Analysis and research on quality defects of two-color moulded automotive interior parts based on IMD technology

In-mold decoration (IMD) technology is gaining increasingly interest in producing high-quality, reliable interior components within the automotive industry. This study synthesizes the primary factors influencing the quality of two-color IMD products and establishes their relative prioritization. Through an analysis of product requirements, key considerations for integrating two-color IMD in product design are delineated. Drawing on empirical practices and validation of outcomes, this paper elaborates the interdependencies and prioritization among product structure, adhesive inlet design, material selection for first color and second color components, film processing techniques, film thickness, and injection molding parameters. These factors are examined in relation to prevalent quality defects, including ink washout, weak adhesion between color layers, surface concavities, and indistinct textures. The findings offer valuable insights for optimizing the manufacturing process of two-color IMD products.