Abstract: Compared with graphite crucibles, the excellent performance of carbon/carbon composite crucibles can better meet the needs of czochralski silicon production. Traditional carbon/carbon crucibles are formed by needle punching or manual winding, which has low efficiency and poor product consistency. The use of dry fiber reinforced carbon/carbon crucible can give full play to the role of carbon fiber, and can realize automatic winding and forming. Based on the filament winding technology, this paper aims to provide theoretical research on the automatic winding line design of carbon/carbon crucible preforms and simulation of winding trajectories of winding machines. First, according to the special asymmetric structure of the crucible, based on the principle of non-geodetic winding, the winding line of the carbon/carbon crucible preform is designed and simulated, and then the three-axis winding device is used to plan the movement trajectory of the winding line. The best motion trajectory is determined under different constraint conditions, and finally the method of polynomial fitting is used to reverse the coordinates of the doffing point and perform error analysis. The results show that the designed winding wire type can be stably and evenly wound on the core mold, and the designed winding motion track can achieve the specified winding wire type, which satisfies the winding principle and manufacturability of the carbon/carbon crucible. It provides a certain theoretical guidance for the production of carbon/carbon crucible.

Key words: carbon/carbon crucible, non-geodesic, winding design, winding trajectory planning, composites