Process classification of barrel silver plating
Strictly speaking, barrel plating is called barrel plating, which is to place a certain number of small parts in a special barrel, and deposit various metal or alloy coatings on the surface of the parts in a rolling state in an indirect conductive manner to achieve surface protection and decoration. Or a form of plating for functional intent. It is characterized by large batches of small parts, and the thickness of the coating is less than 10μm.
Barrel silver plating is suitable for the electroplating of small parts that cannot or should not be mounted due to factors such as shape and size. Compared with the earlier small parts electroplating using rack plating or basket plating, it saves labor and improves production efficiency. And the surface quality of the plated parts is also greatly improved.
Classification of Barrel Silver Plating Processes
The silver barrel plating process is divided into three categories: horizontal barrel silver plating, skewed barrel silver plating and oscillation plating.
1. Horizontal barrel silver plating
The shape of the horizontal barrel silver-plating drum is "bamboo cylinder" or "column", and it is placed horizontally when used. The axis of the drum is horizontal, so horizontal barrel silver plating is also called horizontal horizontal barrel silver plating. Hexagonal drums, chrome-plated drums, rod-shaped (or spoke) drums, sewing needle drums, etc., which are common in production, all belong to the category of horizontal barrel silver plating. Among them, hexagonal rollers are widely used.
2. Skewed barrel silver plating
The shape of the skewed barrel silvering cylinder is "bell" or "bowl", so the skewed cylinder is also called a bell cylinder. The axial direction of the drum is about 40o to 45o from the horizontal plane, and the running direction of the parts is inclined to the horizontal plane, and the name of the inclined barrel silver plating comes from this.
3. Oscillation electroplating
Oscillation electroplating is a new technology for small parts electroplating that was widely used in the late 1970s and early 1980s. It has more prominent advantages than the conventional barrel silver plating technology, so it is quickly used and developed as soon as it is available.