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Roller coating machine light common fault

时间:2016-04-17 14:46来源:sankun点击:
             Use roller coating machine light common faults and elimination method

1. Poor luster: may the reason is:
A. glazing oil quality is poor, the solution is to replace oil polish;
B. glazing oil viscosity is small, thin coating; The solution is to increase gloss oil viscosity;
C. poor paper, surface coarse; In the solution is to creation with casein or twice on light oil;
D. bake, low temperature, dry slow; The solution is to increase the temperature;


2. The printing after polish stick together: possible reasons are:
A. coating layer is too thick; Solution is to adjust the volume of coating;
B. glazing oil dry slow, resulting in poor drying; The solution is to speed up the drying speed, raise the temperature;
C. bake, low temperature; The solution is to increase the temperature;
D. ventilation; The solution is to increase air circulation;
E. after glazing printed matter accumulation is too high; The solution is to reduce the finished product stack height.


3. The coating brittle, dry not folding: possible reasons are:
A. oil polish folding resistance is poorer; The solution is to replace oil polish;
B. glazing oil and ink does not adapt, poor adhesion; The solution is to replace oil polish;
C. post-press processing is undeserved, such as improper die cutting operation, etc.; The solution is to change the post-press processing conditions;

4. The coating unevenness, hair flower: possible reasons are:
A. polishing oil for printing ink adhesion is poor; The solution is to replace oil polish;
B. glazing oil viscosity is too low; The solution is to increase gloss oil viscosity;
C. printing ink layer surface has crystallization; Solution is to add 5% of lactic acid in gloss oil;

5. Decoloring: the reason may be that:
A. wet ink, solvent resistance is poor; The solution is to increase print drying time;
B. glazing oil solvent ink has erosion; The solution is to replace oil polish.

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