In the case of using the quality of the coated powder, the problems often occurring in the operation of the coating machine and the solutions are as follows:
1. Adhesive sheet: It is mainly because the spray volume is too fast, which violates the principle of solvent evaporation balance and causes the sheets to stick to each other. In this case, the coating machine should be appropriately reduced, the hot air temperature should be increased, and the speed of the pan should be increased.
2, the appearance of "orange peel" film: mainly due to improper drying, the spray pressure of the coating liquid is low, so that the sprayed droplets are unevenly heated and the film is corrugated. In this case, the evaporation rate should be controlled immediately to increase the spray pressure.
3, "bridge": refers to the film on the lettering film caused by the logo is blurred. The solution is to slow down the spray speed of the coating and reduce the drying temperature, and at the same time, control the hot air temperature coating machine.
4, the appearance of stains: This situation is caused by uneven mixing with the coating liquid or the fineness of the solid traits. The solution is to fully mix the uniform coating machine with the coating liquid.
5. Cracks, cracks, flaking or edge wear of the tablets on the surface or edge of the tablet: if the solid content of the coating liquid is improperly selected, the speed of the coating machine is too fast, and the spray volume is too small, the appropriate coating liquid should be selected. Solid content, appropriate adjustment of the speed and the amount of spray; if the core hardness is too bad, you should improve the core formula and the technical title of the computer test.