How to deal with surface defects of carbon fiber products?

The appearance of carbon fiber is usually smooth, and few people may see rough parts. Carbon fiber may have defects such as white spots, bubbles, pores, and pits on the surface after molding, which requires a series of treatments before delivery.

What are the causes of surface defects of carbon fiber products?
Carbon fiber products are mainly customized processing, involving a wide variety of molds, most of which use molding technology. During the processing stage, defects such as white spots, air bubbles, pores and pits may appear.

The specific reasons are as follows:
1. Vacuum leakage: vacuum bag is damaged, sealing tape is not in place, mold sealing is poor, etc.;
2. Incomplete penetration: The resin gel time is too short, the viscosity is too high, the carbon fiber precursor is too thick, the resin content is too small, the resin overflows too much, etc., resulting in insufficient carbon penetration into the fiber;
3. Operation error: In the process of processing, the heating is too fast, the pressure is too fast, the pressure is too early, the holding time is too short, the temperature is too high, and the operation problem leads to insufficient molding of carbon fiber products.

Do surface defects affect the use of carbon fiber products?
Excessive surface defects of carbon fiber products are not necessarily proportional to the quality, but carbon fiber products are usually used in high-end manufacturing industries, which have high requirements for performance and appearance, and excessive defects will affect normal delivery. In addition, many defects, many pores, and many cracks will affect the performance of carbon fiber products. Carbon fiber porosity has a technical term used to summarize the penetration effect of carbon fiber products. If the porosity is too high, the resin content exceeds the standard or the distribution is uneven. In actual production, the operation must be standardized to avoid this situation.

How to deal with surface defects of carbon fiber products?
Surface defects of carbon fiber products are a common phenomenon. Most of them can be machined and repaired. As long as the production process is normal, the yield of good products will not be too low.
Defective carbon fiber products can be polished, cleaned and painted without compromising performance to eliminate defects and maintain a clean appearance. The technological process includes water grinding, primer coating, middle coating, top coating, grinding and polishing, and repeated spraying and polishing to ensure that the appearance of carbon fiber meets the delivery standard.