1.简介

   一般机械五金零件、电子零件如果体积不大，构造坚固易于滚动的时候，在需要作电镀表面处理的时候，滚筒电镀 (Barrel Plating)即滚镀是最佳的选择，不必像吊镀一个一个的以人工挂上吊架，人工贵每工时产量又低。

        对这些相同的小零件如果想用涂装的时候，吊挂喷漆是可保证质量均一但是单一零件的涂装成本太高了，虽然吊挂喷涂涂装成本相对于吊挂电镀成本仍低唯涂装或电镀功能不同，依客户之需求而定。

        涂装滚涂的主要问题在于涂料在涂装后烘烤前有黏性的困扰 这是与电镀最大的不同，如何像电镀一样有滚镀的生产线一直是涂装界思考的问题，如（图一）所示是以各色两液型涂料一面薄喷一面烘烤 ( 约 60 – 80 度 C ) ，可喷出多种颜色配合各类金属钮扣衣服颜色是其优点，此法的质量缺点为光泽度低 表面因互相磨擦产生毛毛的感觉，浸旋 ( Dip / Spin ) 涂装也是一种涂装之方式 但用于黄铜电镀后薄涂一层透明喷漆为多。
 

(图一) 喷涂之滚筒涂装机


 

图六 螺丝滚镀电泳成品
  (录自 Product Finishing )

图五 : 大型滚筒电着

阴极环氧树脂(Epoxy)电泳漆 POWERCRON® XL Black

使用数据 APPLICATION DATA

烘烤Bake:  177 Deg. C x 20 分钟 ( 金属表面温度 )

涂膜特性 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
 

腐蚀试验CORROSION RESISTANCE / PANELS
 

材质/ 前处理方式 Substrate / Pretreatment

盐水喷雾试验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