JP4719248B2 - 鋳型材料混合物、鋳造用鋳型、および該鋳造用鋳型の製造方法 - Google Patents
鋳型材料混合物、鋳造用鋳型、および該鋳造用鋳型の製造方法 Download PDFInfo
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- JP4719248B2 JP4719248B2 JP2008152417A JP2008152417A JP4719248B2 JP 4719248 B2 JP4719248 B2 JP 4719248B2 JP 2008152417 A JP2008152417 A JP 2008152417A JP 2008152417 A JP2008152417 A JP 2008152417A JP 4719248 B2 JP4719248 B2 JP 4719248B2
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- 239000000203 mixture Substances 0.000 title claims description 70
- 238000005266 casting Methods 0.000 title claims description 37
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 57
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 45
- 239000002245 particle Substances 0.000 claims description 40
- 239000011230 binding agent Substances 0.000 claims description 37
- 239000004576 sand Substances 0.000 claims description 37
- 239000000654 additive Substances 0.000 claims description 34
- 230000000996 additive effect Effects 0.000 claims description 30
- 238000001035 drying Methods 0.000 claims description 19
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims description 17
- 239000000725 suspension Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 2
- 230000008602 contraction Effects 0.000 claims 1
- 239000003110 molding sand Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 42
- 238000012360 testing method Methods 0.000 description 22
- 238000005452 bending Methods 0.000 description 18
- 238000003860 storage Methods 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000002585 base Substances 0.000 description 8
- 239000000377 silicon dioxide Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 229920000388 Polyphosphate Polymers 0.000 description 4
- 239000007900 aqueous suspension Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000001205 polyphosphate Substances 0.000 description 4
- 235000011176 polyphosphates Nutrition 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 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
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000011164 primary particle Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011049 pearl Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000011163 secondary particle Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
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
-
- 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
- B22C1/18—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
1.本発明の懸濁液(以下「添加剤C」ともいう)を添加していない基本混合物
2.25%のナノSiO2、25%のマイクロSiO2、50%の水からなる懸濁液を添加した基本混合物
3.上記懸濁液と等量の水を添加した基本混合物
Brunhuber 400頁に準拠して測定したHaltern鋳型砂
NaOH 0.20%
アルカリ珪酸塩粘結剤 1.80%
添加剤 −
GF流動性:73%
GF流動性はBrunhuber 352〜353頁に準拠して測定
F+[(h1−h)/(h1−h2)]×100%
NaOH 0.20%
アルカリ珪酸塩粘結剤 1.80%
添加剤C* 1.00%
(添加剤C:25%のナノSiO2、25%のマイクロSiO2、50%の水からなる懸濁液、球状ナノSiO2は0.03μmの平均粒径を有し、球状マイクロSiO2は3μmの平均粒径を有する)
GF流動性:87%
NaOH 0.20%
アルカリ珪酸塩粘結剤 1.80%
水 0.50%
GF流動性:73%
基本混合物 73%
EP‘719に記載の粘結剤 75%
DE‘535に記載の鋳型材料混合物 80%
基本混合物+添加剤C 87%
NaOH 0.20%
アルカリ珪酸塩粘結剤 1.40%
添加剤 −
曲げ強度
除去強度 289N/cm2
中子貯蔵時間1h 284N/cm2
中子貯蔵時間3h 281N/cm2
中子貯蔵時間24h 287N/cm2
NaOH 0.20%
アルカリ珪酸塩粘結剤 1.40%
添加剤C* 1.00%
曲げ強度
除去強度 475N/cm2
中子貯蔵時間1h 483N/cm2
中子貯蔵時間3h 476N/cm2
中子貯蔵時間24h 475N/cm2
(添加剤C:25%のナノSiO2、25%のマイクロSiO2、50%の水の懸濁液)
NaOH 0.20%
アルカリ珪酸塩粘結剤 1.40%
添加剤 −
第1の試験片(25秒後) 64N/cm2 65N/cm2 65N/cm2
第2の試験片(50秒後) 62N/cm2 65N/cm2 64N/cm2
第3の試験片(75秒後) 62N/cm2 65N/cm2 64N/cm2
NaOH 0.20%
アルカリ珪酸塩粘結剤 1.40%
添加剤C* 1.00%
(添加剤C:25%のナノSiO2、25%のマイクロSiO2、50%の水の懸濁液)
第1の試験片(25秒後) 81N/cm2 84N/cm2 80N/cm2
第2の試験片(50秒後) 95N/cm2 92N/cm2 95N/cm2
第3の試験片(75秒後) 109N/cm2 102N/cm2 105N/cm2
1.基本混合物
NaOH 0.20%
アルカリ珪酸塩粘結剤 2.40%
シリコーン油 0.10%
中子貯蔵時間[h] 曲げ強度 曲げ強度
(湿気キャビネット) マイクロ波乾燥あり マイクロ波乾燥なし
0 289N/cm2 57N/cm2
1 240N/cm2 86N/cm2
3 200N/cm2 50N/cm2
24 25N/cm2 22N/cm2
NaOH 0.20%
アルカリ珪酸塩粘結剤 1.40%
添加剤C* 1.00%
(添加剤C:25%のナノSiO2、25%のマイクロSiO2、50%の水の懸濁液)
中子貯蔵時間[h] 曲げ強度 曲げ強度
(湿気キャビネット) マイクロ波乾燥あり マイクロ波乾燥なし
0 475N/cm2 87N/cm2
1 409N/cm2 106N/cm2
3 303N/cm2 73N/cm2
24 85N/cm2 87N/cm2
鋳肌品質を判断するために、窪み形状を有する中子(150mm×80mm)を使用した。中子は、Vogel und Schemann AG社製の実験室ベーンミキサーで混合した鋳型材料で形成した。まず、珪砂を用意し、NaOHと共に撹拌し、次に水ガラスを添加した。混合物を1分間撹拌した後、撹拌を続けながら非晶質二酸化珪素(本発明に係る実施例)を添加した。比較例では、ポリリン酸塩溶液(米国特許第5,641,015号又は非晶質球状SiO2(‘535))を添加した。次に、混合物をさらに1分間撹拌した。
鋳造パラメータ
鋳造品寸法:150×80×40mm
鋳造品重量:900g
使用合金:AlSi 7mg
鋳造温度:740℃
静止鋳造高さ(static casting height):200mm
混合物 砂付着表面
添加剤を添加しない基本混合物 75%
ポリリン酸塩及びホウ酸塩を添加した基本混合物 60%(US‘015)
ガラス真珠を添加した基本混合物、
厚み100〜200μm、
ドイツ特許出願公開第102004042535号
(AS LUNGEN社)の表5 Nr.3.7 25%(DE‘535)
広い粒子スペクトルを有する本発明の基本混合物 <10%(本発明)
実施例a)2
Claims (7)
- 鋳型砂と、水酸化ナトリウム溶液と、アルカリ珪酸塩粘結剤と、添加剤と、を含む鋳造用鋳型材料混合物であって、前記鋳型砂粒子は0.1〜1mmの粒径を有し、前記鋳型材料混合物は、前記鋳型材料混合物の重量に対して0.1〜10重量%の前記水酸化ナトリウム溶液を含み、前記水酸化ナトリウム溶液は20〜40重量%の濃度を有し、前記鋳型材料混合物は、20〜70重量%の固形分を有する前記アルカリ珪酸塩粘結剤を0.1〜5重量%の量で含み、前記鋳型材料混合物は、前記添加剤として、30〜70重量%の固形分を有し、2種類の異なる粒径を有する非晶質球状SiO2 (以下、SiO 2 )の懸濁液を0.1〜3重量%の量で含み、第1の粒径Aを有するSiO 2 は1〜5μmの粒径を有するSiO 2 (以下、マイクロSiO 2 )であり、第2の粒径Bを有するSiO 2 は0.01〜0.05μmの粒径を有するSiO 2 (以下、ナノSiO 2 )であり、前記粒径Aを有する粒子と前記粒径Bを有する粒子の体積比は0.8:1.2〜1.0:1.0であることを特徴とする鋳型材料混合物。
- 請求項1に記載の鋳型材料混合物によって製造された鋳造用鋳型であって、前記鋳型内の各鋳型砂粒子の表面が、マイクロSiO 2 による一次構造を含み、前記マイクロSiO 2 が各鋳型砂粒子を互いに分離しており、0.5〜2μmの厚みを有し、鋳型砂粒子上に均一に分散された粘結剤層内に分散されたナノSiO 2 の二次構造を有し、前記ナノSiO 2 は300nm以下の高さ/深さの山及び谷を形成していることを特徴とする鋳造用鋳型。
- 前記請求項2に記載の鋳造用鋳型の製造方法であって、前記鋳型砂を用意し、鋳型砂を前記水酸化ナトリウム溶液と混合し、前記アルカリ珪酸塩粘結剤と混合し、前記粘結剤を粘結剤被覆として全ての前記鋳型砂粒子上に均一に分散させ、前記2種類の異なる粒径を有するSiO 2 の混合物を前記粘結剤被覆内に混合し、前記鋳型材料混合物を乾燥して鋳造用鋳型の成形品を形成することを含み、前記粘結剤被覆が前記乾燥工程時に収縮し、前記高さの差が300nm以下の粗さを有する構造を形成することを特徴とする鋳造用鋳型の製造方法。
- 前記鋳型砂に前記水酸化ナトリウム溶液を0.10〜0.30重量%混合し、前記アルカリ珪酸塩粘結剤を1〜4重量%添加し、前記粘結剤を0.5〜2μmの厚みを有する粘結剤被覆として前記鋳型砂粒子上に均一に分散させることを特徴とする請求項3に記載の鋳造用鋳型の製造方法。
- 前記乾燥工程時に、前記粘結剤被覆が50〜70vol%収縮することを特徴とする、請求項3又は4に記載の鋳造用鋳型の製造方法。
- 前記乾燥工程が、前記粘結剤被覆を40〜60vol%予備収縮させる工程と、残りの収縮を熱によって生じさせる工程からなる物理的な乾燥工程であることを特徴とする、請求項3〜5のいずれか1項に記載の鋳造用鋳型の製造方法。
- 前記残りの収縮を熱によって生じさせる工程をマイクロ波加熱炉内で行うことを特徴とする、請求項3〜6のいずれか1項に記載の鋳造用鋳型の製造方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102007027577.5 | 2007-06-12 | ||
DE102007027577A DE102007027577A1 (de) | 2007-06-12 | 2007-06-12 | Formstoffmischung, Formling für Gießereizwecke und Verfahren zur Herstellung eines Formlings |
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JP4719248B2 true JP4719248B2 (ja) | 2011-07-06 |
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US (1) | US8006745B2 (ja) |
EP (1) | EP2014392B1 (ja) |
JP (1) | JP4719248B2 (ja) |
KR (1) | KR101027030B1 (ja) |
CN (1) | CN101323008B (ja) |
AR (1) | AR066992A1 (ja) |
AT (1) | ATE511419T1 (ja) |
AU (1) | AU2008202587B2 (ja) |
BR (1) | BRPI0803387A2 (ja) |
CA (1) | CA2631908C (ja) |
DE (1) | DE102007027577A1 (ja) |
DK (1) | DK2014392T3 (ja) |
ES (1) | ES2365827T3 (ja) |
MX (1) | MX2008007515A (ja) |
NZ (1) | NZ568939A (ja) |
PL (1) | PL2014392T3 (ja) |
RU (1) | RU2385201C2 (ja) |
SI (1) | SI2014392T1 (ja) |
UA (1) | UA88412C2 (ja) |
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DE102010023644A1 (de) * | 2009-07-01 | 2011-01-05 | Ksm Castings Gmbh | Verfahren zum Gießen eines Materials, Verwendung des Verfahrens, Gießform zur Durchführung des Verfahrens und nach dem Verfahren bzw. in der Gießform hergestellte Gegenstände sowie Kern zum Einlegen in eine solche Gießform |
KR101199111B1 (ko) * | 2009-10-30 | 2012-11-09 | 현대자동차주식회사 | 주물용 중자 재료 혼합물, 주물용 중자 제조방법 및 이를 이용하여 제조된 주물용 중자 |
US8974587B2 (en) | 2010-11-15 | 2015-03-10 | Honda Motor Co., Ltd. | Casting sand core composition |
JP4920794B1 (ja) * | 2011-11-02 | 2012-04-18 | 株式会社ツチヨシ産業 | 鋳型材料及び鋳型並びに鋳型の製造方法 |
DE102012103705A1 (de) | 2012-04-26 | 2013-10-31 | Ask Chemicals Gmbh | Verfahren zur Herstellung von Formen und Kernen für den Metallguss sowie nach diesem Verfahren hergestellte Formen und Kerne |
DE102012020509A1 (de) | 2012-10-19 | 2014-06-12 | Ask Chemicals Gmbh | Formstoffmischungen auf der Basis anorganischer Bindemittel und Verfahren zur Herstellung von Formen und Kerne für den Metallguss |
DE102012020510B4 (de) | 2012-10-19 | 2019-02-14 | Ask Chemicals Gmbh | Formstoffmischungen auf der Basis anorganischer Bindemittel und Verfahren zur Herstellung von Formen und Kerne für den Metallguss |
DE102012020511A1 (de) | 2012-10-19 | 2014-04-24 | Ask Chemicals Gmbh | Formstoffmischungen auf der Basis anorganischer Bindemittel und Verfahren zur Herstellung von Formen und Kerne für den Metallguss |
DE102013106276A1 (de) * | 2013-06-17 | 2014-12-18 | Ask Chemicals Gmbh | Lithiumhaltige Formstoffmischungen auf der Basis eines anorganischen Bindemittels zur Herstellung von Formen und Kernen für den Metallguss |
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DE102016110752A1 (de) | 2016-06-10 | 2017-12-14 | Dr Axion Co., Ltd. | Bindemittelzusammensetzung zum vergiessen |
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DE102019123372A1 (de) | 2019-08-30 | 2021-03-04 | Bindur Gmbh | Warmhärtender Formstoff zur Herstellung von Kernen und Formen im Sandformverfahren |
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UA88412C2 (ru) | 2009-10-12 |
US8006745B2 (en) | 2011-08-30 |
AU2008202587B2 (en) | 2010-01-28 |
CA2631908A1 (en) | 2008-12-12 |
DK2014392T3 (da) | 2011-09-12 |
AR066992A1 (es) | 2009-09-23 |
ATE511419T1 (de) | 2011-06-15 |
CN101323008B (zh) | 2012-11-21 |
BRPI0803387A2 (pt) | 2009-08-04 |
MX2008007515A (es) | 2009-03-04 |
AU2008202587A1 (en) | 2009-01-08 |
EP2014392A3 (de) | 2010-07-21 |
EP2014392A2 (de) | 2009-01-14 |
DE102007027577A1 (de) | 2008-12-18 |
ES2365827T3 (es) | 2011-10-11 |
JP2008307604A (ja) | 2008-12-25 |
KR101027030B1 (ko) | 2011-04-11 |
PL2014392T3 (pl) | 2011-10-31 |
CN101323008A (zh) | 2008-12-17 |
SI2014392T1 (sl) | 2011-09-30 |
RU2008123122A (ru) | 2009-12-20 |
NZ568939A (en) | 2009-09-25 |
EP2014392B1 (de) | 2011-06-01 |
US20080314549A1 (en) | 2008-12-25 |
KR20080109624A (ko) | 2008-12-17 |
RU2385201C2 (ru) | 2010-03-27 |
CA2631908C (en) | 2011-07-12 |
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