The main reasons for cracking at the indentation in the carton die cutting are:
First, the indentation line model is not properly selected, the paper is fractured during the die cutting process.
Reasonable selection of high-quality indentation lines is a prerequisite for good indentation during die-cutting.
1. Firstly, the arc part of the indentation line can't deviate from the center, otherwise it will produce unilateral indentation;
2. It is required that the height tolerance of the indentation line be within ±00.020mm.
3, the height of the indentation line According to the different thickness of the indented paper, select the indentation line of different height dimensions. Indentation line height = Height of die cutter - Corrugated paper flattening thickness - 0.1 mm (Indentation bottom film thickness)
4. The thickness of the selected indentation line must be greater than the thickness of the corrugated paper after flattening. For example, when the thickness of the corrugated paper after flattening is 0.8 mm, an indentation line with a thickness of 1.05 mm or 1.42 mm is required when the indentation line is selected.
Second, the indentation of the bottom mold thickness and groove width is not suitable, resulting in cracks in the indentation process.
According to the size of the die-cut corrugated paper and the selection of the indentation line size, selecting the appropriate indentation mold to make a reasonable indentation bottom mold is a necessary condition for obtaining a good indentation effect.
1. Select the thickness of the indentation mold to be equal to or less than the thickness of the corrugated paper after flattening.
2, indentation mold groove width = corrugated paper thickness after flattening '2.0 + selected indentation line thickness.
3, the thickness of the corrugated paper after the flattening is 1.04mm, the thickness of the indentation line is 1.05mm, according to the calculation method, 1.0mm 1.04mm can choose the thickness of the indentation mold is 1.0mm, the width of the indentation mold groove = 1.04mm 2.0 +1.05 Mm = 3.13mm 3.2mm, and finally calculated according to the calculation should use thickness 1.0mm, groove width 3.2mm indentation die.
--Carton Technology
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