JP6193538B2 - Nozzle, sieve - Google Patents
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- JP6193538B2 JP6193538B2 JP2011118092A JP2011118092A JP6193538B2 JP 6193538 B2 JP6193538 B2 JP 6193538B2 JP 2011118092 A JP2011118092 A JP 2011118092A JP 2011118092 A JP2011118092 A JP 2011118092A JP 6193538 B2 JP6193538 B2 JP 6193538B2
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本発明は、液体に触れ、かつ振動状態で使用されるノズル、篩に関する。 The present invention relates to a nozzle and a sieve that are used in contact with a liquid and in a vibrating state.
プレート本体の前面から後面へ延びる複数のテーパのついた孔を有する振動自在孔板（ノズル板）において、プレート本体がニッケルとパラジウムの合金から構成されることが開示されている（特許文献１参照）。 In a vibrating plate (nozzle plate) having a plurality of tapered holes extending from the front surface to the rear surface of the plate body, it is disclosed that the plate body is made of an alloy of nickel and palladium (see Patent Document 1). ).
しかしながら、液中に静的に浸漬した際には金属が該液中に溶出しない電鋳金属材であっても、液体に触れた状態で振動させると金属が溶出することがある。上記した従来例でいえば、例えばニッケル及びパラジウムの溶出が生じ得る。 However, even when an electroformed metal material in which the metal does not elute into the liquid when immersed in the liquid statically, the metal may be eluted when it is vibrated while in contact with the liquid. In the conventional example described above, elution of, for example, nickel and palladium can occur.
本発明は、上記事実を考慮して、液体に触れ、かつ振動状態で使用されるノズル、篩において、引張強さ等の機械的特性を確保しつつ、耐食性を向上させることを目的とする。 In consideration of the above facts, an object of the present invention is to improve corrosion resistance while ensuring mechanical properties such as tensile strength in a nozzle or sieve that is in contact with a liquid and used in a vibrating state.
請求項１に記載のノズルは、ニッケルのアモルファスからなる電鋳金属材で構成され、液体に触れ、かつ振動状態で使用されるので、引張強さが大きく、繰返し荷重に対する疲労強度が大きくなり、また液体に触れた状態で振動させた場合であっても、金属の溶出が抑制される。このため、引張強さ等の機械的特性を確保しつつ、耐食性を向上させることができる。また、液体噴出のための振動に伴う繰返し荷重に対する疲労強度を確保しつつ、該液体中への電鋳金属の溶出に対する耐食性を向上させることができる。 The nozzle according to claim 1 is composed of an electroformed metal material made of nickel amorphous , and is used in a vibrating state in contact with a liquid. Therefore, the tensile strength is large, and the fatigue strength against repeated load is increased. Moreover, even if it is a case where it vibrates in the state which touched the liquid, elution of a metal is suppressed. For this reason, corrosion resistance can be improved, ensuring mechanical characteristics, such as tensile strength. Further, the corrosion resistance against the elution of the electroformed metal into the liquid can be improved while ensuring the fatigue strength against the repeated load accompanying the vibration for the liquid jet.
請求項２に記載の篩は、ニッケルのアモルファスからなる電鋳金属材で構成され、液体に触れ、かつ振動状態で使用されるので、該電鋳金属材が、湿式で行われる微小粒子の選別・分級時に溶出することを防止できる。このため、選別・分級された微小粒子の純度を向上させることができる。
The sieve according to claim 2 is composed of an electroformed metal material made of nickel amorphous , and is used in a vibrating state while touching a liquid. -Elution during classification can be prevented. For this reason, the purity of the fine particles sorted and classified can be improved.
請求項１に記載のノズルによれば、引張強さ等の機械的特性を確保しつつ、耐食性を向上させることができる、という優れた効果が得られる。また、液体噴出のための振動に伴う繰返し荷重に対する疲労強度を確保しつつ、該液体中への電鋳金属の溶出に対する耐食性を向上させることができる、という優れた効果が得られる。 According to the nozzle of Claim 1 , the outstanding effect that corrosion resistance can be improved, ensuring mechanical characteristics, such as tensile strength , is acquired. Further, it is possible to obtain an excellent effect that the corrosion resistance against the elution of the electroformed metal into the liquid can be improved while ensuring the fatigue strength against the repeated load caused by the vibration for the liquid ejection.
請求項２に記載の篩によれば、湿式で選別・分級される微小粒子の純度を向上させることができる、という優れた効果が得られる。 According to the sieve of Claim 2 , the outstanding effect that the purity of the microparticles sorted and classified by the wet method can be improved is obtained.
以下、本発明を実施するための形態について説明する。図１に示される顕微鏡写真において、本実施形態に係る電鋳金属材は、結晶粒径が５００ｎｍ以下とされている。この範囲には、結晶粒径が０のもの、いわゆるアモルファスも含まれる。図２は、比較例に係り、結晶粒径が５００ｎｍを超えるものの顕微鏡写真である。 Hereinafter, modes for carrying out the present invention will be described. In the micrograph shown in FIG. 1, the electroformed metal material according to this embodiment has a crystal grain size of 500 nm or less. This range includes those having a crystal grain size of 0, so-called amorphous. FIG. 2 is a photomicrograph of the comparative example with a crystal grain size exceeding 500 nm.
電鋳金属材の具体例として、Ｎｉ−Ｐｄ、Ｎｉ−Ｐｄ−Ｃｏ、Ｎｉ−Ｐｄ−Ａｕ、Ｎｉ−Ａｕ、Ｃｏ−Ｐｄ、Ａｕ−Ｐｄ、Ａｕ−Ｃｏ、Ｎｉ−Ｗ−Ａｕの各電鋳合金、Ｎｉの電鋳金属が挙げられる。各電鋳合金における各金属の比率は任意である。Ｎｉの電鋳金属については、耐食性を向上させる観点から、アモルファスとすることが望ましい。 Specific examples of electroformed metal materials include Ni—Pd, Ni—Pd—Co, Ni—Pd—Au, Ni—Au, Co—Pd, Au—Pd, Au—Co, and Ni—W—Au. An alloy and Ni electroformed metal are mentioned. The ratio of each metal in each electroformed alloy is arbitrary. The Ni electroformed metal is preferably amorphous from the viewpoint of improving the corrosion resistance.
電鋳金属材の結晶粒径を５００ｎｍ以下とすることで、図３に示されるように、該電鋳金属材のビッカース硬さは、例えば５００〜７００となる。電鋳金属材がこのような硬さを有することで、耐磨耗性が得られる。なお、硬さ試験の試験荷重は０．９８Ｎ、保持時間は１５秒である。 By setting the crystal grain size of the electroformed metal material to 500 nm or less, as shown in FIG. 3, the Vickers hardness of the electroformed metal material is, for example, 500 to 700. Wear resistance is obtained because the electroformed metal material has such hardness. The test load of the hardness test is 0.98 N, and the holding time is 15 seconds.
電鋳金属材が、振動のような機械的なストレスを受けながら液体と接触する環境では、金属表面でラジカル反応が生じ易く、結果として腐食し易い環境となり、通常の耐食環境ではない。しかしながら、本実施形態に係る電鋳金属材では、結晶粒径を５００ｎｍ以下と小さく設定することにより、液体に触れた状態で振動させた場合であっても、結晶粒界での腐食が発生せず、金属の溶出が抑制される。液体が、例えばアスコルビン酸のような金属を冒す還元剤を含むものや、次亜リン酸ソーダ溶液のような酸化性溶液等、ＰＨ１〜ＰＨ９までの酸・アルカリ水溶液であっても、耐食性を維持することができる。一例として、図４に、振動状態の電鋳金属材に塩水を噴霧した場合の、結晶粒径と腐食速度との関係を示す。図４から、結晶粒径が５００ｎｍ以下では、腐食速度が小さくなることがわかる。 In an environment in which an electroformed metal material is in contact with a liquid while receiving mechanical stress such as vibration, a radical reaction is likely to occur on the metal surface, resulting in an environment that is easily corroded, and is not a normal corrosion resistant environment. However, in the electroformed metal material according to the present embodiment, by setting the crystal grain size as small as 500 nm or less, even when the liquid crystal is vibrated in contact with the liquid, corrosion at the crystal grain boundary occurs. Therefore, metal elution is suppressed. Maintains corrosion resistance even if the liquid is an acid / alkali aqueous solution of PH1 to PH9, such as those containing a reducing agent that affects metals such as ascorbic acid or oxidizing solutions such as sodium hypophosphite solution can do. As an example, FIG. 4 shows the relationship between the crystal grain size and the corrosion rate when salt water is sprayed on an electroformed metal material in a vibrating state. FIG. 4 shows that the corrosion rate decreases when the crystal grain size is 500 nm or less.
また、結晶粒径を上記のように設定することで、引張強さが大きく、繰返し荷重に対する疲労強度が大きくなる。一例として、株式会社島津製作所製の電磁力式微小試験機 ＭＭＴ−１０１ＮＭ−１０を使用した、結晶粒径と引張強さとの関係（図５）、及び結晶粒径と疲労強度との関係（図６）を測定した。結晶粒径が５００ｎｍ以下で、引張強さ及び疲労強度が大きくなることがわかる。 Moreover, by setting the crystal grain size as described above, the tensile strength is large, and the fatigue strength against repeated loads is large. As an example, the relationship between the crystal grain size and the tensile strength (FIG. 5) and the relationship between the crystal grain size and the fatigue strength (Fig. 5) using the electromagnetic force micro tester MMT-101NM-10 manufactured by Shimadzu Corporation. 6) was measured. It can be seen that the tensile strength and fatigue strength increase when the crystal grain size is 500 nm or less.
このように、本実施形態に係る電鋳金属材では、引張強さ等の機械的特性を確保しつつ、耐食性を向上させることができる。 Thus, in the electroformed metal material according to the present embodiment, the corrosion resistance can be improved while securing mechanical properties such as tensile strength.
本実施形態に係る電鋳金属材により、ノズルを構成することができる。このノズルは、電鋳により形成され、微細な孔が形成された、例えばノズル板である。このノズルによれば、液体噴出のための振動に伴う繰返し荷重に対する疲労強度を確保しつつ、該液体中への電鋳金属の溶出に対する耐食性を向上させることができる。 A nozzle can be comprised with the electroformed metal material which concerns on this embodiment. This nozzle is formed by electroforming, for example, a nozzle plate in which fine holes are formed. According to this nozzle, the corrosion resistance against the elution of the electroformed metal into the liquid can be improved while ensuring the fatigue strength against the repeated load accompanying the vibration for the liquid ejection.
このノズルは、液体吐出ヘッド、噴霧器、燃料噴射用のインジェクタ、フィルタ等に適用することができる。液体吐出ヘッドでは、疲労強度や弾性といった機械的特性に優れた電鋳金属材で構成されたノズルを用いることで、液体吐出性能が高く、長寿命となる。 This nozzle can be applied to a liquid discharge head, a sprayer, an injector for fuel injection, a filter, and the like. In the liquid discharge head, by using a nozzle made of an electroformed metal material having excellent mechanical properties such as fatigue strength and elasticity, the liquid discharge performance is high and the life is long.
噴霧器は、例えば薬剤を経鼻・経口吸引するための吸入器（ネブライザ）に応用することができる。疲労強度や弾性といった機械的特性、及び耐食性に優れた電鋳金属材で構成されたノズルを用いることで、噴霧性能が高く、長寿命となり、かつ噴霧された液体中へのノズルの金属の溶出を防止することができる。 The nebulizer can be applied to, for example, an inhaler (nebulizer) for nasally or orally aspirating a drug. By using a nozzle made of electroformed metal material with excellent mechanical properties such as fatigue strength and elasticity, and corrosion resistance, the spray performance is high, the service life is long, and the metal of the nozzle is eluted into the sprayed liquid. Can be prevented.
更に、本実施形態に係る電鋳金属材により、ステントを構成することができる。ステントは、人体における管状部分を広げた状態に保持するための網目の筒状体である。このステントを例えば血管に用いた場合、該ステントは、血液中において脈動による繰返し荷重を受ける。しかしながら、このステントは、疲労強度や弾性といった機械的特性、及び耐食性に優れた電鋳金属材で構成されているので、長期に渡って使用でき、かつ血液等人体中への金属の溶出を防止することができる。 Furthermore, a stent can be comprised with the electroformed metal material which concerns on this embodiment. A stent is a cylindrical body of a mesh for holding a tubular portion of a human body in an expanded state. When this stent is used for a blood vessel, for example, the stent is repeatedly subjected to pulsation in blood. However, this stent is made of electroformed metal material with excellent mechanical properties such as fatigue strength and elasticity, and corrosion resistance, so it can be used for a long time and prevents elution of metals such as blood into the human body. can do.
また本実施形態に係る電鋳金属材により、篩を構成することができる。この篩は、例えば電池の材料として用いられる炭素の粉末中から、金属等の不純物を取り除く場合や、トナーの分級等に広く用いられている。この篩による微小粒子の選別や分級は、酸やアルカリ等の液中で行われる場合がある（湿式）。しかしながら、本実施形態に係る篩によれば、該篩を構成する金属が、耐食性に優れた電鋳金属材で構成されているので、湿式で行われる微小粒子の選別や分級時に金属が溶出することを防止できる。このため、選別・分級された微小粒子の純度を向上させることができる。 Moreover, a sieve can be comprised with the electroformed metal material which concerns on this embodiment. This sieve is widely used, for example, for removing impurities such as metals from a carbon powder used as a battery material or for classifying toner. The selection and classification of fine particles by this sieve may be performed in a liquid such as acid or alkali (wet). However, according to the sieve according to the present embodiment, since the metal constituting the sieve is composed of an electroformed metal material having excellent corrosion resistance, the metal is eluted during the selection and classification of fine particles performed in a wet manner. Can be prevented. For this reason, the purity of the fine particles sorted and classified can be improved.
本実施形態に係る電鋳金属材は、この他、液体に触れ、かつ振動状態で使用される種々の用途に適用することができる。振動下において、腐食が生じない電鋳金属材は、また硬度が高いので、例えば研磨剤の紛粒を篩う場合でも耐磨耗性を発揮し、安定して幅広い工業生産に利用できる材料として、極めて有用である。 In addition to this, the electroformed metal material according to the present embodiment can be applied to various applications that are in contact with a liquid and used in a vibrating state. An electroformed metal material that does not corrode under vibration is also very hard, so it exhibits wear resistance even when sieving abrasive particles, for example, as a material that can be used stably for a wide range of industrial production. Is extremely useful.
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| JP2011118092A JP6193538B2 (en) | 2011-05-26 | 2011-05-26 | Nozzle, sieve |
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| JP6193538B2 true JP6193538B2 (en) | 2017-09-06 |
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| JPS55155769A (en) * | 1979-05-24 | 1980-12-04 | Dainippon Printing Co Ltd | Preparation of metallic filter |
| JPS5869064A (en) * | 1981-10-22 | 1983-04-25 | Ricoh Co Ltd | Manufacture of nozzle for ink jet printer |
| JPWO2006135057A1 (en) * | 2005-06-17 | 2009-01-08 | 株式会社ルス・コム | Ni electroformed ultrafine tube, Ni electroformed ultrafine ring, and uses thereof |
| US9119906B2 (en) * | 2008-09-24 | 2015-09-01 | Integran Technologies, Inc. | In-vivo biodegradable medical implant |
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