JP2007237137A - Hairline-patterned coated steel plate and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily provide a hairline-patterned coated steel plate with conventional coating equipment. <P>SOLUTION: Many point materials are pressed against a coated steel plate to give many linear stripes, and then the plate is dried and plated to form a hairline-patterned coated steel plate. In its manufacturing, many point materials are pressed against a plate, which is coated with coating having the lowest viscosity of 14 mPa s (a B-type rotational viscometer/6 rpm), to give many linear stripes, and then the plate is dried and plated at 180-230°C, which the temperature of the plate reaches, for 20-60 seconds while the coating is wet. A material on which many needles or nails are fixedly arranged along the linear stripes of hairlines can be mounted on the point material, or a frog-like material can also be used. A material, in which a disk-shaped rotatable cutter such as a cross hatching cutter whose pitches are preliminarily determined is arranged to fit the width direction of the steel plate, can be use. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、家電製品、レンジフード等の器物に使用されるヘアライン調の意匠鋼板に関する。   The present invention relates to a hairline-like design steel plate used for appliances such as home appliances and range hoods.

従来、ヘアライン調の意匠付与は、塗膜の上に印刷で意匠を付与したクリア塗膜を設けて印刷模様を保護する方法（特許文献１）やクリアフィルムにヘアライン研磨した表面に金属蒸着膜を施した化粧シートを接着剤で鋼板にラミネートする方法（特許文献２）などがある。
特開平１１−２０７８６１号公報 特開２００５−２８０１７２号公報 Conventionally, hairline-like design is applied by a method of protecting a printed pattern by providing a clear coating with a design applied on the coating (Patent Document 1) or by applying a metal vapor-deposited film on the surface of the clear film subjected to hairline polishing. There is a method of laminating the applied decorative sheet on a steel plate with an adhesive (Patent Document 2).
Japanese Patent Laid-Open No. 11-207861 JP 2005-280172 A

特許文献１にあるような印刷は簡便であるが、ヘアライン模様の各線条筋が太く意匠性に乏しい。また、保護膜を必要とするため、多数の塗装工程を経ることからコスト高となる。また、特許文献２にある化粧シートは意匠性に富んでいるが、フィルムにヘアラインを研磨で付与した後、金属蒸着膜を形成するが、フィルムと蒸着膜の密着力が小さく、鋼板にラミネートする際に擦れて金属蒸着膜が剥離するおそれがある。したがって生産にあたっては細心な注意を要し、作業性が悪い。   Printing as in Patent Document 1 is simple, but each streak of the hairline pattern is thick and has poor design. In addition, since a protective film is required, the cost increases due to a large number of painting steps. Moreover, although the decorative sheet in Patent Document 2 is rich in design, after a hairline is applied to the film by polishing, a metal vapor deposition film is formed, but the adhesion between the film and the vapor deposition film is small, and the film is laminated to a steel plate. There is a possibility that the metal vapor deposition film may be peeled off. Therefore, careful attention is required for production, and workability is poor.

本発明は、これらの問題点を解消するため、安価で作業性のよい鮮明なヘアライン模様を発現させる方法を種々検討した。   In order to solve these problems, the present invention has studied various methods for expressing a clear hairline pattern that is inexpensive and has good workability.

上記した課題を解決するため本発明において講じた技術的手段は、塗料を塗布した鋼板に、多数の尖頭材を押し付けて多数の線条筋を付した後、乾燥焼付けてなるヘアライン調塗装鋼板とした。製造に際しては、粘度の下限が１４ｍＰa・s（Ｂ型回転粘度計／6ｒｐｍ）の塗料を塗布した鋼板に、多数の尖頭材を押し付けて多数の線条筋を付した後、塗料がウエット状態にあるうちに到達板温１８０〜２３０℃の温度で２０〜６０秒間乾燥焼付けることにした。尖頭材には多数の釘をヘアラインの線条筋に沿うように固定配列したものを取り付けてもよいし、剣山状のものを用いてもよい。また、クロスハッチカッターのように予めピッチが決められた回動自在な円盤状のカッターを鋼板の幅方向に合致するように配置したものを用いてもよい。   The technical means taken in the present invention in order to solve the above-described problem is that a steel plate coated with a paint is applied with a number of pointed materials to apply a number of striated bars, and then dried and baked. It was. At the time of manufacture, after applying a number of pointed materials to a steel sheet coated with a paint having a lower viscosity limit of 14 mPa · s (B-type rotational viscometer / 6rpm), the paint is in a wet state. In the meantime, it was decided to carry out drying baking for 20 to 60 seconds at the ultimate plate temperature of 180 to 230 ° C. The pointed material may be attached with a large number of nails fixedly arranged along the streak of the hairline, or a sword-shaped one may be used. Moreover, you may use what arrange | positioned the disk-shaped cutter with which the pitch was decided beforehand like the cross hatch cutter so that it might correspond to the width direction of a steel plate.

塗料を塗布した後、ウエット状態にあるうちに多数の線条を付与して加熱乾燥するだけであり、現行の連続塗装設備や切板塗装でも多額の設備投資の必要もなく、安価で作業性のよいヘアライン調の意匠塗装鋼板が得られる。   After applying the paint, it is only necessary to apply a large number of filaments while it is in the wet state and dry it by heating. A design-coated steel sheet with a good hairline tone is obtained.

本発明のヘアライン調塗装鋼板は、鋼板表面に塗布した塗料がウエット状態にあるうちに、例えば図１のヘアライン調意匠付与の模式図に示すような尖頭材として多数の釘や針を垂直に軽く押し当てて数条の筋を付けた後、塗料がレベリングにより平滑になる前に加熱乾燥することにより形成される。この際に付与された筋状模様の意匠がヘアライン調になるものである。   The hairline-like coated steel sheet of the present invention has a large number of nails and needles vertically as a pointed material as shown in the schematic diagram of hairline design application in FIG. 1, for example, while the paint applied to the surface of the steel sheet is in a wet state. It is formed by heat-drying after applying a few stripes by lightly pressing and before the paint becomes smooth by leveling. The design of the streak pattern given at this time becomes a hairline tone.

基材である鋼板は、亜鉛系めっき鋼板、アルミニウム系めっき鋼板、亜鉛−アルミニウム合金めっき鋼板、亜鉛−アルミニウム−マグネシウム合金めっき鋼板、ステンレス鋼板を用いることが好ましい。鋼板には、必要に応じアルカリ脱脂，表面調整，化成処理等の塗装前処理が施される。アルカリ脱脂，表面調整には、プレコート鋼板や塗装アルミニウム板の製造で常用されている方法を採用できる。化成処理には、クロメート処理，リン酸塩処理，クロムフリー処理等がある。   It is preferable to use a zinc-based plated steel sheet, an aluminum-based plated steel sheet, a zinc-aluminum alloy-plated steel sheet, a zinc-aluminum-magnesium alloy-plated steel sheet, or a stainless steel sheet as the steel sheet as the base material. The steel sheet is subjected to pre-coating treatments such as alkali degreasing, surface adjustment, and chemical conversion treatment as necessary. For alkali degreasing and surface adjustment, methods commonly used in the production of precoated steel sheets and painted aluminum sheets can be employed. The chemical conversion treatment includes chromate treatment, phosphate treatment, chromium-free treatment and the like.

塗料は、とくに限定されることはなく、アクリル樹脂系、ポリエステル樹脂系、高分子ポリエステル樹脂系、エポキシ変性高分子ポリエステル系、エポキシ樹脂系、ウレタン樹脂系、フッ素樹脂系などの通常のものを用いることができる。アルミニウム粉末などの金属粉末を添加したメタリック顔料を配合してもよく、メタリック顔料を配合することにより、ヘアライン調が鮮明となり意匠性が向上する。   The paint is not particularly limited, and an ordinary paint such as an acrylic resin, polyester resin, polymer polyester resin, epoxy-modified polymer polyester, epoxy resin, urethane resin, or fluororesin is used. be able to. A metallic pigment to which metal powder such as aluminum powder is added may be blended, and by blending the metallic pigment, the hairline tone becomes clear and the design is improved.

調製された塗料は、粘度の下限が１４ｍＰa・s（Ｂ型回転粘度計／6ｒｐｍ：東機産業製ＢＭ型粘度計）となるように調整する。粘度が１４ｍＰa・s未満では、塗布した塗料がさらさらの状態になり、尖頭材で線条の筋を付与しても直ぐに流れ出し、ヘアライン調が発現できない。また、９Ｐa・s以上になると、ゲル状態となり塗料として機能しなくなる。
なお、ヘアライン調の意匠を付与するには、乾燥膜厚として１０〜５０μｍ、好ましくは１５〜３０μｍが意匠性も優れ経済的である。 The prepared paint is adjusted so that the lower limit of the viscosity is 14 mPa · s (B-type rotational viscometer / 6 rpm: BM viscometer manufactured by Toki Sangyo). When the viscosity is less than 14 mPa · s, the applied paint is in a free-flowing state, and even if a streak is applied with a streak, it immediately flows out and a hairline tone cannot be expressed. Moreover, when it becomes 9 Pa · s or more, it becomes a gel state and does not function as a paint.
In addition, in order to give the design of a hairline tone, 10-50 micrometers as a dry film thickness, Preferably 15-30 micrometers is also excellent in design property and economical.

塗料を鋼板に塗布した後、ウエット状態にあるうちに、多数の尖頭材を押し付けて多数の線条筋を付与する。線条筋の付与手段としては、図２に示す多数の針をヘアラインの線条筋に沿うように固定配列したものを取り付けてもよいし、剣山状のものを用いてもよい。また、図３に示すようなクロスハッチカッターのように予めピッチが決められた回動自在な円盤状のカッターを鋼板の幅方向に合致するように配置したものなどがある。   After applying the paint to the steel sheet, while in the wet state, a large number of pointed materials are pressed to provide a large number of filaments. As the means for applying the streak, a plurality of needles shown in FIG. 2 which are fixedly arranged along the streak of the hairline may be attached, or a sword-shaped one may be used. Further, there is a cross-hatch cutter as shown in FIG. 3 in which a rotatable disk-shaped cutter having a predetermined pitch is arranged so as to match the width direction of the steel sheet.

前記のとおり多数の線条筋を付した後、塗料がウエット状態にあるうちに到達板温１８０〜２３０℃の温度範囲で２０〜６０秒間乾燥焼付ける。
温度が１８０℃未満で乾燥時間が２０秒未満では、乾燥が十分でなく、コイルで巻き取る際に塗料がベタ付く。温度が２３０℃を越えて乾燥時間が６０秒を越えると、塗料が突沸してワキや塗膜が黄変するなどの塗膜欠陥が発生しやすくなる。 After applying a large number of streaks as described above, the paint is dried and baked for 20 to 60 seconds in a temperature range of 180 to 230 ° C. while the paint is in a wet state.
If the temperature is less than 180 ° C. and the drying time is less than 20 seconds, the drying is not sufficient, and the paint becomes sticky when wound with a coil. When the temperature exceeds 230 ° C. and the drying time exceeds 60 seconds, coating defects such as bumping of the coating and yellowing of the coating or coating tend to occur.

実施例１；
厚さ０．５ｍｍ、片面当たりめっき付着量４５ｇ／ｍ^２の溶融亜鉛めっき鋼板に、Ｔｉ系クロムフリー処理を施し、鱗片状アルミニウム粉末顔料を配合したエポキシ変性ポリエステル樹脂塗料を乾燥膜厚で５μｍ塗布し、熱風加熱式オーブンで到達板温１９０℃×２５秒間焼付け、水冷後、鱗片状アルミニウム粉末及び着色顔料を配合し、塗料粘度を２０ｍＰａ・ｓに調整したポリエステル樹脂塗料を乾燥膜厚が１８μｍになるように塗布し、塗料がウエット状態にあるうちに、線条筋の間隔が１ｍｍとなるように針を固定した図２に示す治具を用いて多数の線条筋を付与し、直ちに２１０℃×４０秒間加熱・乾燥を経てヘアライン調塗装鋼板を作製した。通常のヘアライン仕上げと遜色のない塗装外観が得られ、塗膜性能もヘアラインなしのものと変化がなかった。 Example 1;
Thickness 0.5 mm, the galvanized steel sheet per side coating weight 45 g / m ^2, subjected to a Ti-based chromium-free treatment, 5 [mu] m coated with epoxy-modified polyester resin coating blended with scaly aluminum powder pigment at a dry film thickness Then, after baking at a plate temperature of 190 ° C. for 25 seconds in a hot-air heating oven, cooling with water, blending a scaly aluminum powder and a color pigment, and adjusting the paint viscosity to 20 mPa · s, the polyester resin paint has a dry film thickness of 18 μm. While the paint is in a wet state, a large number of streaks are applied using the jig shown in FIG. 2 in which the needles are fixed so that the distance between the streaks is 1 mm. A hairline-like coated steel sheet was produced after heating and drying at ℃ × 40 seconds. A normal hairline finish and a paint appearance comparable to that of a normal hairline finish were obtained, and the coating film performance was the same as that without the hairline.

実施例２；
線条筋を付与する治具が図３に示すクロスハッチカッター状のものを用いた以外は実施例１と同様な条件でヘアライン調塗装鋼板を作製した。通常のヘアライン仕上げと遜色のない塗装外観が得られ、塗膜性能もヘアラインなしのものと変化がなかった。 Example 2;
A hairline-tone coated steel sheet was produced under the same conditions as in Example 1 except that the jig for applying the filament streak was a cross hatch cutter-like one shown in FIG. A normal hairline finish and a paint appearance comparable to that of a normal hairline finish were obtained, and the coating film performance was the same as that without the hairline.

以上に説明したとおり、本発明のヘアライン調塗装鋼板は、特別な設備は不要で簡単な治具で作業性もよくプレコート鋼板や切板塗装鋼板として作製できる。作製された塗装鋼板は研磨によるヘアラインと遜色なく優れた意匠性を発現する。   As described above, the hairline-tone coated steel sheet of the present invention can be produced as a pre-coated steel sheet or a cut-coated steel sheet with no need for special equipment and good workability with a simple jig. The produced coated steel sheet exhibits an excellent design without being inferior to a hairline by polishing.

発明のヘアライン調意匠付与する状態を示す模式図。The schematic diagram which shows the state which gives the hairline design of invention. 本発明のヘアライン調意匠付与の治具の一例と付与状態を示す斜視図。The perspective view which shows an example of the jig | tool of the hairline design design provision of this invention, and the provision state. 本発明のヘアライン調意匠付与の治具の別の一例を示す斜視図。The perspective view which shows another example of the jig | tool of hairline design design provision of this invention.

Claims (2)

塗料を塗布した鋼板に、多数の尖頭材を押し付けて多数の線条筋を付した後、乾燥焼付けてなるヘアライン調塗装鋼板。   A hairline-like coated steel sheet that is dry-baked after a large number of pointed materials are pressed against the steel sheet to which the paint has been applied. 粘度の下限が１４ｍＰa・s（Ｂ型回転粘度計／6ｒｐｍ）の塗料を塗布した鋼板に、多数の尖頭材を押し付けて多数の線条筋を付した後、塗料がウエット状態にあるうちに到達板温１８０〜２３０℃の温度で２０〜６０秒間乾燥焼付けることを特徴とするヘアライン調塗装鋼板の製造方法。


























A steel plate coated with a paint with a viscosity lower limit of 14 mPa · s (B-type rotational viscometer / 6rpm) is pressed with a large number of pointed materials to a large number of streaks, and then the paint is in a wet state. A method for producing a hairline-coated steel sheet, characterized by drying and baking at a final plate temperature of 180 to 230 ° C. for 20 to 60 seconds.

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