The static electricity generated upstream of the filling position often causes the tablet to bounce out of the blister groove of the cover plate. This is usually because the tablet and the cover plate have the same polarity of static electricity. In most cases, an ion rod is installed at the end of the tablet transfer tank to solve these problems.
On some production lines, a removable or rotatable brush is used to correct tablet irregularities. These brushes will generate static electricity again, and the second ion stick should be installed just after the blister leaves the brush. Neutralizing static electricity upstream can help improve results in critical locations, especially where static electricity can cause headaches. There are two effective critical locations that require electrostatic treatment before filling. One is the position where the tablet is unfolded from the chute to the tray, and the other is the position of the blister thermoforming outlet before the filling process. This strengthens the elimination of static electricity and prevents contaminants from sticking to the tray.
If the pallets on the production line are already contaminated, you can use an ion fan to neutralize the static electricity in the grooves of the pallets before filling. Due to the static electricity, the tablets will be attracted to different positions on the production line. The two prominent positions are the feeder (if used) and the transfer chute. Installing a small ion fan or ion rod above the feeder or installing a single-point ion rod at the entrance of the chute can solve the problem of tablet transfer, adhesion and blockage.