What should I do if the tablet machine has mottling, printing spots and lamination?

One: The causes and treatment of variegated and printed spots are as follows:

Dappled and printed spots refer to spots with different shades of color on the surface of the tablet, resulting in unqualified appearance.

1. Because the oil stains from the upper punch fall into the particles when the tablet is pressed, the oil stains need to be removed, and a rubber ring is placed on the upper punch sleeve to prevent the oil stains from falling into.

2. Excessive amount of binder, too hard granules, melting of powdered sugar in sugar-containing varieties or granules of colored tablets can be caused by uneven coloring, uneven wet and dry, uneven elasticity or insufficient mixing of lubricant. Imprint. The granulation process can be improved to make the granules loose. The colored tablets can be granulated by uniform coloring, and the granules obtained are uniform in thickness and suitable in tightness. .

3. The depth of the raw materials and auxiliary materials in the compound tablets are different. If the raw materials and auxiliary materials are not finely ground or well mixed, it is easy to produce mottling. The granules should be ground before the granulation. Spots should be reworked.

4. The colored varieties are polluted due to incomplete cleaning.

Two: The reason and treatment of lamination are as follows:

Lamination means that two pieces are stacked together.

The tablet sticks to the upper punch due to the reasons such as stick punching or upper punch curling. At this time, the particles are filled into the die holes and pressed again to form a laminated tablet or the lower punch rise position is too low to push the tablet out in time At the same time, the particles are added into the die holes and repeatedly pressurized. Pressing into laminations makes the tablet press vulnerable to damage. It should solve the problem of sticking and punching, match the punch, improve the accuracy of the die, and eliminate the fault of the tablet press.