Critical Automotive Brackets require individual piece traceability. License plate numbering using bar codes would guarantee that each bracket ;
• Is the correct type
• Has passed all tests
• Can be traced back to specific lots and/or inspections
• Has a complete historical process database
Traditional bar code labels are not suitable for identification here because each bracket is later primed and painted after assembly. Adhesive labels would prevent proper priming and painting . Adhesive label edges can then lift , producing a potential bare rust point.
Marking is accomplished at four consecutive fixtured conveyor stations:
Black Patch Painting ( @ Station #1) and White Patch Painting ( @ Station #3) each require less than 1 sec.
Laser marking requires 2.5 sec. Stepping between stations requires 1.5 sec.
Tack drying at station #2 is accomplished by blowing heated air on the black patch during the move from station #1 to Station #3.
The overall cycle is then 4 sec (15 parts / min)
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