Longitudinal direction tinted always no? Quick check this four aspects.

by:Kolysen     2020-12-04
Plastic film is badly aligned flexible packaging factory is one of the common faults. Mainly divided into longitudinal direction ( Ship side direction) Printing set department must change and horizontal alignment unstable two cases. Today, we have to focus on the way, result in longitudinal direction ( Ship side direction) Four main reasons of printing registration change. 1, film pulling tension fluctuation reasons: an open-book device of the drum brake modulation improper; Drum material too much, or as tube diameter is too large; Three roller speed Settings; Three roller surface friction on the surface of the drop; Changes in the tension of rewinding machine. Countermeasures: check the adjusting control device. 2, the plate cylinder diameter bad bad reason: plate making path difference when growth is not allowed. Countermeasures: measuring diameter difference ( Methods: see plate part) 。 3, rule line abnormal reasons: strong ( The secret) Degree is insufficient, offset printing, etc. Countermeasures: to adjust the sensitivity of photocell, artificial plate paste version, etc. 4, the smaller the diameter of the plate cylinder reasons: the smaller diameter roller overprint precision is difficult to control. Countermeasures, such as printing composite bags length is shorter, can use puzzle method, namely a printed roll on two or more bags.
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