Precision Mold Air Filter Manufacturing & Micro-Nano Mold Surface Treatment Process

The dimensional accuracy of air filter finished products depends entirely on the precision level of production molds. High-quality auto filter factories adopt ultra-precision mold processing technology including electrical discharge machining and ultra-precision grinding, with the mold tolerance controlled within micron level and surface roughness strictly below 0.1 microns. This high-standard mold manufacturing ensures that every PU frame, rubber sealing structure and special-shaped filter outline fully complies with OEM original vehicle data.

Different from ordinary rough molds, our factory’s filter molds undergo micro-nano coating treatment on the surface. The advanced wear-resistant and anti-sticking coating enhances mold surface smoothness, effectively solving the problems of glue adhesion, burr generation and uneven product surface in traditional molding processes. The optimized mold structure realizes one-time integral forming without secondary trimming, greatly improving product forming yield and surface finish.

In addition, all molds are equipped with temperature sensing and pressure balancing systems. During PU foaming and rubber vulcanization, the internal pressure and temperature of the mold cavity are uniformly distributed, avoiding local shrinkage, deformation and sealing gap defects caused by uneven stress. Regular mold calibration and maintenance ensure consistent dimensional accuracy of mass-produced products, realizing 100% perfect fitting for after-market vehicle installation and eliminating air leakage risks caused by dimensional deviation.