共查询到20条相似文献,搜索用时 93 毫秒
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微齿轮注射成型数值模拟及正交优化 总被引:1,自引:0,他引:1
基于CAE软件采用正交试验设计方案对微注射成型工艺参数如模具温度、熔体温度、注射速率、保压压力、保压时间及冷却时间等与微齿轮制件质量的关系进行了数值模拟,并利用直观分析法和方差分析法对模拟结果进行了分析.结果表明,当模具温度为40℃、熔体温度为225℃、注射速率为10 cm3/s、保压压力为100 MPa、保压时间为1... 相似文献
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应用Moldfolw Plastics Insight(MPI)软件的流动、冷却、翘曲变形模块对洗衣机用聚丙烯面板进行注射成型数值模拟,并对注射成型工艺条件进行了优化.优化后的聚丙烯注射成型工艺参数:熔体温度为240℃,模具温度为70℃,注射压力为32 MPa,保压压力为26 MPa,注射时间为5s,保压时间为30 s... 相似文献
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《塑料工业》2021,(7)
以护目镜为研究对象,基于Moldex3D模流软件进行分析,选用对实验影响最大且可调节性强的7个参数——模具温度、熔体温度、注射速度、注射压力、V/P切换点、保压压力、冷却时间,设计7因素3水平正交实验表。预测护目镜的保压流动残余应力、体积收缩率、热应力、总和条纹级数,从而对工艺参数进行优化。运用极差分析和灰关联度计算,获得的最佳工艺参数为模具温度80℃,熔体温度300℃,注射速度为80 mm/s,注射压力180 MPa,V/P切换点为熔体注射量的97%,保压压力为注射压力的90%,保压时间为8 s,与优化前相比,护目镜的优化后产品的综合质量品质提升了15.4%。 相似文献
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利用Moldflow软件,模拟了双分流道浇注系统下手机后盖零件的翘曲变形。同时,利用六因素三水平正交方法对翘曲变形量进行了分析和优化。结果表明:熔体温度对翘曲变形量影响较大,其次是最大注塑压力、保压方式和注射时间,模具表面温度和冷却时间对翘曲变形影响较小。通过工艺参数的组合,得到最佳的注塑工艺:模具表面温度为40℃,熔体温度为240℃,注射时间为2 s,最大注射压力150 MPa,冷却时间20 s,保压方式为三段保压。在此工艺下进行,得到的翘曲变形量为0.1238 mm,相对于优化前的变形量0.1814 mm,降低了31.8%。 相似文献
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《塑料》2019,(6)
针对汽车车标注塑成型时会产生缺陷的问题,对车标的注塑参数进行分析优化。首先运用Moldflow进行5因素4水平正交实验,然后通过层次分析法和S型隶属函数对3指标下的实验参数进行综合分析,使用极差分析法得到综合分析下模具温度、熔体温度、保压时间与保压压力、注射时间以及冷却时间5个注塑参数的最佳组合及其影响顺序,并通过Moldflow和实际注塑进行验证。结果表明,5因素在3指标下的综合影响程度为注射时间冷却时间熔体温度保压时间与保压压力模具温度。对注塑起主要决定作用的为注塑时间。最佳组合为模具温度55℃、最佳熔体温度230℃、最佳保压时间与保压压力为85%、最佳注塑时间为1. 4 s、最佳冷却时间为18 s。 相似文献
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为了降低翘曲变形对壁厚塑件质量的影响,利用注塑仿真对塑件进行模拟,并结合正交试验的直观分析和方差分析方法对注塑工艺参数进行优化。结果表明,当模具温度70℃、熔体温度220℃、保压压力为注射压力的120%、冷却时间15s、保压时间30s及注射时间4s时,塑件翘曲量最小,熔体温度对塑件翘曲影响最大,模具温度对翘曲影响最小。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献