JPH04228507A - Device for producing metal powder - Google Patents
Device for producing metal powderInfo
- Publication number
- JPH04228507A JPH04228507A JP40836090A JP40836090A JPH04228507A JP H04228507 A JPH04228507 A JP H04228507A JP 40836090 A JP40836090 A JP 40836090A JP 40836090 A JP40836090 A JP 40836090A JP H04228507 A JPH04228507 A JP H04228507A
- Authority
- JP
- Japan
- Prior art keywords
- cooling liquid
- coolant
- layer
- cylinder
- peripheral surface
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 43
- 239000002184 metal Substances 0.000 title claims abstract description 43
- 239000000843 powder Substances 0.000 title claims abstract description 29
- 239000002826 coolant Substances 0.000 claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000000110 cooling liquid Substances 0.000 claims description 44
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、溶融金属を旋回移動す
る冷却液層中に噴射して金属粉末を製造する装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing metal powder by injecting molten metal into a rotating cooling liquid layer.
【０００２】0002
【従来の技術】急冷凝固金属粉末は、結晶粒が微細で合
金元素も過飽和に含有させることができるので、例えば
アルミニウムやその合金の急冷凝固粉末によって形成さ
れた押出材は、溶製材では具備することのない優れた材
質特性を有し、機械部品等の素材として注目されている
。[Prior Art] Rapidly solidified metal powder has fine crystal grains and can contain supersaturated alloying elements. For example, an extruded material formed from rapidly solidified powder of aluminum or its alloy has It has exceptional material properties and is attracting attention as a material for mechanical parts.
【０００３】前記急冷凝固金属粉末の好適な製造方法と
して、回転ドラム法がある。この方法は、図３で示すよ
うに、回転する冷却ドラム６１の内周面に冷却液層６２
を遠心力の作用で作成し、該冷却液層６２に溶融金属を
噴射し、微細に分断して急冷凝固した金属粉末を得る方
法である。同図において、６３は溶融金属噴射手段とし
ての噴射るつぼであり、その外周面には加熱用の高周波
コイル６４が装着され、その下部側壁には噴射ノズル６
５が開設されている。前記るつぼ６３内の溶融金属６６
は、該るつぼ６３に不活性ガス６７を加圧注入すること
によって前記ノズル６５から噴出される。そして、冷却
ドラム６１内の金属粉末は、一定量溜まると、冷却ドラ
ム６１の回転を止め、冷却液と共に回収され、脱液後、
乾燥される。[0003] A preferred method for producing the rapidly solidified metal powder is a rotating drum method. In this method, as shown in FIG. 3, a cooling liquid layer 62 is formed on the inner peripheral surface of a rotating cooling drum 61.
This is a method in which molten metal is created by the action of centrifugal force, and molten metal is injected into the coolant layer 62 to obtain finely divided metal powder that is rapidly solidified. In the same figure, 63 is an injection crucible serving as a molten metal injection means, a high frequency coil 64 for heating is attached to the outer peripheral surface of the crucible, and an injection nozzle 6 is attached to the lower side wall of the crucible.
5 have been established. Molten metal 66 in the crucible 63
is ejected from the nozzle 65 by injecting an inert gas 67 into the crucible 63 under pressure. When a certain amount of metal powder accumulates in the cooling drum 61, the rotation of the cooling drum 61 is stopped and the metal powder is collected together with the cooling liquid.
dried.
【０００４】0004
【発明が解決しようとする課題】しかしながら、回転ド
ラム法では、いわゆるバッチ式操業となり、生産性が劣
る。そのうえ、粉末回収時に溶融金属の噴射を止めなけ
ればならないため、ノズルに孔詰りが生じ易いという問
題がある。また、冷却温度を一定にするためには、冷却
液層の液面より冷却液を供給、排出して温度制御しなけ
ればならないが、この際、液面が乱れ、粉末粒度や品質
にばらつきが生じ易いという問題があった。However, the rotating drum method involves a so-called batch operation, resulting in poor productivity. Furthermore, since the injection of molten metal must be stopped during powder recovery, there is a problem in that the nozzle is likely to become clogged. In addition, in order to keep the cooling temperature constant, the temperature must be controlled by supplying and discharging the cooling liquid from the liquid level of the cooling liquid layer, but in this case, the liquid level is disturbed and the powder particle size and quality may vary. There was a problem that it was easy to occur.
【０００５】本発明はかかる問題に鑑みなされたもので
、安定した品質の金属粉末を連続的に生産することがで
きる金属粉末の製造装置を提供することを目的とする。The present invention was made in view of the above problem, and an object thereof is to provide a metal powder manufacturing apparatus that can continuously produce metal powder of stable quality.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
になされた本発明の製造装置は、内周面に沿って接線方
向から冷却液を噴出供給するための冷却液噴出管７が設
けられた冷却用筒体１と、前記冷却液噴出管７より噴出
された冷却液によって前記筒体１の内周面に形成された
冷却液層２１に溶融金属を噴射するための溶融金属噴射
手段２と、前記冷却液噴出管７に冷却液を供給するため
の冷却液供給手段３とを備え、前記筒体１の内周面には
冷却液層２１の層厚調整用リング６Ａが装着され、その
上部に冷却液噴出管７が複数段設けられている。この場
合、隣接する冷却液噴出管７の段間に層厚調整用リング
６Ｂが装着するとよい。[Means for Solving the Problems] The manufacturing apparatus of the present invention, which has been made to solve the above problems, is provided with a cooling liquid jetting pipe 7 for jetting and supplying cooling liquid from a tangential direction along the inner peripheral surface. a cooling cylinder 1 and a molten metal injection means 2 for injecting molten metal onto a cooling liquid layer 21 formed on the inner circumferential surface of the cylinder 1 by the cooling liquid jetted from the cooling liquid jetting pipe 7. and a coolant supply means 3 for supplying the coolant to the coolant jet pipe 7, and a ring 6A for adjusting the layer thickness of the coolant layer 21 is attached to the inner peripheral surface of the cylinder 1. A plurality of cooling liquid ejection pipes 7 are provided in the upper part thereof. In this case, it is preferable to install a layer thickness adjustment ring 6B between adjacent stages of the coolant jet pipes 7.
【０００７】[0007]
【作用】筒体１の内周面に沿って冷却液噴出管７の吐出
口８より噴出された冷却液は、筒体１の内周面に沿って
旋回しながら流下し、層厚調整用リング６Ａをオーバー
フローして下方へ流出する。この際、前記層厚調整用リ
ング６Ａの上部には冷却液噴出管７が複数段設けられて
いるので、前記リング６Ａの上部で冷却液の流下速度の
増大による冷却液層２１の層厚の減少を防止することが
でき、筒体１の内周面にほぼ一定内径、一定旋回流速の
冷却液層２１を長い範囲で形成することができる。この
際、隣接する冷却液噴出管７の段間にも層厚調整用リン
グ６Ｂを装着することにより、冷却液層２１の層厚、流
速の安定性を向上させることができる。[Operation] The coolant jetted from the discharge port 8 of the coolant jet pipe 7 along the inner peripheral surface of the cylinder 1 flows down while swirling along the inner peripheral surface of the cylinder 1, and is used for layer thickness adjustment. It overflows the ring 6A and flows downward. At this time, since a plurality of coolant jet pipes 7 are provided above the layer thickness adjustment ring 6A, the thickness of the coolant layer 21 is adjusted by increasing the flow rate of the coolant at the top of the ring 6A. The cooling liquid layer 21 having a substantially constant inner diameter and a constant swirling flow rate can be formed over a long range on the inner circumferential surface of the cylinder 1. At this time, the thickness of the cooling liquid layer 21 and the stability of the flow rate can be improved by installing the layer thickness adjustment ring 6B between adjacent stages of the cooling liquid jetting pipes 7.
【０００８】該冷却液層２１は、常に新たに供給する冷
却液によって形成されるため、一定の温度が容易に維持
される。従って、温度制御のために液面より冷却液を供
給、排出する必要がなく、液面に乱れが生じにくく、安
定性に優れる。上部の冷却液層２１の内周面に溶融金属
を噴射供給すると、溶融金属は旋回流によって分断され
、急冷凝固され、金属粉末が連続生産される。この粉末
は、温度や液面状態が安定な冷却液層２１によって形成
され、十分冷却されるため、品質の安定性に優れる。[0008] Since the cooling liquid layer 21 is formed by constantly newly supplied cooling liquid, a constant temperature can be easily maintained. Therefore, there is no need to supply or discharge cooling liquid from the liquid level for temperature control, and the liquid level is less likely to be disturbed, resulting in excellent stability. When molten metal is injected and supplied to the inner circumferential surface of the upper cooling liquid layer 21, the molten metal is divided by the swirling flow, rapidly solidified, and metal powder is continuously produced. This powder is formed by the cooling liquid layer 21 whose temperature and liquid level are stable, and is sufficiently cooled, so that it has excellent quality stability.
【０００９】[0009]
【実施例】図１は実施例に係る金属粉末製造装置を示し
ており、内周面に粉化および冷却用の冷却液層２１を形
成するための冷却用筒体１と、冷却液層２１に溶融金属
２３を噴射供給するための手段である噴射るつぼ２と、
前記筒体１に冷却液を供給するための手段であるポンプ
３を備えている。[Embodiment] FIG. 1 shows a metal powder manufacturing apparatus according to an embodiment, which includes a cooling cylinder 1 for forming a cooling liquid layer 21 for powdering and cooling on the inner peripheral surface, and a cooling liquid layer 21 for forming a cooling liquid layer 21 on the inner peripheral surface. an injection crucible 2 which is a means for injecting and supplying molten metal 23 to
A pump 3 is provided as a means for supplying cooling liquid to the cylindrical body 1.
【００１０】前記筒体１は、円筒形状であり、その上端
には中心部に適宜大きさの開口４を有する蓋体５が被着
形成されている。筒体１の内周面には冷却液噴出管７の
吐出口８が複数段開口しており、該噴出管７の管軸方向
は筒体内周面のやや斜め下方の接線方向に設定されてい
る。筒体１の下部内周面には、冷却液層２１の層厚調整
用リング６Ａがボルトによって着脱、交換自在に取り付
けられている。該リング６Ａの上面は下方に縮径される
テーパー面で形成されている。The cylinder 1 has a cylindrical shape, and a lid 5 having an appropriately sized opening 4 in the center is attached to its upper end. A plurality of discharge ports 8 of a coolant jet pipe 7 are opened on the inner peripheral surface of the cylinder 1, and the pipe axis direction of the jet pipe 7 is set in a tangential direction slightly diagonally downward to the inner peripheral surface of the cylinder. There is. A ring 6A for adjusting the layer thickness of the cooling liquid layer 21 is attached to the lower inner circumferential surface of the cylindrical body 1 with a bolt so as to be detachable and replaceable. The upper surface of the ring 6A is formed with a tapered surface whose diameter is reduced downward.
【００１１】冷却液噴出管７の段数、間隔は、筒体内径
、冷却液の吐出量、噴出圧力、層厚調整用リング６Ａの
設定距離等により異なるが、ほぼ一定内径の冷却液層２
１が得られるように適宜の段数を略等間隔に設ければよ
い。筒体１の下端には、円筒状の液切り用網体９が連設
され、更にその下端には粉末回収用の漏斗体１０が取り
付けられている。また、前記網体９の回りにはカバー１
１が設けられている。The number of stages and the spacing of the coolant jet pipes 7 vary depending on the inner diameter of the cylinder, the discharge amount of the coolant, the jet pressure, the set distance of the layer thickness adjustment ring 6A, etc., but the coolant layer 2 has a substantially constant inner diameter.
An appropriate number of stages may be provided at approximately equal intervals so that 1 is obtained. A cylindrical liquid draining net 9 is connected to the lower end of the cylinder 1, and a powder recovery funnel 10 is attached to the lower end. Further, a cover 1 is provided around the net body 9.
1 is provided.
【００１２】前記冷却液噴出管７は、ポンプ３を介して
タンク１２を配管接続されている。また、前記カバー１
１の底部はタンク１２に配管されており、カバー１１に
よって回収された冷却液はタンク１２に戻され、循環使
用される。尚、タンク１２には、図示省略の補給用の冷
却液供給管が設けられ、またタンク内や循環流路の途中
に冷却器を適宜介在させてもよい。冷却液としては一般
に水が使用される。The coolant jetting pipe 7 is connected to a tank 12 via a pump 3. In addition, the cover 1
The bottom of the tank 1 is piped to a tank 12, and the coolant collected by the cover 11 is returned to the tank 12 and used for circulation. The tank 12 is provided with a cooling liquid supply pipe for replenishment (not shown), and a cooler may be appropriately interposed within the tank or in the middle of the circulation flow path. Water is generally used as the coolant.
【００１３】前記蓋体５の上部には、溶融金属供給手段
としての噴射るつぼ２が設けられており、その外周には
加熱用コイル１４が巻回形成され、その底部にはノズル
孔１５が開設されている。噴射るつぼ２にはＡｒ やＮ
２ 等の不活性ガスや溶融金属が圧送され、るつぼ２内
の溶融金属２３が前記ノズル孔１５より冷却液層２１に
噴射される。An injection crucible 2 serving as a molten metal supply means is provided on the upper part of the lid 5, a heating coil 14 is wound around the outer periphery of the crucible 2, and a nozzle hole 15 is provided at the bottom of the crucible 2. has been done. Injection crucible 2 contains Ar and N.
Inert gas such as 2 and molten metal are pumped, and molten metal 23 in crucible 2 is injected into cooling liquid layer 21 from the nozzle hole 15.
【００１４】本発明を実施するには、まずポンプ３を作
動させて、筒体１の内周面に高速旋回しながら流下する
冷却液層２１を形成する。次に、筒体１の上部に設けら
れた噴射るつぼ２にＡｒ ガス等を圧送して、るつぼ２
内の溶融金属２３をノズル孔１５より冷却液層２１の上
部内面に向けて噴射する。噴射された溶融金属流は、層
厚、流速がほぼ一定の冷却液層２１の旋回流により粉化
、急冷凝固されると共に、冷却液層２１を流下する間に
十分冷却されるので、冷却状態が均質でほぼ一定粒径の
粉末が製造される。To carry out the present invention, first, the pump 3 is operated to form a cooling liquid layer 21 on the inner circumferential surface of the cylindrical body 1, which flows down while swirling at high speed. Next, Ar gas or the like is force-fed to the injection crucible 2 provided at the top of the cylinder 1, and the crucible 2
The molten metal 23 inside is injected from the nozzle hole 15 toward the upper inner surface of the cooling liquid layer 21. The injected molten metal flow is pulverized and rapidly solidified by the swirling flow of the cooling liquid layer 21 whose layer thickness and flow rate are approximately constant, and is sufficiently cooled while flowing down the cooling liquid layer 21, so that the cooling state is maintained. A homogeneous powder with approximately constant particle size is produced.
【００１５】急冷凝固した金属粉末は、冷却液層２１を
形成した冷却液と共に筒体１の下端開口より網体９に送
り込まれる。冷却液の大部分は、漏斗体１０に流下する
までに、冷却液自体のもつ遠心力の作用で網体９によっ
て放射方向に分離排出される。一方、網体９によって一
次脱液された金属粉末は、漏斗体１０を介して排出され
、順次、遠心分離機等の適宜の脱液装置にかけることに
より、短時間で液分がほとんどなくなり、容易に乾燥さ
れ、製品粉末となる。The rapidly solidified metal powder is fed into the net 9 through the opening at the lower end of the cylindrical body 1 together with the cooling liquid forming the cooling liquid layer 21 . Most of the coolant is separated and discharged in the radial direction by the net 9 due to the centrifugal force of the coolant itself before flowing down into the funnel body 10. On the other hand, the metal powder that has been primarily deliquified by the mesh body 9 is discharged through the funnel body 10, and is sequentially passed through a suitable deliquid device such as a centrifuge, so that almost no liquid content is left in a short time. It is easily dried and becomes a product powder.
【００１６】図２は他の実施例に係る金属粉末製造装置
を示しており、第１実施例と同部材は同符号で示してい
る。この例では、複数段設けられた冷却液噴出管７の隣
接する段間にも各々層厚調整用リング６Ｂが装着されて
いる。これによって、冷却液層２１の層厚、流速をより
一層安定させることができる。FIG. 2 shows a metal powder manufacturing apparatus according to another embodiment, in which the same members as in the first embodiment are designated by the same symbols. In this example, layer thickness adjustment rings 6B are also installed between adjacent stages of the coolant jet pipes 7 provided in a plurality of stages. Thereby, the thickness and flow rate of the cooling liquid layer 21 can be further stabilized.
【００１７】[0017]
【発明の効果】以上説明した通り、本発明の金属粉末製
造装置は、筒体の内周面に冷却液層の層厚調整用リング
が装着され、その上部に筒体内周面に沿って接続方向か
ら冷却液を噴出供給するための冷却液噴出管が複数段設
けられているので、ほぼ一定内径、一定温度、一定流速
で冷却区間の長い冷却液層が容易に形成される。従って
、該冷却液層中に溶融金属を噴射供給することにより、
一定条件で粉化され、十分冷却された品質一定の急冷凝
固粉末が連続的に生産され、噴射ノズルに孔詰りも生じ
ない。[Effects of the Invention] As explained above, in the metal powder manufacturing apparatus of the present invention, a ring for adjusting the thickness of the cooling liquid layer is attached to the inner peripheral surface of the cylinder, and the ring is connected to the upper part of the ring along the inner peripheral surface of the cylinder. Since a plurality of stages of cooling liquid ejection pipes are provided for jetting and supplying cooling liquid from different directions, a cooling liquid layer with a long cooling section can be easily formed with a substantially constant inner diameter, constant temperature, and constant flow rate. Therefore, by injecting molten metal into the cooling liquid layer,
Pulverized under certain conditions, sufficiently cooled, and rapidly solidified powder of constant quality is continuously produced, and the injection nozzle does not become clogged.
【図１】実施例に係る金属粉末製造装置の要部断面説明
図である。FIG. 1 is an explanatory cross-sectional view of a main part of a metal powder manufacturing apparatus according to an example.
【図２】他の実施例に係る金属粉末製造装置の要部断面
説明図である。FIG. 2 is an explanatory cross-sectional view of a main part of a metal powder manufacturing apparatus according to another embodiment.
【図３】従来の金属粉末製造装置の要部断面説明図であ
る。FIG. 3 is an explanatory cross-sectional view of a main part of a conventional metal powder manufacturing apparatus.
１ 冷却用筒体
２ 噴射るつぼ（溶融金属噴射手段）３ ポンプ（
冷却液供給手段）
６Ａ 層厚調整用リング
６Ｂ 層厚調整用リング
７ 冷却液噴出管
９ 液切り用網体
２１ 冷却液層1 Cooling cylinder 2 Injection crucible (molten metal injection means) 3 Pump (
Coolant supply means) 6A Layer thickness adjustment ring 6B Layer thickness adjustment ring 7 Coolant jet pipe 9 Liquid draining net 21 Coolant layer
Claims (2)
噴出供給するための冷却液噴出管（７）が設けられた冷
却用筒体（１）と、前記冷却液噴出管（７）より噴出さ
れた冷却液によって前記筒体（１）の内周面に形成され
た冷却液層（２１）に溶融金属を噴射するための溶融金
属噴射手段（２）と、前記冷却液噴出管（７）に冷却液
を供給するための冷却液供給手段（３）とを備え、前記
筒体（１）の内周面には冷却液層（２１）の層厚調整用
リング（６Ａ）が装着され、その上部に冷却液噴出管（
７）が複数段設けられていることを特徴とする金属粉末
製造装置。1. A cooling cylinder (1) provided with a cooling liquid jetting pipe (7) for jetting and supplying a cooling liquid from a tangential direction along an inner peripheral surface, and the cooling liquid jetting pipe (7). a molten metal injection means (2) for injecting molten metal onto a cooling liquid layer (21) formed on the inner peripheral surface of the cylindrical body (1) by the cooling liquid ejected from the cylinder; 7), and a ring (6A) for adjusting the layer thickness of the cooling liquid layer (21) is attached to the inner peripheral surface of the cylinder (1). and a coolant spout pipe (
7) A metal powder manufacturing apparatus characterized in that a plurality of stages are provided.
層厚調整用リング（６Ｂ）が装着されている請求項１に
記載された金属粉末製造装置。2. The metal powder manufacturing apparatus according to claim 1, wherein a layer thickness adjusting ring (6B) is installed between the stages of adjacent coolant jetting pipes (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40836090A JPH07100805B2 (en) | 1990-12-27 | 1990-12-27 | Metal powder manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40836090A JPH07100805B2 (en) | 1990-12-27 | 1990-12-27 | Metal powder manufacturing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04228507A true JPH04228507A (en) | 1992-08-18 |
| JPH07100805B2 JPH07100805B2 (en) | 1995-11-01 |
Family
ID=18517821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40836090A Expired - Lifetime JPH07100805B2 (en) | 1990-12-27 | 1990-12-27 | Metal powder manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07100805B2 (en) |
-
1990
- 1990-12-27 JP JP40836090A patent/JPH07100805B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07100805B2 (en) | 1995-11-01 |
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