地垫注塑模具设计

从零件图的结构要素、注塑零件尺寸精度与形状位置精度等方面对地垫零件进行了注塑工艺性分析.对地垫塑料零件的注塑模具结构进行工艺性设计.本着在满足地垫注塑要求的情况下,模具结构尽量简单,以缩短模具制造周期,便于以后维修保养的原则,设计中将模具的基本结构确定为两板式单腔模具.并对地垫注塑模具的分型面、合模导向装置、主要工作零件结构、零件脱模推出装置、浇注系统进行了分项单元设计,并设计绘制了地垫注塑模具的总体结构图.     

注塑零件在不同流道下冷却温度场的分析研究

为了确定出不同类型冷却流道对于注塑零件温度场影响,针对特定注塑零件设计出模具结构,之后采用有限元软件对不同流道模型进行温度场仿真计算,比较不同流道对冷却温度场的影响。研究结果表明,注塑模具采用弯曲流道设计能冷却流道下凝固温度场状态,通过设计出三种不同类型的流道,并通过仿真软件进行迅速带走热量,还能增大与固体域边界的接触面,进而加快注塑零件冷却,避免了因温度过高对零件结构造成损坏。     

基于Web的三层结构注塑模具CAPP系统

提出面向注塑模具的CAPP系统开发方法。即以归纳出的抽象零件而建立的工艺模板为基础,开发了基于网络 和数据库、具有企业集成层、项目管理层和工艺设计层的注塑模具CAPP系统。该系统能够满足注塑模具零件特别是非 成型零件的工艺设计要求。     

基于钢筋支架注塑模具设计

以建筑行业中使用的钢筋支架为例,根据钢筋支架的结构特点,利用UG软件对该制品的注塑模具进行了三维结构设计,阐述了钢筋支架注塑模具的设计过程,并对模具的调温系统及模具的闭合高度进行了设计和计算,拟定该零件模具的总体设计和注塑型腔的设计方案,确定了合理的模具结构。该模具提高了钢筋支架的生产效率和生产质量。     

基于微机系统的注塑模具CAD系统开发

对注塑模具CAD系统的开发进行了初步的尝试。按照建立注塑模具CAD的目标要求 ,着重对菜单的自动加载、参数化自动绘图、实现零件装配、动态演示等功能进行了编程和调试。     

基于逆向工程的注塑模具快速设计

采用逆向工程技术可显著提高模具设计效率。在重构零件模型的过程中,先对零件的曲面特性进行分析,然后划分若干曲面片,对每一个曲面片分别进行重构,再进行重新组合,产生过渡曲面,从而完成整个曲面的重构。利用重构好的曲面模型,进行零件的CAD实体模型的造型。最后利用该CAD实体模型,设计出注塑模具。结果表明,重构模型的精度可以满足零件的注塑模具的设计要求。采用该方法,可以实现模具的快速设计,缩短新产品的开发设计周期。     

CAE技术在减振器注射模设计中的应用

MoldFlow和Plastic Ad-visor在注射成型中的应用1.注射模具设计的传统方法与C A E技术图1和图2给出了利用传统方法设计注塑模具和利用C A E技术设计注塑模具特点和差异。从中可以看出,利用传统方法设计注塑模具,设计成功与否在很大程度上依赖设计者的经验,而且对复杂零件浇口位     

手机喇叭塑胶支架模具的设计与调试

主要介绍了手机喇叭支架类模具设计前期对产品肉厚问题、分型线的选择、模具结构的规划、顶针设计、排气设计等关键要素的分析。从模具结构设计、模具零件加工及注塑成型工艺几个容易出问题的环节进行详细的阐述。总结出的经验教训,可为模具行业的工程师提供参考。     

塑料面盖注塑模具成型零件数控编程与加工

在进行注塑模具数控加工时,成型零件的加工极为重要,其加工质量的优劣直接影响到模具后续成型产品的质量。文章以塑料面盖注塑模成型零件之一型腔的数控加工为例,从模具零件的数控加工工艺策略、运用CAM软件编程加工的方法与技巧等方面进行了详尽的论述。     

注塑模具计算机辅助设计的发展与应用

介绍了注塑模具CAD技术的特点、优越性、发展现状、不足以及其发展趋势。同时简要介绍了注塑模具冷却系统、顼出系统、模具结构和成型零件工件尺寸的计算机辅助设计的步骤及程序。最后简要阐述了注塑模具CAD所解决的主要问题。     

Effect of mold temperature on motion behavior of short glass fibers in injection molding process

In injection molding process, the mold temperature can strongly affect the fiber orientation and distribution state in plastic parts. The fiber orientation behavior is discussed, and a model is used to describe the layered structure in injection parts. By studying the injected specimens, the fiber distribution and the layered structure in the part are illustrated and a variation of the fiber distribution along with the increasing of the mold temperatures is also demonstrated. The surface morphologies of the fiber-reinforced specimens at different mold temperatures are analyzed which are used to study the effect of the mold temperature on the fiber motion process of the resultant parts. Results show that in proper mold temperature, the fibers can be completely covered in polymer matrix and the mold temperature can greatly affect the part surface quality.     

基于UG的内螺纹瓶盖注塑模设计

UG MoldWizard是UG系统的一个独立的智能化设计注射模具的模块,它运用知识嵌入的基本理念,按照注射模具设计过程的一般顺序来实现模具设计的整个过程.在本次内螺纹瓶盖的设计中,充分体现UG在注塑模设计中的高效和快捷.通过对内螺纹瓶盖工艺分析,巧妙地采用镶块成型内螺纹和项出塑件,从而简化模具结构.并对模架、浇注系统...     

齿轮齿条斜抽芯机构注塑模设计

根椐塑料垫的结构特点,设计了由对称布置在模具内部的四组齿轮齿条斜抽芯机构、推杆推出机构等主要部分组成的四型腔单分型面注塑模。介绍了注塑模主要零件的结构设计,注塑机的选择,模具的校核和工作原理。设计的模具结构紧凑、合理,工作可靠。     

Integrated simulation of the injection molding process with stereolithography molds

Functional parts are needed for design verification testing, field trials, customer evaluation, and production planning. By eliminating multiple steps, the creation of the injection mold directly by a rapid prototyping (RP) process holds the best promise of reducing the time and cost needed to mold low-volume quantities of parts. The potential of this integration of injection molding with RP has been demonstrated many times. What is missing is the fundamental understanding of how the modifications to the mold material and RP manufacturing process impact both the mold design and the injection molding process. In addition, numerical simulation techniques have now become helpful tools of mold designers and process engineers for traditional injection molding. But all current simulation packages for conventional injection molding are no longer applicable to this new type of injection molds, mainly because the property of the mold material changes greatly. In this paper, an integrated approach to accomplish a numerical simulation of injection molding into rapid-prototyped molds is established and a corresponding simulation system is developed. Comparisons with experimental results are employed for verification, which show that the present scheme is well suited to handle RP fabricated stereolithography (SL) molds.     

薄壁塑件注塑成形特性的试验研究

设计制造了一可成形薄壁塑件的模具,利用正交试验方法(田口方法)进行充模试验,研究各工艺参数(注射速度、注射压力、熔体温度、注射量和模具温度等)对薄壁塑件注塑成形充模过程的影响。研究结果表明:模具温度对薄壁塑件的填充起决定性作用,注射压力和注射量是影响薄壁塑件成形的重要工艺参数,注射速度与熔体温度之间的交互作用对薄壁塑件成形的影响显著。     

Development of high gloss plastic for injection molding by utilizing wollastonite(CaSiO<Subscript>3</Subscript>) and talc fillers

The gloss of plastic products is an important factor with which customers rapidly and directly decide the value of product. In general, these high-gloss plastic molded parts are produced through the injection molding of glass fiber-added plastic resin using a high temperature mold with the fine surfaces like glass. However, making the mold temperature higher causes the cooling time of injection molding longer, and the prolongation of cooling time leads to the extension of whole cycle of injection molding process. In order to resolve this problem, we developed a resin which makes the high-gloss injection modeling possible at low mold temperature by replacing conventional glass fiber filler with wollastonite filler. The tensile strength, flexural strain, impact strength, flow rate, gloss level and so on of the developed resin were tested with respect to the content of wollastonite. The results show that most of the properties except for the flow rate and gloss level are reduced in the newly developed resin. However, the decline in these properties was not enough to limit the use of new resins. In the gloss level test, as for the equal gloss of injection molded parts, the mold temperature for the developed resin was 30 °C lower than the mold temperature for the conventional resin. The difference of gloss between two injection molded parts using two different resins has been confirmed from the surface inspection of injection molded parts by SEM (scanning electron microscope).     

基于CAE分析的塑件3D制造技术的研究

为提高塑件生产质量,研究了CAE技术应用于注射模设计,论述了该技术的优点和意义;结合具体塑件,在浇注、冷却系统确定的前提下,CAE分析能够模拟注射过程,以流动、冷却和翘曲分析为例,分析结果以3D彩图形式给出,形象直观.通过应用CAE分析克服了以往只有在试模中才会发现的问题,缩短模具设计、制造周期,优化了注射模设计,提升了塑件质量.     

基于Pro/E的扣板模具设计与制造

文章叙述了扣板塑件的注射成型工艺分析,扣板模具的Pro/E模具设计、模具的虚拟装配干涉检测,模具零件加工工艺分析,复杂模具零件的数控加工程序的自动生成、加工仿真等。     

注射成型模具维修工艺探究

为了提高注射成型模具的维修水平,对维修工艺做了深入的探索,阐述了模具在使用过程中的损坏情况,讨论了维修工艺规程的编制,分析了编制数控设备加工的程序,研究了零件维修的加工方法和维修过程中的检验,并探讨了注射成型模具的维护、保养及报废问题。     

Profile modification��a design approach for increasing the tooth strength in spur gear

This work applies modular design concepts to designating beverage-container injection molds. This study aims to develop a method of controlling costs and time in relation to mold development, and also to improve product design. This investigation comprises two parts: functionality coding, and establishing a standard operation procedure, specifically designed for beverage-container injection mold design and manufacturing. First, the injection mold is divided into several modules, each with a specific function. Each module is further divided into several structural units possessing sub-function or sub-sub-function. Next, dimensions and specifications of each unit are standardized and a compatible interface is constructed linking relevant units. This work employs a cup-shaped beverage container to experimentally assess the performance of the modular design approach. The experimental results indicate that the modular design approach to manufacturing injection molds shortens development time by 36% and reduces costs by 19??23% compared with the conventional approach. Meanwhile, the information on modularity helps designers in diverse products design. Additionally, the functionality code helps effectively manage and maintain products and molds.