基于场协同原理的注射打印技术高效塑化螺杆设计  

High-efficiency Plasticization Screw Designs for the Injection Printing Technology Based on the Field Synergy Principle

作　　者：朱家威 王世檩 王泽欣 张龙昊 杨华光 曾宪奎[1] 鉴冉冉 ZHU Jiawei;WANG Shilin;WANG Zexin;ZHANG Longhao;YANG Huaguang;ZENG Xiankui;JIAN Ranran(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China;Kingfa Science and Technology Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061 [2]金发科技股份有限公司企业技术中心,广东广州510663

出　　处：《塑料工业》2024年第11期85-93,128,共10页China Plastics Industry

基　　金：国家自然科学基金项目(52206095);山东省自然科学基金项目(ZR2021QE232);山东省高等学校青创科技支持计划(2023KJ102)。

摘　　要：提出以挤出打印零件外壳为自身模具进行内部注射填充的注射打印增材制造策略,为实现高效高强熔融沉积成型提供了一种解决方案。基于场协同原理分析了普通小型低速螺杆塑化能力不足的问题,通过探讨不同场协同扭转元件排布及数量对螺杆塑化效率、熔融长度及温度标准差的影响,为小型高效塑化螺杆设计提供指导及技术支持,以解决注射打印技术小型注射装置与大容积注射以及小螺杆长径比与大塑化能力的矛盾。结果表明,场协同扭转元件引起的扭转螺旋流动,改善了螺槽内熔体的径向传质能力,提高了速度场与温度梯度场的协同作用,进而强化了螺杆塑化能力;增加场协同扭转元件的数量及分散程度可以提高螺杆塑化能力并减少螺杆末端温度标准差;具有更多分散布置的场协同扭转元件的螺杆F表现出更短的熔融长度和更小的螺杆末端温度标准差。场协同扭转元件的应用改善了打印阶段熔体塑化质量,延长了注射阶段螺杆注射行程,促进了注射打印技术在生产效率和产品质量方面的双重提升。An injection printing additive manufacturing strategy was proposed by using the outer shell of extrusion-printed part as its own mold for internal injection filling,providing a solution for efficient and high-strength fused deposition modeling.Based on the field synergy principle,the problem of insufficient plasticizing ability of the small low-speed conventional screw was analyzed.By exploring the influences of different arrangements and quantities of field synergy torsion elements on the plasticizing efficiency,melting length,and temperature standard deviation of screws,guidance and technical supports were provided for the designs of small and efficient plasticizing screws.The approaches were intended to address the contradiction between small injection device and large injection volume in the injection printing technology,as well as the contradiction between the small aspect ratio of screw and large plasticizing ability.The results indicate that the torsional spiral flow created by the cooperative torsion elements in the screw improves the radial mass transfer of the melt within the groove,enhances the interactions between the velocity and temperature fields,and consequently increases the screw plasticization capability.Increasing the number and dispersion of field synergy torsion elements could improve the screw plasticization capability and reduce the temperature standard deviation at the ends of the screw.The screw F with more dispersed field synergy torsion elements exhibits shorter melting length and smaller temperature standard deviation at the ends of the screw.The applications of field synergy torsion elements enhance the melt plasticization qualities during the printing stage,and extend the screw injection strokes during the injection stage,promoting the dual improvements of injection printing technology in terms of production efficiency and product quality.

关 键 词：注射打印 熔融长度 径向传质 场协同扭转元件 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]