The interaction of the main process parameters such as barallel and mould temperatures are important in micro injection moulding for producing high quality moulded parts with accurate dimensions.
The interaction between A and C prove that the barrel temperature and holding pressure affect the solidification of moulded parts. The interaction of A and D shows that the melt fills in the micro cavity is significant.
5. Conclusion and future work
Design of experiment using Taguchi L16 Orthogonal Array has been conducted with four process parameters namely, mould temperature, barrel temperature, holding pressure, and injection speed in order to understand the effect of these parameters during the micro injection moulding process. Using the L16 Orthogonal Array experiments have been carried out to produce test parts and obtain the demoulding force as the measured response. Each trial was repeated ten times and average values were used in the analysis of the results. The analysis was carried out using Minitab16. Two criteria for S/N were used The results obtained showed that for nominal-the best an optimum setting level of process parameters were A2B2C2D2 and for bigger- the-better the optimum setting level of process parameters were A2B2C2D1. The study also showed some interaction between parameters A and C, A and D, and B and C. This study has shown that the most significant parameters are mould temperature and holding pressure. Different polymers will be used in the future to study the effects of these process parameters upon different materials.
摘要:本文重点研究了微注塑成型工艺参数。在这项研究中的四个工艺参数,即,桶温度,模具温度,保压压力和注射速度被认为。为了捕捉他们的行为与每个参数的两水平L16正交阵列被用来生产15毫米×20毫米×1毫米微流控平台使用的环烯烃共聚物(COC)的设计,一个共同的聚合物。在微注射成型过程中测定脱模力。十六次试验重复了十次,纳入过程的变化,系统和随机噪声的实验过程。使用田口方法,以确定工艺参数的影响后,脱模力和它们的噪声敏感性的结果进行了分析。此外,结果还表明,这些过程参数之间的两级相互作用的存在或不存在。这项研究有助于了解这些工艺参数的特点,其主要的影响,相互作用和对噪声的敏感性,并调整他们的最佳性能。论文网
关键词:微注射成型,实验设计,正交阵列,田口分析。
1 简介
在微工程技术导致产品小型化趋势的迅速提高。微/中尺度组分和产品在区域内越来越受到重视,像通讯,IT,医疗保健,汽车部门和消费品。此外,开发新的小型化的产品包括医疗和生物技术给微技术重要作用面对宏观和纳米世界[1][2]。微注射成型(MIM)是生产各种微型元件如微型泵、微型齿轮可靠的复制技术和经济,和光栅的大量元素。在所有这些应用程序中,复制的部件上发现的微特征的质量是一个因素,影响选定的复制过程的可靠性。这很大程度上取决于它们的尺寸,宽高比和整体几何[3]。
表面质量达到和纵横比在复制的微观特征强调任何微制造工艺的重要特征,并确定制造限制的一个给定的过程或材料组合[4]。例如,表面质量和边缘定义必须进行系统。此外,实现高纵横比的模具微功能仍然是困难的[5]。因此,在微注塑成型过程中,它是非常必要的,以了解影响复制能力的因素[4]。
为了提高微注塑成型复制过程的质量,许多研究小组已经研究了不同的领域,如加工,模具创新,材料和插入制造。虽然熔体温度高,模具温度和注射速度被认为是最好的结果,生产高品质的零件,高模具温度的后果介绍工具创新加热和冷却工具[6]。因此,工艺产量减少和成本的模制件增加。