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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