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本文采用CAE软件Moldflow对陶瓷螺杆组件的注射成型过程进行模拟分析,确定了最佳浇口方案,分析了不同流动速率对填充时间、填充压力、前沿温度分布以及最大剪切速率的影响,并确定了最佳的工艺参数。结果证明,采用CAE模拟软件对陶瓷螺杆的注射成型过程进行模拟分析,可以进行模具结构和工艺参数优化,不但提高了效率,还能减少制品缺陷,提高制品质量。 相似文献
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综述了熔接痕位置预测、优化和控制技术的研究进展,介绍了填充过程熔接痕形成的数学模型。对数值模拟技术、数值模拟技术结合数学规划理论、阀式浇注和大型注射成型制品多浇口进料顺序控制技术等3种技术的分析流程、预测方法和应用实例进行了详细介绍,其中基于数值模拟技术和数学规划理论结合的熔接痕位置确定新算法是行之有效的熔接痕位置优化技术,已成为当前研究热点。随着该技术的日趋成熟,应用范围将逐渐增大。而阀式浇注和大型注射成型制品多浇口进料顺序控制技术的实施可以成功避免注塑件熔接痕的出现,在大型零件生产中具有广阔的应用前景。 相似文献
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壳体制品注塑工艺参数CAE优化分析 总被引:8,自引:3,他引:5
应用Moldflow软件对壳体制品注射成型工艺参数进行了优化分析,模拟出制品成型过程中的最佳注塑压力、锁模力、模具温度、熔体温度、注射时间、保压压力和保压时间、冷却时间。采用该成型工艺参数结合合理的注塑模具能注塑出最佳的塑料制品,为成型过程的顺利进行提供指导依据,模拟结果具有一定的理论意义及实际指导价值。 相似文献
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利用Moldflow软件对电子镇流器底壳注射成型过程中最佳浇口位置和流动情况进行分析,确定了最佳浇口位置。通过对填充时间、气穴、熔接痕、锁模力曲线和流动前沿温度等数值模拟,预测塑件可能出现的缺陷,显示了Moldflow技术在模具开发过程中对于优化塑料注射模设计和优化注射工艺参数等方面所起到的显著作用。 相似文献
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分析了注射成型过程中影响薄壁制品应力翘曲的因素,给出了注射成型时制品翘曲变形的数学模型及其求解方法.利用数值模拟的方法,模拟出光盘片架注塑过程中的不同模具设计和工艺条件对其翘曲变形程度的影响.根据模拟结果,分析出在原材料和制品结构确定的情况下,流动不平衡和冷却不均衡是影响薄壁光盘片架应力翘曲的主要因素,提出了解决应力翘... 相似文献
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以加湿器底座为例,结合正交试验法和模流分析软件Moldfl ow,对不同注塑工艺条件下的底座零件成型过程进行分析,确定塑料件的翘曲量为塑料件表面质量的评价指标。通过对塑料件的翘曲量的极差分析,确定了模具温度、熔体温度、填充时间、保压方式和保压压力等工艺参数对塑料件翘曲量的影响程度的大小,绘制了水平影响趋势图,分析得出最优的注塑工艺参数配置,并对该工艺参数配置进行了模拟对比分析。 相似文献
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基于Moldflow的插座面板注塑成型分析与优化 总被引:1,自引:0,他引:1
以插座面板的注塑成型设计为例,借助Moldflow软件对其充模时间,注射压力、气穴、熔接痕和翘曲变形等进行模拟分析,根据结果有针对性地优化成型设计方案,从而可以提高制品质量,缩短模具设计制造和产品开发周期。 相似文献
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基于黏度幂率模型,建立了水辅共注成型充填流动过程的瞬态、纯薪性、非等温的理论模型,并采用有限体积法对水辅共注成型过程进行数值模拟。研究了内外层注射量、内外层熔体流变指数比、注水温度、注水速度、注水延迟时间、内层熔体温度和模壁温度等因素对充填过程的影响规律,并根据流变学理论阐述了其影响机理。 相似文献
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The rapid thermal response (RTR) injection molding is a novel process developed to raise the mold surface temperature rapidly to the polymer melt temperature prior to the injection stage and then cool rapidly. The resulting filling process is achieved inside a hot mold cavity by prohibiting formation of frozen layer so as to enable thin wall injection molding without filling difficulty. The present work covers flow simulation of thin wall injection molding using the RTR molding process. Both 2.5-D shell analysis and 3-D solid analysis were performed, and the simulation results were compared with the prior experimental results. Coupled analysis with transient heat transfer simulation was also studied to realize more reliable thin-wall-flow estimation for the RTR molding process. The proposed coupled simulation approach based on solid elements provides reliable flow estimation by accounting for the effects of the unique thermal boundary conditions of the RTR mold. 相似文献
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Soohong Kim Ching-Shin Shiau Byung H. Kim 《Polymer-Plastics Technology and Engineering》2013,52(11):1031-1037
During injection molding of micron or submicron scale features, incomplete filling frequently occurs, resulting from premature freezing of the polymer melt in contact with a cold mold. In order to overcome the filling difficulty without increasing the total cycle time, the mold surface temperature was raised rapidly by induction heating. A prototype mold insert with cooling channels was fabricated and integrated with a nickel stamp having nanoscale-grating structures. The nickel stamp surface was successfully heated from 25 to 258°C in 2.7 sec. Four different mold surface temperatures, 100, 150, 200 and 250°C, were tested to determine if the nanograting structures can be replicated with an optical quality cyclic olefin copolymer. Experimental results indicate that the nanocavities were successfully filled when the surface temperature reached 250°C, but mold release caused drag damages on the nanogratings. Further, coupled thermoelectromagnetic analyses were carried out to simulate the induction heating process of the nanostructured mold insert. The predicted surface temperature responses in general agree with the experimental ones and the simulation model can be used in the further development of process control and mold design in micro/nano molding. 相似文献
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通过模拟真实注射条件,应用Moldflow软件对ABS扣板注射成型工艺参数进行了优化分析,得出影响注射成型顺利进行的主要因素,并模拟制定出扣板注射成型的最佳注塑压力、锁模力、模具温度、熔体温度、注塑时间、保压压力、保压时间和冷却时间。采用该注射成型工艺参数并结合合理的注塑模具能注塑出最佳的ABS制品,为注射成型的顺利进行提供指导依据。 相似文献
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Gas‐assisted injection molding can effectively produce parts free of sink marks in thick sections and free of warpage in long plates. This article concerns the numerical simulation of melt flow and gas penetration during the filling stage in gas‐assisted injection molding. By taking the influence of gas penetration on the melt flow as boundary conditions of the melt‐filling region, a hybrid finite‐element/finite‐difference method similar to conventional‐injection molding simulation was used in the gas‐assisted injection molding‐filling simulation. For gas penetration within the gas channel, an analytical formulation of the gas‐penetration thickness ratio was deduced based on the matching asymptotic expansion method. Finally, an experiment was employed to verify this proposed simulation scheme and gas‐penetration model, by comparing the results of the experiment with the simulation. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 2377–2384, 2003 相似文献
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陶瓷粉末注射成型计算机模拟研究与应用 总被引:1,自引:0,他引:1
本文介绍了计算机模拟软件在陶瓷粉末注射成型工艺中的应用现状,举例说明了C-Mold软件在陶瓷粉末注射成形工艺模拟薄体半球的填充,并与实验的实际情况做比较,以探讨陶瓷材料在充填过程中的现象。 相似文献
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借鉴塑料熔融注射技术,研究了胶料粘弹性引起的入口附加压力降和固体壁面滑移速度对充模过程的影响,从而建立了橡胶在薄矩形模腔内充模流动的数学模型。采用有限单元和有限差分混合方法求数值解。通过计算程序预测了充模过程中前锋线的移动及流动场,并根据模拟计算结果,分析讨论了各因素对充模压力的影响。 相似文献