Corrugated cardboard box die-cutting indentation of the main process points (a)

Die-cut indentation is an indispensable process in corrugated carton processing. The appearance quality and market competitiveness of cardboard boxes that have been die-cut and indented have greatly improved. The main process of die-cutting indentation is: product designing → die-cutting tool processing → typesetting → loading, padding → die-cutting indentation → finishing → finished product.

1. product design

When designing corrugated cartons, it is necessary to accurately calculate the internal dimensions of the package. Rounded corners should be rounded as far as possible to prevent sharp corners. This is beneficial for row cutters; it avoids the connection of multiple adjacent narrow sides and facilitates the elimination of waste. After the specification of each part of the corrugated box is determined, the method of proofing is used to check, check the rationality of the specifications and the artistic appearance, and then formally make it.

2. Tool selection and processing

The die-cutting tools are called die-cutting knives, also known as steel knives, beer knives, etc.; the tools used for the indentation are called indentation lines, also known as steel lines, beer lines, and the like. Die cutters and indentation lines are manufactured by professional manufacturers. Users can select them according to their requirements. The common die cutter height is 23.8 mm and the thickness is 0.7 mm.

Corrugated box indentation line thickness d and height h: d ≥ c h = H-c c - corrugated board thickness H after compaction - die cutter height. The cutting edge of the die-cutting indentation tool must have a certain hardness. The knife must have a certain toughness and can be bent into any complex shape to meet the needs of the complex shape of the die-cut indentation product. The thicker the blade, the more difficult it is to bend; the higher the blade, the greater the force required for bending. For products with extremely precise shapes and complex shapes, thinner blades can bring a lot of convenience.

According to the requirements of the product, choose different hardness and shape of the tool, use a machete and other equipment to bend the tool into the desired shape. A well-designed bending machine die can prevent incorrect pressure on blade deformation. The blades should have a certain degree of bending plasticity. The blades can neither be spring-like nor deformed by a little pressure. Good plasticity should be a slight rebound after the blade is bent into a certain shape.

When inserting the insert into the grooved template, it should be tight and moderate. The blade can be embedded by gently tapping with a plate hammer. The thickness of the insert and the width of the kerf must be controlled within a certain tolerance. A beveled knife back makes it easy to insert the blade into the formwork. The blade cutting machine's mold should have a precise verticality, which guarantees that each cutting end obtained is perpendicular to the cutting edge. Roller die-cutting and creasing tools are divided into assembly type and integral type. The assembled die cutters and indentation lines are assembled on die-cut indentation rollers. The integral die-cutting cutters and indentation lines are integrated with the drum. Assembled die-cutting indentation rolling is easy to assemble and the product replacement is flexible: the integral die-cutting indentation roller is complicated to manufacture, and the entire drum needs to be replaced when the product is replaced, but in this way die-cutting indentation has high precision and high speed.

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