JP2003027104A - Method for manufacturing aggregate composed of inorganic powder such as metal powder or ceramic powder, and method for processing the aggregate - Google Patents
Method for manufacturing aggregate composed of inorganic powder such as metal powder or ceramic powder, and method for processing the aggregateInfo
- Publication number
- JP2003027104A JP2003027104A JP2001214949A JP2001214949A JP2003027104A JP 2003027104 A JP2003027104 A JP 2003027104A JP 2001214949 A JP2001214949 A JP 2001214949A JP 2001214949 A JP2001214949 A JP 2001214949A JP 2003027104 A JP2003027104 A JP 2003027104A
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- JP
- Japan
- Prior art keywords
- powder
- aggregate
- metal
- ceramic
- processing
- 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.)
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- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属粉末またはセ
ラミックス粉末等の無機粉末から凝結体を製造する方法
および製造された凝結体を加工する方法に関する。TECHNICAL FIELD The present invention relates to a method for producing an aggregate from an inorganic powder such as a metal powder or a ceramic powder and a method for processing the produced aggregate.
【０００２】[0002]
【従来の技術】従来、迅速な成形技術、ラピッドプロト
タイプの技術として、様々な方法が出現してきている。
その中心的手法として光造形法、溶融したプラスチック
を積層する方法、紙などを積層していく手法などが提案
されている。しかし、これらの手法で金属あるいはセラ
ミックス製品を成形することは難しく、金属粉を焼結し
ていく手法、金属あるいはセラミックス粉を含ませたフ
ィラーを積層していく手法などがあるのみである。ま
た、従来の機械切削加工の延長として高速回転ミーリン
グ装置による高い送り速度での金属、その他の材料の加
工をし、高速に成形する試みが行われているが、そのた
めの加工装置はきわめて高価である。2. Description of the Related Art Conventionally, various methods have emerged as rapid molding technology and rapid prototype technology.
As a central method, a stereolithography method, a method of laminating molten plastics, a method of laminating papers, etc. have been proposed. However, it is difficult to mold a metal or ceramic product by these methods, and there are only methods such as sintering metal powder and laminating a filler containing metal or ceramic powder. In addition, as an extension of conventional mechanical cutting, it has been attempted to process metal and other materials at a high feed rate with a high-speed rotary milling device and form at high speed, but the processing device for that is extremely expensive. is there.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、容易に機械
加工できる材料だけでなく、硬度が大きく難加工材に分
類される材料においても迅速な加工を可能とするととも
に、難加工材による複雑形状製品および型などの製品の
迅速かつ簡便な成形を可能とすることを目的とする。The present invention enables not only a material that can be easily machined, but also a material that is classified as a difficult-to-machine material because of its high hardness, and that it is complicated by the difficult-to-machine material. The object is to enable rapid and simple molding of products such as shaped products and molds.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記の目的を
達成するため、 金属粉末またはセラミックス粉末等の
無機粉末を水溶性ポリマーの水溶液で混合、混練させ、
この混練物を必要な形状に鋳込み、その後、ゲル化、乾
燥させることにより成形された凝結体を得ることを特徴
とする。また、本発明は、得られた凝結体を機械加工
し、焼結することにより金属製品またはセラミックス製
品を得ることを特徴とする。[Means for Solving the Problems] In order to achieve the above object, the present invention comprises mixing and kneading an inorganic powder such as a metal powder or a ceramic powder with an aqueous solution of a water-soluble polymer,
This kneaded product is cast into a required shape, and then gelled and dried to obtain a molded aggregate. Further, the present invention is characterized in that a metal product or a ceramic product is obtained by machining and sintering the obtained aggregate.
【０００５】[0005]
【発明の実施の形態】以下、本発明による実施の形態を
説明する。まず、成形できる材料としては、ステンレス
合金、貴金属粉、超硬合金粉、工具綱粉、チタン系合金
粉など水と接触させても急激に酸化しない金属粉末、ま
たは、アルミナ、ジルコニアなど大多数のセラミックス
がある。水溶性ポリマーとしては、ポリビニールアルコ
ール、メチルセルロース、フェノール樹脂などが利用で
きる。これらのうちいずれかを、2〜50mass％含む水溶
液を用いる。この水溶液と金属粉末またはセラミックス
粉末を体積比で１：４〜４：１で混練、脱泡してスラリ
ーあるいは泥状にする。脱泡には脱泡剤の混入、真空脱
泡あるいは成型時の加圧等を利用する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. First, as materials that can be molded, metal powders that do not rapidly oxidize when contacted with water, such as stainless alloys, precious metal powders, cemented carbide powders, tool steel powders, and titanium alloy powders, or the majority of alumina, zirconia, etc. There is ceramics. As the water-soluble polymer, polyvinyl alcohol, methyl cellulose, phenol resin, etc. can be used. An aqueous solution containing 2 to 50 mass% of any of these is used. This aqueous solution and metal powder or ceramic powder are kneaded at a volume ratio of 1: 4 to 4: 1 and defoamed to form a slurry or a mud. For defoaming, use of a defoaming agent, vacuum defoaming, or pressurization during molding is used.
【０００６】次いで、この混練物を型に流し込み、ゲル
化後、乾燥させることによって凝結体を得る。ポリビニ
ールアルコールを用いる場合、ポリビニールアルコール
として鹸化度が高く、分子量が高いものを用い、凍結さ
せたままゲル化させることにより成形する。メチルセル
ロースを用いた場合は80℃程度に加熱することによって
ゲル化させる。フェノール樹脂を用いた場合は、ゲル化
剤の添加によりゲル化させる。このような凝結体は容易
に機械加工、切削加工が可能であり、エンジニアリング
ワックス、プラスチック、発泡スチロールなどを加工対
象とした簡便な機械加工装置により容易かつ迅速に加工
することができる。現在ではＳＴＬ（StandardTemplate
Library）データあるいはＤＸＦ（米国Autodesk社が規
定しているDrauing Interchange File）データにより簡
便に三次元形状の造形が可能な安価な装置が販売されて
おり、これらの加工装置により凝結体は容易に形状が付
与される。また、剛性の低いロボットアームにドリルを
付属させた加工装置でも加工が可能である。Next, the kneaded product is poured into a mold, gelled, and dried to obtain a coagulated product. When polyvinyl alcohol is used, one having a high degree of saponification and a high molecular weight is used as the polyvinyl alcohol, and it is formed by gelling while frozen. When methylcellulose is used, it is heated to about 80 ° C to cause gelation. When a phenol resin is used, it is gelled by adding a gelling agent. Such an aggregate can be easily machined and cut, and can be easily and quickly machined by a simple machining apparatus for processing engineering wax, plastic, styrofoam, and the like. Currently STL (Standard Template)
Library) data or DXF (Drauing Interchange File) data provided by Autodesk, Inc. in the US are available as inexpensive devices that can easily create a three-dimensional shape. These processing devices make it easy to form aggregates. Is given. It is also possible to process with a processing device in which a drill is attached to a robot arm with low rigidity.
【０００７】所望の形状に機械加工した後、粉末材料に
応じた雰囲気、温度で焼結すれば、相似な形状に収縮し
た製品を得ることができる。この方法において望む寸法
の製品を得ようとするには、焼結後の収縮率を見込んで
大きい形状に加工し、その後、焼結を行えばよい。ま
た、粉体よりも低融点の金属を含浸させれば、収縮させ
ずに製品を得ることができる。ステンレス粉を用いた場
合、溶融した銅を含浸材として利用できる。After machining into a desired shape and sintering in an atmosphere and at a temperature suitable for the powder material, a product contracted into a similar shape can be obtained. In order to obtain a product having a desired size by this method, it is sufficient to process it into a large shape in consideration of the shrinkage rate after sintering, and then perform sintering. Further, if a metal having a melting point lower than that of powder is impregnated, a product can be obtained without shrinking. When stainless powder is used, molten copper can be used as an impregnating material.
【０００８】[0008]
【実施例】金属粉末として、平均粒径6.3μｍのＳＵＳ
３０４Ｌステンレス粉末を用いた。ポリビニールアルコ
ールの4％水溶液とこのステンレス粉末を体積比６：４
で混合しスラリーとした。スラリーは真空脱泡装置によ
り脱泡し、そのまま鋳込んで凍結して２４時間保持し
た。解凍後、60℃に保持された恒温槽で乾燥する。乾燥
した成形体を模型切削加工装置により切削し、ＤＸＦフ
ァイルで与えられる形状に成形した。この成形体を1350
℃の水素雰囲気中で2時間焼結することにより、密度96
％、収縮率約２０％の製品を得ることができた。[Example] As a metal powder, SUS having an average particle size of 6.3 μm
304L stainless powder was used. The volume ratio of this 4% aqueous solution of polyvinyl alcohol and this stainless steel powder is 6: 4.
And mixed into a slurry. The slurry was defoamed by a vacuum defoaming device, cast as it was, frozen and held for 24 hours. After thawing, dry in a constant temperature bath maintained at 60 ° C. The dried molded body was cut by a model cutting device and molded into a shape given by a DXF file. 1350 this molded body
Density of 96
%, And the shrinkage rate was about 20%.
【０００９】[0009]
【発明の効果】金属粉末またはセラミックス粉末を水溶
性ポリマーの水溶液で凝結させた加工しやすい粉体の凝
結体をブロック状あるいはほぼ必要な形状に鋳込み、そ
の後、ゲル化、乾燥させて必要な形状に近い凝結体を製
造し、さらに、得られた凝結体を機械加工し、焼結する
という手法を採用することにより、容易に機械加工でき
る材料だけでなく、硬度が高く難加工材に分類される材
料においても迅速な加工が可能となる。また、この手法
により、難加工材による複雑形状製品および型などの製
品の迅速かつ簡便な成形が可能となった。[Effects of the Invention] Metal powder or ceramic powder is coagulated with an aqueous solution of a water-soluble polymer, and an aggregate of powder that is easy to process is cast into a block shape or a substantially required shape, and then gelled and dried to obtain the required shape. By adopting the method of manufacturing a condensate close to the above, and further machining and sintering the obtained condensate, it is not only a material that can be easily machined, but also a material with high hardness and difficult to process. It enables rapid processing even for materials In addition, this method has enabled rapid and simple molding of products such as complicated shapes and molds made of difficult-to-process materials.
Claims (2)
機粉末を水溶性ポリマーの水溶液で混合、混練させ、こ
の混練物を必要な形状に鋳込み、その後、ゲル化、乾燥
させることにより成形された凝結体を得ることを特徴と
する金属粉末またはセラミックス粉末等の無機粉末から
なる凝結体の製造方法。1. An aggregate formed by mixing and kneading an inorganic powder such as a metal powder or a ceramic powder with an aqueous solution of a water-soluble polymer, casting the kneaded product into a required shape, and then gelling and drying the mixture. A method for producing a condensate made of inorganic powder such as metal powder or ceramic powder.
焼結することにより、金属製品またはセラミックス製品
を得ることを特徴とする凝結体の加工方法。2. The aggregate obtained in claim 1 is machined,
A method for processing an aggregate, which comprises obtaining a metal product or a ceramic product by sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001214949A JP2003027104A (en) | 2001-07-16 | 2001-07-16 | Method for manufacturing aggregate composed of inorganic powder such as metal powder or ceramic powder, and method for processing the aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001214949A JP2003027104A (en) | 2001-07-16 | 2001-07-16 | Method for manufacturing aggregate composed of inorganic powder such as metal powder or ceramic powder, and method for processing the aggregate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003027104A true JP2003027104A (en) | 2003-01-29 |
Family
ID=19049679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001214949A Pending JP2003027104A (en) | 2001-07-16 | 2001-07-16 | Method for manufacturing aggregate composed of inorganic powder such as metal powder or ceramic powder, and method for processing the aggregate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003027104A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010052408A (en) * | 2008-08-30 | 2010-03-11 | Nagaoka Univ Of Technology | Ceramic calcined body with fine uneven pattern on surface and method for manufacturing the same |
-
2001
- 2001-07-16 JP JP2001214949A patent/JP2003027104A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010052408A (en) * | 2008-08-30 | 2010-03-11 | Nagaoka Univ Of Technology | Ceramic calcined body with fine uneven pattern on surface and method for manufacturing the same |
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