喷头流道结构参数对高黏度含能材料直写成型3D打印挤出过程稳定性影响OA北大核心CSTPCD

To study the effects of extrusion system nozzle runner structural parameters(cone angle,outlet diameter,and molding section length)on the fluid flow of energy-containing material extrusion process in the direct-in-writing-forming(DIW)technolo-gy,an extrusion model of high-viscosity energy-containing materials based on the Polyflow Extrusion module was established,and was verified by extrusion experiments under the working conditions of direct-write 3D printing.The study analyzed the ef-fects of cone angle range(90°-130°),outlet diameter(0.75-2 mm),and molding section length(5-20 mm)on the extrusion process of high-viscosity energy-containing materials through the established model.The results show that the Polyflow Extrusion module can accurately simulate the flow behavior of composite energy-containing materials.When the cone angle is 100°,and the nozzle outlet diameter is between 1.5 mm and 1.75 mm,the extrusion process is relatively stable with small extrusion expan-sion.Additionally,as the length of the molding section grows,the required inlet pressure increases while the outlet expansion ef-fect decreases.