The usage norms and maintenance points of the knife plate spring pad

The usage effect and service life of the knife plate spring pad not only depend on the performance parameters of the product itself, but are also directly related to the matching installation method, usage environment and maintenance measures. Scientific use and maintenance can extend the service life of the elastic pad by more than 40%, while reducing the defect rate of die-cutting and lowering production costs.

The core of the usage norms lies in "precise matching" and "correct installation". In the matching stage, the parameters of the spring pad should be determined based on the thickness of the base material, the type of knife plate and the die-cutting speed: for thick base materials (such as corrugated paper), high elasticity and medium hardness spring pads should be preferred; for thin base materials (such as labels), low hardness and high recovery rate spring pads should be preferred. The flatbed die-cutting machine is compatible with rectangular cross-section spring pads, while the rotary die-cutting machine is compatible with arc-shaped cross-section spring pads. When installing, it is necessary to pay attention to controlling the distance between the spring pad and the knife plate within 0.5-1mm to avoid excessive compression of the spring pad due to a too small distance or loss of buffering effect due to a too large distance. At the same time, it is necessary to ensure that the spring pad is installed flat, without distortion or overlap; otherwise, due to uneven force, local wear of the spring pad or deviation of the knife plate may occur. In addition, during use, the die-cutting pressure should be controlled within the rated bearing range of the elastic pad. For instance, the single compression amount of the polyurethane elastic pad should not exceed 30% of its own thickness to prevent permanent deformation.

Daily maintenance should be carried out around three dimensions: "cleaning, inspection and storage". In terms of cleaning, after each die-cutting operation, wipe the paper scraps and ink on the surface of the elastic pad with a dry soft cloth. If it is stained with oil, gently wipe it with a neutral cleaner to avoid chemical reagents corroding the material. For precision spring pads, it is necessary to regularly clean the tiny impurities on the surface of the spring pads with compressed air to prevent affecting the flatness. In terms of inspection, it is necessary to focus on checking the spring pad every week for problems such as cracks, bulges, and elasticity loss. If the recovery time of the spring pad after compression exceeds 3 seconds, or if there is wear on the surface with a depth exceeding 0.5mm, it should be replaced in a timely manner. In terms of storage, idle spring pads should be placed in a cool and dry environment, avoiding direct sunlight, high temperatures (above 60℃), or damp conditions (relative humidity over 80%) to prevent material aging. Elastic pads of different materials should be stored separately to avoid contact with oil and solvent substances. Natural rubber elastic pads and polyurethane elastic pads should not be stacked. They can be hung or laid flat to prevent deformation under pressure.