双头螺旋内齿轮精密注塑冷却工艺优化  

Optimization of Precision Injection Cooling Process for Double-headed Spiral Internal Gear

作　　者：宁敬威 林立 刘文 崔红伟 徐平均 胥树志 王菊维 马健 邬华东 Ning Jingwei;Lin Li;Liu Wen;Cui Hongwei;Xu Pingjun;Xu Shuzhi;Wang Juwei;Ma Jian;Wu Huadong(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Information and Intelligent Engineering,Zhejiang Wanli College,Ningbo 315100,China;Ningbo Shuanglin Components Co.,Ltd.,Ningbo 315600,China)

机构地区：[1]太原理工大学机械与运载工程学院,太原030024 [2]浙江万里学院信息与智能工程学院,浙江宁波315100 [3]宁波双林部件股份有限公司,浙江宁波315600

出　　处：《工程塑料应用》2022年第7期79-85,共7页Engineering Plastics Application

基　　金：中国创新挑战赛项目(2021E006);宁波市2025重大专项(202002P2004);浙江省基础公益研究计划(LGG20E050004);奉化区产业链关键核心技术“揭榜挂帅”项目(202106201)。

摘　　要：以双头螺旋内齿轮注塑模冷却工艺为例,探究不同冷却工艺方案对成型精度的影响。根据双头螺旋内齿轮结构特点,采用三维建模软件UG(Unigraphics NX)构建齿轮结构模型,运用响应面法确立模具温度、熔体温度、保压压力和保压时间等最优注塑工艺参数,提出三种不同的冷却工艺方案,运用正交试验法确定最优的冷却水道布局参数,通过Moldflow软件对不同方案的流动前沿温度、回路冷却介质温度以及翘曲变形量进行分析比较,结果表明,轴向冷却工艺方案流动前沿温度差为23.7℃,浮动最小,回路冷却介质温度差最小,且整体翘曲变形量为0.2748 mm,模拟效果最好。采用最优冷却工艺方案进行模具设计开发,并进行试模。试模结果表明,实际注塑产品成型精度满足设计要求,验证了优化工艺方案的可行性与模流分析的可靠性。The cooling process of injection mold for double-headed spiral internal gear was taken as an example to explore the influence of different cooling process schemes on the forming accuracy.According to the structural characteristics of double-headed spiral internal gear,the structure model of gear was built by using 3D modeling software UG(Unigraphics NX),and the optimal injection process parameters such as mold temperature,melt temperature,holding pressure and holding time were determined by using response surface methodology.Three different cooling process schemes were proposed.The optimal cooling channel layout parameters were determined by orthogonal experiment.Moldflow software was used to analyze and compare the flow front temperature,loop cooling medium temperature and warpage deformation of diffienert schemes,The results show that for axial cooling process scheme,the temperature difference of flow front is 23.7℃,of which the floating is the smallest,the temperature difference of loop cooling medium is the smallest,and the overall warpage deformation is 0.2748 mm,which has the best simulation effect.The optimal cooling process was adopted to design and develop the mold,then the mold was tested.The test results show that the molding precision of the actual injection products meets the design requirements,which verifies the feasibility of the optimized process scheme and the reliability of the mold flow analysis.

关 键 词：双头螺旋内齿轮 冷却工艺 精密注塑 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]