【作者】 张波；

【导师】 毛华杰； 华林；

【作者基本信息】 武汉理工大学 ， 材料加工工程， 2004， 硕士

【摘要】 本文通过对气体辅助注射成型工艺的系统研究，针对气辅成型工艺领域存在的实际问题，就气体辅助注射成型工艺的设计提出了较为全面的解决方案：分析总结出气道结构及气体注射参数对成型过程的影响规律；归纳出气体注射参数的优化设置经验公式。 在气体辅助注射成型工艺设计方面：通过深入分析气体辅助注射成型工艺过程及气体穿透特点，结合目前在气辅成型工艺实践方面的研究成果，针对气体辅助注射成型工艺的产品壁厚设计、产品结构设计、气道布置及尺寸设计、成型模具设计和成型工艺参数设置提出了一套较为系统的设计参考准则。 在气道结构及气体注射参数对成型过程的影响规律和气体注射参数的优化设置方面：本文建立了多个具有不同气道等效半径和气道长度的典型气辅成型制件CAD模型：以该模型为基础，采用目前较为成熟的塑料成型CAE软件Moldflow Plastics Insight来模拟这些模型的气体辅助注射成型工艺过程；通过对分析模拟结果数据的综合分析，总结出气道等效半径及长度、气体注射延迟时间、气体注射时间和气体注射压力对气辅成型过程的影响规律及其对产品最终成型质量的影响规律。此外，通过从模拟试验结果中提取出相应的成型质量衡量数据，并结合气道等效半径和气道长度数据，运用数理统计方法对这些数据进行分析处理，推导出气体注射延迟时间与气道结构尺寸之间的函数关系式、气体注射压力与气体注射延迟时间及气道结构尺寸之间的函数关系式和气道穿透长度与气道结构尺寸、气体注射延迟时间之间的函数关系式。在这些函数关系式的指导下，就可以计算出气体注射参数的优化设置数值及气道穿透长度的预测值。 在本文末尾，通过实验模拟的方式，对推导出的气体注射参数优化设置经验公式进行了验证，确认这些公式是具有较好的预测精度和参考价值的。更多还原

【Abstract】 During the work of this thesis, the author thoroughly researched the Gas-assisted Injection Molding (GAIM). For settling the problems of GAIM, the process design of GAIM was concluded, the rule of affection for GAIM process by gas channel structure and gas process parameters was revealed, furthermore, the setting functions of gas process parameters were created.In the GAIM process design research, with in-depth analysis of GAIM procedure and gas penetration behavior, as well as combined with current achievements, the GAIM components thickness and structure design criterions, gas channel layout and dimension design standards, GAIM molds design rules and process parameters setting method were summarized.In this thesis, several typical GAIM models were created with different gas channel dimensions. By the MPI (Moldflow Plastics Insight) simulation of these models, a series of data were recorded. Through integrated analysis of these data, the affection rule of GAIM by gas channel equivalent radius, gas injection pressure and gas injection time were concluded. Moreover, with the mathematic deduction of the simulation setting parameters and result data, the expression between gas delay time and gas channel dimensions; the function between gas injection pressure and gas delay time with gas channel dimensions; as also, the gas penetration length formula with variables of gas channel dimensions, gas delay time were derived. With these expressions, we can easily figure out the optimized gas injection parameters and predict the gas channel penetration length.Finally, a couple of verify experiments were executed and the above conclusions were proved to be relatively correct and helpful for the design of GAIM process.更多还原