1.簡介

         一般機械五金零件、電子零件如果体積不大，構造堅固易於滾動的時候，在需要作電鍍表面處理的時候，滾筒電鍍 (Barrel Plating)即滾鍍是最佳的選擇，不必像吊鍍一個一個的以人工掛上吊架，人工貴每工時產量又低。

        對這些相同的小零件如果想用塗裝的時候，吊掛噴漆是可保証品質均一但是單一零件的塗裝成本太高了，雖然吊掛噴塗塗裝成本相對於吊掛電鍍成本仍低唯塗裝或電鍍功能不同，依客戶之需求而定。

        塗裝滾塗的主要問題在於塗料在塗裝後烘烤前有黏性的困擾 這是與電鍍最大的不同，如何像電鍍一樣有滾鍍的生產線一直是塗裝界思考的問題，如（圖一）所示是以各色兩液型塗料一面薄噴一面烘烤 ( 約 60 – 80 度 C ) ，可噴出多種顏色配合各類金屬鈕扣衣服顏色是其優點，此法的品質缺點為光澤度低 表面因互相磨擦產生毛毛的感覺，浸旋 ( Dip / Spin ) 塗裝也是一種塗裝之方式 但用於黃銅電鍍後薄塗一層透明噴漆為多。
 

(圖一) 噴塗之滾筒塗裝機


 

圖六 螺絲滾鍍電泳成品
 (錄自 Product Finishing )

圖五 : 大型滾筒電著

陰極環氧樹脂(Epoxy)電泳漆 POWERCRON® XL Black

使用數據 APPLICATION DATA

烘烤Bake:  177 Deg. C x 20 分鐘 ( 金屬表面溫度 )

塗膜特性 FILM PROPERTIES

Property                                          Test Method                                      Performance

Color                                                       ---                                                  黑色 Black

Film Thickness                                    ---                                                    15 –30 微米 (0.6 - 1.2 Mils)

Gloss – 60 Degree                      ASTM D523-89                                    25 – 55

Pencil Hardness                        ASTM D3363-00                                 2H Minimum

Cross-Hatch Adhesion            ASTM D3359-02                                 4B - 5B

Salt Spray                                  ASTM B117-02                                   1000 Hours Minimum

Humidity                  ASTM D1735-02                 1000 Hours Minimum

Water Immersion             ASTM D870-02                    240 Hours Minimum

 Gravelometer                                GM 9508P                        6 Minimum

Rust Spot                                     GM 9632P                                           Zero (Avg)

Throwpower                              GM 9535P                                           12 - 15

Inches

Cure 20 Minutes @ 350°F Metal Temperature

Cold Rolled Steel Lab Panels, Zinc Phosphate Pretreatment 0.8 Mil ( 20 um ) Average Film Thickness

  hong2008cn7 19820424
 

腐蝕試驗CORROSION RESISTANCE / PANELS

材質/ 前處理方式 Substrate / Pretreatment

鹽水噴霧試驗Salt Spray* 1000 Hours       40 Cycle** Corrosion

CRS/Zinc Phos/Non-Chrome                             < 1 mm                                           2 – 3 mm

CRS/Zinc Phos/DI Water                                     1 - 2 mm                                         2 – 3 mm

CRS/Iron Phos/Non-Chrome                              2 – 4 mm                                        3 – 5 mm

CRS/Iron Phos/DI Water                                     2 – 4 mm                                        3 – 5 mm

CRS/Untreated                                                        1 – 3 mm                                        9 – 11 mm

Galvanized/Zinc Phos/Chrome                        -----                                                    0 – 2 mm

Cure 20 Minutes @ 350°F Metal Temperature

Cold Rolled Steel Lab Panels

(Average Total Scribe Creep)

* Salt Spray -ASTM B117-02