Printing slotting and printing line width after the inaccuracy of the causes and solutions
Date：
2022-09-23
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Size control is very important in the carton production process, no matter where it is. This means whether the size of the carton we make meets the customer's requirements, whether the customer is satisfied, and whether we will continue to work together in the future.
We think about it in a different way. If we were a customer and we wanted a carton for a laptop, it turned out to be the size of a TV carton. Would we be satisfied? Therefore, it is very important to control the size and never be sloppy.
So in the process of printing slotting and post crimping, what factors will lead to inaccurate size and how to avoid it?
1. Poor elasticity of the original paper, i.e., the original paper is loose and shrinks severely under heat, resulting in warping and deformation of the cardboard, which is also one of the causes of inaccurate size.
Excessive moisture or warping of the raw material and corrugated board is also a non-negligible cause of inaccurate dimensions. In general, the moisture in corrugated cardboard is basically around 10% to 14%, but if the moisture in corrugated cardboard is 14% to 18% or higher, it will be more humid.
If the cardboard is printed, slotted and die-cut directly after it comes off the line, the dimensions are more accurate. However, after a period of time, when the moisture dissipates and the moisture content is below 10%, the cardboard will shrink and the overall cardboard size will become smaller, with the size of each part varying. 1m length of cardboard will shrink by 4mm-6mm.
Therefore, it is important to master the moisture content of paper and cardboard. Measure the moisture content of each batch of cardboard with a rapid moisture meter and schedule printing, slotting and die-cutting according to the moisture. If the moisture content is too high, the cardboard should be left for 4 hours after it comes off the line and then dry naturally before the next production process. The general moisture content for delivery is 10% ± 2.
This is the reason why the general carton enterprises produce accurate size, but the size becomes smaller after being placed under natural conditions for some time.
2, the production size error or change orders when the wrong adjustment leads to inaccurate carton size, mainly caused by the operator carelessness. Careful inspection in normal production can avoid this problem.
The above is just a list of some of the more common factors, of course, there are many factors. For example, loose parts of the machine itself, abnormal operation or misalignment, etc., can cause dimensional changes.
control,satisfied,future
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