中国塑料 ›› 2024, Vol. 38 ›› Issue (6): 90-97.DOI: 10.19491/j.issn.1001-9278.2024.06.014

• 加工与应用 • 上一篇    下一篇

基于响应面法的螺杆转子注射成型工艺研究

尹大帅(), 赵永强(), 黑刚刚, 李志斌   

  1. 陕西理工大学机械工程学院,陕西省工业化重点实验室,陕西 汉中 723001
  • 收稿日期:2023-10-13 出版日期:2024-06-26 发布日期:2024-06-20
  • 通讯作者: 赵永强,zyq0620@163.com
    E-mail:zyq0620@163.com
  • 作者简介:尹大帅(1998-),男,研究生,主要从事非金属螺杆转子及其加工工艺研究,zyq0620@163.com

Optimization of injection⁃molding process of screw rotor based on response surface method

YIN Dashuai(), ZHAO Yongqiang(), HEI Ganggang, LI Zhibin   

  1. Shaanxi Key Laboratory of Industrial Automation,College of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723001,China
  • Received:2023-10-13 Online:2024-06-26 Published:2024-06-20
  • Contact: ZHAO Yongqiang E-mail:zyq0620@163.com

摘要:

针对传统金属型螺杆转子制造工艺复杂、加工精度难以控制等问题,提出一种新型螺杆转子注射成型方法,尝试用塑料材质取代金属型螺杆转子。使用Moldflow模流软件对玻纤增强聚酰胺材料的螺杆转子齿面注射成型进行注塑模拟,将缩痕深度和翘曲变形作为质量标准,对影响塑件成型质量的7个工艺参数进行筛选分析,确定了影响2个质量标准的3个工艺参数。采用BBD响应面实验设计方法,研究了熔体温度、保压时间、保压压力等注塑工艺参数对缩痕深度和翘曲变形的影响,获得了最小缩痕深度和最小翘曲变形的多项式回归响应模型。利用回归模型优化的工艺参数组合为熔体温度281.0 ℃,保压时间18.7 s,保压压力115.7 MPa。数值模拟了最优参数组合,结果表明数值模拟与模型预测值的误差分别为3.75 %和0.53 %。

关键词: 螺杆转子, 响应面法, 缩痕深度, 翘曲变形

Abstract:

Aiming at the problems in the complicated process and the difficulty to control the precision of traditional metal type screw rotor, a new injection⁃molding method with a screw rotor was proposed to replace the metal type rotor with a plastic material. The Moldflow software was used to analyze the injection molding of the tooth surface of the screw rotor using glass⁃fiber⁃reinforced nylon as a raw material. The depth of shrinkage and warping deformation were taken as quality criteria to screen and analyze 7 process parameters affecting the molding quality of plastic parts, and 3 process parameters that had the greatest impact on the 2 quality standards were determined. A response surface experiment was designed through the BBD experiment. The influence of injection process parameters such as melt temperature, holding time, and holding pressure on the shrinkage depth and warp deformation was studied. A polynomial regression response model for minimum shrinkage depth and warp deformation was obtained. Using regression model, the optimal combination of process parameters was determined to be a melt temperature of 281.0 ℃, a pressure holding time of 18.7 s, and a pressure holding pressure of 115.7 MPa. The results indicated that the values obtained from the numerical simulation and prediction with the model were similar along with errors of 3.75 % and 0.53 %, respectively.

Key words: screw rotor, response surface method, indentation depth, buckling deformation

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