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首页> 外文学位 >Design for robustness of a thin walled injection molded component to maximize dimensional stability and reduce warpage.
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Design for robustness of a thin walled injection molded component to maximize dimensional stability and reduce warpage.

机译：薄壁注塑成型部件的坚固性设计，可最大化尺寸稳定性并减少翘曲。

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摘要

One of the most difficult problems with injection molding of thin walled plastic components is uncontrolled shrinkage and warpage. Common practice is to use trial and error to determine the settings for the process variables. This method is time and resource intensive and rarely results in an optimum solution. One trend in industry is to produce components with thinner walls in an attempt to reduce material cost, decrease component weight, and increase production. The processing variables for injection molding are also highly coupled and have inherent noise. Applied research was completed using a robust engineering methodology to identify the optimal settings for the process that minimized part warpage.; An L18 Taguchi style design of experiment was used to investigate the effects of process variables with the addition of noise into the system. The noise included variations of wall thickness, addition of glass fibers into the material, and the production cycle pull point at which the component is pulled from the mold. A 3-dimensional box shaped component and mold was used to determine the robust process of the thin walled component to maximize dimensional stability and minimize warpage. A warpage index was created as a metric as a measure of the total warpage of the component. A detailed measurement analysis was completed of the entire component by using a laser scanner and traditional flatbed scanner. An anisotropy study was also completed on the component.; As a result of this applied research, components were produced with less warpage than using conventional methods. Significant cycle time reductions were also realized without degradation to key characteristics of the component.
机译：薄壁塑料部件的注塑成型最困难的问题之一是无法控制的收缩和翘曲。常见的做法是使用反复试验来确定过程变量的设置。该方法耗费时间和资源，很少能找到最佳解决方案。工业上的一种趋势是生产具有更薄壁的部件，以试图降低材料成本，减小部件重量并提高产量。注塑成型的工艺变量也高度耦合并且具有固有噪声。应用研究使用可靠的工程方法完成，从而确定使零件翘曲最小化的最佳工艺设置。采用L18 Taguchi风格的实验设计来研究过程变量在系统中添加噪声的影响。噪声包括壁厚的变化，向材料中添加玻璃纤维的时间以及将组件从模具中拉出的生产周期拉出点。使用3维箱形部件和模具来确定薄壁部件的坚固过程，以最大程度地提高尺寸稳定性并最小化翘曲。创建了翘曲指数作为度量标准，以度量组件的总翘曲。使用激光扫描仪和传统的平板扫描仪对整个组件进行了详细的测量分析。还对该组件进行了各向异性研究。这项应用研究的结果是，与使用传统方法相比，所生产的零件翘曲更少。在不降低组件关键特性的情况下，也可以显着缩短周期时间。

著录项

  • 作者

    Sobolak, Steven Joseph.;

  • 作者单位

    Lawrence Technological University.$bEngineering in Manufacturing Systems.;

  • 授予单位 Lawrence Technological University.$bEngineering in Manufacturing Systems.;
  • 学科 Engineering Mechanical.
  • 学位 D.Eng.
  • 年度 2007
  • 页码 268 p.
  • 总页数 268
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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