In the highly competitive automotive manufacturing sector, "cost control" and "sustainable development" are pivotal for gaining market leadership. As the trend of vehicle lightweighting accelerates, the use of plastic components continues to rise—from interior parts (dashboards, door panels) to exterior parts (bumpers, grilles), and functional components (under-hood parts, fuel tanks). This prevalence unveils a significant opportunity for cost optimization and environmental benefits: the recycling and reuse of sprues, rejects, and post-consumer scrap.