How to produce carbon fiber roller

        The roll/shaft is usually made of magnesium-aluminum alloy, stainless steel, rubber, polyglycerol ester, etc. For example, in terms of size, the flat idler for belt conveying on small automatic lines, such as the roller for large paper machinery, has a length of more than 10 meters, a diameter of more than 1500 mm, usually within 1 meter, and a diameter of less than 159 mm. Then, let's take a look at the brief description of the carbon fiber roller processing technology.

          Machining of Carbon Fiber Roller    

          Carbon fiber roller shaft is generally used in high precision instruments, which has high requirements in balance accuracy. Conventional roller shaft production is composed of roller body initial turning, initial static balance, shaft head assembly, finish turning and dynamic balance. After roll forming, coating, galvanizing, Teflon coating, rubber coating, chromium plating, ceramic coating, oxidation and other surface treatment or embedding are needed due to the needs of rust prevention, corrosion resistance, wear resistance and support. In terms of production and manufacturing, it includes the following points:

1. Manufacturing of blank carbon fiber coil 

         The winding process of carbon fiber is to wind the continuous fiber immersed in the resin colloid solution on the mandrel according to a certain rule, and the carbon fiber roller is usually blank in the winding process of carbon fiber tube. Curing and demoulding to obtain the product. According to the physical and chemical state of resin matrix during fiber winding formation, it can be divided into dry winding, wet winding and semi-dry winding.    

         Dry coiling refers to the use of prepreg or tape treated with prepreg, which is heated and softened by a coiler to make it into a viscous flow state and then coiled on a mandrel. Wet winding means that the fiber bundle is directly wound on the mandrel under tension control after being impregnated with slurry.  

         Semi-dry winding is to add a set of drying equipment on the way of winding into core type after the fiber is infiltrated with glue to remove the solvent in the glue yarn. Compared with the dry method, the pre-impregnation process and equipment can be omitted, and compared with the wet method, the bubble content in the product can be reduced.2. Treatment of outer circle and section      

         For the peripheral and cross-sectional machining of carbon fiber rolls, each program achieves different targets in terms of economic accuracy and surface roughness. The division of procedures is extremely fine, including rough turning, medium finish turning, finish turning, rough grinding, abrasive, superfinishing, fine turning, etc. The processing of the periphery and section of the carbon fiber roller shaft is divided into the following three stages:    

         Rough machining stage: rough machining shall be carried out with machine tools with high power, low precision and high productivity as far as possible, so as to give full play to the potential of equipment and improve production efficiency. At this stage, it is necessary to find and deal with blank defects in time, mainly to effectively remove most of the residual amount of various machined surfaces, and to provide a benchmark for semi-finishing. If the error cannot be corrected, correct the position error of the previous process in time, such as bending, displacement, eccentricity, deviation, non-parallelism, non-perpendicularity, etc. It is marked as invalid to avoid wasting man-hours for further processing.    

         Semi-finishing stage: finish the secondary surface and prepare for the finishing work of the main surface. Defects caused by uneven resin distribution in the manufacturing process shall be repaired or treated in time through manual cleaning and careful inspection of air holes, white spots, pits and other surface problems.   

         Finishing stage: Grind the magnesium-aluminum alloy material at both ends of the roller shaft to improve the surface roughness and overall uniformity of the workpiece. Use high-precision lathes and grinders to finish the surface of the roller body. Cut off the excess resin layer from the workpiece. The shape tolerances such as roundness, cylindricity and straightness meet the requirements of the drawing. Dynamic balance test.