汽车仪表盘黑色塑料激光透射焊接研究

目的 研究汽车仪表盘黑色塑料的焊接方法,提高焊缝强度,满足实际生产.方法 在热塑性聚氨酯塑料的注塑过程中,加入一定比例的黑色有机染料,分析添加不同质量分数的黑色有机染料对透光率的影响.采用激光作为加热热源对黑色热塑性聚氨酯塑料进行焊接.结果 当添加的黑色有机染料质量分数为10％时,得到焊缝表面无痕迹,焊缝强度为131 ...

Research on Laser Transmission Welding of Black Car Dashboards Thermoplastic Polyurethane Plastic

The welding method of black plastic in automobile instrument panel was studied to improve the weld strength and meet the practical production. A certain amount of black organic dye was added into thermoplastic polyurethane plastic, and the transmittance for adding different ratio of black organic dye into the polyurethane was analyzed. Laser was used as heating source for the welding experiment of black thermoplastic polyurethane plastic. When the adding ratio of black organic dye was (wt) 10%, the appearance of welds was no trace and the shearing strength was 131 MPa. As the adding ratio of black organic dye increased, the transmittance for visible light basically had no changed, but the transmittance for near infrared band of 915 nm increased gradually. When the depth and width of the welds were large and had no pores in it, the shear strength of the weld reached to the maximum. By adding black organic dye into black plastic, the laser transmission welding of automobile instrument panel was realized, which met the requirements of practical production.