关键词: 空腔发泡；空腔阻断；NVH 性能；双组份聚氨酯

Abstract: This paper focuses on the application of cavity barrier technology in improving noise, vibration and harshness (NVH) performance, and compares the performance and application scenarios of prefabricated foam modules and two-component polyurethane foams. Through a detailed discussion of the process debugging, mixing ratio, pressure, temperature control and injection weight of the two-component polyurethane foam, the optimization and application of the material in practical production are demonstrated. The two-component polyurethane foam can significantly reduce the interior noise and improve the NVH performance under both acceleration and constant speed. Finally, the paper summarizes the advantages of cavity foaming process compared with traditional methods in many aspects, compares the advantages of cavity foaming compared with prefabricated foaming modules in several aspects, and looks forward to its wide application prospects in the automotive industry.

Key words: cavity foaming; cavity occlusion; NVH performance; two-component polyurethane