Second, the cause of the cracks
We conducted an in-depth investigation and analysis on the causes of the cracks in the frame. The following is our analysis:
1. The quality of the rough frame is qualified. First of all, it should be clear that the quality of the rough frame is fully in line with the standards at the rough stage. The finished product at this stage has undergone strict quality inspection to ensure the stability and safety of its basic structure.
2. Problems in the custom painting process
However, in the subsequent custom painting process, the key problem that caused the cracks appeared. In order to make the painting uniform and beautiful, the workers need to use sandpaper to manually polish the rough frame so that the paint has better adhesion. In this process, the processing workers of this frame may have overexerted when polishing around the holes, resulting in the destruction of strength.
3. In the quality inspection link after the painting, these weak parts have been covered by paint and the surface has restored thickness, resulting in these weaknesses not being discovered in time.
In summary, the appearance of cracks is mainly due to the excessive polishing force of workers during the custom painting process, which leads to the thinning of carbon yarn around the holes and is covered up in the subsequent quality inspection. We will strengthen training and management on this issue and add a quality inspection after the frame is sanded and before it is painted to ensure that similar problems do not occur again.
