Carbon fiber board has clear patterns, smooth surface, mirror like brightness, and small thickness tolerance. It has advantages such as high strength, light weight, corrosion resistance, and small variation under large temperature differences. Therefore, it can be widely used in various high-strength structural components that require weight reduction. This article provides a simple analysis of the production process of carbon fiber board based on practical work.
1. Cutting of prepreg!
The prepreg should be cut according to the length and width of the board, and the thickness of the prepreg should be determined based on the thickness of the board. Conventional sheet thicknesses include 0.2mm, 0.3mm, 0.5mm, 0.8mm, 1.0mm, 1.5mm, 2.0mm, etc. Jiangsu Boshi has rich experience in carbon fiber board production and can customize carbon fiber boards of different thicknesses according to customer needs. The thicker the board, the more layers of pre impregnated material need to be stacked. For unconventional sized boards, reasonable design must be carried out before cutting the pre impregnated material. Through design optimization, the pre impregnated material can be maximally utilized to reduce the generation of edge margins and lower production costs.
2. Laying of prepreg
The fiber laying direction should be set according to the main direction of the load. In the point stress state, the laying layer with an angle of 0 ° corresponds to normal stress, the laying layer with an angle of+45 ° corresponds to shear stress, and the laying layer with an angle of 90 ° is used to ensure sufficient positive pressure in the radial direction of the composite material part. If the load borne by the composite material board is mainly tensile and compressive load, then the laying direction should be selected in the direction of tensile and compressive load; If the load borne by the composite material component is mainly shear load, then the layer should be laid in pairs at 45 ° and -45 °. If the load borne by the composite material component is complex and includes multiple loads, then the layer design should be mixed in multiple directions at 0 °, ± 45 °, and 90 °.
The different layering sequences not only affect the initial load, propagation rate, and fracture toughness of matrix cracks, but also have a significant impact on the saturation and crack density of matrix cracks. For example, for orthogonal laminates, there is a corresponding relationship between fracture toughness and crack propagation rate under the same external load. However, the advantages and disadvantages of different layering sequences cannot be generalized. The designability advantages of composite materials should be fully utilized according to different usage requirements.
3. Curing of prepreg:
After cutting and orderly stacking, the prepreg needs to enter the baking and curing process. The prepreg is placed in a mold at a predetermined temperature and heated under pressure. After the hot pressing mold is closed, the laminated material gradually solidifies under hot pressing and reaches a certain degree of solidification. The mold is opened and pulled away from the hot pressing mold by a traction device, completing the solidification process.
During the entire curing process, the curing time and temperature should be adjusted in stages according to the performance requirements of the board. Different temperatures and heating times will have an impact on the material properties of carbon fiber boards. In the actual production process, while maintaining dimensional stability during the post curing stage of the parts, the time of the hot pressing stage should be shortened as much as possible.
4. Post processing of carbon fiber board:
After curing and forming, carbon fiber board needs to undergo post-processing such as cutting and drilling for precision requirements or assembly needs. Under the same cutting process parameters, cutting depth, and other conditions, selecting different materials, sizes, and shapes of cutting tools and drills can result in significant differences in effectiveness. At the same time, factors such as the force, direction, time, and temperature of the cutting tools and drills can also affect the machining results.
Our company has over ten years of customization experience in the field of carbon fiber, with an experienced technical team and complete production and processing equipment. If you have customization needs for carbon fiber products, you can directly contact our technical team.