Frame electroplating
Rack electroplating is a process for electroplating metal on goods. You put this on a frame. The frame must conduct the electrical current well to the workpiece. The workpiece must be fixed in a position favorable for the coating process by the contact wires of the frame. The position influences the subsequent layer thickness distribution on the workpiece.
The process is mainly used on surfaces whose appearance is to be viewed as very critical, such as decorative strips, faucets or shower heads. A chemical-resistant plastic (such as ISOFAN ®) is used for insulation . This ensures that the material to be electrodeposited is only deposited on the article to be coated. Only those areas on a frame that are in direct contact with the attached workpiece, usually the ends of the contact wires, may be free of coating. The current is transmitted to the frame of the rack and to the contact wires via the system-side carrier of the electroplating system. In this way, the part to be coated receives the electricity required for the process. Furthermore, the goods must be contacted in such a way that the entrainment of liquids (e.g. electrolyte ) and the inclusion of air in part sinks or holes are as low as possible. In addition to static rod and frame racks, bogies, tilting racks and swivel racks are therefore used for many difficult part geometries. Three-dimensional part movement in the electroplating bath can thus guarantee an optimal coating result.
See also: galvanization , barrel galvanizing
Individual evidence
- ↑ Wilfried König: Manufacturing process 3 Ablation, generation and laser material processing . Springer-Verlag, 2006, ISBN 978-3-540-48954-2 , pp. 190 ( limited preview in Google Book Search).
- ↑ gestellbau.com: Plastic coatings - Seemann Gestellbau GmbH , accessed on March 15, 2017
- ^ Friedrich-Wilhelm Bach, Kai Möhwald, Andreas Laarmann, Thomas Wenz: Modern coating processes . John Wiley & Sons, 2006, ISBN 978-3-527-60889-8 , pp. 122 ( limited preview in Google Book search).