PMMA Injection Molds for Automotive Lighting | Precision & Efficiency

Our PMMA injection molds for lighting applications are specifically designed to handle the unique characteristics of polymethyl methacrylate. The molds feature large, carefully positioned gates to ensure smooth material flow and prevent jetting in transparent components. We implement precise temperature control systems (60-80°C typically) to achieve optimal surface finish and minimize internal stresses. The molds incorporate specialized venting designs that prevent burn marks while maintaining optical clarity. Our PMMA molds utilize hardened tool steels with ultra-smooth cavity finishes (Ra<0.05μm) to produce parts with 92%+ light transmission. The designs account for PMMA's relatively high shrinkage (0.2-0.8%) to achieve dimensional accuracy in final parts. We offer mold configurations optimized for both thick-section lenses and thin light guides. The molds include robust ejection systems that prevent marking on optical surfaces. Our process engineers have developed specialized packing profiles that minimize birefringence in PMMA optical components. All lighting molds undergo photometric testing of sample parts to verify optical performance meets specifications. We can integrate optical correction features directly into the mold design to compensate for light refraction characteristics.