Method of manufacturing a piece plastic material having a decor metal which moves away from one pattern visually

摘要

To produce a plastics piece, with a metal decoration giving a visual dimension, it is molded and the pattern area is engraved on the surface by an electromagnetic beam from a laser. The laser beam forms a surface abrasion (R) of a greater depth than the natural abrasion (r) of the plastics surface and preferably 5-50 times the natural abrasion depth, to give a number of successive peaks. To produce a plastics piece (1), with a metal decoration (6) giving a visual dimension, it is molded and the pattern area is engraved on the surface (1a) by an electromagnetic beam (4) from a laser (2). The laser beam forms a surface abrasion (R) of a greater depth, e.g. 10-100 microns, than the natural abrasion (r) of the plastics surface and preferably 5-50 times the natural abrasion depth, to give a number of successive peaks. The micro-porosity of the material is sealed by chemical plating with nickel and give the conductivity for electroplating a metal layer (14) using a noble metal e.g. gold or chrome, with a greater thickness (E) at the peaks (16) than the thickness (e) in the valleys (10) to give a E:e ratio of about 2. The metal can be deposited in a vacuum.