Coding of Particle Filters

Definition of Task

Ceramic particle filters for the automotive industry are coded with a CO₂-Laser while resting in two parallel operating machines

Code consists of four arrows indicating the flow direction and a data matrix code
Data matrix code consists of an automated date field and a six digit counter
Date is encoded by the julian day and two digits indicating the year
Counter is initialized each day
Since the ceramic material reacts by showing a black color change, the data matrix code is printed as positive
Next to the data matrix code its content is printed as a readable alphanumerical code

Customer has chosen the REA CL laser system for its high print image quality and for the reason of printing indelible marks on the ceramic filters
Especially the automotive sector products are exposed to extreme environmental conditions for several years and still have to meet the tough traceability requirements which are mandatory in this industrial sector