Precision Injection Molds for Automotive Lenses | Geqin Auto Parts

Our precision injection molds for automotive lenses represent the pinnacle of optical tooling technology. The molds are constructed from premium tool steels (P20, NAK80) with optical-grade cavity finishes (Ra <0.025μm). We incorporate advanced temperature control systems with multiple cooling zones to maintain ±0.5°C uniformity across the mold surface. The designs feature scientifically calculated runner systems that prevent flow lines in critical optical areas. Our molds utilize vacuum-assisted venting to eliminate gas traps that could cause burn marks or voids. The tooling includes precision alignment systems (DME standard) that maintain perfect shut-off over millions of cycles. We implement durable coatings (CrN, Ni-P-PTFE) on core components to extend tool life and facilitate part release. Our mold designs account for PMMA's specific shrinkage characteristics (0.2-0.8%) to achieve net-shape optical surfaces. The tools incorporate sensor systems for real-time monitoring of pressure and temperature parameters. We offer both conventional and hot-runner mold configurations depending on production volume requirements. All lens molds undergo thorough testing and process validation before production release. Our technical team can develop custom solutions for complex lens arrays or multi-material applications.