Automatic Broken Tablet Rejection on Tablet and Capsule Counting Machines

At Interpack 2017 Cremer and Deckert both showcased Cremer counters with camera inspection systems and automatic reject of individual capsules. Camera detection of broken, rogue or discoloured tablet or capsules is nothing new, however previously reject took place either manually or a container was rejected. To ensure the rejected tablet or capsule was rejected often more than 1 container was rejected. The new automatic broken tablet rejection systems presented at Interpack involved pneumatic suction systems that automatically removed the defective tablets or capsules from the infeed tracks. This new approach maximises yield while minimising downtime.

At Interpack 2017 Cremer and Deckert both showcased Cremer counters with camera inspection systems and automatic reject of individual capsules. Camera detection of broken, rogue or discoloured tablet or capsules is nothing new, however previously reject took place either manually or a container was rejected. To ensure the rejected tablet or capsule was rejected often more than 1 container was rejected. The new automatic broken tablet rejection systems presented at Interpack involved pneumatic suction systems that automatically removed the defective tablets or capsules from the infeed tracks. This new approach maximises yield while minimising downtime.

https://www.youtube.com/watch?v=Vd1q1avwkoQ?rel=0

Automatic Tablet Reject on Standalone Counter

On a standalone counter like the CFS 622 shown above once a defect is identified, a pneumatic arm moves across the 36 channels to remove the detective tablet or capsule. After this the machine restarts without having to reject a container.

Automatic Tablet Reject on Cremer Counter Integrated into Deckert TVM Monoblock counter

On the TVM a single CF622 module with 6 channels counts the tablets into bottles. Here the reject mechanism consists of 6 pneumatically actuated reject arms, one for each channel. The arm moves quickly to remove the broken or otherwise rejected tablet.

Monoblock Rotary Filling Capping on which Automatic broken tablet rejection can be fitted 
Monoblock Rotary Filling Capping on which Automatic broken tablet rejection can be fitted

Reject Criteria for Automatic Broken Tablet Rejection

The automatic tablet reject system can reject for the following causes.

  • Broken pieces by pixel count
  • Broken pieces by length or width
  • Colour defects
  • Spots
  • Rogue tablets
  • Open capsules

The camera looks from above and is restricted to what it can see above. In order to improve the camera’s viewing angle and narrow tolerances, flat camera plates can be fitted to the Cremer. These improve the aspect ratio visible to the camera. These flat plates optimise the contrast to the tablet as seen below.

Flat Camera Plates on Cremer Tablet Counter
Flat Camera Plates on Cremer Tablet Counter