注塑冷却分析模内复膜数学模型建模

由于模内复膜工艺是在模具内将塑件表面增加一层薄膜,本文利用注塑冷却分析将模具型腔表面离散为平面三角单元的特点,将薄膜和塑件视为两层具有良好接触的平板,对于每一层平板,建立第一类边界条件下一维非稳态导热模型,并将该导热模型应用到冷却分析中,完成了模内复膜冷却分析的建模.     

塑件表面模内装饰技术应用现状分析

简要介绍了塑件表面模内装饰技术的分类及其工艺流程,分别针对模内镶标注塑(IML)、模内镶件注塑(IMF)和模内转印(IMR)等工艺的成型方式、工艺特点、适用范围等进行了比较和说明。重点论述了装饰膜的材料和结构,并列举了部分装饰膜的应用;同时讨论了模内装饰技术对装饰膜塑胶片材和油墨的要求。最后,列举了目前国内外模内装饰技术中较为新颖的实际应用和工艺方法,展望了未来塑件表面模内装饰技术的发展趋势,并给出了一些建议。     

注塑制品表面模内装饰工艺的质量分析与对策

介绍了注塑制品表面模内装饰工艺及其应用,列举了影响模内装饰注塑制品质量的主要因素和工艺要点,同时针对该项技术在生产过程中常见的质量问题做出了分析并提出了改善措施,最后阐明了注塑制品表面模内装饰工艺的发展趋势.     

影响注塑模内贴标成型因素及产品设计探讨

简介了注塑模内贴标成型原理、工艺和应用发展趋势,根据实际产品的应用案例分析了注塑模内贴标在塑料产品成型过程中的影响因素和工艺要点,提出了模内贴标塑料模具的特点及其设计的一般原则,分析了模内贴标产品的常见缺陷,并给出了改善措施.     

基于Moldflow的模内装饰注射成型分析

介绍了模内装饰技术,以某一电子塑件为例,阐述了Moldflow软件模内装饰注射成型分析过程.通过与无薄膜塑件的分析比较,得出了模内装饰注射成型在充填、温度分布、翘曲等方面的特点,对模具设计和工艺有一定参考.     

全部在模内进行

多年来,在模内进行模内组装、模内装饰、模内贴标和模内修饰等在注塑中已经成为一种趋势。由于这个整体趋势是“在模内进行”这一口号的必然结果,因此,工艺和技术上的新变化在几平每一个重要的塑料贸易展会上都会出现。NPE2012展会便是一个了解外面发展情况的好时机,可以从中看到行业发展的方向以及在未来几年内可能会出现的东西。     

模内贴标成型工艺及其产品设计

介绍了模内贴标成型工艺技术原理和应用,根据实际产品的设计经验,提出了模内贴标工艺在塑料产品应用过程中需要控制的工艺要点和模内贴标塑料模具的特点及其产品设计的一般原则;分析了模内贴标产品的常见缺陷,并给出了改善措施。     

汽车功能键触摸盖IMD高压成型工艺与模具设计

针对汽车内饰功能件模内装饰(IMD)成型的需要,设计了该功能件的IMD成型工艺方案,完成了两副关键设备的结构设计.IMD成型工艺包含膜片文创图案丝印、膜片预成型、膜片冲裁、膜片模内注塑等环节.针对膜片预成型工序设计了一种膜片高压预成型模具;针对模内注射成型工序,设计了一种两板两腔单次分型侧浇口注塑模具.实践证明,该成型...     

吹塑模内贴标成型因素对其产品质量的影响

介绍吹塑模内贴标的成型原理和成型工艺,提出贴标过程中出现气泡是影响质量合格率的主要原因.并着重对吹塑模内贴标成型工艺中产生气泡的因素进行探讨,给出相关问题的改善措施和正常生产所使用的工艺参数.对在模内贴标时出现气泡的桶给出新的可行的修复方法.     

模内贴箔装饰的自动化生产

详细介绍了一种新型装饰工艺－模内贴箔工艺的自动化过程及生产要求。     

嵌件注射成型工艺的分析与优化

以某品牌轿车车身B柱外饰件为例,分析了嵌件注射成型工艺中熔合纹和翘曲缺陷产生的原因;并通过数值模拟和实验对比,提出了预测和修正制品缺陷的思路和方法.     

注塑模具结构中的镶件设计

介绍了注塑模具结构中镶件的设计,讲述了注塑模具在结构设计过程中的镶件适用范围、主要形式、定位方式以及设计要点。     

The simulation and experimental study of granular materials discharged from a silo with the placement of inserts

The simulation method of DEM and experimental method are used to investigate the flow pattern of the filling and discharging process for two-dimensional plane silos. Two kinds of inserts (conical insert and BINSERT®) are used in the silo to change the flow fields of the silo. The placement of inserts improves the flow behaviors of funnel flow type to mass flow type during discharging. The wall normal stresses are influenced by the change of the flow type. The effects of using differently shaped inserts on the flow pattern and wall stress are analyzed in this study. The controlling parameters include the silo half-angle, the orifice width, the shape of the insert and the properties of the granular materials. The simulation and experimental results are in good agreement.     

Novel synthesis of ZrO2-SiCw-C insert ring materials for slide plates

To reduce the cost and firing temperature of traditional ZrO₂ insert rings, the new ZrO₂-SiC_w-C (w-whisker) insert ring materials were successfully synthesized using ZrO₂, Si, graphite powders as starting materials, and phenolic resin as binder. The effects of amount of Si powder addition (5, 8 and 11 wt%) and firing temperatures (1100 °C, 1200 °C and 1400 °C) on the phase composition, microstructure and properties of as-obtained products have been investigated. The results show that Si reacts with C or CO at high temperature to form SiC_w, which intersperses in the ZrO₂ material to develop an interlocking network structure, resulting in strengthening effect and leading to an increase in the strength of the composites. The composites have good oxidation resistance due to the formation of some glass film on the sample surface. The optimum firing temperature is 1200 °C, which is much lower than that of pure ZrO₂ material (>1700 °C). The as-prepared ZrO₂-SiC_w-C materials possess good properties, making good prospects for fabricating insert rings of slide plates.     

基于Moldflow模拟分析整流器下盖的模具设计

对整流器下盖的模具设计解决了分型面的选择、镶件的结构、侧浇口位置确定、冷却系统的布局、塑件浇注系统布局等问题。同时,为了确定整个模具在注塑过程中的问题,通过Moldflow模拟分析软件对填充、浇口、排气、注塑成型时间等进行分析和优化。     

模流分析在含嵌件制品优化设计中的应用

采用Moldflow MPI 6．0软件对带有金属嵌件的手机外壳进行变形分析,通过优化嵌件的设计,可有效地减小手机外壳的变形,为用户提供最佳的设计方案。     

Film insert molding as a novel weld‐line inhibition and strengthening technique

Specimens with weld lines were produced via conventional and film insert molding techniques using two types of materials as the substrate resin, i.e. a polycarbonate/acrylonitrile‐butadiene‐styrene (PC/ABS) blend and glass fiber‐filled polycarbonate (PC‐gf). The formation and morphology of the weld line region was assessed with and without the presence of 0.5‐mm‐thick PC film inserts. The weld line formation and characteristics were found to be dependent on the extent of interaction between the injected resin and the mold surface or the film insert. Better interfacial interaction between the substrate and film led to the distortion of the weld line orientation, which significantly enhanced the mechanical properties of the weld line. The incorporation of glass fibers into the substrate resin would usually reduce the resistance of the weld line towards tensile, flexural and impact loadings. However, with the attachment of film inserts, the mechanical properties of the weld line region have significantly improved, even with the presence of rigid fibers. Upon examination of tensile and impact fracture surfaces of film insert specimens, a unique orientation of fibers across the weld line (parallel to the flow direction and perpendicular to the weld line) could be observed at regions directly under the film. The combination of favorable properties from the unique fiber orientation and distortion of the weld line, as well as the ability of the film to effectively dissipate forces towards a larger area, have synergistically contributed towards the mechanical property enhancement of the weld line region in film insert moldings. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers     

磁性金属在塑料模设计中的定位应用

针对某一塑料件产品的模具设计过程中遇到关键尺寸难于控制的问题，采用磁性金属棒对模具中的塑料嵌件进行定位。实际应用表明，该设计能很好地控制产品的尺寸精度；显著降低废品率，取得了很好的经济效益。     

汽车灯盒注射模设计与工艺分析

通过对汽车灯盒的产品结构和注射成型存在的工艺问题研究,选择高聚合度聚氯乙烯(HPVC)的成型工艺参数,确定了该塑件的注射模结构为一模一腔。设计了分别装在动模和定模的多个镶块的抽芯机构,自动顶出机构,浇注系统和温度控制系统。结果表明:多镶件抽芯、自动顶出、顺序脱模机构解决了较复杂盒体的多凹槽成型问题。     

气辅注射模塑制件和模具的设计特点及原则

本文介绍了一种新型成型工艺－气辅注射模塑制件和模具的设计特点及一般原则，并通过与传统注射模塑制件和模具设计的比较，阐述了气辅注射模塑与传统注射模型在制件和模具设计上的差别以及气辅注射模塑的优越性。