) | 2015-12-15 | 2016-12-06 | A sizing medium for application to porous mould surfaces and/or cores for metal casting |
| CN201611154576.9A CN106881446B (en) | 2015-12-15 | 2016-12-14 | Coating for application to porous surfaces of molds and/or cores for metal castings |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015225229.9 | 2015-12-15 | ||
| DE102015225229 | 2015-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102016223619A1 true DE102016223619A1 (en) | 2017-06-22 |
Family
ID=58994723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102016223619.9A Pending DE102016223619A1 (en) | 2015-12-15 | 2016-11-29 | Sizing for application to the porous surface of molds and / or cores for metal casting |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN106881446B (en) |
| CZ (2) | CZ34450U1 (en) |
| DE (1) | DE102016223619A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961571A (en) * | 2020-01-07 | 2020-04-07 | 大连远景铸造有限公司 | Casting surface air-tight hole technology |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009032668A1 (en) | 2009-07-09 | 2011-01-13 | Hüttenes-Albertus Chemische Werke GmbH | Sizing for the production of mold coatings |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2666685A (en) * | 1951-07-25 | 1954-01-19 | Dow Corning | Mold release emulsion |
| DE19911847A1 (en) * | 1999-03-17 | 2000-09-28 | Deutsch Zentr Luft & Raumfahrt | Fine and molded casting in plastic / carbon aerogels |
| DE102006003198A1 (en) * | 2006-01-24 | 2007-07-26 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Mechanically and thermally stable core, used for light metal- and/or investment casting, comprises hydrophilic aerogel granulates, sand and binding agent |
| EP2294147A2 (en) * | 2008-06-30 | 2011-03-16 | Stc.Unm | Durable polymer-aerogel based superhydrophobic coatings: a composite material |
| DE102008056842A1 (en) * | 2008-11-12 | 2010-05-20 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Foundry cores with improved gutting properties II |
| CN102923723A (en) * | 2012-10-30 | 2013-02-13 | 陕西盟创纳米新型材料股份有限公司 | Novel aerosol material and preparation method, application and application structure thereof |
| CN105132732A (en) * | 2015-09-28 | 2015-12-09 | 太原科技大学 | Preparation method for foamed aluminum with adjustable pore structure |
-
2016
- 2016-11-29 DE DE102016223619.9A patent/DE102016223619A1/en active Pending
- 2016-12-06 CZ CZ2020-37143U patent/CZ34450U1/en active Protection Beyond IP Right Term
- 2016-12-06 CZ CZ2016-764A patent/CZ2016764A3/en unknown
- 2016-12-14 CN CN201611154576.9A patent/CN106881446B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009032668A1 (en) | 2009-07-09 | 2011-01-13 | Hüttenes-Albertus Chemische Werke GmbH | Sizing for the production of mold coatings |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ34450U1 (en) | 2020-10-13 |
| CN106881446A (en) | 2017-06-23 |
| CZ2016764A3 (en) | 2018-05-23 |
| CN106881446B (en) | 2021-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R012 | Request for examination validly filed |