Carbon fiber products benefit from the excellent products that have successfully replaced metal pipes and plastic pipes in many fields and industries. More and more carbon fiber products can be seen. If there is no problem with the performance requirements of carbon fiber products, there will be no problem with the performance requirements of carbon fiber products, and there will be certain requirements for the appearance of carbon fiber products, After all, carbon fiber products do not have high requirements for the performance of carbon fiber products, the appearance of carbon fiber products and the appearance of carbon fiber products.
The surface polishing of carbon fiber is mainly divided into rough polishing and fine polishing.
The whole surface polishing process of carbon fiber products has several advantages
1. After the carbon fiber is formed, the surface is smoothed by sandpaper or grinding equipment
2. Water cleaning: there are many carbon powder particles on the polished carbon fiber surface, which need to be cleaned in water. Generally, the automatic filtering circulating water system is used.
3. Wipe the water stains on the surface of carbon fiber and dry them with dry cloth
4. Bake. Put the dried carbon fiber product into the oven at 80 ℃ for about 5 minutes to ensure full evaporation
5. Spray paint on the surface. According to different surface shapes, design the spray gun route to ensure the paint surface is even and has texture. Do not spray too much to cause paint flow
6. Spray paint generally includes primer, color paint and surface transparent paint. Spray once and bake once (120 ℃ for 15 minutes and the last layer for more than 30 minutes)
7. If there are paint particles or scratches on the surface, please grind the surface with a cloth machine until it is smooth.
8. Package, cover with protective film and box.
Then the rough polishing inside is to use pig iron sheet or a small amount of fluffy textile fabric for polishing. Let's take a look at the polishing method of cast iron plate, using carbon fiber products to polish, parallel to the grinding surface. At the beginning, the product moves from the center to the edge. Do not use too much pressure. The product moves from the edge to the center, and the pressure gradually decreases. There is no need to polish the abrasive material, just add water to cool it.
In order to stabilize the carbon fiber board during polishing, the polishing surface can be parallel to the parallel plane of the polishing plate and the plane of the polishing plate, and the polishing surface can be pressed into the rotating grinding plate evenly. At the beginning of polishing, the carbon fiber board moves from the management center to the edge, and the working pressure should not be too high. After finishing, the carbon fiber board moves from the edge to the management center, and the working pressure gradually decreases. In rough grinding, only cooling water is added, and no polishing wear-resistant material is added. The environmental humidity of the throwing plate is very harmful to the polishing quality. When the carbon fiber board is in 1-5 s, the shrinkage water on the surface of the carbon fiber board will be evaporated in 1-5 s. Generally, the rough polishing time is 2-5 minutes. It stipulates that all scratches on the polished surface of the carbon fiber board are removed. Remove the sample after rough polishing with tap water or aqueous solution containing detergent.
Use 1 μ M alumina suspension, diamond grinding paste, 1 μ M alumina slurry for fine polishing. Sprinkle the fluffy cloth with grinding paste or suspending agent, add appropriate amount of emulsifier, and polish on the polishing machine for 2 to 3 minutes until all scratches are removed. Remember to clean the lubricant, grinding paste, etc. with clean water after wiping.
Add one more μ The second polishing was carried out with the mixture of aluminum oxide and aluminum oxide. First, use 2.5 μ Then add appropriate emulsion liquid lubricant and grind in the grinder for 2-3 min until all of them are removed after coarse and fine polishing. Polish the surface of the specimen with tap water or an aqueous solution containing detergent.
1 μ When polishing, the mixture of aluminum oxide was evenly distributed on the plush velvet cloth, and wechat lubricant was added for polishing. The grinding time is about 3-5 minutes and the grinding speed is 100-150 R / min. Clean the sample with tap water or clear water solution. When observed under 100 times microscope, the metallographic analysis specimen should be polished, and there should be no tailing, and there should be no tailing. The porosity is completely presented and there is no tailing. If not, it should be polished again.
