JPH05228433A - Coated steel plate excellent in molding processability - Google Patents
Coated steel plate excellent in molding processabilityInfo
- Publication number
- JPH05228433A JPH05228433A JP6945292A JP6945292A JPH05228433A JP H05228433 A JPH05228433 A JP H05228433A JP 6945292 A JP6945292 A JP 6945292A JP 6945292 A JP6945292 A JP 6945292A JP H05228433 A JPH05228433 A JP H05228433A
- Authority
- JP
- Japan
- Prior art keywords
- film
- coated steel
- powder
- coating film
- particle size
- 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
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【００１】[001]
【産業上の利用分野】本発明は、塗膜に表面粗度を付与
することにより成形加工の際の塗膜耐傷付き性、耐塗膜
剥離性を改善した塗装鋼板に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coated steel sheet having a coating film provided with a surface roughness to improve the scratch resistance and peeling resistance of the coating film during the forming process.
【００２】[002]
【従来技術】近年、家電製品、音響機器、鋼製家具など
の分野では、冷延鋼板やめっき鋼板を成形加工した後、
塗装して部材を製造する方法に代えて、塗装鋼板を直接
成形加工して、製造する方法が採用されている。この製
造方法では、成形加工の際塗装鋼板の塗膜がしごかれる
ので、塗装鋼板としては、塗膜の耐傷付き性、耐塗膜剥
離性に優れたものを要求される。2. Description of the Related Art In recent years, in the fields of home appliances, audio equipment, steel furniture, etc., after cold-rolled steel sheets and plated steel sheets are formed and processed,
Instead of a method of manufacturing a member by painting, a method of directly forming a coated steel plate and manufacturing it is adopted. In this manufacturing method, the coating film of the coated steel sheet is squeezed during the forming process, so that the coated steel sheet is required to have excellent scratch resistance and peeling resistance.
【００３】塗膜の耐傷付き性、耐塗膜剥離性を改善する
方法としては、（１）塗膜硬度を高くする方法、（２）
塗膜表面に保護フィルムを貼付ける方法、（３）塗膜中
または塗膜表面に有機系ワックスを添加もしくは塗布す
る方法がある。As a method for improving the scratch resistance and the peeling resistance of the coating film, (1) a method of increasing the coating hardness, (2)
There is a method of sticking a protective film on the surface of the coating film, and (3) a method of adding or coating an organic wax in or on the surface of the coating film.
【００４】[004]
【発明が解決しようとする課題】しかしながら、（１）
の方法の場合、塗膜硬度を樹脂組成的に高くして、耐傷
付き性を改善すると、塗膜加工性が低下し、逆に塗膜硬
度を樹脂組成的に低くすると、耐塗膜剥離性が劣化して
しまう。このため、両者を最高の状態にするのが極めて
困難であった。[Problems to be Solved by the Invention] However, (1)
In the case of the method of (1), if the coating film hardness is increased in terms of the resin composition and the scratch resistance is improved, the coating processability decreases, and conversely, if the coating hardness is decreased in the resin composition, the coating film peeling resistance Will deteriorate. For this reason, it has been extremely difficult to bring them to the best condition.
【００５】また、（２）の方法の場合は、保護フィルム
の貼付けやそれを用いることによる塗装鋼板のコストア
ップのほかに、成形加工後保護フィルムを剥離しなけれ
ばならず、しかも、剥離の際保護フィルムが破れたり、
経時的に接着力が上昇して容易に剥離しなくなったりし
て、成形加工後の作業が繁雑になるものであった。さら
に、（３）の方法の場合は、成形加工後ワックスを洗浄
除去して乾燥しなければならないため、やはり成形加工
の作業が繁雑になるものであった。In addition, in the case of the method (2), in addition to attaching the protective film and increasing the cost of the coated steel sheet by using the protective film, the protective film must be peeled off after the forming process, When the protective film is torn,
The adhesive strength increased with time and the peeling did not occur easily, and the work after the molding process became complicated. Furthermore, in the case of the method (3), the wax must be washed off and dried after the molding process, so that the molding process also becomes complicated.
【００６】[0096]
【課題を解決するための手段】本発明は、上記のような
欠点のない塗装鋼板を提供するもので、塗膜中に平均粒
径が塗膜厚の１／２倍で、最大粒径のものが塗膜厚の２
倍以下である粉末骨材を分散させた。The present invention provides a coated steel sheet which does not have the above-mentioned drawbacks. The average grain size in the coating film is 1/2 times the coating thickness and The thickness of the coating is 2
Less than twice the amount of powder aggregate was dispersed.
【００７】[0097]
【作用】本発明の塗装鋼板は、粉末骨材の平均粒径が塗
膜厚の１／２倍で、最大粒径が塗膜厚の２倍以下である
と、塗膜表面より突出する粒子が多いので、成形加工の
際のポンチやロ−ルなどはこの凸部にだけ作用し、塗膜
の凹部には接触しない。このため、塗膜の凹部は保護さ
れ、傷が付かない。しかし、塗膜の凸部には傷が付く
が、この傷は非常に細かいものが表面全体に分散したも
のであるため、外観的に目立たず、見かけ傷がないよう
に見えるのである。In the coated steel sheet of the present invention, when the average particle diameter of the powder aggregate is 1/2 times the coating thickness and the maximum particle diameter is 2 times the coating thickness or less, the particles protruding from the coating surface Therefore, punches, rolls, etc. during the molding process act only on the convex portions and do not contact the concave portions of the coating film. Therefore, the concave portion of the coating film is protected and is not scratched. However, although the protrusions of the coating film are scratched, the scratches are very fine and are dispersed over the entire surface, so they are visually inconspicuous and appear to have no apparent scratches.
【００８】塗膜中に分散させる粉末骨材を平均粒径が塗
膜厚の１／２倍で、最大粒径のものが塗膜厚の２倍以下
にしたのは、表面粗度をある程度大きくして、塗膜凸部
に生ずる傷の比率を少なくして、外観上傷が目立たない
ようにするためである。平均粒径、最大粒径のものがこ
れらの値未満であると、表面粗度が小さくなるため、見
かけ上の傷付き防止効果はなく、逆にその値を超える
と、塗膜の連続性が失われ、耐食性が低下する。The average particle size of the powder aggregate dispersed in the coating film was 1/2 times the coating film thickness, and the maximum particle size was 2 times or less the coating film thickness because the surface roughness was to some extent. This is to increase the size of the coating film to reduce the rate of scratches generated on the convex portions of the coating film so that the scratches are not noticeable in appearance. If the average particle size and the maximum particle size are less than these values, the surface roughness becomes small, so there is no apparent scratch-preventing effect. It is lost and corrosion resistance is reduced.
【００９】粉末骨材としては、シリカ粉末、ＰＴＦＥ
（ポリテトラフルオロエチレン）粉末、マイカ粉末など
を使用すればよい。この粉末骨材の添加量は、塗膜の１
〜１５重量％にするのが好ましい。１重量％未満である
と、成形加工の際、ポンチやロ−ルなど受ける凸部が少
ないため、押し潰され、凹部にも傷が付いてしまう。一
方、１５重量％を越えると、塗膜の加工性が低下し、割
れが発生する。As the powder aggregate, silica powder, PTFE
(Polytetrafluoroethylene) powder, mica powder or the like may be used. The addition amount of this powder aggregate is 1 of the coating film.
It is preferably about 15% by weight. If the amount is less than 1% by weight, the number of convex portions such as punches and rolls that are received during the molding process is small, so that it is crushed and the concave portions are also scratched. On the other hand, if it exceeds 15% by weight, the workability of the coating film deteriorates and cracks occur.
【０１０】[0101]
【実施例】板厚０.８ｍｍの溶融亜鉛めっき鋼板に下記
塗膜を形成したものを試験材に用いて成形加工試験を実
施した。 （１）本発明塗装鋼板 平均粒径１０μｍ、最大粒径のもの３５μｍの結晶質シ
リカ粉末を１０重量％添加して、分散させたポリエステ
ル系塗膜を２０μｍ形成したもの。 （２）比較例１塗装鋼板 前記本発明塗装鋼板に使用したポリエステル系塗膜を粉
末骨材を添加せずに２０μｍ形成したもの。 （３）比較例２塗装鋼板 塗膜硬度を樹脂組成的に高くしたポリエステル系塗膜を
２０μｍ形成したもの。Example A forming test was carried out by using a hot-dip galvanized steel sheet having a plate thickness of 0.8 mm and having the following coating film formed thereon as a test material. (1) Coated steel sheet of the present invention A product having a polyester coating film of 20 μm dispersed by adding 10% by weight of crystalline silica powder having an average particle size of 10 μm and a maximum particle size of 35 μm. (2) Comparative Example 1 Coated Steel Sheet The polyester coating film used in the coated steel sheet of the present invention was formed in a thickness of 20 μm without adding powder aggregate. (3) Comparative Example 2 Coated Steel Sheet A polyester-based coating film having a coating film hardness of 20 μm increased in terms of resin composition.
【０１１】第１表にこれらの塗装鋼板の塗膜物性を示
す。Table 1 shows the coating film physical properties of these coated steel sheets.
【第１表】 （注）塗膜密着性での０ｔは１８０度密着折り曲げを、
１ｔおよび２ｔは同板厚の鋼板を内側に挟んで１８０度
密着折り曲げをしたもので、○印は塗膜割れなし、×印
は塗膜割れ発生を意味している。[Table 1] (Note) 0t in coating adhesion is 180 degree adhesion bending,
In 1t and 2t, steel plates having the same plate thickness are sandwiched inside and bent by 180 degrees, and ∘ indicates that there is no cracking of the coating film, and x indicates that cracking of the coating film occurs.
【０１２】これらの塗装鋼板より幅４０ｍｍ、長さ１０
０ｍｍの寸法の試験片を調製して、図１および図２に示
す端曲げフランジ加工装置で成形加工試験を実施した。
この装置は、図１に示すように、下側のダイスホルダ−
１およびダイス２と上側の板押さえ３とで塗膜側を上に
した試験片４を水平に、しかも、塗膜剥離試験部分がポ
ンチ５側に突出するように保持して、ポンチ５でその突
出したフランジ部分を図２のように折り曲げるようにな
っている。Width 40 mm, length 10 from these coated steel sheets
A test piece having a size of 0 mm was prepared, and a molding processing test was performed by the end bending flanging apparatus shown in FIGS. 1 and 2.
This device, as shown in FIG. 1, has a lower die holder-
1 and the die 2 and the plate holder 3 on the upper side hold the test piece 4 with the coating film side up so that the coating film peeling test portion projects toward the punch 5 side, and the punch 5 The protruding flange portion is bent as shown in FIG.
【０１３】なお、ダイス２とポンチ５の間隔Ｄ、ポンチ
５の肩半径Ｒ1は変更できるようになっている。試験に
際しては、ダイス２とポンチ５の間隔Ｄを０.８ｍｍ、
ダイス２の肩半径Ｒ2は０ｍｍに設定して、試験片４の
ポンチ５側に突出するフランジ長さＬ、ポンチ５の肩半
径Ｒ1を種々変更した。第２表にこの結果を示す。The distance D between the die 2 and the punch 5 and the shoulder radius R 1 of the punch 5 can be changed. In the test, the distance D between the die 2 and the punch 5 is 0.8 mm,
The shoulder radius R 2 of the die 2 was set to 0 mm, and the flange length L of the test piece 4 protruding toward the punch 5 side and the shoulder radius R 1 of the punch 5 were variously changed. Table 2 shows the results.
【０１４】[0142]
【第２表】 （注１）塗膜剥離は、ポンチに接触した面の塗膜剥離状
態を示し、評価点５の場合、塗膜剥離が発生しなくて、
評価点が小さくなる程発生し、評価点０の場合は接触面
全幅に塗膜剥離が発生したことを示す。 （注２）塗膜割れは、折り曲げ部に発生した塗膜割れを
示し、○印は発生せず、×印は発生したことを示す。[Table 2] (Note 1) The peeling of the coating film indicates the peeling state of the coating film on the surface in contact with the punch.
The smaller the evaluation point is, the more it occurs. When the evaluation point is 0, peeling of the coating film occurs over the entire width of the contact surface. (Note 2) The cracks in the coating film indicate cracks in the coating film that have occurred at the bent portion, and the mark ◯ does not occur and the mark x indicates that they have occurred.
【０１５】[0115]
【発明の効果】以上のように、本発明の塗装鋼板は、成
形加工性が優れているので、そのまま加工するだけでよ
い。As described above, since the coated steel sheet of the present invention has excellent formability, it can be processed as it is.
【図１】実施例で塗装鋼板の成形加工試験に使用した端
曲げフランジ加工装置で、試験片を曲げ加工する前の状
態を示している。FIG. 1 shows a state before a test piece is bent by an end bending flanging apparatus used in a forming test of a coated steel sheet in an example.
【図２】実施例で塗装鋼板の成形加工試験に使用した端
曲げフランジ加工装置で、試験片を曲げ加工した後の状
態を示している。FIG. 2 shows a state after bending a test piece by an end bending flange processing apparatus used in a forming processing test of a coated steel sheet in an example.
Claims (1)
で、最大粒径のものが塗膜厚の２倍以下である粉末骨材
を分散させたことを特徴とする成形加工性に優れた塗装
鋼板。1. A powder aggregate in which the average particle size is 1/2 times the coating thickness and the maximum particle size is 2 times or less the coating thickness is dispersed in the coating film. Painted steel sheet with excellent formability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06945292A JP3195638B2 (en) | 1992-02-19 | 1992-02-19 | Painted steel sheet with excellent formability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06945292A JP3195638B2 (en) | 1992-02-19 | 1992-02-19 | Painted steel sheet with excellent formability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05228433A true JPH05228433A (en) | 1993-09-07 |
| JP3195638B2 JP3195638B2 (en) | 2001-08-06 |
Family
ID=13403054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06945292A Expired - Fee Related JP3195638B2 (en) | 1992-02-19 | 1992-02-19 | Painted steel sheet with excellent formability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3195638B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015145482A1 (en) * | 2014-03-24 | 2015-10-01 | 日新製鋼株式会社 | Coated metal plate and exterior building material |
| WO2015145481A1 (en) * | 2014-03-24 | 2015-10-01 | 日新製鋼株式会社 | Coated metal plate and exterior building material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102552407B1 (en) * | 2021-09-30 | 2023-07-07 | 주식회사 현대엘앤씨 | Non-screw type mohair assembly structure |
-
1992
- 1992-02-19 JP JP06945292A patent/JP3195638B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015145482A1 (en) * | 2014-03-24 | 2015-10-01 | 日新製鋼株式会社 | Coated metal plate and exterior building material |
| WO2015145481A1 (en) * | 2014-03-24 | 2015-10-01 | 日新製鋼株式会社 | Coated metal plate and exterior building material |
| CN106103081A (en) * | 2014-03-24 | 2016-11-09 | 日新制钢株式会社 | Coated metal plate and exterior building materials |
| RU2649100C1 (en) * | 2014-03-24 | 2018-03-29 | Ниссин Стил Ко., Лтд. | Coated metal plate and external building material |
| US9999904B2 (en) | 2014-03-24 | 2018-06-19 | Nisshin Steel Co., Ltd. | Coated metal plate and exterior building material |
| US10077367B2 (en) | 2014-03-24 | 2018-09-18 | Nisshin Steel Co., Ltd. | Coated metal plate and exterior building material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3195638B2 (en) | 2001-08-06 |
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