Analysis of the problem of unclear indentation lines in die-cutting machines by Haocheng Machinery: There are generally two situations where the indentation lines are unclear. One is called a dark line, which refers to unnecessary indentation lines; And another type is called explosive line, mainly because the pressure of the die-cutting indentation is too large, exceeding the range of pressure the material can withstand, causing the product to fracture. And what causes this phenomenon. The main reason is that the pressure of the die-cutting machine is not accurate enough, so the pressure regulating part of the die-cutting machine should be adjusted appropriately to ensure that the pressure reaches the appropriate standard. The selection of indentation line and indentation mold is not ideal, so the correct indentation model number and indentation line height should be selected. When selecting die-cutting materials, the depth of the indentation die should be the same as the thickness of the die-cutting material; The width is 1.5 times the thickness of the paper plus the thickness of the indentation line; Ensure that the height of the indentation line is the same as the height of the die cutting knife.