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Install the small parts that have undergone pre plating treatment into the roller, and the parts rely on their own gravity to tightly press the cathode conductive device inside the roller to ensure the smooth transmission of the required current when the parts are plated. Then, the roller rotates at a certain speed in a certain direction, and the parts continuously roll and fall after being rotated within the roller. At the same time, the main metal ions are reduced to metal coatings on the surface of the parts under the action of an electric field. Fresh solution outside the roller is continuously replenished into the roller through numerous small holes on the roller wall plate, and the old solution inside the roller and hydrogen gas generated during the plating process are also discharged out of the roller through these small holes.

Suitable for plating small parts that cannot or are not suitable for hanging due to factors such as shape and size. Compared with early small parts plating using hanging plating or basket plating, it saves labor, improves labor production efficiency, and greatly improves the surface quality of the plated parts.