WO2017208913A1 - Ceramic filter and method for manufacturing ceramic filter - Google Patents
Ceramic filter and method for manufacturing ceramic filter Download PDFInfo
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- WO2017208913A1 WO2017208913A1 PCT/JP2017/019287 JP2017019287W WO2017208913A1 WO 2017208913 A1 WO2017208913 A1 WO 2017208913A1 JP 2017019287 W JP2017019287 W JP 2017019287W WO 2017208913 A1 WO2017208913 A1 WO 2017208913A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the present invention relates to a ceramic filter for removing unnecessary substances from a molten metal and a method for manufacturing the ceramic filter.
- a ceramic filter is used as a filter capable of filtering and collecting inclusions in a high-temperature molten metal in order to remove the inclusions in the molten aluminum and improve the quality of the molten metal because it significantly deteriorates (Patent Document 1). reference).
- Patent Document 2 As a conventional method for producing a ceramic filter, there is one disclosed in Patent Document 2, for example.
- the method for producing a ceramic filter of Patent Document 2 is to knead aggregate particles, inorganic binder raw material, an appropriate amount of organic binder, and an appropriate amount of water, mold, dry, and then heat to 1150 degrees to 1400 degrees
- the cooling is naturally cooled to 870 ° C. to 750 ° C. and held at that temperature for 3 to 9 hours, This is a manufacturing method that considers improving the quality and bending strength of ceramic filters.
- Patent Document 1 also shows a cylindrical shape other than a plate shape, but it is a thin cylindrical shape with a curved plate shape. In any case, it was difficult to integrally form a ceramic filter other than a plate shape and a shape conforming thereto.
- the present invention has been made in view of such circumstances, and is excellent in strength and corrosion resistance, provides not only a thin plate shape, but also various ceramic filters, and a method for producing a ceramic filter capable of integrally forming various shapes Is to provide.
- the ceramic filter according to claim 1 is a mixed material obtained by kneading a predetermined amount of organic thickener, a predetermined amount of powdered glass, a predetermined amount of inorganic cement, and an appropriate amount of water as a binder to an aggregate made of granular ceramics. And after the mixture material is molded, the aggregate is welded by heating and then cooling.
- the ceramic filter according to claim 2 is characterized in that the ceramic aggregate uses any one or more of silicon carbide, silicon nitride, boron nitride, zircon, zirconia, and alumina.
- the weight percentage of the inorganic cement is 0.5% to 10%.
- the ceramic filter according to claim 4 is characterized in that the maximum particle size of the aggregate is 0.01 mm to 10 mm.
- the ceramic filter according to claim 5 is characterized in that the mixed material is formed into a crucible shape.
- the ceramic filter according to claim 6 is characterized in that the mixed material is formed into a hemispherical, polygonal, cylindrical, elliptical, semicircular, or semielliptical crucible.
- the mixed material is made of spherical, hemispherical, polygonal cylindrical, polygonal column, cylindrical, cylindrical, elliptical cylindrical, elliptical cylindrical, semicircular cylindrical, semicircular cylindrical, semicircular It is characterized by being formed into an elliptic cylindrical shape or a semi-elliptical cylindrical shape.
- the ceramic filter according to claim 9 is characterized in that a mortar-shaped lower portion of the upper chamber portion protrudes in the axial center direction of the lower chamber portion at the position of the upper opening of the lower chamber portion, and has a check protrusion shape. To do.
- the method for producing a ceramic filter according to claim 10 wherein a predetermined amount of an organic thickener, a predetermined amount of powdered glass, a predetermined amount of inorganic cement, and an appropriate amount of water are kneaded into an aggregate made of granular ceramics.
- the mixed material is formed, and after the mixed material is molded, the aggregate is welded by heating and then cooling.
- the method for producing a ceramic filter according to claim 11 is characterized in that the ceramic aggregate uses any one or more of silicon carbide, silicon nitride, boron nitride, zircon, zirconia, and alumina.
- the method for producing a ceramic filter according to claim 13 is characterized in that the maximum particle size of the aggregate is 0.01 mm to 10 mm.
- the method for producing a ceramic filter according to claim 14 is characterized in that the mixed material is formed into a crucible shape.
- the method for producing a ceramic filter according to claim 15 is characterized in that the mixed material is formed into a hemispherical, polygonal cylindrical, cylindrical, elliptical cylindrical, semicircular cylindrical or semielliptical cylindrical crucible. .
- the mixed material is substantially cylindrical and has a bowl-shaped upper chamber portion whose inner surface is inclined downward, and a diameter larger than a lower opening of the upper chamber portion. It is cylindrical and is formed into a shape having a lower chamber portion provided below the upper chamber portion.
- the organic thickener and powdered glass as a binder to the aggregate made of granular ceramics, it is excellent in strength and corrosion resistance, not only in the form of a thin plate, but also in various forms. And a ceramic filter manufacturing method capable of integrally forming various shapes.
- FIG. 1 is an explanatory view showing an example of a cylindrical crucible with a bottom of a ceramic filter according to the present invention.
- FIG. 2 is an explanatory view showing an example of a crucible having a bottom and a bottom of a ceramic filter according to the present invention.
- FIG. 3 is an explanatory view showing an example of a cylindrical shape of a ceramic filter according to the present invention.
- FIG. 4 is an explanatory view showing an example of a cylindrical shape of a ceramic filter according to the present invention.
- FIG. 5 is an explanatory view showing an example of a spherical shape of a ceramic filter according to the present invention.
- FIG. 6 is an explanatory view showing an example of a hemispherical crucible shape of the ceramic filter according to the present invention.
- FIG. 7 is an explanatory view showing an example of an elliptical cylindrical bottomed crucible shape of the ceramic filter according to the present invention.
- FIG. 8 is an explanatory view showing an example of a semi-elliptical cylindrical bottomed crucible shape of the ceramic filter according to the present invention.
- FIG. 9 is an explanatory view showing an example of a two-chamber shape of the ceramic filter according to the present invention.
- FIG. 10 is an explanatory view showing a cross section of the ceramic filter of FIG.
- the ceramic filters 1 to 9 are filters for removing unnecessary materials from the molten metal.
- the ceramic filter 1 has a cylindrical crucible shape with a bottom.
- the ceramic filter 1 is formed into a cylindrical crucible with a bottom by a series of integral molding procedures in which a mixed material described later is put into a mold, molded, demolded, dried, and then fired. It is something to make up.
- a mixed material is obtained by kneading a predetermined amount of an organic thickener, a predetermined amount of powdered glass, a predetermined amount of inorganic cement, and an appropriate amount of water as a binder to a granular ceramic aggregate 10.
- the particle diameter of the aggregate 10 is not particularly limited. However, considering that the aggregate 10 is integrally formed into an arbitrary shape with the gap of the aggregate 10 left as much as possible, The particle size is preferably 0.01 mm to 10 mm.
- the aggregate 10 is a granular ceramic, it is desirable to use any one of silicon carbide, silicon nitride, boron nitride, zircon, zirconia, or alumina, or any two or more of them.
- the amount of organic thickener, powder glass and inorganic cement is 0.1% to 5% by weight of organic thickener and the weight percentage of powder glass is based on the total weight of the mixed material.
- a range of 0.5% to 10% and a weight percentage of inorganic cement of 0.5% to 10% is desirable.
- organic thickeners eg starch
- organic thickeners have good film-thickness and high bonding strength after drying. It plays the role of shape retention during demolding and drying of the molded body. That is, the organic thickener contributes to the molding and holding of the vertical wall and the like at room temperature to 300 ° C.
- the organic thickener has a disadvantage that it loses its shape retaining property because it burns out in the firing process (burns out at about 300 ° C.).
- powdered glass softens and melts at about 600 ° C. to about 1200 ° C., adheres to the surface of the aggregate 10 particles, solidifies after cooling, and exhibits high bonding strength.
- the powdered glass has no binding force until the softening and melting temperature is reached, and since it is softened and melted at the time of firing, when the mixed material has a shape other than a thin plate, the adhesive effect of the organic thickener is lost. The mixed material being fired cannot be kept in a predetermined shape.
- an inorganic cement is kneaded unlike a mixed material obtained by kneading a conventional organic thickener and powdered glass. Since this inorganic cement exhibits a binding force at an intermediate temperature to a firing temperature, that is, 300 ° C. to 600 ° C., it becomes possible to form and hold a vertical wall or the like in the middle of firing.
- the ceramic filter 1 According to the manufacturing method of the ceramic filter 1 as described above, it is excellent in strength and corrosion resistance, can provide not only a thin plate shape but also various shapes of ceramic filters 1 to 9 and the like, and various shapes of ceramic filters 1 to 9 etc. can be integrally formed.
- shapes that can be formed include the cylindrical and bottomed crucible shape shown in FIG. 1, the square cylindrical bottomed crucible (bottom shape) ceramic filter 2 shown in FIG. 2, and the cylindrical shape shown in FIG. And the cylindrical ceramic filter 4 of FIG. Further, the spherical ceramic filter 5 of FIG. 5, the hemispherical crucible ceramic filter 6 of FIG. 6, the elliptic cylindrical bottomed crucible ceramic filter 7 of FIG. 7, and the semi-elliptical cylinder of FIG. There is also a shape like a crucible-shaped ceramic filter 8 with a bottom.
- the ceramic filter 9 is substantially cylindrical and has a larger diameter than the upper chamber portion 30 having a bowl shape in which the inner surface (inclined portion 36) is inclined downward and the lower opening 32 of the upper chamber portion 30.
- the lower chamber part 20 provided in the substantially cylindrical shape and the downward direction of the upper chamber part 30 is provided.
- the ceramic filter 9 has a mortar-shaped lower portion of the upper chamber portion 30 that protrudes in the axial center direction of the lower chamber portion 20 at the position of the upper opening 22 of the lower chamber portion 20, so 34).
- the ceramic filter 9 has the bottom 24 in FIG. 10, the presence or absence of the bottom 24 may be any.
- FIGS. 1 to 10 are merely examples, and cubes, rectangular parallelepipeds, and even more complicated shapes can be formed.
- a crucible shape is useful as the shape of the ceramic filter (the shape for molding the mixed material), and in particular, hemispherical, polygonal cylindrical, cylindrical, elliptical cylindrical, semicircular cylindrical or semielliptical cylindrical
- a crucible with a bottom is useful.
- the shape of the ceramic filter (the shape for forming the mixed material) is spherical, hemispherical, polygonal cylindrical, polygonal columnar, cylindrical, cylindrical, elliptical cylindrical, elliptical cylindrical, semicircular cylindrical, semicircular
- a cylindrical shape, semi-elliptical cylindrical shape, or semi-elliptical cylindrical shape is also useful.
- the present invention is excellent in strength and corrosion resistance, provides not only a thin plate shape, but also various ceramic filters, and also provides a method for producing a ceramic filter capable of integrally forming various shapes. it can.
- Ceramic filter 10 ... Aggregate 20 ... Lower chamber part 22 ... Upper opening 24 ... Bottom 30 ... Upper chamber part 32 ... Lower part Opening 34... Check protrusion 36..
Abstract
A ceramic filter is characterized in that a mixed material prepared by kneading an aggregate (10) made from a granular ceramic material together with a specified amount of an organic thickening agent, a specified amount of a powdery glass and a specified amount of an inorganic cement which serve as binders and a proper amount of water is provided, and the mixed material is molded, is then heated, and is then cooled to adhere the aggregate (10). The ceramic filter is also characterized in that the percentages of the organic thickening agent, the powdery glass and the inorganic cement are 0.1% to 5% by weight, 0.5% to 10% by weight and 0.5% to 10% by weight, respectively, relative to the whole weight of the mixed material.
Description
本発明は、金属溶湯中から不要物を除去するセラミックフィルター及びセラミックフィルターの製造方法に関する。
The present invention relates to a ceramic filter for removing unnecessary substances from a molten metal and a method for manufacturing the ceramic filter.
従来より、アルミニウム鋳造部品の製造分野ではアルミ地金やアルミスクラップの溶解の際に発生する酸化物や不純物等による非金属介在物が鋳造品に混入して欠陥となり、製品の表面状態や特性を著しく劣化させることから、アルミニウム溶湯中の介在物を除去して溶湯の品質向上を図るため、高温の溶湯中で介在物を濾過、捕集できるフィルターとしてセラミックフィルターが用いられている（特許文献１参照）。
Conventionally, in the field of manufacturing cast aluminum parts, non-metallic inclusions due to oxides and impurities generated during the melting of aluminum bullion and aluminum scrap are mixed into the cast product, resulting in defects, and the surface condition and characteristics of the product are reduced. A ceramic filter is used as a filter capable of filtering and collecting inclusions in a high-temperature molten metal in order to remove the inclusions in the molten aluminum and improve the quality of the molten metal because it significantly deteriorates (Patent Document 1). reference).
また、従来のセラミックフィルターの製造方法としては、例えば特許文献２に示されるものがある。特許文献２のセラミックフィルターの製造方法は、骨材粒子と、無機質結合材原料と、適量の有機バインダーと、適量の水とを混練し、成形し、乾燥し、次いで１１５０度～１４００度まで加熱して無機質結合材原料を溶融させ、その後、冷却して得られるセラミックフィルターにおいて、冷却を、自然放冷で８７０度～７５０度まで冷却し、その温度に３～９時間保持するものであり、セラミックフィルターの品質や曲げ強度を向上させることを考慮した製造方法である。
Further, as a conventional method for producing a ceramic filter, there is one disclosed in Patent Document 2, for example. The method for producing a ceramic filter of Patent Document 2 is to knead aggregate particles, inorganic binder raw material, an appropriate amount of organic binder, and an appropriate amount of water, mold, dry, and then heat to 1150 degrees to 1400 degrees In the ceramic filter obtained by melting the inorganic binder raw material and then cooling, the cooling is naturally cooled to 870 ° C. to 750 ° C. and held at that temperature for 3 to 9 hours, This is a manufacturing method that considers improving the quality and bending strength of ceramic filters.
しかしながら、従来のセラミックフィルターでは、耐久性に乏しい難点があり、かつ特許文献１にも板状以外の円筒形状のものが示されているが、板状を湾曲させた程度の薄手の円筒形状であればともかく、板状及びそれに準じた形状以外のセラミックフィルターを一体的に成形させることは困難であった。
However, the conventional ceramic filter has a disadvantage that is poor in durability, and Patent Document 1 also shows a cylindrical shape other than a plate shape, but it is a thin cylindrical shape with a curved plate shape. In any case, it was difficult to integrally form a ceramic filter other than a plate shape and a shape conforming thereto.
本発明は、このような事情に鑑みてなされたもので、強度、耐食性に優れ、薄板状だけではなく、各種のセラミックフィルターを提供し、また、各種の形状を一体成形できるセラミックフィルターの製造方法を提供することにある。
The present invention has been made in view of such circumstances, and is excellent in strength and corrosion resistance, provides not only a thin plate shape, but also various ceramic filters, and a method for producing a ceramic filter capable of integrally forming various shapes Is to provide.
請求項１記載のセラミックフィルターは、粒状のセラミックスからなる骨材に、結合剤として所定量の有機増粘剤と所定量の粉末ガラスと所定量の無機セメントと、適量の水を混練した混合材料とし、混合材料を成形した後、加熱及びその後冷却して骨材を溶着させたことを特徴とする。
The ceramic filter according to claim 1 is a mixed material obtained by kneading a predetermined amount of organic thickener, a predetermined amount of powdered glass, a predetermined amount of inorganic cement, and an appropriate amount of water as a binder to an aggregate made of granular ceramics. And after the mixture material is molded, the aggregate is welded by heating and then cooling.
請求項２記載のセラミックフィルターは、セラミックスの骨材が、炭化ケイ素、窒化ケイ素、窒化ホウ素、ジルコン、ジルコニア若しくはアルミナのいずれか又はいずれか２種類以上を用いたものであることを特徴とする。
The ceramic filter according to claim 2 is characterized in that the ceramic aggregate uses any one or more of silicon carbide, silicon nitride, boron nitride, zircon, zirconia, and alumina.
請求項３記載のセラミックフィルターは、混合材料の全体重量に対し、有機増粘剤の重量パーセントが、０．１％～５％で、粉末ガラスの重量パーセントが、０．５％～１０％で、無機セメントの重量パーセントが、０．５％～１０％であることを特徴とする。
The ceramic filter according to claim 3, wherein the weight percentage of the organic thickener is 0.1% to 5% and the weight percentage of the powdered glass is 0.5% to 10% with respect to the total weight of the mixed material. The weight percentage of the inorganic cement is 0.5% to 10%.
請求項４記載のセラミックフィルターは、骨材の最大粒径が、０．０１ｍｍ～１０ｍｍであることを特徴とする。
The ceramic filter according to claim 4 is characterized in that the maximum particle size of the aggregate is 0.01 mm to 10 mm.
請求項５記載のセラミックフィルターは、混合材料を、坩堝状に成形したことを特徴とする。
The ceramic filter according to claim 5 is characterized in that the mixed material is formed into a crucible shape.
請求項６記載のセラミックフィルターは、混合材料を、半球状、多角筒状、円筒状、楕円円筒状、半円円筒状又は半楕円円筒状の坩堝状に成形したことを特徴とする。
The ceramic filter according to claim 6 is characterized in that the mixed material is formed into a hemispherical, polygonal, cylindrical, elliptical, semicircular, or semielliptical crucible.
請求項７記載のセラミックフィルターは、混合材料を、球状、半球状、多角筒状、多角柱状、円筒状、円柱状、楕円円筒状、楕円円柱状、半円円筒状、半円円柱状、半楕円円筒状又は半楕円円柱状に成形したことを特徴とする。
In the ceramic filter according to claim 7, the mixed material is made of spherical, hemispherical, polygonal cylindrical, polygonal column, cylindrical, cylindrical, elliptical cylindrical, elliptical cylindrical, semicircular cylindrical, semicircular cylindrical, semicircular It is characterized by being formed into an elliptic cylindrical shape or a semi-elliptical cylindrical shape.
請求項８記載のセラミックフィルターは、混合材料を、略筒状で、内面が下方に向かって傾斜する擂鉢状の上室部と、上室部の下部開口よりも径が大きい略筒状で、上室部の下方に設けられた下室部とを有する形状に成形したことを特徴とする。
The ceramic filter according to claim 8, wherein the mixed material has a substantially cylindrical shape, a bowl-shaped upper chamber portion whose inner surface is inclined downward, and a substantially cylindrical shape having a diameter larger than a lower opening of the upper chamber portion, It is formed into a shape having a lower chamber portion provided below the upper chamber portion.
請求項９記載のセラミックフィルターは、上室部の擂鉢状の下部部分が、下室部の上部開口部位置において、下室部の軸中心方向に突出し、逆止突起状であることを特徴とする。
The ceramic filter according to claim 9 is characterized in that a mortar-shaped lower portion of the upper chamber portion protrudes in the axial center direction of the lower chamber portion at the position of the upper opening of the lower chamber portion, and has a check protrusion shape. To do.
請求項１０記載のセラミックフィルターの製造方法は、粒状のセラミックスからなる骨材に、結合剤として所定量の有機増粘剤と所定量の粉末ガラスと所定量の無機セメントと、適量の水を混練した混合材料とし、混合材料を成形した後、加熱及びその後冷却して骨材を溶着させることを特徴とする。
The method for producing a ceramic filter according to claim 10, wherein a predetermined amount of an organic thickener, a predetermined amount of powdered glass, a predetermined amount of inorganic cement, and an appropriate amount of water are kneaded into an aggregate made of granular ceramics. The mixed material is formed, and after the mixed material is molded, the aggregate is welded by heating and then cooling.
請求項１１記載のセラミックフィルターの製造方法は、セラミックスの骨材が、炭化ケイ素、窒化ケイ素、窒化ホウ素、ジルコン、ジルコニア若しくはアルミナのいずれか又はいずれか２種類以上を用いたものであることを特徴とする。
The method for producing a ceramic filter according to claim 11 is characterized in that the ceramic aggregate uses any one or more of silicon carbide, silicon nitride, boron nitride, zircon, zirconia, and alumina. And
請求項１２記載のセラミックフィルターの製造方法は、混合材料の全体重量に対し、有機増粘剤の重量パーセントが、０．１％～５％で、粉末ガラスの重量パーセントが、０．５％～１０％で、無機セメントの重量パーセントが、０．５％～１０％であることを特徴とする。
The method for producing a ceramic filter according to claim 12, wherein the weight percentage of the organic thickener is 0.1% to 5% and the weight percentage of the powder glass is 0.5% to the total weight of the mixed material. At 10%, the weight percentage of the inorganic cement is 0.5% to 10%.
請求項１３記載のセラミックフィルターの製造方法は、骨材の最大粒径が、０．０１ｍｍ～１０ｍｍであることを特徴とする。
The method for producing a ceramic filter according to claim 13 is characterized in that the maximum particle size of the aggregate is 0.01 mm to 10 mm.
請求項１４記載のセラミックフィルターの製造方法は、混合材料を、坩堝状に成形することを特徴とする。
The method for producing a ceramic filter according to claim 14 is characterized in that the mixed material is formed into a crucible shape.
請求項１５記載のセラミックフィルターの製造方法は、混合材料を、半球状、多角筒状、円筒状、楕円円筒状、半円円筒状又は半楕円円筒状の坩堝状に成形することを特徴とする。
The method for producing a ceramic filter according to claim 15 is characterized in that the mixed material is formed into a hemispherical, polygonal cylindrical, cylindrical, elliptical cylindrical, semicircular cylindrical or semielliptical cylindrical crucible. .
請求項１６記載のセラミックフィルターの製造方法は、混合材料を、球状、半球状、多角筒状、多角柱状、円筒状、円柱状、楕円円筒状、楕円円柱状、半円円筒状、半円円柱状、半楕円円筒状又は半楕円円柱状に成形することを特徴とする。
The method for producing a ceramic filter according to claim 16, wherein the mixed material is made of a spherical shape, a hemispherical shape, a polygonal cylindrical shape, a polygonal columnar shape, a cylindrical shape, a cylindrical shape, an elliptical cylindrical shape, an elliptical cylindrical shape, a semicircular cylindrical shape, and a semicircular circle shape. It is formed into a columnar shape, a semi-elliptical cylindrical shape, or a semi-elliptical cylindrical shape.
請求項１７記載のセラミックフィルターの製造方法は、混合材料を、略筒状で、内面が下方に向かって傾斜する擂鉢状の上室部と、該上室部の下部開口よりも径が大きい略筒状で、該上室部の下方に設けられた下室部とを有する形状に成形することを特徴とする。
In the method for manufacturing a ceramic filter according to claim 17, the mixed material is substantially cylindrical and has a bowl-shaped upper chamber portion whose inner surface is inclined downward, and a diameter larger than a lower opening of the upper chamber portion. It is cylindrical and is formed into a shape having a lower chamber portion provided below the upper chamber portion.
請求項１８記載のセラミックフィルターの製造方法は、上室部の擂鉢状の下部部分が、下室部の上部開口部位置において、下室部の軸中心方向に突出し、逆止突起状であることを特徴とする。
The method for producing a ceramic filter according to claim 18, wherein the bowl-shaped lower portion of the upper chamber portion protrudes in the axial center direction of the lower chamber portion at the position of the upper opening of the lower chamber portion, and has a check projection shape. It is characterized by.
本願の発明によれば、粒状のセラミックスからなる骨材に結合剤として有機増粘剤と粉末ガラスに加え、無機セメントを用いていることで、強度、耐食性に優れ、薄板状だけではなく、各種のセラミックフィルターを提供でき、また、各種の形状を一体成形できるセラミックフィルターの製造方法である。
According to the invention of the present application, in addition to the organic thickener and powdered glass as a binder to the aggregate made of granular ceramics, it is excellent in strength and corrosion resistance, not only in the form of a thin plate, but also in various forms. And a ceramic filter manufacturing method capable of integrally forming various shapes.
以下、本発明の形態について図面を参照しながら具体的に説明する。図１は、本発明に係るセラミックフィルターの円筒状で底のある坩堝状の一例を示す説明図である。図２は、本発明に係るセラミックフィルターの四角筒状で底のある坩堝状の一例を示す説明図である。図３は、本発明に係るセラミックフィルターの円筒状の一例を示す説明図である。図４は、本発明に係るセラミックフィルターの円柱状の一例を示す説明図である。図５は、本発明に係るセラミックフィルターの球状の一例を示す説明図である。図６は、本発明に係るセラミックフィルターの半球状で坩堝状の一例を示す説明図である。図７は、本発明に係るセラミックフィルターの楕円円筒状で底のある坩堝状の一例を示す説明図である。図８は、本発明に係るセラミックフィルターの半楕円円筒状で底のある坩堝状の一例を示す説明図である。図９は、本発明に係るセラミックフィルターの２室形状の一例を示す説明図である。図１０は、図９のセラミックフィルターの断面を示す説明図である。
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is an explanatory view showing an example of a cylindrical crucible with a bottom of a ceramic filter according to the present invention. FIG. 2 is an explanatory view showing an example of a crucible having a bottom and a bottom of a ceramic filter according to the present invention. FIG. 3 is an explanatory view showing an example of a cylindrical shape of a ceramic filter according to the present invention. FIG. 4 is an explanatory view showing an example of a cylindrical shape of a ceramic filter according to the present invention. FIG. 5 is an explanatory view showing an example of a spherical shape of a ceramic filter according to the present invention. FIG. 6 is an explanatory view showing an example of a hemispherical crucible shape of the ceramic filter according to the present invention. FIG. 7 is an explanatory view showing an example of an elliptical cylindrical bottomed crucible shape of the ceramic filter according to the present invention. FIG. 8 is an explanatory view showing an example of a semi-elliptical cylindrical bottomed crucible shape of the ceramic filter according to the present invention. FIG. 9 is an explanatory view showing an example of a two-chamber shape of the ceramic filter according to the present invention. FIG. 10 is an explanatory view showing a cross section of the ceramic filter of FIG.
本発明に係るセラミックフィルター１～９は、金属溶湯中から不要物を除去するためのフィルターである。尚、以下の説明では、まず、セラミックフィルター１について説明する。セラミックフィルター１は、円筒状で底のある坩堝状である。セラミックフィルター１は、後述する混合材料を、型に入れて成型し、脱型した後に乾燥させ、その上で、焼成するといった一連の一体成形の手順で、この円筒状で底のある坩堝状に作りあげるものである。
The ceramic filters 1 to 9 according to the present invention are filters for removing unnecessary materials from the molten metal. In the following description, first, the ceramic filter 1 will be described. The ceramic filter 1 has a cylindrical crucible shape with a bottom. The ceramic filter 1 is formed into a cylindrical crucible with a bottom by a series of integral molding procedures in which a mixed material described later is put into a mold, molded, demolded, dried, and then fired. It is something to make up.
まず、混合材料であるが、これは、粒状のセラミックスの骨材１０に、結合剤として所定量の有機増粘剤と所定量の粉末ガラスと所定量の無機セメントと、適量の水を混練したものである。より具体的には、まず、骨材１０の粒径は、特に限定されるものではないが、骨材１０の隙間をできるだけ残した形で、任意の形状に一体成形することを考えると、最大粒径は０．０１ｍｍ～１０ｍｍが好ましい。
First, a mixed material is obtained by kneading a predetermined amount of an organic thickener, a predetermined amount of powdered glass, a predetermined amount of inorganic cement, and an appropriate amount of water as a binder to a granular ceramic aggregate 10. Is. More specifically, the particle diameter of the aggregate 10 is not particularly limited. However, considering that the aggregate 10 is integrally formed into an arbitrary shape with the gap of the aggregate 10 left as much as possible, The particle size is preferably 0.01 mm to 10 mm.
尚、骨材１０は、粒状のセラミックスであるが、炭化ケイ素、窒化ケイ素、窒化ホウ素、ジルコン、ジルコニア若しくはアルミナのいずれか又はいずれか２種類以上を用いたものが望ましい。
In addition, although the aggregate 10 is a granular ceramic, it is desirable to use any one of silicon carbide, silicon nitride, boron nitride, zircon, zirconia, or alumina, or any two or more of them.
次に、有機増粘剤、粉末ガラス及び無機セメントの量であるが、混合材料の全体重量に対し、有機増粘剤の重量パーセントが０．１％～５％で、粉末ガラスの重量パーセントが０．５％～１０％で、無機セメントの重量パーセントが０．５％～１０％の範囲が望ましい。
Next, the amount of organic thickener, powder glass and inorganic cement is 0.1% to 5% by weight of organic thickener and the weight percentage of powder glass is based on the total weight of the mixed material. A range of 0.5% to 10% and a weight percentage of inorganic cement of 0.5% to 10% is desirable.
このように混練された混合材料を、型に入れて成型し、脱型した後に乾燥させるが、まず、有機増粘剤（例えば澱粉）は、増膜性がよく、乾燥後の結合力も高いため、成形体の脱型乾燥時の保形の役割を果たす。すなわち、有機増粘剤は、常温～３００℃での垂直壁等の成形保持に貢献する。尚、有機増粘剤は、焼成過程では焼失する（約３００℃で焼失）ため保形性を失う欠点がある。
The mixed material thus kneaded is put into a mold, molded, demolded and then dried. First, organic thickeners (eg starch) have good film-thickness and high bonding strength after drying. It plays the role of shape retention during demolding and drying of the molded body. That is, the organic thickener contributes to the molding and holding of the vertical wall and the like at room temperature to 300 ° C. The organic thickener has a disadvantage that it loses its shape retaining property because it burns out in the firing process (burns out at about 300 ° C.).
一方、粉末ガラス（ガラスフリット）は、約６００℃～約１２００℃で軟化溶融して骨材１０の粒子の表面に密着し、冷却後は固化して高い結合力を発揮する。しかしながら、粉末ガラスは、軟化溶融温度に達するまでは結合力がなく、焼成時は軟化溶融しているため、混合材料が薄板状以外の形状の場合、有機増粘剤の接着効果がなくなった以降、焼成中の混合材料を所定形状に保形できない。
On the other hand, powdered glass (glass frit) softens and melts at about 600 ° C. to about 1200 ° C., adheres to the surface of the aggregate 10 particles, solidifies after cooling, and exhibits high bonding strength. However, the powdered glass has no binding force until the softening and melting temperature is reached, and since it is softened and melted at the time of firing, when the mixed material has a shape other than a thin plate, the adhesive effect of the organic thickener is lost. The mixed material being fired cannot be kept in a predetermined shape.
本願発明においては、従来の有機増粘剤と粉末ガラスとを混練した混合材料と異なり、無機セメントが混練されている。この無機セメントは、中間温度～焼成温度すなわち３００℃～６００℃で結合力を発揮することから、焼成の途中段階での垂直壁等の成形保持が可能となる。
In the present invention, an inorganic cement is kneaded unlike a mixed material obtained by kneading a conventional organic thickener and powdered glass. Since this inorganic cement exhibits a binding force at an intermediate temperature to a firing temperature, that is, 300 ° C. to 600 ° C., it becomes possible to form and hold a vertical wall or the like in the middle of firing.
上記のようなセラミックフィルター１の製造方法によれば、強度、耐食性に優れ、薄板状だけではなく、各種の形状のセラミックフィルター１～９等を提供でき、また、各種の形状のセラミックフィルター１～９等を一体成形できる。
According to the manufacturing method of the ceramic filter 1 as described above, it is excellent in strength and corrosion resistance, can provide not only a thin plate shape but also various shapes of ceramic filters 1 to 9 and the like, and various shapes of ceramic filters 1 to 9 etc. can be integrally formed.
実際に、成形できる形状としては、図１に示す円筒状で底のある坩堝状の他、図２の四角筒状で底のある坩堝状（枡状）のセラミックフィルター２や、図３の円筒状のセラミックフィルター３や、図４の円柱状のセラミックフィルター４等がある。また、図５の球状のセラミックフィルター５や、図６の半球状で坩堝状のセラミックフィルター６や、図７の楕円円筒状で底のある坩堝状のセラミックフィルター７や、図８の半楕円円筒状で底のある坩堝状のセラミックフィルター８のような形状もある。
Actually, shapes that can be formed include the cylindrical and bottomed crucible shape shown in FIG. 1, the square cylindrical bottomed crucible (bottom shape) ceramic filter 2 shown in FIG. 2, and the cylindrical shape shown in FIG. And the cylindrical ceramic filter 4 of FIG. Further, the spherical ceramic filter 5 of FIG. 5, the hemispherical crucible ceramic filter 6 of FIG. 6, the elliptic cylindrical bottomed crucible ceramic filter 7 of FIG. 7, and the semi-elliptical cylinder of FIG. There is also a shape like a crucible-shaped ceramic filter 8 with a bottom.
さらに、図９及び図１０に示すような、２室形状を有するセラミックフィルター９のような形状もある。セラミックフィルター９は、具体的には、略筒状で、内面（傾斜部３６）が下方に向かって傾斜する擂鉢状の上室部３０と、上室部３０の下部開口３２よりも径が大きい略筒状で、上室部３０の下方に設けられた下室部２０とを備えている。また、セラミックフィルター９は、上室部３０の擂鉢状の下部部分が、下室部２０の上部開口２２位置において、下室部２０の軸中心方向に突出し、逆止突起状（逆止突起部３４）である。尚、セラミックフィルター９は、図１０では、底２４があるようになっているが、底２４の有無はいずれであってもよい。
Further, there is a shape like a ceramic filter 9 having a two-chamber shape as shown in FIGS. Specifically, the ceramic filter 9 is substantially cylindrical and has a larger diameter than the upper chamber portion 30 having a bowl shape in which the inner surface (inclined portion 36) is inclined downward and the lower opening 32 of the upper chamber portion 30. The lower chamber part 20 provided in the substantially cylindrical shape and the downward direction of the upper chamber part 30 is provided. Further, the ceramic filter 9 has a mortar-shaped lower portion of the upper chamber portion 30 that protrudes in the axial center direction of the lower chamber portion 20 at the position of the upper opening 22 of the lower chamber portion 20, so 34). In addition, although the ceramic filter 9 has the bottom 24 in FIG. 10, the presence or absence of the bottom 24 may be any.
尚、図１～図１０に示す形状は、あくまでも一例で、立方体や直方体や、さらにもっと複雑な形状でも成形可能である。セラミックフィルターの形状（混合材料を成形する形状）としては、坩堝状が有用であり、特に、半球状、多角筒状、円筒状、楕円円筒状、半円円筒状又は半楕円円筒状であって、底のある坩堝状が有用である。さらに、セラミックフィルターの形状（混合材料を成形する形状）としては、球状、半球状、多角筒状、多角柱状、円筒状、円柱状、楕円円筒状、楕円円柱状、半円円筒状、半円円柱状、半楕円円筒状又は半楕円円柱状も有用である。
The shapes shown in FIGS. 1 to 10 are merely examples, and cubes, rectangular parallelepipeds, and even more complicated shapes can be formed. A crucible shape is useful as the shape of the ceramic filter (the shape for molding the mixed material), and in particular, hemispherical, polygonal cylindrical, cylindrical, elliptical cylindrical, semicircular cylindrical or semielliptical cylindrical A crucible with a bottom is useful. Furthermore, the shape of the ceramic filter (the shape for forming the mixed material) is spherical, hemispherical, polygonal cylindrical, polygonal columnar, cylindrical, cylindrical, elliptical cylindrical, elliptical cylindrical, semicircular cylindrical, semicircular A cylindrical shape, semi-elliptical cylindrical shape, or semi-elliptical cylindrical shape is also useful.
本発明は、本発明の広義の精神と範囲を逸脱することなく、様々な実施の形態及び変形が可能とされるものである。また、上述した実施形態は、本発明を説明するためのものであり、本発明の範囲を限定するものではない。つまり、本発明の範囲は、実施形態ではなく、請求の範囲によって示される。そして、請求の範囲内及びそれと同等の発明の意義の範囲内で施される様々な変形が、本発明の範囲内とみなされる。
The present invention is capable of various embodiments and modifications without departing from the broad spirit and scope of the present invention. Further, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.
本出願は、２０１６年５月３０日に出願された、日本国特許出願特願２０１６－１０７０１２号、２０１６年１０月３１日に出願された、日本国特許出願特願２０１６－２１３０２７号に基づく。本明細書中に日本国特許出願特願２０１６－１０７０１２号及び日本国特許出願特願２０１６－２１３０２７号の明細書、特許請求の範囲、図面全体を参照として取り込むものとする。
This application is based on Japanese Patent Application No. 2016-107012 filed on May 30, 2016, and Japanese Patent Application No. 2016-213027 filed on October 31, 2016. The specification, claims, and entire drawings of Japanese Patent Application No. 2016-107012 and Japanese Patent Application No. 2016-213027 are incorporated herein by reference.
以上のように、本発明によれば、強度、耐食性に優れ、薄板状だけではなく、各種のセラミックフィルターを提供し、また、各種の形状を一体成形できるセラミックフィルターの製造方法を提供することができる。
As described above, according to the present invention, it is excellent in strength and corrosion resistance, provides not only a thin plate shape, but also various ceramic filters, and also provides a method for producing a ceramic filter capable of integrally forming various shapes. it can.
１～９・・・セラミックフィルター
１０・・・・骨材
２０・・・・下室部
２２・・・・上部開口
２４・・・・底
３０・・・・上室部
３２・・・・下部開口
３４・・・・逆止突起部
３６・・・・傾斜部 1-9 ...Ceramic filter 10 ... Aggregate 20 ... Lower chamber part 22 ... Upper opening 24 ... Bottom 30 ... Upper chamber part 32 ... Lower part Opening 34... Check protrusion 36..
１０・・・・骨材
２０・・・・下室部
２２・・・・上部開口
２４・・・・底
３０・・・・上室部
３２・・・・下部開口
３４・・・・逆止突起部
３６・・・・傾斜部 1-9 ...
Claims (18)
- 金属溶湯中から不要物を除去するセラミックフィルターにおいて、
粒状のセラミックスからなる骨材に、結合剤として所定量の有機増粘剤と所定量の粉末ガラスと所定量の無機セメントと、適量の水を混練した混合材料とし、
該混合材料を成形した後、加熱及びその後冷却して該骨材を溶着させたことを特徴とするセラミックフィルター。 In a ceramic filter that removes unnecessary materials from molten metal,
Aggregate composed of granular ceramics, a mixed material in which a predetermined amount of organic thickener, a predetermined amount of powdered glass, a predetermined amount of inorganic cement, and an appropriate amount of water are kneaded as a binder,
A ceramic filter characterized in that the aggregate is deposited by heating and then cooling after molding the mixed material. - 前記セラミックスの骨材が、炭化ケイ素、窒化ケイ素、窒化ホウ素、ジルコン、ジルコニア若しくはアルミナのいずれか又はいずれか２種類以上を用いたものであることを特徴とする請求項１記載のセラミックフィルター。 2. The ceramic filter according to claim 1, wherein the ceramic aggregate is made of silicon carbide, silicon nitride, boron nitride, zircon, zirconia, alumina, or any two or more thereof.
- 前記混合材料の全体重量に対し、
前記有機増粘剤の重量パーセントが、０．１％～５％で、
前記粉末ガラスの重量パーセントが、０．５％～１０％で、
前記無機セメントの重量パーセントが、０．５％～１０％であることを特徴とする請求項１又は請求項２記載のセラミックフィルター。 With respect to the total weight of the mixed material,
The organic thickener has a weight percent of 0.1% to 5%,
The powder glass has a weight percentage of 0.5% to 10%,
The ceramic filter according to claim 1 or 2, wherein a weight percentage of the inorganic cement is 0.5% to 10%. - 前記骨材の最大粒径が、０．０１ｍｍ～１０ｍｍであることを特徴とする請求項１～請求項３のいずれかに記載のセラミックフィルター。 4. The ceramic filter according to claim 1, wherein the aggregate has a maximum particle size of 0.01 mm to 10 mm.
- 前記混合材料を、坩堝状に成形したことを特徴とする請求項１～請求項４のいずれかに記載のセラミックフィルター。 The ceramic filter according to any one of claims 1 to 4, wherein the mixed material is formed into a crucible shape.
- 前記混合材料を、半球状、多角筒状、円筒状、楕円円筒状、半円円筒状又は半楕円円筒状の坩堝状に成形したことを特徴とする請求項５記載のセラミックフィルター。 6. The ceramic filter according to claim 5, wherein the mixed material is formed into a hemispherical, polygonal cylindrical, cylindrical, elliptical cylindrical, semicircular cylindrical or semielliptical cylindrical crucible.
- 前記混合材料を、球状、半球状、多角筒状、多角柱状、円筒状、円柱状、楕円円筒状、楕円円柱状、半円円筒状、半円円柱状、半楕円円筒状又は半楕円円柱状に成形したことを特徴とする請求項１～請求項４のいずれかに記載のセラミックフィルター。 The mixed material is spherical, hemispherical, polygonal cylindrical, polygonal cylindrical, cylindrical, cylindrical, elliptical cylindrical, elliptical cylindrical, semicircular cylindrical, semicircular cylindrical, semielliptical cylindrical or semielliptical cylindrical The ceramic filter according to any one of claims 1 to 4, wherein the ceramic filter is formed into a shape.
- 前記混合材料を、略筒状で、内面が下方に向かって傾斜する擂鉢状の上室部と、該上室部の下部開口よりも径が大きい略筒状で、該上室部の下方に設けられた下室部とを有する形状に成形したことを特徴とする請求項１～請求項４のいずれかに記載のセラミックフィルター。 The mixed material is substantially cylindrical and has a bowl-shaped upper chamber portion whose inner surface is inclined downward, and a substantially cylindrical shape having a diameter larger than the lower opening of the upper chamber portion, below the upper chamber portion. The ceramic filter according to any one of claims 1 to 4, wherein the ceramic filter is formed into a shape having a provided lower chamber portion.
- 前記上室部の擂鉢状の下部部分が、前記下室部の上部開口部位置において、該下室部の軸中心方向に突出し、逆止突起状であることを特徴とする請求項８記載のセラミックフィルター。 The mortar-shaped lower portion of the upper chamber portion protrudes in the axial center direction of the lower chamber portion at the position of the upper opening of the lower chamber portion, and has a check protrusion shape. Ceramic filter.
- 金属溶湯中から不要物を除去するセラミックフィルターの製造方法において、
粒状のセラミックスからなる骨材に、結合剤として所定量の有機増粘剤と所定量の粉末ガラスと所定量の無機セメントと、適量の水を混練した混合材料とし、
該混合材料を成形した後、加熱及びその後冷却して該骨材を溶着させることを特徴とするセラミックフィルターの製造方法。 In the method of manufacturing a ceramic filter that removes unnecessary materials from molten metal,
Aggregate composed of granular ceramics, a mixed material in which a predetermined amount of organic thickener, a predetermined amount of powdered glass, a predetermined amount of inorganic cement, and an appropriate amount of water are kneaded as a binder,
A method for producing a ceramic filter, comprising forming the mixed material, heating and then cooling to weld the aggregate. - 前記セラミックスの骨材が、炭化ケイ素、窒化ケイ素、窒化ホウ素、ジルコン、ジルコニア若しくはアルミナのいずれか又はいずれか２種類以上を用いたものであることを特徴とする請求項１０載のセラミックフィルターの製造方法。 The ceramic filter according to claim 10, wherein the ceramic aggregate is made of silicon carbide, silicon nitride, boron nitride, zircon, zirconia, or alumina, or any two or more thereof. Method.
- 前記混合材料の全体重量に対し、
前記有機増粘剤の重量パーセントが、０．１％～５％で、
前記粉末ガラスの重量パーセントが、０．５％～１０％で、
前記無機セメントの重量パーセントが、０．５％～１０％であることを特徴とする請求項１０又は請求項１１記載のセラミックフィルターの製造方法。 With respect to the total weight of the mixed material,
The organic thickener has a weight percent of 0.1% to 5%,
The powder glass has a weight percentage of 0.5% to 10%,
The method for producing a ceramic filter according to claim 10 or 11, wherein a weight percentage of the inorganic cement is 0.5% to 10%. - 前記骨材の最大粒径が、０．０１ｍｍ～１０ｍｍであることを特徴とする請求項１０～請求項１２のいずれかに記載のセラミックフィルターの製造方法。 13. The method for producing a ceramic filter according to claim 10, wherein the aggregate has a maximum particle size of 0.01 mm to 10 mm.
- 前記混合材料を、坩堝状に成形することを特徴とする請求項１０～請求項１３のいずれかに記載のセラミックフィルターの製造方法。 The method for producing a ceramic filter according to any one of claims 10 to 13, wherein the mixed material is formed into a crucible shape.
- 前記混合材料を、半球状、多角筒状、円筒状、楕円円筒状、半円円筒状又は半楕円円筒状の坩堝状に成形することを特徴とする請求項１４記載のセラミックフィルターの製造方法。 The method of manufacturing a ceramic filter according to claim 14, wherein the mixed material is formed into a hemispherical, polygonal cylindrical, cylindrical, elliptical cylindrical, semicircular cylindrical or semielliptical cylindrical crucible.
- 前記混合材料を、球状、半球状、多角筒状、多角柱状、円筒状、円柱状、楕円円筒状、楕円円柱状、半円円筒状、半円円柱状、半楕円円筒状又は半楕円円柱状に成形することを特徴とする請求項１０～請求項１３のいずれかに記載のセラミックフィルターの製造方法。 The mixed material is spherical, hemispherical, polygonal cylindrical, polygonal cylindrical, cylindrical, cylindrical, elliptical cylindrical, elliptical cylindrical, semicircular cylindrical, semicircular cylindrical, semielliptical cylindrical or semielliptical cylindrical The method for producing a ceramic filter according to any one of claims 10 to 13, wherein the ceramic filter is molded into a shape.
- 前記混合材料を、略筒状で、内面が下方に向かって傾斜する擂鉢状の上室部と、該上室部の下部開口よりも径が大きい略筒状で、該上室部の下方に設けられた下室部とを有する形状に成形することを特徴とする請求項１０～請求項１３のいずれかに記載のセラミックフィルターの製造方法。 The mixed material is substantially cylindrical and has a bowl-shaped upper chamber portion whose inner surface is inclined downward, and a substantially cylindrical shape having a diameter larger than the lower opening of the upper chamber portion, below the upper chamber portion. The method for producing a ceramic filter according to any one of claims 10 to 13, wherein the ceramic filter is formed into a shape having a provided lower chamber portion.
- 前記上室部の擂鉢状の下部部分が、前記下室部の上部開口部位置において、該下室部の軸中心方向に突出し、逆止突起状であることを特徴とする請求項１７記載のセラミックフィルターの製造方法。 The mortar-shaped lower part of the upper chamber part protrudes in the axial center direction of the lower chamber part at the position of the upper opening of the lower chamber part, and has a check projection shape. Manufacturing method of ceramic filter.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2016-107012 | 2016-05-30 | ||
| JP2016107012 | 2016-05-30 | ||
| JP2016213027A JP2017214268A (en) | 2016-05-30 | 2016-10-31 | Ceramic filter and production method of ceramic filter |
| JP2016-213027 | 2016-10-31 |
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| WO2017208913A1 true WO2017208913A1 (en) | 2017-12-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02247337A (en) * | 1989-03-22 | 1990-10-03 | Nippon Light Metal Co Ltd | Filter for filtering aluminum molten metal and its manufacture |
| JPH04301040A (en) * | 1991-03-28 | 1992-10-23 | Ngk Insulators Ltd | Filter medium for molten metal |
| JP2002159810A (en) * | 2000-11-22 | 2002-06-04 | Kao Corp | Filter |
| WO2011043150A1 (en) * | 2009-10-09 | 2011-04-14 | 三井金属鉱業株式会社 | Filter for aluminum melt |
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2017
- 2017-05-23 WO PCT/JP2017/019287 patent/WO2017208913A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02247337A (en) * | 1989-03-22 | 1990-10-03 | Nippon Light Metal Co Ltd | Filter for filtering aluminum molten metal and its manufacture |
| JPH04301040A (en) * | 1991-03-28 | 1992-10-23 | Ngk Insulators Ltd | Filter medium for molten metal |
| JP2002159810A (en) * | 2000-11-22 | 2002-06-04 | Kao Corp | Filter |
| WO2011043150A1 (en) * | 2009-10-09 | 2011-04-14 | 三井金属鉱業株式会社 | Filter for aluminum melt |
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