基于正交试验的PET瓶拉伸吹塑优化设计  

Optimization Design of PET Bottle Stretch Blow Molding Based on Orthogonal Test

作　　者：刘良先 冯志华[1] 呼春雪 葛嵇南 LIU Liangxian;FENG Zhihua;HU Chunxue;GE Jinan(School of Mechanical and Electrical Engineering,Soochow University,Suzhou 215000,China)

机构地区：[1]苏州大学机电工程学院,江苏苏州215000

出　　处：《中国塑料》2020年第6期73-79,共7页China Plastics

摘　　要：针对部分聚对苯二甲酸乙二醇酯(PET)成型瓶靠近底端壁厚较小的缺陷,采用Polyflow仿真软件对PET瓶拉伸吹塑成型过程进行数值模拟。重点采用交互作用的正交试验方法,对瓶坯的加热温度、拉伸杆拉伸速度、预吹压力、延迟时间和高吹压力等工艺参数进行优化组合,使瓶子的最小厚度增大,瓶体更加均匀。结果表明,较优组合工艺参数分别为:延迟时间0.06 s、拉伸速度为1.6 m/s、预吹压力0.7 MPa、瓶坯温度110℃;优化后最小壁厚增大了28%,瓶体壁厚均匀度提高了63%。Aiming at the defect of small wall thickness near the bottom end of some molded PET bottles,a Polyflow®simulation software was adopted to perform a numerical simulation for the stretch blow molding process of PET bottles.The interactive orthogonal test method was used to optimize the combination of process parameters including the heating temperature of parison,the stretching speed of rod,pre-blowing pressure,delay time and high blowing pressure so as to improve the minimum thickness and uniformity of the bottle.An optimum combination of process parameters was achieved when the delay time was set as 0.06 s,the stretching speed as 1.6 m/s,the pre-blowing pressure as 0.7 MPa,and the heating temperature was set as 110°C.After the process parameters were optimized,the minimum wall thickness and wall thickness uniformity increased by 28%and 63%,respectively.

关 键 词：拉伸吹塑 数值模拟 交互作用 正交试验 工艺参数 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]