Which type of creasing line should be selected for the rotary die-cutting process?
In the field of packaging printing, the rotary die-cutting process, due to its continuous operation characteristic, has become the preferred solution for mass production. Compared with flatbed die-cutting, this technology can increase production efficiency by more than 40%, and the key factor determining the process effect is precisely the selection of the creasing line.
Special requirements for the indentation line in the rotary die-cutting process
During the rotary die-cutting process, two rollers rotate relatively to complete the die-cutting operation, and the linear speed is usually maintained at 100 to 150 meters per minute. This working mode requires that the indentation line must meet the conditions of continuous operation.
The linear creasing line used in ordinary flatbed die-cutting is difficult to adapt to the operating environment of the rotary die-cutting process. During high-speed continuous operation, conventional creasing lines are prone to accelerated wear and inconsistent creasing effects. In severe cases, they may become loose or fall off, leading to equipment shutdown.
Technical characteristics of circular indentation lines
In terms of material, the indentation line suitable for the round-to-round process is made of hard alloy material, which has a wear resistance 5 to 8 times higher than that of ordinary steel. It can still maintain a stable indentation effect during long-term continuous use.
In terms of structural design, this type of creasing line adopts an arc-shaped structure, with the curvature of the arc consistent with that of the die-cutting roller, ensuring stability during high-speed operation of the equipment and avoiding the impact on creasing quality due to vibration.
In terms of process adaptability, the round-pressed round creasing line offers a variety of tooth profile configurations, including standard tooth profiles, arc tooth profiles, and asymmetrical tooth profiles, which can meet the processing requirements of different materials such as corrugated cardboard and cardboard.
The product solutions of Shenhua Printing Materials
Based on over two decades of industry practical experience, Shenhua Printing Equipment Technology Co., Ltd. has developed a series of creasing line products specifically for the rotary die-cutting process. These products draw on the creasing line technology of German Xitu and have been adaptively improved in combination with the actual production conditions in China.
The hard alloy creasing lines of Shenhua Printing Materials, when used in conjunction with rotary die-cut grooved sponge, form a complete die-cutting solution. In a cooperation case with a certain group, the super-hard alloy reverse pressing line provided by Shenhua Printing Materials helped the client increase the matching degree of electronic product packaging and assembly by 25%, and the product return rate was controlled.
Key points for selecting indentation lines
When choosing the indentation line for the rotary die-cutting process, the following factors need to be comprehensively considered:
Material properties are the primary consideration factor. Corrugated cardboard of different thicknesses and types (such as E-flute, B-flute) and cardstock (such as 350g-450g) require creasing lines of different heights and widths.
The precision requirements of the product directly affect the selection criteria for the indentation line. For fields with strict requirements such as electronic product packaging, it is recommended to choose indentation lines made of hard alloy. For ordinary transport packaging, standard creasing lines can be selected.
Equipment parameters also need to be paid attention to. Die-cutting rollers of different diameters need to be equipped with indentation lines of corresponding arcs to ensure complete adhesion.
The technical team of Shenhua Printing Materials has summarized a set of selection methods: based on the model of the die-cutting machine, the diameter of the roller and the characteristics of the production material, it recommends suitable creasing line tooth profiles and matching bottom die lines.
Contact information for Shenhua Printing Materials: Mr. Ji, 19924506937