共查询到20条相似文献,搜索用时 156 毫秒
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基于模流分析,利用田口(正交)试验方法对汽车门把手的气体辅助注射成型工艺进行优化,使其达到最优的初始气体穿透量,得到合格的制品。选择注气时间、注气压力、注气延迟时间、预注射量4个主要因素进行正交模拟试验。用四因素三水平正交试验表进行模拟试验设计,采用方差分析法研究了这4个因素对初始气体穿透量的影响,得知其中影响较大的因素是预注射量。对气体辅助注射成型工艺进行优化,为改善制品质量、得到合格穿透深度的制品提供指导,从而缩短试模时间,提高生产效率。 相似文献
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气辅注射成型参数设置不合理会造成吹穿、气指、缩水、穿透不足等各种成型缺陷.利用Moldflow软件采用正交实验法对提手GAIM的主要工艺参数:熔体温度、注射时间,熔体体积、气体延迟时间、气体注射时间,及压力进行模拟分析,在对每次实验结果进行分析基础上,对成型参数进行进一步优化.采用优化工艺,气体贯通整个提手,产品质量减... 相似文献
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在塑料注射成型过程中,影响塑件质量的因素多种多样,其中,工艺条件直接影响着塑件的最终质量。将正交试验设计与数值模拟相结合,研究了线槽注射成型过程中的主要工艺参数对最终质量的影响规律,并对主要工艺参数进行了优化设计,获得了兼顾体积收缩率和翘曲变形的工艺参数组合。 相似文献
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基于气体辅助注射过程的数值模拟,利用Taguchi试验方法设计了L18(37)试验矩阵,采用标准方差分析方法,分析了GAIM工艺参数对制品翘曲的影响。研究表明:在所选择的工艺参数中,对翘曲影响权重依次为气体保压时间、熔体温度、预注射量、延迟时间、气体压力、注射时间和模具温度。此外,采用单因素法研究气体控制参数对制品翘曲的影响。结果表明:气体保压时间增加10 s,制品翘曲量减小36.9%;提高气体压力和增加延迟时间,制品翘曲量减小。 相似文献
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应用Moldflow有限元分析软件,针对支撑件产生缺陷的原因,合理设计模具的浇注系统和温度调节系统,以翘曲变形量作为质量指标,采用多因素正交法获得塑件在熔料温度、模具温度、保压压力、保压时间、注射时间五因素四水平下成型的翘曲变形量,采用方差分析比较了不同工艺参数对翘曲变形量的影响程度,得到了优化的工艺参数组合。 相似文献
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H. ?ktem 《Journal of Materials Engineering and Performance》2012,21(1):25-32
Plastic injection molding plays a key role in the production of high-quality plastic parts. Shrinkage is one of the most significant
problems of a plastic part in terms of quality in the plastic injection molding. This article focuses on the study of the
modeling and analysis of the effects of process parameters on the shrinkage by evaluating the quality of the plastic part
of a DVD-ROM cover made with Acrylonitrile Butadiene Styrene (ABS) polymer material. An effective regression model was developed
to determine the mathematical relationship between the process parameters (mold temperature, melt temperature, injection pressure,
injection time, and cooling time) and the volumetric shrinkage by utilizing the analysis data. Finite element (FE) analyses
designed by Taguchi (L27) orthogonal arrays were run in the Moldflow simulation program. Analysis of variance (ANOVA) was then performed to check
the adequacy of the regression model and to determine the effect of the process parameters on the shrinkage. Experiments were
conducted to control the accuracy of the regression model with the FE analyses obtained from Moldflow. The results show that
the regression model agrees very well with the FE analyses and the experiments. From this, it can be concluded that this study
succeeded in modeling the shrinkage problem in our application. 相似文献
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Chung-Feng Jeffrey Kuo Te-Li Su 《Journal of Materials Engineering and Performance》2007,16(5):539-548
Liquid crystal display (LCD) light-guide plate injection molding has always had the unexpected deformation issue which results
in variations in the quality of the resulting products. The main cause for this lies in the setting of the processing parameters.
The objective of this paper is to combine grey relational analysis (GRA) with the Taguchi method to optimize multiple-quality
injection molding processing parameter combination. First, a L18(21 × 37) orthogonal array was used to plan out the processing parameters that would affect the injection molding process. Then GRA
was applied to resolve the drawback of single quality characteristics in the Taguchi method, and then the optimized processing
parameter combination was obtained for multiple quality characteristics from the response table and the response graph from
GRA. The quality characteristics of this experiment were the depth and angle of the light-guide plate V-cut microstructure.
Signal-to-noise ratio (SN ratio) calculation and analysis of variance (ANOVA) would be performed to look into the results
obtained from the experiment. From ANOVA the significant factors could be obtained which had the greatest effect on the light-guide
plate quality characteristics, in other words, by controlling these factors, the quality characteristics of the LCD light-guide
plate could be effectively controlled. Finally, the reliability and reproducibility of the experiment was verified by confirming
a confidence interval (CI) of 95%. 相似文献
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基于Taguchi试验方法,研究共注射成型工艺参数对熔体追赶距离的影响,获得各个因素对熔体追赶距离的影响度。结果表明:熔体注射速度的影响度最大,模具温度和中心层熔体注射温度次之,而壳层熔体注射温度的影响度最小。获得了塑料共注射成型中最佳工艺参数的组合,可用于指导实际生产。 相似文献
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利用田口实验优化法配合水模拟实验法设计了铝合金旋转叶轮除气技术.选用L9田口正交表分析旋转叶轮除气技术的3个控制因子,包括转速、气体流量及叶轮设计.研究结果显示,使用水模拟实验法配合田口实验法,可有效的减少设计优化旋转叶轮除气技术的实验数.通过田口实验法,得出旋转叶轮除气技术的最佳参数组合,其中最重要的控制因子为转头的叶轮数目、转速和气体流量,最佳参数分别为6个叶轮片、转速500 rpm及除气气体流量2L/min. 相似文献
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Kuo-Ming Tsai Chung-Yu Hsieh Wei-Chun Lo 《Journal of Materials Processing Technology》2009,209(7):3469-3477
The purpose of this study is to determine the effects of process parameters on optical quality of lenses during injection molding. The quality characteristics chosen are light transmission, surface waviness and surface finish. The Taguchi method is used to perform screening experiments to identify the important significant process parameters affecting quality of lenses. Through empirical and theoretical analysis, the most significant process parameters affecting surface waviness is the melt temperature, followed by mold temperature, injection pressure and packing pressure. On the other hand, injection molding process parameters are found to have little effect on light transmission and surface finish of lenses. Regression approach is then implemented based on surface waviness data from full factorial experiments to formulate the regression models. Three different regression methods are used, namely, linear, exponential and nonlinear regression. Verification experiments are executed to examine the accuracy of the regression model for predicting quality characteristics of lenses. The result showed the highest accuracy prediction of surface waviness was from a nonlinear regression model. An error of only 4.24% suggested the existence of a correlation among injection molding process parameters. 相似文献