DE10312782B4 - Water-soluble salt cores and process for producing water-soluble salt cores - Google Patents
Water-soluble salt cores and process for producing water-soluble salt cores Download PDFInfo
- Publication number
- DE10312782B4 DE10312782B4 DE2003112782 DE10312782A DE10312782B4 DE 10312782 B4 DE10312782 B4 DE 10312782B4 DE 2003112782 DE2003112782 DE 2003112782 DE 10312782 A DE10312782 A DE 10312782A DE 10312782 B4 DE10312782 B4 DE 10312782B4
- Authority
- DE
- Germany
- Prior art keywords
- water
- soluble salt
- contain
- salt cores
- soluble
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/105—Salt cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Seasonings (AREA)
Abstract
Wasserlösliche Salzkerne, die durch Verdichten von wasserlöslichen Salzen unter Druck und anschließendem Sintern hergestellt werden, dadurch gekennzeichnet, dass sie einen Anteil von 0,5 bis zu 15 Gew.-% eines Porosität erzeugenden Zusatzes wie Zucker, Weizengrieß oder Haferkleie oder eine Kombination wenigstens zweier dieser Stoffe enthalten.Water-soluble salt cores, by condensing water-soluble Salting under pressure and then Are made sintered, characterized in that they have a Proportion of 0.5 to 15 wt .-% of a porosity-generating additive such as Sugar, wheat semolina or Oat bran or a combination of at least two of these substances contain.
Description
Die vorliegende Erfindung betrifft wasserlösliche Salzkerne und Verfahren zur Herstellung wasserlöslicher Salzkerne.The The present invention relates to water-soluble salt cores and processes for producing water-soluble Salt cores.
Solche Salzkerne für Gießereizwecke, die nach dem Guss von Teilen ausgewaschen werden, sind lange bekannt, wie auch Versuche, diese durch Beimischung von Zusatzstoffen zu optimieren. So wurde in der DE-C-14 83 641 gefunden, dass eine Zugabe von bis zu 10% Borax, Magnesiumoxid oder Talkum die Belastbarkeit von Salzkernen aus NaCl und/oder KCl verbessert. Die DE-C-19 24 991 schlägt zur weiteren Erhöhung der Druck- und Biegefestigkeit den Zusatz von Wasserglas vor. Auch wurden weitere Salze vorgeschlagen, wie zum Beispiel ein alkalisches Metallhalogenid in der US-A-33 56 129. In jüngerer Zeit gab es Versuche die Oberfläche von Salzkernen möglichst glatt und porenfrei zu gestalten, wie durch den Einsatz von keramischen Zusätzen wie in der PCT-WO-98/00251 oder ähnlich von Aluminiumoxid in der japanischen Patentoffenlegung 60118350. So können glatte Oberflächen mit einem RZ < 40 erzielt werden. Aus der DE-A-19 34 787 ist es bekannt für Salzkerne neben Wasserglas einen Kunstharzbinder aus Furan- oder Phenolharzen zu verwenden. Dieser Kunstharzbinder wird vor dem Gießen durch Erhitzen karbonisiert.Such Salt cores for Foundry purposes, which are washed out after the casting of parts, have long been known as well as attempts to add them by adding additives optimize. It was found in DE-C-14 83 641 that an addition of up to 10% borax, magnesium oxide or talcum loading capacity of salt cores of NaCl and / or KCl improved. DE-C-19 24 991 hits to further increase the compressive and flexural strength before the addition of water glass. Also For example, other salts have been suggested, such as an alkaline one Metal Halide in US Pat. No. 3,356,129. There have been recent attempts the surface of Salt cores as possible smooth and non-porous, as through the use of ceramic additives as in PCT WO 98/00251 or similar of Alumina in Japanese Patent Laid-Open No. 60118350. So can smooth surfaces with a RZ <40 be achieved. From DE-A-19 34 787 it is known for Salt cores next to water glass a resin binder from furan or To use phenolic resins. This resin binder will go through before pouring Heating carbonized.
Es
hat sich aber herausgestellt, dass es bei sehr glatten Oberflächen beim
Umlaufen des Salzkerns
Aufgabe der vorliegenden Erfindung ist es, die geschilderten Probleme durch das Entstehen eines Oxydkeils und damit die aufwendigen Fertigungsverfahren zu vermeiden und einen Salzkern mit einer kontrolliert einstellbaren Porosität zu schaffen, bei dem es nicht zu einem Festigkeitsverlust kommt.task The present invention is the problems described by the emergence of a Oxydkeils and thus the complex manufacturing process to avoid and a salt core with a controlled adjustable porosity which does not lead to a loss of strength.
Diese Aufgabe wird mit den in Anspruch 1 genannten Merkmalen gelöst. Vorteilhafte Ausführungen und Weiterentwicklungen der Erfindung und insbesondere ein erfindungsgemäßes Verfahren sind in den weiteren Ansprüchen umfasst.These The object is achieved with the features mentioned in claim 1. advantageous versions and further developments of the invention and in particular a method according to the invention are in the further claims includes.
Erfindungsgemäß sind wasserlösliche Salzkerne, die durch Verdichten von wasserlöslichen Salzen unter Druck und anschließendem Sintern hergestellt werden, dadurch gekennzeichnet, dass sie einen Anteil von 0,5 bis zu 15 Gew.-% eines Porosität erzeugenden Zusatzes wie Zucker, Weizengrieß oder Haferkleie oder eine Kombination wenigstens zweier dieser Stoffe enthalten.According to the invention, water-soluble salt cores, by condensing water-soluble Salting under pressure and then Are made sintered, characterized in that they have a Proportion of 0.5 to 15 wt .-% of a porosity-generating additive such as Sugar, wheat semolina or Oat bran or a combination of at least two of these substances contain.
Bei Verwendung von Zucker weist dieser vorzugsweise eine Korngröße von 0,2 bis 1,6 mm auf.at Use of sugar, this preferably has a grain size of 0.2 up to 1.6 mm.
Die erfindungsgemäßen wasserlöslichen Salzkerne können weiter einen Anteil von jeweils 0 bis 10% weiterer bekannter Zusätze wie Borax, Magnesium, Graphit und/oder Talkum enthalten.The water-soluble salt cores according to the invention can in each case a share of 0 to 10% of further known additives such as Borax, magnesium, graphite and / or talc.
Ein erfindungsgemäßes Verfahren zur Herstellung wasserlöslicher Salzkerne ist gekennzeichnet durch die Schritte:
- – Mischen wasserlöslicher Salze wie NaCl oder KCl mit einem Anteil von 0,5 bis zu 15 Gew.-% eines Porosität erzeugenden Zusatzes wie Zucker, Weizengrieß oder Haferkleie oder eine Kombination wenigstens zweier dieser Stoffe und jeweils 0 bis 10 Gew.-% Borax, Magnesium, Graphit oder Talkum in einer Mischtrommel,
- – Einfüllen der Mischung in eine Form,
- – Pressen der Mischung in der Form mit einem Pressdruck von zwischen 1.500 und 2.500 KN/cm2,
- – Sintern des gepressten Salzkerns bei einer Temperatur von 500 bis 740°C während 1,5 bis 2,5 Stunden,
- – Entnehmen des Salzkerns und Abkühlen.
- Mixing water-soluble salts such as NaCl or KCl in a proportion of 0.5 to 15% by weight of a porosity-generating additive such as sugar, wheat semolina or oat bran or a combination of at least two of these substances and in each case 0 to 10% by weight borax, Magnesium, graphite or talcum in a mixing drum,
- - filling the mixture into a mold,
- Pressing the mixture in the mold with a pressure of between 1,500 and 2,500 KN / cm 2 ,
- Sintering the pressed salt core at a temperature of 500 to 740 ° C for 1.5 to 2.5 hours,
- - Remove the salt core and cool down.
Das
Ergebnis ist ein Salzkern
Claims (7)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003112782 DE10312782B4 (en) | 2003-03-21 | 2003-03-21 | Water-soluble salt cores and process for producing water-soluble salt cores |
PCT/DE2004/000596 WO2004082866A2 (en) | 2003-03-21 | 2004-03-22 | Water-soluble salt cores and method for producing water-soluble salt cores |
DE112004000975T DE112004000975D2 (en) | 2003-03-21 | 2004-03-22 | Water-soluble salt cores and process for producing water-soluble salt cores |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003112782 DE10312782B4 (en) | 2003-03-21 | 2003-03-21 | Water-soluble salt cores and process for producing water-soluble salt cores |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10312782A1 DE10312782A1 (en) | 2004-10-07 |
DE10312782B4 true DE10312782B4 (en) | 2005-05-04 |
Family
ID=32946058
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003112782 Expired - Fee Related DE10312782B4 (en) | 2003-03-21 | 2003-03-21 | Water-soluble salt cores and process for producing water-soluble salt cores |
DE112004000975T Expired - Fee Related DE112004000975D2 (en) | 2003-03-21 | 2004-03-22 | Water-soluble salt cores and process for producing water-soluble salt cores |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE112004000975T Expired - Fee Related DE112004000975D2 (en) | 2003-03-21 | 2004-03-22 | Water-soluble salt cores and process for producing water-soluble salt cores |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE10312782B4 (en) |
WO (1) | WO2004082866A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006010449A2 (en) * | 2004-07-23 | 2006-02-02 | Ceramtec Ag Innovative Ceramic Engineering | Ceramic cores |
DE102005018614B4 (en) * | 2005-04-21 | 2016-07-28 | Emil Müller GmbH | Process for the preparation of water-soluble salt cores |
JP4950998B2 (en) * | 2005-09-30 | 2012-06-13 | セラムテック アクチエンゲゼルシャフト イノヴェイティヴ セラミック エンジニアリング | Core and core manufacturing method |
DE102006031532B3 (en) * | 2006-07-07 | 2008-04-17 | Emil Müller GmbH | Water-soluble salt core with functional component |
DE102006031531A1 (en) | 2006-07-07 | 2008-01-10 | Emil Müller GmbH | Salt cores for plastic (injection) casting |
JP5874735B2 (en) * | 2011-10-19 | 2016-03-02 | スズキ株式会社 | Casting core, manufacturing method thereof and casting method using the core |
WO2018138210A1 (en) | 2017-01-25 | 2018-08-02 | Technische Universität Bergakademie Freiberg | Method for producing high temperature-resistant objects with improved thermomechanical properties |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3356129A (en) * | 1964-06-30 | 1967-12-05 | Schmidt Gmbh Karl | Process of casting metals by use of water-soluble salt cores |
DE1934787A1 (en) * | 1969-07-09 | 1971-01-14 | Schmidt Gmbh Karl | Salt core for foundry purposes |
DE1483641C3 (en) * | 1965-06-12 | 1973-10-11 | Karl Schmidt Gmbh, 7107 Neckarsulm | Water-soluble salt cores |
DE1924991C3 (en) * | 1969-05-16 | 1978-06-22 | Karl Schmidt Gmbh, 7107 Neckarsulm | Water-soluble salt cores |
JPS60118350A (en) * | 1983-11-30 | 1985-06-25 | Izumi Jidosha Kogyo Kk | Method for forming cavity in high-pressure casting |
US5248552A (en) * | 1990-07-11 | 1993-09-28 | Advanced Plastics Partnership | Molding core |
WO1998000251A1 (en) * | 1996-07-01 | 1998-01-08 | Alyn Corporation | Die casting employing soluble core |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1252716A (en) * | 1959-12-21 | 1961-02-03 | Fonderie De Prec | Advanced molding of fusible materials |
DE2917208A1 (en) * | 1979-04-27 | 1980-12-04 | Alcan Aluminiumwerke | CASTING CORE FOR GENERATING HARD ACCESSIBLE CAVES IN CASTING PIECES, AND METHOD FOR THE PRODUCTION THEREOF |
-
2003
- 2003-03-21 DE DE2003112782 patent/DE10312782B4/en not_active Expired - Fee Related
-
2004
- 2004-03-22 DE DE112004000975T patent/DE112004000975D2/en not_active Expired - Fee Related
- 2004-03-22 WO PCT/DE2004/000596 patent/WO2004082866A2/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3356129A (en) * | 1964-06-30 | 1967-12-05 | Schmidt Gmbh Karl | Process of casting metals by use of water-soluble salt cores |
DE1483641C3 (en) * | 1965-06-12 | 1973-10-11 | Karl Schmidt Gmbh, 7107 Neckarsulm | Water-soluble salt cores |
DE1924991C3 (en) * | 1969-05-16 | 1978-06-22 | Karl Schmidt Gmbh, 7107 Neckarsulm | Water-soluble salt cores |
DE1934787A1 (en) * | 1969-07-09 | 1971-01-14 | Schmidt Gmbh Karl | Salt core for foundry purposes |
JPS60118350A (en) * | 1983-11-30 | 1985-06-25 | Izumi Jidosha Kogyo Kk | Method for forming cavity in high-pressure casting |
US5248552A (en) * | 1990-07-11 | 1993-09-28 | Advanced Plastics Partnership | Molding core |
WO1998000251A1 (en) * | 1996-07-01 | 1998-01-08 | Alyn Corporation | Die casting employing soluble core |
Also Published As
Publication number | Publication date |
---|---|
DE10312782A1 (en) | 2004-10-07 |
WO2004082866A3 (en) | 2004-12-16 |
DE112004000975D2 (en) | 2006-02-16 |
WO2004082866A2 (en) | 2004-09-30 |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |