Traditionally, a car window’s main function is to shield occupants from wind and rain. Today, however, modern automotive windows have evolved to incorporate multiple convenience and safety features. High-end vehicles often feature acoustic glass, which uses multi-layer structures with sound-dampening films to effectively block wind and road noise, allowing passengers to enjoy a quiet cabin even at high speeds. Meanwhile, tempered glass undergoes specialized manufacturing processes to ensure that, upon impact, it shatters into small, uniform pieces, reducing the risk of injury and complying with the latest safety regulations. This integration of precision engineering relies heavily on CNC (Computer Numerical Control) machinery. From maintaining uniform glass thickness and precise curvature to ensuring perfect adhesion between layers, even the slightest deviation can compromise noise insulation, thermal performance, and safety. Automakers therefore demand exceptionally high-quality standards from window manufacturers, as these components directly impact brand image and, more importantly, driver and passenger safety.