Meridian is a leader in magnesium die castings. With manufacturing facilities at key locations in Canada, the USA, the UK, Germany, China, and Mexico, they provide automotive OEMs all around the world with lightweight die castings.
Because OEMs need to start tracking castings early in the supply chain, Meridian had to find a solution to implement traceability directly in the casting plant.
A Harsh Die Casting Environment
The die casting plant is a harsh environment for any equipment, and Meridian’s is no exception. Their environment temperature is uncontrolled and oscillates between 10°C and 50°C, and the air is dusty.
These harsh conditions can be harmful for lasers, lead to downtimes, and drastically diminish their lifespan. Integration is key to protect the laser.
The Solutions
- Advanced cooling systems to prevent temperature build-up
- Fans/air knives to minimize dust and oxide build up on laser and camera lenses
- Replaceable lens protector to protect/clean the lens from dirt and debris
- Dust and fume management systems to maintain a clean environment
- Class-1 laser enclosure to ensure work safety
Maintaining the Equipment
Even though lasers require very low maintenance, this maintenance is critical in harsh environments. In Meridian’s case, it needs to be performed weekly.
Laserax’s support team was there during the beginning of the operations to teach the shopfloor crew how to maintain the laser machines, with the goal to prevent downtimes and maximize the lasers’ lifespan.
According to their manufacturing engineer, they don’t foresee any major problems with the machine if they continue their weekly maintenance routine.
Manually Loaded Workstations
Meridian acquired several manually loaded rotary workstations to track a range of castings as requested by their OEM client. Each line has its own laser workstation to identify and track individual castings.
Operators simply load the castings onto the station, fix them into position onto one side of a rotary table, then launch the laser marking operation. While a casting is marked, operators can unload a previously marked casting and fix a new one into position on the other side of the table. This keeps them busy and helps keep up with challenging cycle times.
Automated Laser Machines for Pallet Conveyors
Following the success of the manually loaded workstations, Meridian acquired conveyor laser marking machines for their pallet conveyor line in a different plant.
These machines are fully automated, but operators can view the marking operations through a laser-safe window and use an HMI to diagnose the laser.
The machines are powered by 3D fiber lasers for two reasons: to compensate for part positioning errors due to the conveyor’s imprecision, and to reduce mechanical complexity by marking at a 45° angle.
The laser machine communicates with vision cameras located earlier on the line to encode the inspection information in the identifiers.
A Technology that is There to Stay
Meridian’s lasers consistently generate high-contrast identifiers on their magnesium die castings, allowing them to meet OEM traceability requirements.
Rotary Laser Marking Workstation 
Automated Conveyor Laser Marking Machine