Purchase Without Pitfalls - Quality Identification and Pit-Avoidance Guide for Knife Plate Spring Pads and Indentation Strips
The procurement process of the ejection rubber and the indentation strip is the "first checkpoint" that determines the stability of production. The quality of accessories in the market varies greatly. Some inferior products use low prices as a selling point, but in fact, they have problems such as poor resilience, insufficient wear resistance, and dimensional deviations. This not only leads to a decline in product qualification rates but may also damage die-cutting equipment, causing even greater losses. Mastering scientific quality identification methods and avoiding procurement traps are important prerequisites for enterprises to control costs and ensure production.
The quality identification of knife plate spring pads can be approached from three dimensions: "observation, touch and measurement". "Look" at the appearance - High-quality elastic pads have a smooth and flat surface, free of bubbles, cracks, impurities and other defects, and the color is uniform and consistent. However, the surface of inferior elastic pads is rough, often showing unevenness or uneven color, and some even have obvious production defects visible. "Touch" texture - Press the elastic pad with your hand. High-quality elastic pads have good resilience, can quickly return to their original shape after being pressed, and have a fine and resilient touch. Poor-quality elastic pads have poor resilience, recover slowly after being pressed, and some are either stiff in texture or overly soft, with a rough touch. "Test" performance - When conditions permit, a simple test can be conducted. Use a caliper to measure the thickness and width of the spring pad. The dimensional deviation of high-quality spring pads should be controlled within ±0.1mm. Stretch the spring pad repeatedly for 10 times. High-quality spring pads will not break or permanently deform, while low-quality spring pads may develop cracks during the stretching process.
The core of quality identification for creasing matrix lies in "dimensional accuracy" and "material stability". When identifying the dimensional accuracy, a professional caliper should be used to measure the height, width and length of the indentation strip. The dimensional deviation of high-quality indentation strips in each dimension does not exceed ±0.05mm, and the size of the entire indentation strip is uniform without any local uneven thickness. Poor-quality indentation strips have significant dimensional deviations and often experience height fluctuations, which directly affect the indentation effect. When identifying the stability of the material, the indentation strip can be soaked in warm water at 70℃ for 30 minutes. High-quality creasing matrix will not deform or soften after being taken out, and the material performance is stable. Poor-quality indentation strips may experience swelling, deformation or surface peeling. In addition, the quality can also be judged by observing the cut of the indentation strip. High-quality indentation strips have smooth and flat cuts without burrs. Poor-quality creasing strips have rough cuts and are prone to burrs, which may scratch the paper during use.
During the procurement process, it is also necessary to avoid three common traps: The first is "low-price temptation". Some suppliers sell products at prices far lower than the market average, but in fact, they are made with inferior raw materials. The service life of such products is only one-third of that of high-quality products, which instead increases long-term costs. The second is "parameter fraud". Some suppliers falsely report parameters such as hardness and resilience in product descriptions. When purchasing, it is necessary to request a third-party test report to avoid being misled by false data. The third type is "passing off inferior goods as good ones", where accessories made from recycled materials are sold as new material products. Such products have unstable performance. When purchasing, one can identify them by checking the material inspection report or asking for samples for testing. To ensure the quality of the knife plate spring pad and indentation strip from the source, it is necessary to choose a supplier with a good reputation and complete qualifications, and establish a perfect inbound inspection process.