Patent ID: 8991050
Filing Date: 2015-03-31
Classification: B32B,B41B,B41C,B41N,C23C,C25D,Y10T

Abstract:
1. A method for manufacturing a gravure cylinder used to transfer ink onto packaging material, the gravure cylinder including a layer of hard copper for engraving a pattern and a layer of chromium for hardening and resistance to wear, the method comprising: roughening the cylinder surface of an aluminium base cylinder by mechanical means; pre-coating the cylinder surface with 10-50 μm copper using thermal spraying; finishing the cylinder surface with sandpaper of 400 mesh; electroplating with a copper layer of 100-300 μm without hardener; electroplating with a copper layer of at least 200 μm with a catalyst for hardness; polishing the cylinder surface; engraving the cylinder; and chromium plating the cylinder surface with a coating of 6-10 μm.