汽车涂装PVC密封胶开裂问题的分析与防治

Analysis and Prevention of Cracking of Automotive Sealing PVC Sealant

在汽车涂装生产作业过程中,车身焊缝密封主要分为车身焊缝密封和扁胶密封,焊缝密封可应用于白车身各部位搭接、包边而产生的焊缝的密封,扁胶密封主要应用与四门两盖包边产生的焊缝搭接密封,扁胶密封相较焊缝密封还具有装饰性能。然而在汽车生产过程中,PVC密封胶的开裂不仅影响了汽车的装饰性能,更降低了车身密封性、降噪隔热性及耐腐蚀性能,需要在涂装作业过程中进行控制、防治。

In the process of automobile painting production, the body weld seal is mainly divided into body weld seal and flatrubber seal. The weld seal can be applied to the sealing of weld seams caused by overlapping and wrapping of white bodyparts, flat rubber. The main application of the seal is lap joint sealing with the weld produced by the four-door and two-coveredging. The flat rubber seal has decorative properties compared to the weld seal. However, in the automobile productionprocess, the cracking of the PVC sealant not only affects the decorative performance of the automobile, but also reduces thebody sealability, noise reduction and heat insulation resistance, and needs to be controlled and controlled during the paintingoperation.