共查询到17条相似文献,搜索用时 93 毫秒
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运用Moldflow软件进行某后盖产品的翘曲变形分析,结合Moldflow软件的翘曲变形分析理论,将影响注塑件的翘曲变形因素分为3类:冷却不均、收缩不均及取向因素。然后针对翘曲变形不同的影响因素提出冷却优化、结构优化、保压优化及反变形设计等优化方案。分析结果表明:提出的这几种优化方案能极大地改善注塑件的翘曲变形,为注塑制品企业在控制产品尺寸、满足装配质量要求、改善翘曲变形等方面提供优化思路及工艺参考。 相似文献
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聚苯乙烯平板翘曲变形的实验研究 总被引:5,自引:1,他引:4
介绍了实验研究聚苯乙烯(PS)注塑平板翘曲变形的实验装置、测量方法、实验方案,并实验分拆两种械具结构、七种成型工艺参数与PS平板翘曲变形之间的关系,归纳实验现象,探讨了翘曲变形测量的误差来源。 相似文献
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傅建钢 《现代塑料加工应用》2019,(3)
以翘曲变形值为对象,针对齿数、模数和齿宽中单个结构参数变化对翘曲变形值的影响进行了研究。结果表明:翘曲变形值随着模数或齿数的增大而逐渐增加;翘曲变形值先随着齿宽的增加而逐渐增大,而后趋于稳定。对模数、齿宽、齿数3个参数两两之间交互作用对翘曲变形值的影响进行了研究。结果表明:模数、齿宽、齿数两两之间交互作用对翘曲变形值的影响具有明显的规律性。运用最小二乘法对分析结果进行拟合,以数学模型形式明确结构参数变化对翘曲变形值的影响趋势。 相似文献
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从制品结构和模具浇口设计、原材料和成型条件的优选诸方面对长条形注塑件翘曲变形进行了系统的试验研究。找到了产生翘曲变形的原因及影响规律,提出了解决的方法。 相似文献
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王鑫;杜林芳;李海梅 《中国塑料》2010,24(12):77-79
针对某座椅塑件的开裂问题,通过Moldflow软件模拟分析,发现塑件在原始工艺条件下呈现一定的向下挠度翘曲,最大可达1.6 mm,又经量化得出塑件厚侧边的磨砂皮纹对塑件的摩擦力可大于14 kN,推知工艺条件和模具结构是导致塑件开裂的原因,并通过优化工艺参数和改变原始模具结构,使问题得到解决。 相似文献
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One major problem that arises in the design of plastic parts, especially those that are fiber reinforced, is the change of shape and dimension as a result of shrinkage and warpage. These material inhomogeneities are caused by flowinduced fiber orientation, curing, poor thermal mold lay-out, and other processing conditions. This paper presents a simulation that predicts shirnkage and warpage of 3-D compression molded fiber reinforced composite parts. The simulation represents the structure with the 3-noded shell elements used in mold filling simulations. The calculated results indicate that fiber orientation strongly affect the final properties, which vary with different chage locations, have a significant effect on warpage. Unsymmetric curing, caused by uneven mold temperatures, could lead to a thermal moment that could possibly help reduce warpage. 相似文献
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针对熔融沉积成型(FDM)工艺易产生翘曲变形的缺陷,建立翘曲变形数学模型,利用正交试验研究了分层厚度、打印温度、托板温度、产品壁厚4个因素对打印试样翘曲变形的影响程度与趋势。结果表明,实验结果与数学模型相印证,得出分层厚度对翘曲变形影响程度最大,打印温度次之,托板温度与产品壁厚影响较小。通过优化FDM成型工艺参数,使打印精度提高了44.4 %,提高效果显著。 相似文献
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Decades ago, the production of packaging with the injection in‐mold labeling (IML) has been established. With this manufacturing technique, label and packaging, both are of the same polymeric material, become inseparably connected during the injection molding process. Because thermal conductivity of the polymeric label material is clearly smaller than that of the metal mold wall, thermal‐induced warpage of injected IML parts or part surface deformation could occur. In this study, structure and warpage behavior of IML parts, which are different from those of conventional molded parts without labels were intensively investigated. It was found that it is the volume contraction difference between label and substrate that forces IML parts to warp to the opposite side of the label. In addition, IML part warpage problem can be coped by varying the mold temperature on the stationary and moving mold platen. By increasing the mold temperature on the label side, the degree of IML part warpage can be reduced with acceptable reduction in mechanical properties. The optimum mold temperature range for particular substrate material, however, was found to be more decisive in maintaining the modulus of elasticity of IML parts than the magnitude of mold temperature difference. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers 相似文献
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海信空调风门叶片的翘曲变形研究 总被引:3,自引:0,他引:3
采用有限元方法研究了温度场、压力场对注塑件残余应力及翘曲变形的影响,重点讨论注塑件的温度场、压力场的计算,以及热塑性小变形理论下的注塑件翘曲变形计算。对影响薄壳塑件翘曲变形的因素(如模具温度、熔体温度、注射速率、保压压力等)进行分析,提出翘曲产生的原因及相应的改进措施。 相似文献