Process upgrade and full process quality control system for PP tire bead separators
The performance stability and adaptation accuracy of the Bead Spacer depend on mature production processes and strict quality control. With the increasing demand for standardization and refinement of accessories in the tire industry, the production process of tire pads continues to iterate, and through a full process quality control system, products are ensured to meet the stringent requirements of different scenarios.
In terms of upgrading the molding process, mainstream manufacturers have adopted an integrated production line of "dual-mode co extrusion+precision cutting". The melting temperature of the substrate of the bead separator is strictly controlled at 180-210 ℃. When adding modification agents (such as reinforced glass fibers and UV resistant agents), precise measurement is carried out through the side feeding system, and the addition error does not exceed ± 0.1%. For products of different thicknesses, the mold gap can be fine tuned by 0.1mm, and the thickness range of 1.0-15.0mm can be molded in one go, resulting in a 40% increase in production efficiency compared to traditional single-mode processes. Taking the 1.3mm thick PP tire bead separator for passenger cars as an example, the dual-mode co extrusion process controls the thickness tolerance of the product within ± 0.05mm, and the surface flatness error is ≤ 0.2mm/m, far exceeding the industry standard requirement of ± 0.1mm.
The optimization of surface treatment process further enhances the practicality of the product. The anti slip Apex Holder adopts a composite process of "laser etching+roll sanding", forming a uniformly distributed micrometer level anti slip texture on the surface, with a texture depth of 0.08-0.12mm and a surface roughness Ra of 1.0-1.5 μ m. Compared with a single sanding process, the anti slip performance is improved by 35%. In environments ranging from -18 ℃ to 60 ℃, the friction coefficient fluctuation does not exceed 0.03. For production scenarios that require anti-static measures, PP bead separators are modified with carbon nanotubes, resulting in a stable surface resistance value of 10 ⁸ -10 ¹⁰ Ω. This allows for rapid release of static electricity, preventing dust adsorption from affecting tire assembly accuracy. The static decay time is ≤ 0.5 seconds.
The whole process quality control covers every link from raw materials to finished products. Before the raw materials are put into storage, they need to pass 12 indicators such as density testing (with an error of ≤± 0.02g/cm ³) and melt flow rate testing (with numerical fluctuations of ≤± 0.2g/10min under 230 ℃/2.16kg conditions). During the production process, product thickness and dimensional accuracy are sampled and tested every hour. Fully automatic visual inspection equipment is used to detect surface scratches, bubbles, and other defects, with a detection accuracy of 0.01mm and a defect recognition rate of 100%. Before leaving the factory, key items such as tensile strength testing (≥ 28MPa), bending fatigue testing (1000 times without cracks), and weather resistance testing (after 80 ℃/1000 hours of thermal aging, the retention rate of tensile strength is ≥ 85%) need to be completed. According to data from a leading manufacturer, through this quality control system, the finished product qualification rate of PP bead separators has remained stable at 99.9%. The occurrence rate of customer feedback on size discrepancies and performance non-compliance is less than 0.1%, providing a highly reliable accessory solution for the tire industry.
Changshu Yongchengsheng Hardware Products Co., Ltd. specializes in the production and sales of tire bead separators and PP tire bead pads. If you need them, please contact us at+86-13506249539; Contact email: ljd706627@gmail.com
