The "invisible skeleton" of packaging forming - the fundamental mission of the creasing line

In the production process of paper packaging such as cartons and gift boxes, the creasing line is the "invisible skeleton" that determines the forming effect. This kind of strip-shaped component mainly made of metal or resin is pressed with evenly deep grooves on the surface of the paper material by die-cutting equipment, providing precise guidance for the folding of the material. Unlike simple creases, the creases formed by the crease lines have the characteristics of strong stability and not easy to rebound, which can ensure that the packaging maintains a regular shape after folding and avoid problems such as lifted corners and shifted creases.

The core value of the indentation line lies in "precise control". Its width, thickness and indentation depth need to be precisely matched according to the paper weight - for thick corrugated paper, high-strength metal indentation lines should be selected to press deeper grooves to reduce folding resistance; For thin coated paper, resin creasing lines can prevent paper damage while leaving fine creases. In the production of express delivery cartons, standardized creasing lines ensure that the seams of the cartons are tight after folding, enhancing the load-bearing capacity and protective performance of the packaging. In the manufacturing of food gift boxes, the fine indentation ensures smooth opening and closing of the gift boxes, guaranteeing the sealing of the packaging. What seems like a simple line is actually the key bridge for packaging to move from the two-dimensional to the three-dimensional.