JPS6344962A - Preparation of painted steel plate - Google Patents
Preparation of painted steel plateInfo
- Publication number
- JPS6344962A JPS6344962A JP18789186A JP18789186A JPS6344962A JP S6344962 A JPS6344962 A JP S6344962A JP 18789186 A JP18789186 A JP 18789186A JP 18789186 A JP18789186 A JP 18789186A JP S6344962 A JPS6344962 A JP S6344962A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- paint
- coating
- treatment
- powder
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 42
- 239000010959 steel Substances 0.000 title claims abstract description 42
- 239000000843 powder Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 230000006698 induction Effects 0.000 claims abstract description 13
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 6
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims description 54
- 239000011248 coating agent Substances 0.000 claims description 47
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000008397 galvanized steel Substances 0.000 claims description 6
- 239000010960 cold rolled steel Substances 0.000 claims description 5
- 238000009503 electrostatic coating Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000012948 isocyanate Substances 0.000 claims description 2
- 150000002513 isocyanates Chemical class 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 abstract description 31
- 239000002904 solvent Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 238000010422 painting Methods 0.000 abstract description 3
- 238000004381 surface treatment Methods 0.000 abstract description 3
- 238000010433 powder painting Methods 0.000 abstract 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract 1
- 235000019589 hardness Nutrition 0.000 abstract 1
- 239000011701 zinc Substances 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 238000012545 processing Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000007602 hot air drying Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 206010048245 Yellow skin Diseases 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004439 roughness measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は塗装鋼板の製造方法に関し、とくに詳しくは
冷蔵庫や洗澗機なとの家電製品のホゾイー、その他衣装
ケース、ポットなとの家業製品用としてとくに外観が重
要視される屋内用品のための塗装鋼板で、加工前又は後
に塗装焼付か行なわれている塗装鋼板の製造方法に関す
るものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing coated steel sheets, and in particular, it relates to a method for manufacturing coated steel sheets, and more particularly to home appliances such as refrigerators, washing machines, and other household products such as clothing cases and pots. The present invention relates to a method for manufacturing painted steel sheets for indoor products where appearance is particularly important for use, and in which painting is baked before or after processing.
〔従来の技術）
従来、上記のような家電又は家業製品に用いられる塗装
鋼板においては、下記のようなボストコ−）−１鋼板の
連続プレコート及び切板プレコートの三種の塗装作業か
行なわれている。すなわち、（１） ポストコートて
は、亜鉛めっき鋼板に表面処理を施した鋼板に対して、
所定の形状に、切断、成型加工、溶接１組立てを行ない
、溶剤型塗料のスプレー塗装、または粉体塗料の静電粉
体塗装を行なったのち、熱風乾燥炉を用いて焼付け（２
０〜３０分）を行なう。[Prior art] Conventionally, for painted steel sheets used for home appliances or household products such as those mentioned above, three types of painting operations have been carried out: continuous pre-coating of steel sheets and cut plate pre-coating as described below. . In other words, (1) Post coating is applied to galvanized steel sheets with surface treatment.
After cutting, molding, welding and assembling into a predetermined shape, spray painting with solvent-based paint or electrostatic powder coating with powder paint, baking using a hot air drying oven (2
0 to 30 minutes).
（２） 連続プレコートでは、亜鉛メツキ鋼板に表面
処理を施した鋼板で、溶剤型塗料を用いて作製したコイ
ル状のカラー鋼板（通常２コート、２べ一りて下塗り５
μｍ、上塗り２０μｍ）を作製し、このカラー鋼板の切
断、成型加工を行ない、溶接の代わりにボルト締め、か
しめ、接着等により組立てを行なう。(2) Continuous pre-coating is a galvanized steel plate with a surface treatment, and a coil-shaped colored steel plate made using solvent-based paint (usually 2 coats, 2 coats and 5 coats of undercoat).
The color steel plate is cut and molded, and assembled by bolting, caulking, gluing, etc. instead of welding.
（３） 切板プレコートては、原板として、亜鉛めっ
き鋼板または冷延鋼板に表面処理を施したものを用い、
切仮に軽加工（穴あけ、折りまげなど）を施し、静電粉
体塗装により、粉体塗料を吹付けて塗装を行ない、焼付
方法として熱風乾燥炉または赤外加熱炉を用いて２〜５
分の時間で焼付けを行ない、粉体塗膜３５μの塗膜また
は、エポキシ系溶剤型ブライマー５μｍ生粉体塗膜３５
μｍを形成させる。そののち、成型加工を行ないポルト
締め、かしめ、接着などにより組立てを行なう。(3) For pre-coated cut plates, a surface-treated galvanized steel plate or cold-rolled steel plate is used as the original plate,
Lightly process the cut paper (drilling, folding, etc.), apply electrostatic powder coating, spray powder coating, and bake using a hot air drying oven or infrared heating oven for 2 to 5 seconds.
Baking is done in a time of 35 minutes, and a 35 μm powder coating or a 5 μm raw powder coating using epoxy solvent-based brimer is applied.
form μm. After that, the parts are molded and assembled by bolt tightening, caulking, gluing, etc.
上記のような従来の塗装鋼板の製造方法においては、（
１）ボストコート、（２）連続プレコート及び（３）切
板プレコートに対して、下記のような問題点かあった。In the conventional method of manufacturing coated steel sheets as described above, (
1) Bost coat, (2) continuous precoat, and (3) cut plate precoat had the following problems.
すなわち、
（１“） ボストコート
成型された形状に合わせて塗装を行なう必要かあり、塗
装効率が悪い。また、塗料の焼付けに比較的大型の炉を
必要とし、このため高速かつ連続的な処理か難しい。In other words, (1") Bost Coat It is necessary to apply the coating to match the molded shape, resulting in poor coating efficiency. Also, a relatively large furnace is required to bake the paint, which requires high-speed and continuous processing. difficult.
（２“） 連続プレコート
溶剤型塗料に対し、熱風乾燥炉を用いて塗装コイルを作
成するため、塗膜表面にゴミかイ」着しやすい。このた
め良好な塗膜表面か要求される家電、家業製品の分野で
は不都合である。また溶剤型塗料を用いたカラー鋼板で
は塗料膜の成型加工性を増大させると塗膜の表面硬度か
不足し、耐ンη染性か低下してしまう。（例えば、リニ
アポリエステル塗料）逆に表面硬度を十分に与えると、
加工性か低下してしまう。（例えはアクリル塗料）（３
′） 切板プレコート
切仮に対して、塗装、焼付けを行なうため、コイルコー
ティングに比へて効率かよくない。さらに、粉体塗料は
硬化時間か２〜５分と長く生産性が低い。(2") For continuous pre-coat solvent-based paints, a hot air drying oven is used to create a coating coil, which tends to cause dirt and debris to accumulate on the paint film surface. For this reason, it is inconvenient in the fields of home appliances and household products that require a good coating surface. In addition, in the case of color steel plates using solvent-based paints, if the moldability of the paint film is increased, the surface hardness of the paint film becomes insufficient and the stain resistance decreases. (For example, linear polyester paint) Conversely, if you give sufficient surface hardness,
Processability will decrease. (For example, acrylic paint) (3
’) Since the pre-coated cutting board is painted and baked, it is less efficient than coil coating. Furthermore, powder coatings have a long curing time of 2 to 5 minutes and are low in productivity.
この発明は上記のような問題点を解決するためになされ
たもので、塗膜表面にゴミなどのイ」着の２ｔい良質の
塗膜表面を得るとともに、塗膜自体の耐汚染性か良好で
、かつ加工性がすくれ、しかも硬化処理時間の短かい塗
装鋼板の製造方法を提供するものである。This invention was made to solve the above-mentioned problems, and it not only provides a high-quality coating surface that is free from dust and other particles, but also improves the stain resistance of the coating itself. To provide a method for manufacturing a coated steel sheet that has easy workability and short hardening treatment time.
〔問題点を解決するための手段］
この発明に係る塗装鋼板の製造方法は、亜鉛めっき鋼板
にクロメート処理による表面処理を施した鋼板の表面に
、粉体塗料の静電粉体塗装を行なったのち、誘導加熱炉
を用いて塗料の連続焼付けを３０秒間行って硬化を行う
ものて、さらに用途に応して、第２の発明に示したみが
き鋼板などによる調質圧延すなわち軽圧下処理を行うも
のである。なお、誘導加熱による塗膜の短時間硬化に対
しては、短時間硬化に適する粉体塗料を用いている。[Means for Solving the Problems] The method for manufacturing a coated steel sheet according to the present invention involves performing electrostatic powder coating with a powder coating on the surface of a steel sheet that has been surface-treated by chromate treatment on a galvanized steel sheet. Afterwards, the paint is continuously baked for 30 seconds using an induction heating furnace to harden it, and then, depending on the application, it is subjected to temper rolling, that is, light reduction treatment, using a polished steel plate or the like as shown in the second invention. It is something. In addition, for short-time curing of the coating film by induction heating, a powder coating suitable for short-time curing is used.
〔作用）
この発明においては、まず塗膜の材料に粉体塗料を用い
て鋼板にコイルコーティングするのて、第１表から明ら
かなように溶剤型の塗料に比して、加工性と表面硬度の
両面に対してバランスのとれた塗膜が形成される。また
、塗料にシンナーなとの溶剤を含まないため公害防止対
策上有利である。さらにボストコ−１・では非効軍的で
あったコーティング作業に対して、鋼板への連続的かつ
効率的なコーディングを可能とした。[Function] In this invention, first, a powder coating material is used as the coating material to coat a steel plate in coils, and as is clear from Table 1, it has better workability and surface hardness than solvent-based coatings. A well-balanced coating film is formed on both sides. Furthermore, since the paint does not contain solvents such as thinners, it is advantageous in terms of pollution prevention measures. Furthermore, unlike the ineffective coating process of the Bostco-1, it has now become possible to coat steel plates continuously and efficiently.
次に、誘導加熱による塗膜の焼付番づか行なわれるか、
これは塗膜を累月である鋼板からの加熱で硬化させる方
法であるため、短時間の硬化か可能となる。とくに塗料
の組成を変えた短時間処理に適した粉体塗料を用いるの
て、従来の２〜５分の処理時間を３０秒に短縮できる。Next, the coating film is baked and numbered by induction heating.
Since this is a method of curing the coating film by heating from a steel plate over a period of time, it can be cured in a short period of time. In particular, by using a powder coating with a different paint composition that is suitable for short-time processing, the conventional processing time of 2 to 5 minutes can be shortened to 30 seconds.
また、塗膜形成後に行う軽圧下処理（調質圧延ともいう
）は、粉体塗装に特有な゛ユズ肌パ仕−」二げを防止す
るためのもので、この処理で任意の平滑面にせしめて、
塗膜の特性を失うことなく表面の鮮映性および平滑面を
向上せしめるものである。In addition, the light rolling treatment (also called temper rolling) performed after the coating film is formed is to prevent the "yellow skin finish" that is characteristic of powder coating, and this treatment can be applied to any smooth surface. Please,
It improves the sharpness and smoothness of the surface without losing the properties of the coating film.
〔発明の実施例）
第１図は木発明の一実施例を示す誘導加熱による粉体塗
料の焼付ｉ−１による塗装鋼板の製造工程を示すフロー
図である。鋼板には電気亜鉛めっき鋼板、ミニマムスバ
ングル仕上げの溶融亜鉛めっき鋼板及び冷延鋼板の３種
についてそれぞれ第１図の流れに従って処理を行い塗装
鋼板を作製した。[Embodiment of the Invention] FIG. 1 is a flowchart showing a manufacturing process of a coated steel plate by baking a powder coating material by induction heating i-1, showing an embodiment of the wood invention. Three types of steel sheets, electrogalvanized steel sheets, minimum bangle finish hot-dip galvanized steel sheets, and cold-rolled steel sheets, were each treated according to the flow shown in FIG. 1 to produce coated steel sheets.
第１図の静電塗装（第３工程）て用いた粉体塗料はブロ
ックイソシアネートを硬化剤として含有するポリエステ
ル樹脂系粉体塗料■ベット＃４１００−ＮＫ （商標・
犬日木塗料ＫＫ製）である。この塗料は短時間硬化を目
的として従来の塗料に比へて次のような改良か加えられ
ている。すなはち、短時間硬化のために反応触媒の量を
増加させることによって硬化反応の速度を上げるととも
に、硬化時間か短縮されたことによって生しる塗膜表面
のワキを防止するための添加剤を加えたものとした。The powder coating used in the electrostatic coating (third step) in Figure 1 is a polyester resin powder coating containing block isocyanate as a hardening agent.
(manufactured by Inuhiki Paints KK). This paint has the following improvements compared to conventional paints for the purpose of curing in a short time. In other words, additives are used to speed up the curing reaction by increasing the amount of reaction catalyst for short curing times, and to prevent wrinkles on the surface of the paint film that occur due to the shortened curing time. was added.
使用した鋼板は、第１図の化成処理く第２工程）で示し
たように、各鋼板ともクロメート処理を行ったストリッ
プ状のものを用いた。また第４工程の誘導加熱炉の焼（
−１げにおいては、炉長５１ｍの誘導加熱炉を用いてラ
イン速度１０．２ｍ ７分の条件で処理したか、素材の
鋼板の最高到達温度は、２７０℃であり、冷却はずぺて
放冷で行った第５工程の放冷後、必要に応して第７エ程
で示す常温での軽圧下処理を行なった。かくして得られ
た硬化後の塗膜厚さは、実際には３０〜４０μの範囲内
に什トられる。The steel plates used were strip-shaped steel plates that had undergone chromate treatment, as shown in the chemical conversion treatment step (2) in FIG. 1. Also, in the fourth step, firing in an induction heating furnace (
-1 was processed using an induction heating furnace with a furnace length of 51 m and a line speed of 10.2 m for 7 minutes. After cooling in the fifth step, a light pressure treatment at room temperature as shown in the seventh step was performed as necessary. The thickness of the thus obtained cured coating film is actually within the range of 30 to 40 microns.
上記の軽圧下処理は、０５〜１５％の圧延率で行われる
が従来の粉体塗料による塗膜で得られない美しい、平滑
な表面を得るために行われるもので、外観を良くすると
ともに用途上、鮮映性を向上せしめる必要のある場合に
用いられる処理工程である。The above-mentioned light reduction treatment is performed at a rolling rate of 05 to 15%, and is performed in order to obtain a beautiful, smooth surface that cannot be obtained with conventional powder paint coatings. This is a processing step used when it is necessary to improve image clarity.
第１表から明らかなように、いずれの塗料においても、
鉛筆硬度値以外は同様な性能を示している。As is clear from Table 1, for any paint,
They show similar performance except for the pencil hardness value.
第２表は粉体ブレコー１−て、木発明による詰導加熱と
、従来行われてきた赤外線加熱及び、熱風加熱におりる
仕上げに要する硬化温度と硬化時間によって得られる性
能比較を示したものである。Table 2 shows a comparison of the performance obtained by using the powder brecco 1-condensation heating according to the wood invention, the conventional infrared heating, and the curing temperature and curing time required for finishing with hot air heating. It is.
赤外線加熱と熱風加熱によるプレコートは電気亜鉛めっ
き鋼板についてのみ第２表に掲示した。Precoating by infrared heating and hot air heating is listed in Table 2 only for electrogalvanized steel sheets.
第２表から明らかなように、誘導加熱においては溶融、
電気亜鉛めっき鋼板及び冷延鋼板とも、２６０℃−３０
秒の硬化処理で外観及び光沢度とも良好てほぼ一様な性
能を示したか、熱風加熱及び赤外線加熱では同一条件で
は外観及び光沢度とも著しく悪く、誘導加熱で得られる
性能に達するには２３０℃−１２０〜１．８０秒の硬化
処理を要した。なお、光沢度は６０’光沢度てＪＩＳＫ
５４００−６ ・７、鉛筆硬度はＪ Ｉ Ｓ Ｋ５４０
０−６ ・１４、耐衝撃性はＪ Ｉ ５Ｋ５４００−６
−１３−３ニ従った試験法ににり求めたものである。As is clear from Table 2, in induction heating, melting,
Both electrogalvanized steel sheets and cold rolled steel sheets: 260℃-30
After a second curing treatment, both appearance and glossiness were good and the performance was almost uniform.However, under the same conditions, hot air heating and infrared heating showed extremely poor appearance and glossiness, and it took 230℃ to reach the performance obtained with induction heating. A curing process of -120 to 1.80 seconds was required. In addition, the gloss level is 60' gloss level (JISK)
5400-6 ・7, pencil hardness is JIS K540
0-6 ・14, impact resistance is J I 5K5400-6
It was determined using the test method in accordance with -13-3.
第３表は、上記軽圧下処理による粉体プレコートの性催
比較を示したものてあり、軽圧下処理にはブライト仕上
げロールを用いた。比較として“圧下なし°′の場合の
数値を揚げた。Ｒｍａｘ （μｍ）は、表面粗さの測定
に関するＪＴＳＢＯ６０に従い、最大高さく Ｒｍａｘ
）を求めた値を示した。Table 3 shows a comparison of the properties of the powder precoat obtained by the above-mentioned light rolling treatment, and a bright finishing roll was used for the light rolling treatment. For comparison, we have listed the values for the case of "no reduction".Rmax (μm) is the maximum height Rmax according to JTSBO60 regarding surface roughness measurement.
) is shown.
巨１円
第３表にみられるように、ブライト仕上げロールによる
軽圧下処理を行うと、°“圧下なし°°に比へて光沢度
は約６％低下するか、鮮映性及びＲｍａＸとも性能向上
を示している。とくに、１．５％の圧下率においてはこ
の傾向が著しいが、通常は１．０％前後の圧下率が好ま
しい。As shown in Table 3, when light reduction treatment is performed using a bright finishing roll, the gloss level decreases by about 6% compared to the case without reduction, or the performance of both image clarity and RmaX decreases. This tendency is particularly remarkable at a rolling reduction of 1.5%, but normally a rolling reduction of around 1.0% is preferable.
なお、冷延鋼板の場合は第１図における化成処理（第２
工程）と静電粉体塗装（第３工程）の間に、必要に応じ
て溶剤型ブライマー塗装の焼付は工程を行う場合もある
が、この工程を挿入した場合も上記実施例と同様の塗膜
性能を示したので、ブライマー塗装工程を導入すること
を妨げるものではないことはいうまでもない。In addition, in the case of cold-rolled steel sheets, the chemical conversion treatment (second
If necessary, the baking process of solvent-based brimer coating may be performed between the electrostatic powder coating process (step) and the electrostatic powder coating (third process), but even if this process is inserted, the same coating process as in the above example will be applied. Needless to say, since the membrane performance has been demonstrated, this does not preclude the introduction of a brimer coating process.
〔発明の効果）
この発明はり上説明したとおり、コイルコーティングに
より高品質のプレコート鋼板の連続的、効率的な製造か
可能に７１った。また、粉体塗料を用いることで、」−
分な加工性をもち、かつ耐汚染性の優れたプレコート鋼
板の製造か可能になった。[Effects of the Invention] As explained above, this invention enables continuous and efficient production of high-quality pre-coated steel sheets by coil coating71. In addition, by using powder coating,
It has become possible to manufacture pre-coated steel sheets with excellent workability and stain resistance.
また、溶剤の揮発かなくクリーンな塗料の焼付けか可能
となった。さらに、誘導加熱炉を用いることで、ごみの
ない良好な塗膜表面か得られた。Additionally, it has become possible to bake paint cleanly without volatilization of solvents. Furthermore, by using an induction heating furnace, a good coating surface without dust was obtained.
さらに、改良型の塗料を用いることで３０秒と非常に短
い硬化時間で十分な性能か得られた。Furthermore, by using the improved paint, sufficient performance was obtained with a very short curing time of 30 seconds.
以上のほか、第２の発明として、製造方法の工程に加え
られた軽圧下ＩＡ埋では、第１の発明のみの場合にはみ
られない鮮映性と平滑性が得られる効果がある。In addition to the above, as the second invention, the light reduction IA embedding added to the process of the manufacturing method has the effect of obtaining image clarity and smoothness that cannot be seen in the case of the first invention alone.
第１図は本発明の一実施例を示す塗装鋼板の製造工程を
示すフロー図である。FIG. 1 is a flowchart showing the manufacturing process of a coated steel plate according to an embodiment of the present invention.
Claims (5)
より粉体塗料を塗装し、ついで誘導加熱の連続焼付によ
り該塗装膜の硬化を行い、３０〜４０μｍの厚さの塗膜
を形成する塗装鋼板の製造方法。(1) After chemical conversion treatment is applied to the surface of the steel plate, a powder coating is applied by electrostatic coating, and then the coating film is hardened by continuous baking with induction heating to form a coating film with a thickness of 30 to 40 μm. A method for producing a painted steel plate.
により粉体塗料を塗装し、ついで誘導加熱の連続焼付に
より該塗装膜の硬化を行い、３０〜４０μｍの厚さの塗
膜を形成し、さらに該塗膜を０．５〜１．５％の圧延率
で軽圧下処理を行う塗装鋼板の製造方法。(2) After chemical conversion treatment is applied to the surface of the steel plate, a powder coating is applied by electrostatic coating, and then the coating film is cured by continuous induction baking to form a coating film with a thickness of 30 to 40 μm. A method for producing a coated steel sheet, which comprises forming the coating film, and further subjecting the coating film to a light reduction treatment at a rolling ratio of 0.5 to 1.5%.
グル仕上の溶融亜鉛めっき鋼板及び冷延鋼板の三種から
選択された一種の鋼板である特許請求の範囲第１項及び
第２項記載の製造方法。(3) The manufacturing method according to claims 1 and 2, wherein the steel sheet is a type of steel sheet selected from three types: an electrogalvanized steel sheet, a hot-dip galvanized steel sheet with a minimum bangle finish, and a cold-rolled steel sheet. .
範囲第１項及び第２項記載の製造方法。(4) The manufacturing method according to claims 1 and 2, wherein the chemical conversion treatment is a chromate treatment.
トを用いたポリエステル樹脂系の粉体塗料である特許請
求の範囲第１項及び第２項記載の製造方法。(5) The manufacturing method according to claims 1 and 2, wherein the powder coating is a polyester resin powder coating using blocked isocyanate as a curing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18789186A JPS6344962A (en) | 1986-08-12 | 1986-08-12 | Preparation of painted steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18789186A JPS6344962A (en) | 1986-08-12 | 1986-08-12 | Preparation of painted steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6344962A true JPS6344962A (en) | 1988-02-25 |
| JPH0411269B2 JPH0411269B2 (en) | 1992-02-27 |
Family
ID=16214002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18789186A Granted JPS6344962A (en) | 1986-08-12 | 1986-08-12 | Preparation of painted steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6344962A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10035172B2 (en) | 2014-09-17 | 2018-07-31 | Fuji Xerox Co., Ltd. | Powder coating apparatus including a unit that charges and fluidizes a thermosetting powder coating material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5356236A (en) * | 1976-11-01 | 1978-05-22 | Mitsubishi Plastics Ind Ltd | Electrostatic powder coating |
-
1986
- 1986-08-12 JP JP18789186A patent/JPS6344962A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5356236A (en) * | 1976-11-01 | 1978-05-22 | Mitsubishi Plastics Ind Ltd | Electrostatic powder coating |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10035172B2 (en) | 2014-09-17 | 2018-07-31 | Fuji Xerox Co., Ltd. | Powder coating apparatus including a unit that charges and fluidizes a thermosetting powder coating material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0411269B2 (en) | 1992-02-27 |
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