JPS60141808A - Production of metallic flake solidified by quick cooling - Google Patents
Production of metallic flake solidified by quick coolingInfo
- Publication number
- JPS60141808A JPS60141808A JP24551483A JP24551483A JPS60141808A JP S60141808 A JPS60141808 A JP S60141808A JP 24551483 A JP24551483 A JP 24551483A JP 24551483 A JP24551483 A JP 24551483A JP S60141808 A JPS60141808 A JP S60141808A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- droplets
- water
- flakes
- cooled
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明は、フレーク状の金属粉末を製造する方法に関す
る。詳しくは、ノズルから流出する金属溶湯を霧化し、
霧化した融滴を急冷して凝固させることにより金属フレ
ークを製造する方法に関するものである。TECHNICAL FIELD The present invention relates to a method for producing flaky metal powder. In detail, the molten metal flowing out from the nozzle is atomized,
The present invention relates to a method for manufacturing metal flakes by rapidly cooling and solidifying atomized molten droplets.
従来技術
従来の急冷凝固金属フレークの製造方法には、例えば、
米国アルコア社のフレーク・プロセス（以下、噴霧ロー
ル法という。）がある。この噴霧ロール法は第１図に示
すように、ガス・アトマイズ装置と水冷回転ドラム（ロ
ール）とを使用し、ガス・アトマイズ装置で霧化された
金属融滴を回転している水冷ドラムに衝突させて急冷し
、凝固させてフレークに形成させる方法である。Prior Art Conventional methods for producing rapidly solidified metal flakes include, for example,
There is a flake process (hereinafter referred to as the spray roll method) manufactured by Alcoa Corporation in the United States. As shown in Figure 1, this spray roll method uses a gas atomizer and a water-cooled rotating drum (roll), and the metal droplets atomized by the gas atomizer collide with the rotating water-cooled drum. This is a method in which the material is allowed to cool rapidly, solidified, and formed into flakes.
このような噴霧ロール法によって急冷、凝固フレークを
製造するには、まず金属溶湯の均一な霧化を得ることが
重要である。このことに関して、ガス・アトマイズ装置
によって霧化を行なう場合、以下にあげるような問題点
がある。In order to produce rapidly cooled and solidified flakes by such a spray roll method, it is important to first obtain uniform atomization of the molten metal. In this regard, when atomization is performed using a gas atomization device, there are the following problems.
（１）、均一な霧化、すなわち均一な融滴を得るのが困
難である。(1) It is difficult to obtain uniform atomization, that is, uniform melt droplets.
（２）、アトマイズ媒にガスを用いるため、水冷ドラム
近傍でガスの乱れが発生し、これによって融滴のすべて
を水冷ドラムに衝突させることが困難となる。(2) Since gas is used as the atomizing medium, gas turbulence occurs near the water-cooled drum, making it difficult to cause all of the molten droplets to collide with the water-cooled drum.
（３）、ガスと融滴との熱伝達によって融滴の凝固が進
行して、融滴は水冷ドラムに衝突する前に、凝固を完了
しており、凝固粉末の全体中には、１０２〜１０４°Ｃ
，／ＳｅＣ程度の冷却速度で凝固した非フレーク状の粉
末が混在Ｊ−る。（急冷凝固フレークは１０４〜１０６
’Ｃ／ ｓｅｃの冷却速度で生成する。）Ｋｌガス・ア
トマイズ装置で溶湯の均一霧化を得るのが困難なため、
融滴の粒度を調整することが回動である。(3) The solidification of the molten droplets progresses due to heat transfer between the gas and the molten droplets, and the molten droplets complete solidification before colliding with the water-cooled drum. 104°C
, /SeC coexist with non-flake-like powder solidified at a cooling rate of about 100%. (Quickly solidified flakes are 104 to 106
'C/sec cooling rate. ) Because it is difficult to obtain uniform atomization of molten metal with Kl gas atomization equipment,
Rotation is used to adjust the particle size of the melt droplets.
目 的
本発明は、上記の問題点を解消して、均一でかつ酸化の
少ない、急冷凝固金属フレークを製造する方法を提供す
ることを目的とするものである。Purpose The present invention aims to solve the above-mentioned problems and provide a method for producing uniform, rapidly solidified metal flakes with little oxidation.
構成 本発明の要旨は、以下に記載するとおりのものである。composition The gist of the invention is as described below.
ノズルから流出する金属溶湯に超音波振動を与えて金属
融滴の噴流を生成させ、該金属融滴を凝固さぜることな
く、その噴流を水冷回転ロールに衝突さけて該融滴を急
冷し、凝固させて金属フレークに生成させることを特徴
とづ−る急冷凝固金属フレークの製造方法。Ultrasonic vibration is applied to the molten metal flowing out of the nozzle to generate a jet of molten metal droplets, and the molten droplets are rapidly cooled by colliding with a water-cooled rotating roll without solidifying the molten metal droplets. A method for producing rapidly solidified metal flakes, comprising: solidifying them to form metal flakes.
次に本発明を具体的に説明する。Next, the present invention will be specifically explained.
第２図は本発明の方法に使用する装置の１例とこの装置
の使用によって製造される急冷凝固フレークの生成過程
を説明するものである。１は金属溶湯の容器であって、
断熱材２からなる内筒と断熱材のホルダー３としての外
筒及び振動ノズル４を有する底部で構成されている。金
属溶湯５を収容した容器１は、振動板６上に置かれ、そ
の振動板６」−には、容器１の両側で超音波振動子７が
設（′、ｌられている。８は高周波電源、９は冷却水導
管、１０は水冷回転ロールである。FIG. 2 illustrates an example of an apparatus used in the method of the present invention and the process of producing rapidly solidified flakes produced by using this apparatus. 1 is a container for molten metal,
It is composed of an inner cylinder made of a heat insulating material 2, an outer cylinder as a holder 3 for the heat insulating material, and a bottom portion having a vibrating nozzle 4. A container 1 containing molten metal 5 is placed on a diaphragm 6, and ultrasonic transducers 7 are installed on both sides of the container 1 on the diaphragm 6. A power source, 9 a cooling water conduit, and 10 a water-cooled rotary roll.
高周波電源６により超音波振動子７を作動させて超音波
の振動を発生さゼる。この超音波振動は、振動板６を介
して振動ノズル４に 、加えられ、更に容器１から溶湯
５に伝わる。The ultrasonic vibrator 7 is activated by the high frequency power source 6 to generate ultrasonic vibrations. This ultrasonic vibration is applied to the vibrating nozzle 4 via the diaphragm 6, and is further transmitted from the container 1 to the molten metal 5.
超音波振動を受けた金属溶湯５は振動ノズル４の先端か
ら流出し、超音波振動により霧化されて金属融滴１１の
噴流となる。この融滴１１は、凝固することなく自由落
下して溶融状態のままで水冷回転ロール１０の表面に達
し、衝突して急冷され凝固して金属フレーク１２となる
。The molten metal 5 that has been subjected to ultrasonic vibrations flows out from the tip of the vibrating nozzle 4, is atomized by the ultrasonic vibrations, and becomes a jet of molten metal droplets 11. The molten droplets 11 fall freely without solidifying, reach the surface of the water-cooled rotary roll 10 in a molten state, collide, rapidly cool, and solidify to become metal flakes 12.
急冷凝固フレーク１２の大きさは、金属融滴の大きさを
制御することにより、任意の大きさにすることができる
。一方、金属融滴の大きさは、振動ノズル４の内径と超
音波振動子７の振動数、振幅を制御することにより、任
意に変えることができる。The size of the rapidly solidified flakes 12 can be set to any size by controlling the size of the molten metal droplets. On the other hand, the size of the metal molten droplet can be arbitrarily changed by controlling the inner diameter of the vibrating nozzle 4 and the frequency and amplitude of the ultrasonic vibrator 7.
効 果 本発明により以下のような効果が得られる。effect The present invention provides the following effects.
（１）、超音波により金属溶湯を噴霧することにＪ：っ
て、均一な金属の融滴が得られ、その結果均一な金属の
フレークを得ることができる。(1) By spraying molten metal using ultrasonic waves, uniform molten metal droplets can be obtained, and as a result, uniform metal flakes can be obtained.
］２）、超音波の振動数・１辰幅を変えることにより、
フレークの大きさを容易に調整するこ５−
とができる。]2) By changing the frequency and width of the ultrasonic wave,
The size of the flakes can be easily adjusted.
（３］０本発明の方法は真空中もしくは低圧の不活性ガ
ス中で行なうことができるため、フレークは表面酸化の
少ない、清浄なものどなる。更にアトマイズ媒のガスを
使用しないので、ガスによる伝熱がなく、これにより金
属融滴の凝固を遅ら仕ることができ、金属融滴のすべて
をフレークにすることができる。(3) Since the method of the present invention can be carried out in vacuum or in a low-pressure inert gas, the flakes are clean and have little surface oxidation.Furthermore, since no atomizing medium gas is used, gas transmission is possible. There is no heat, which slows down the solidification of the metal droplets and allows all of the metal droplets to become flakes.
（４）６本発明によって製造されるフレークは、水冷回
転ロール表面上で凝固するため、急冷凝固ｆｉｆｌ織（
微細粒組織）となる。(4)6 Since the flakes produced according to the present invention solidify on the surface of a water-cooled rotating roll, the flakes produced by the present invention have a rapidly solidified fifl texture (
fine grain structure).
第１図は従来の噴霧ロール法を説明する図、第２図は本
発明の方法に使用する装置の１例と急冷凝固フレークの
生成過程を概略的に示す図である。
１・・・金属溶湯容器、２・・・断熱）４．３・・・断
熱材ホルダー、４・・・振動ノズル、５・・・金属溶湯
、６・・・振動板、
−〇−
７・・・超音波振動子、８・・・高周波電源、９・・・
冷却水導管、１０・・・水冷回転ロール、１１・・・金
属融滴、１２・・・急冷凝固フレーク。
特許出願人
住友軽金属工業株式会社
代理人 弁理士 小松秀岳
代理人 弁理士 旭 宏
７−
第１図FIG. 1 is a diagram illustrating a conventional spray roll method, and FIG. 2 is a diagram schematically showing an example of an apparatus used in the method of the present invention and the production process of rapidly solidified flakes. 1... Molten metal container, 2... Heat insulation) 4.3... Heat insulation material holder, 4... Vibration nozzle, 5... Molten metal, 6... Vibration plate, -〇- 7. ...Ultrasonic vibrator, 8...High frequency power supply, 9...
Cooling water conduit, 10... Water-cooled rotary roll, 11... Metal molten droplets, 12... Rapidly solidified flakes. Patent applicant Sumitomo Light Metal Industries Co., Ltd. Representative Patent attorney Hidetake Komatsu Patent attorney Hiroshi Asahi 7- Figure 1
Claims (1)
融滴の噴流を生成させ、該金属融滴を凝固させることな
く、その噴流を水冷回転ロールに衝突させて該融滴を急
冷し、凝固させて金属フレークに形成させることを特徴
とする急冷凝固金属フレークの製造方法。Ultrasonic vibration is applied to the molten metal flowing out of the nozzle to generate a jet of molten metal droplets, and without solidifying the molten metal droplets, the jet collides with a water-cooled rotating roll to rapidly cool and solidify the molten metal droplets. 1. A method for producing rapidly solidified metal flakes, characterized by forming them into metal flakes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24551483A JPS60141808A (en) | 1983-12-28 | 1983-12-28 | Production of metallic flake solidified by quick cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24551483A JPS60141808A (en) | 1983-12-28 | 1983-12-28 | Production of metallic flake solidified by quick cooling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60141808A true JPS60141808A (en) | 1985-07-26 |
| JPH0325482B2 JPH0325482B2 (en) | 1991-04-08 |
Family
ID=17134807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24551483A Granted JPS60141808A (en) | 1983-12-28 | 1983-12-28 | Production of metallic flake solidified by quick cooling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60141808A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0943436A2 (en) * | 1998-03-19 | 1999-09-22 | Scitex Digital Printing, Inc. | Droplet generator and method of operating a droplet generator |
-
1983
- 1983-12-28 JP JP24551483A patent/JPS60141808A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0943436A2 (en) * | 1998-03-19 | 1999-09-22 | Scitex Digital Printing, Inc. | Droplet generator and method of operating a droplet generator |
| EP0943436A3 (en) * | 1998-03-19 | 2000-05-17 | Scitex Digital Printing, Inc. | Droplet generator and method of operating a droplet generator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0325482B2 (en) | 1991-04-08 |
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