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How to avoid unclear indentation lines, dark lines, explosive lines, and other phenomena during die cutting?
2023/3/9
Six troubleshooting methods for die-cutting and indentation processing:
(1) The cutting edge of the die cutting is not smooth. The reason for the occurrence is poor quality of the steel knife, the blade is not sharp, and the die-cutting suitability is poor; The steel blade edge is severely worn and not replaced in a timely manner; Insufficient machine pressure; When adjusting the pressure of die-cutting, the paper padding at the steel knife is not handled properly, resulting in discomfort in the pressure during die-cutting. The elimination method is to select steel knives with different quality characteristics based on the different properties of die-cutting cardboard to improve its die-cutting suitability; Regularly check the blade and wear of the steel knife, and replace it with a new one in a timely manner; Increase the die-cutting pressure of the die-cutting machine appropriately; Readjust the steel knife pressure and replace the pad paper.
(2) Cardboard adhesive blade after die-cutting. The reason is that the rubber around the blade is too thin, causing insufficient rebound force, or the selection of rubber with hard, medium, or soft properties is not appropriate; The edge of the steel knife is not sharp, and the thickness of the paper is too large, causing excessive pressure during clamping or die-cutting. Rubber with different hardness can be reasonably selected based on the distribution of steel knives in the template, and attention should be paid to the appropriate density and distribution when sticking the plug; Adjust the die-cutting pressure appropriately, and replace the steel knife if necessary.
(3) The position of the die-cutting indentation is not accurate. The reason for the malfunction is that the position does not match the printed product; The grid positions of die-cutting and printing are not aligned; The cardboard mouth has different rules; Inconsistent paper feeding position during die cutting operation; During operation, the cardboard is deformed or stretched, resulting in inaccurate overprinting. The solution is to recalibrate the template according to product requirements, align the printing and die-cutting grids; Adjust the positioning rules of die-cutting paper feeding to ensure consistent paper feeding positions; Reduce the impact of printing and material defects on the quality of die-cutting by addressing the causes of faults.
(4) Unclear indentation with dark lines and explosive lines. Dark lines refer to unnecessary indentation, while burst lines refer to cardboard breakage due to excessive indentation pressure. The reason for the malfunction is that the thickness calculation of the copper wire pad paper is inaccurate, and the pad paper is too low or too high; Improper selection of copper wire; The pressure adjustment of the molding machine is improper, too large or too small; The paper is too poor, and the water content of the paper is too low, which increases its brittleness and reduces its toughness. The thickness of steel wire Paper Cuttings shall be recalculated and adjusted; Check if the copper wire selection is appropriate; Adjust the pressure of the die-cutting machine appropriately; Adjust the die-cutting and indentation process conditions according to the condition of the molded cardboard to make the two as suitable as possible.
(5) Indentation line wood rules. The reason is that the indentation groove on the copper wire pad paper is left too wide, and the position of the cardboard indentation is uncertain; The thickness of the copper wire pad paper is insufficient, the groove angle is not standardized, excess rounded corners appear, the tightness of the blade arrangement and fixing is not appropriate, the copper coin is too tight, and the bottom cannot achieve an ideal connection with the flat surface of the pressure plate, which is prone to twisting during indentation; The copper wire is too loose and can easily move left and right during indentation. The elimination method is to replace the copper wire pad paper, leaving a narrow margin for the extrusion marks; Increase the thickness of steel wire pad paper and trim the groove corners; When arranging and fixing the knives, the tightness should be appropriate.
(6) When folding into shape, the cardboard cracks at the creases. When folding, if the outer side of the cardboard indentation cracks, the reason is that the indentation is too deep or the indentation width is not enough; If the inner side of the cardboard cracks, it is due to excessive molding pressure and deep folding. The thickness of steel wire Paper Cuttings can be appropriately reduced; Widen the indentation line according to the thickness of the cardboard; Reduce the pressure of the floor cutting machine appropriately; Or switch to copper wire with a slightly lower height.
(1) The cutting edge of the die cutting is not smooth. The reason for the occurrence is poor quality of the steel knife, the blade is not sharp, and the die-cutting suitability is poor; The steel blade edge is severely worn and not replaced in a timely manner; Insufficient machine pressure; When adjusting the pressure of die-cutting, the paper padding at the steel knife is not handled properly, resulting in discomfort in the pressure during die-cutting. The elimination method is to select steel knives with different quality characteristics based on the different properties of die-cutting cardboard to improve its die-cutting suitability; Regularly check the blade and wear of the steel knife, and replace it with a new one in a timely manner; Increase the die-cutting pressure of the die-cutting machine appropriately; Readjust the steel knife pressure and replace the pad paper.
(2) Cardboard adhesive blade after die-cutting. The reason is that the rubber around the blade is too thin, causing insufficient rebound force, or the selection of rubber with hard, medium, or soft properties is not appropriate; The edge of the steel knife is not sharp, and the thickness of the paper is too large, causing excessive pressure during clamping or die-cutting. Rubber with different hardness can be reasonably selected based on the distribution of steel knives in the template, and attention should be paid to the appropriate density and distribution when sticking the plug; Adjust the die-cutting pressure appropriately, and replace the steel knife if necessary.
(3) The position of the die-cutting indentation is not accurate. The reason for the malfunction is that the position does not match the printed product; The grid positions of die-cutting and printing are not aligned; The cardboard mouth has different rules; Inconsistent paper feeding position during die cutting operation; During operation, the cardboard is deformed or stretched, resulting in inaccurate overprinting. The solution is to recalibrate the template according to product requirements, align the printing and die-cutting grids; Adjust the positioning rules of die-cutting paper feeding to ensure consistent paper feeding positions; Reduce the impact of printing and material defects on the quality of die-cutting by addressing the causes of faults.
(4) Unclear indentation with dark lines and explosive lines. Dark lines refer to unnecessary indentation, while burst lines refer to cardboard breakage due to excessive indentation pressure. The reason for the malfunction is that the thickness calculation of the copper wire pad paper is inaccurate, and the pad paper is too low or too high; Improper selection of copper wire; The pressure adjustment of the molding machine is improper, too large or too small; The paper is too poor, and the water content of the paper is too low, which increases its brittleness and reduces its toughness. The thickness of steel wire Paper Cuttings shall be recalculated and adjusted; Check if the copper wire selection is appropriate; Adjust the pressure of the die-cutting machine appropriately; Adjust the die-cutting and indentation process conditions according to the condition of the molded cardboard to make the two as suitable as possible.
(5) Indentation line wood rules. The reason is that the indentation groove on the copper wire pad paper is left too wide, and the position of the cardboard indentation is uncertain; The thickness of the copper wire pad paper is insufficient, the groove angle is not standardized, excess rounded corners appear, the tightness of the blade arrangement and fixing is not appropriate, the copper coin is too tight, and the bottom cannot achieve an ideal connection with the flat surface of the pressure plate, which is prone to twisting during indentation; The copper wire is too loose and can easily move left and right during indentation. The elimination method is to replace the copper wire pad paper, leaving a narrow margin for the extrusion marks; Increase the thickness of steel wire pad paper and trim the groove corners; When arranging and fixing the knives, the tightness should be appropriate.
(6) When folding into shape, the cardboard cracks at the creases. When folding, if the outer side of the cardboard indentation cracks, the reason is that the indentation is too deep or the indentation width is not enough; If the inner side of the cardboard cracks, it is due to excessive molding pressure and deep folding. The thickness of steel wire Paper Cuttings can be appropriately reduced; Widen the indentation line according to the thickness of the cardboard; Reduce the pressure of the floor cutting machine appropriately; Or switch to copper wire with a slightly lower height.
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