精密滴灌灌水器注塑工艺模拟与优化  

Simulation and Optimization of Injection Molding for Precise Drip Emitters

作　　者：伍志刚[1] 史玉升[1] 魏青松[1] 董文楚[2] 黄树槐[1] 

机构地区：[1]华中科技大学材料科学与工程学院 [2]武汉大学水利水电学院

出　　处：《农业机械学报》2007年第4期42-46,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家"863"高技术研究发展计划资助项目(项目编号:2002AA6Z3083)

摘　　要：通过正交优化试验设计,以注塑工艺模拟代替实物进行试验,研究了注塑工艺参数对LDPE材料灌水器制品收缩率的影响。模拟确定了各工艺参数对制品收缩率及收缩率变化的影响度,并优化取得了最佳的注塑工艺参数。在模拟结果的基础上一次试模成功,灌水器制品的流道部分精度达到±0.01mm。Controlling the volumetric shrinkage of injection parts effectively is the key step of ensuring high forming precision for drip-emitters, and the injection molding determines directly the volumetric shrinkage. Adopting an orthogonal experimental design method, and by using injection simulations instead of practical experiments, the effects of some important process parameters, such as holding pressure, fill time, holding pressure time etc. on the volumetric shrinkage of emitters in LDPE were studied. The optimum process parameters and the influence degree of process parameters on the average volumetric shrinkage and the volumetric shrinkage variation were obtained. On the basis of the injection simulations, the work of molding trial was succeeded at one time, and the precision of the emitter channel was lower than ±0.01 mm.

关 键 词：滴灌灌水器 注塑工艺 体积收缩率 

分 类 号：S275.6[农业科学—农业水土工程] TQ320.662[农业科学—农业工程]