Whether you are using hand paste or vacuum, it is inevitable that there are holes on the surface of carbon fiber parts when you are engaged in carbon fiber products processing. No part is perfect, there are many reasons for bubbles, and it is difficult to completely eliminate them. Let's briefly talk about how to deal with defective carbon fiber parts.
The processing steps are as follows: water grinding + primer coating - intermediate coating - surface coating. 1、 After sandpaper water grinding carbon fiber product surface voids, cleaning and drying treatment In the white spot, 240 water sanding paper can not see any trace. The reason why dry grinding is not recommended is that the dust is easy to enter into the hole, and it is very difficult to clean up. It still looks white. Some people worry that constant polishing will wear the carbon fiber and affect its appearance. Of course, this is only a partial frosting effect, but the pores will not be too big, and it will be more ugly. You should know more about fish and bear paw, which is more important. The undeliverable goods are just waste products. Condition after water grinding treatment Another advantage of grinding is that it can remove the residual adhesion of the release agent, increase the post coating, clean the dust and dry. dry The blackening part is the slight polishing of the carbon fiber cloth, which has little effect on the appearance of the later stage, so there is no need to deliberately pursue perfection.
stoma The white spots before grinding are enlarged to avoid many small holes. The reason for polishing is that the film needs to fill the part lacking glue, and the appearance should be full and pleasing to the eye. 2、 Shotcrete primer 10-15 μ m The main purpose of spraying primer is to increase adhesion, and the subsequent spraying can be carried out directly after spraying. Some people say that direct spray painting is OK, but I'm too lazy to explain. In a word, yes, it doesn't mean good. 3、 50-100 μ Three coating methods of M (dry film) It's hard to enter glue if there are micropores Sometimes the micropores are not sealed, and can be sprayed many times every 15 minutes until there are micropores at the sealing place. Special position air hole, can cooperate with brush to assist press in. 4、 20-30 μ Painting treatment of dry film Painting technology It is recommended to spray varnish twice. As can be seen from the figure, the front micropores are completely closed, and the carbon fiber texture is also very organized. After the varnish is cured, polishing and other treatments should be carried out. For example, the requirement of lamp reflection in the figure is that it looks straight. In terms of specific operation, it is necessary for every FRP practitioner to implement a feasible repair scheme according to the needs of customers and the actual situation.
