Shenhua Printing Material Knife Plate Spring Pad: A Synergistic Optimization Strategy for Die-cutting Knife Grinding Process

The grinding process of the die-cutting knife directly affects the sharpness and service life of the knife body. The elastic pad of the die plate, as a supporting consumable of the knife, its performance and compatibility with the grinding parameters will indirectly affect the die-cutting effect and the wear rate of the knife. There is a common misunderstanding in the industry that "grinding is emphasized while the matching of the elastic pad is neglected", which leads to a shortened service life of the knife after grinding and fluctuations in die-cutting accuracy. Deephua Printing Materials, based on the collaborative mechanism of the die-cutting knife and the elastic pad, has launched an optimized strategy for the elastic pad that matches the grinding process, achieving "cooperative knife and pad, efficiency doubled".

For different grinding accuracy, Deephua Printing Materials matches differentiated elastic pad parameters. For high-precision grinding (blade sharpness ≤ 0.01mm, suitable for high-end die-cutting scenarios), a high-precision elastic pad is used, with a thickness error controlled within ±0.03mm, and the surface is processed by precise cutting technology to ensure the adhesion between the elastic pad and the sharp blade, avoiding blade chipping due to uneven force; for regular grinding (blade sharpness ≤ 0.05mm, suitable for common die-cutting scenarios), a general-level elastic pad is selected, the rebound curve is optimized, and the die-cutting efficiency and knife protection are balanced; for rough grinding (blade sharpness ≤ 0.1mm, suitable for thick material die-cutting scenarios), a high-hardness elastic pad is paired, through strong rebound to buffer the impact force of the blunt blade, reducing knife wear, while ensuring thorough die-cutting of thick materials.

During the debugging stage after grinding, Deephua Printing Materials provides specialized matching guidance. After grinding, the height and angle of the knife edge will change. The technical team will adjust the thickness, attachment position and die-cutting pressure of the elastic pad according to the new knife parameters to ensure the rapid adaptation of the elastic pad to the new ground knife, shortening the debugging time. At the same time, it is recommended that customers plan the knife grinding cycle synchronously with the lifespan of the elastic pad - when the elasticity of the elastic pad declines to the critical value, synchronously grind and replace the elastic pad to avoid imbalance in adaptation caused by a single replacement. After applying this collaborative strategy in a certain paper box factory, the service life of the die-cutting knife was extended by 25%, the frequency of grinding was reduced by 30%, the stability of die-cutting accuracy was improved by 40%, and the comprehensive production cost was significantly reduced.