Project: Automatic assembly and laser marking of tubes
Industry: Medical Industry
Location: Switzerland
The machine shown here affixes a plastic disc on a non-writable plastic container (tube) which is then labelled by laser with a 2D matrix code for identification. The finished tube is used for forensic purposes.
The tubes are injection moulded and stored in bulk form after being expelled from the moulding machine. Conveyor pans feed the various tube types and the labelling discs on our machine. On the machine itself, you only have to replace the receptacles on the revolving assembly table if the product is changed.

A small quality batch can be easily produced after installation. These parts are discharged from the system at a dedicated discharge point.
A specific station to check if the labelling discs have been properly pressed into the tubes is provided on the revolving assembly. The tubes are labelled with a TRUMPF TruMark 3130 laser. A vision system reads the 2D matrix code back in and checks it for correctness.

At each stroke of the machine, two tubes are processed simultaneously. The cycle time is 3.2 seconds for 2 parts.

Functional description:
  • Tubes fed in through interchangeable bowl feeders
  • Tubes are separated and dispensed
  • The tubes are placed into a step conveyor system
  • Handling by rotation device to insert the parts in the receptacles on the revolving assembly table
  • Labelling discs pressed into the tubes
  • Check of pressing process
  • Laser labelling of the two tubes with a 2D matrix code
  • Code check with vision system
  • Removal of parts and storage in the OK or NOK container.