1) micro injection molding
微注塑成形
1.
Based on the analyses of wall slip mechanism of polymer melt flowing,the effects of wall slip on melt filling flow behavior in micro injection molding were investigated.
分析了微尺度下熔体壁面滑移机理,研究了微注塑成形中壁面滑移对熔体充模流动行为的影响。
2) injection molding
注塑成形
1.
By injection molding experiments, shrinkage characteristics of convex, con cave, square and fan-shaped parts are investigated.
设计制作了一套一模四腔的模具(包括正方形、凸形、凹形和扇形等4种形状制品的型腔),通过注塑成形实验,来确定这几种特殊结构制品的收缩特性。
2.
The influence of the different models on the injection molding an alysis is also studied.
目前共有4种分析模型应用于注塑成形CAE系统:1维分析模型;2·5维中面分析模型;2·5维双面网格分析模型;3维实体分析模型。
3.
In this paper,the application and development of artificial neural network(ANN) in injection molding industry and injection molding technology were summarized.
对人工神经网络技术在注塑成形研究中的主要应用和发展概况进行了综述,并将神经网络技术与正交试验设计方法、CAE模拟技术相结合,建立了注塑工艺参数与制品翘曲变形量关系的BP神经网络模型。
3) plastic injection molding
注塑成形
1.
In order to analyze the plastic injection molding process of the 90° elbow,best gate location,molding window and experimental design(DOE) methods from Moldflow are employed.
结合Moldflow软件的最佳浇口、成形窗口、试验设计(DOE)等分析功能,分析90°塑料弯管的注塑成形工艺。
4) micro injection molding
微注塑成型
1.
Simulation Analysis and Experiment Research of Process in Micro Injection Molding;
微注塑成型工艺的模拟分析与试验研究
2.
The theoretical model of wall slip in microchannels was built to character melt slip behaviour at filling stage in micro injection molding on the basis of the primary theories of macroscopic melt flow and the investigation of the mechanisms of wall slip.
基于宏观熔体流动的基本理论及其流动过程中壁面滑移机理的分析,针对微注塑成型模具中熔体充模流动时的壁面滑移行为,建立了微小通道中高聚物熔体流动的壁面滑移理论模型。
3.
On base of the theory of polymeric melt filling flow in micro injection molding, the mechanism of convectional heat transfer for polymeric melt was discussed,and the effects of convectional heat transfer on the melt filling flow in micro injection molding were investigated with considering the model of convectional heat transfer coefficient.
在熔体流动理论的基础上,通过分析熔体的对流传热机理,并引入对流换热系数模型,对微注塑成型中对流换热系数对熔体充模流动进行了研究。
5) micro forming
微塑性成形
1.
Research situation and development trends in micro forming;
精密微塑性成形技术的现状和发展趋势
2.
The existing means of finite-element method is based on the classic forming theory, so it needs to be improved to simulate the micro forming.
传统有限元分析方法是建立在经典塑性理论基础之上的,需要改进才能对微塑性成形过程进行模拟。
6) microforming
微塑性成形
1.
Research on Microforming Mechanism and Precision Micro Bulk Forming Apparatus;
微塑性成形机理及精密微塑性体积成形装置研究
2.
Size effects, in evidence in metal microforming processes, either in form of "smaller is weaker" or in form of "smaller is stronger" are studied in this paper.
介绍了金属微塑性成形过程中的两类尺度效应,即"越小越弱"和"越小越强",探讨了产生不同尺度效应的原因;介绍了能够反映尺度效应的物理模型及相应的数值模拟技术,指出了各类模型和数值技术面临的困难,预测了该研究领域的发展方向。
3.
The size effects problem occurring in miniaturization of microforming is inevitable,which results in the different characteristics such as friction and lubrication comparable to the conventional forming processes.
微塑性成形中由于尺寸微型化出现了"尺度效应",导致了摩擦润滑呈现出不同于传统宏观尺寸的特点,利用"开口和封闭润滑穴"模型解释了微塑性成形中的摩擦问题。
补充资料:主要射出成形材料成形时应注意事项
■主要射出成形材料成形时应注意事项
品 名 注 意 事 项
PVC
聚氯乙烯
1. 产品种类范围非常广(硬质、软质、聚合物等),成型条件各有不同,从熔融至分
解之温度范围很小,尤须注意加热温度。
2. 附着水分少,但成型周期尽可能减少(50℃~60℃热风干燥)。
3. 成型机方面,与材料直接接触的部位须电镀或采用不锈钢以防热分解所产生的盐酸
侵蚀。射出压力2100kg/cm2程度。
4. 所有塑料当中必须是细心注意温度调节。
5. 浇口附近易产生流纹,故射出操作后,柱塞不要后退使浇口充分固化后再瞬间退后为宜。
6. 加热之初温不宜高,特别注意熔融情形。第二级加热温度较高,且尽可能使成形周
期缩短,比较安全。
PA
聚醯胺树脂
1. 成型温度比其它材料高,故采用油加热的成形机较适当。
2. 吸湿性大,必须充分干燥。水分对成型品的品质影响甚大(80℃热风干燥约5~6小时)。
3. 须退火以消除内部歪斜。
PP
聚丙烯
1. 同PE,但成形温度必须较高。熔融温度170℃,超过190℃则流动性大增,则毛边增加,
易产生接缝及凹入情形。
PC
聚碳酸脂
1. 吸湿性比尼龙小,但若有些微之水分存在则成型品产生其它色泽或气泡,故必须密封
干燥同时成形时也须预备干燥(120℃之温度4小时)。
2. 加热温度超过320℃时则产生热分解,成品变色,故特别注意温度调节,又成型时的温度调节也非常重要,须特别注意其最低温度、最低时间。
3. 须退火以消除内部歪斜(130℃~135℃,1小时程度为准)。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条