注射模CAE流动模拟技术综述

从MPI(Moldflow Plastics Insight)流动分析结果出发,介绍了注射模CAE模拟软件在制品与模具设计、成型工艺条件选择等方面的应用,说明注射CAE技术在塑料注射成型过程中应用的优势.     

CAE技术在柜机风栅注塑模具设计中的应用

阐述了CAE技术在模具设计与制造中的重要作用及地位,通过应用CAE软件Moldflow/MPI,对柜机进风栅模具注塑成型过程进行流动模拟,分析其填充和保压过程,显示了CAE技术在模具开发过程中对于优化塑料制品设计、优化塑料模设计和优化注射工艺参数等方面所起到的显著作用。     

运用流动模拟技术进行注塑模具设计的的探讨

介绍了注射成型工艺计算机辅助流动模拟技术的特点和应用,并以一多孔类注射成型零件的模具设计为例,说明了CAE系统对于模具结构设计和和优化注射工艺参数所具有的指导作用.     

基于Mold flow软件的PC面板CAE分析

通过应用Mold flow/MPI软件,对电脑面板零件的注射成型过程进行了CAE流动模拟分析,显示了CAE技术在模具开发过程中对于最佳浇口位置与浇口数量的确定、流道系统的布置、塑件设计优化、模具一次试模成功率等方面所起到的突出作用.     

塑料注射模具的并行设计方法

塑料制品注射成型属于一次成型工艺 ,传统的串行模具设计和制造方式 ,造成了对设计经验的过分依赖和模具返修率的提高 ,本文举例介绍了基于流动模拟技术的注射模并行设计方法 ,说明了 CAE对模具结构设计和相关注塑工艺的指导作用。     

基于RP和CAE的注射硬模快速制造技术

结合快速原型技术（RP）和注塑成型流动分析技术（CAE）,提出一种集成的快速制造注射硬模的工艺。在型腔壳中铺设一种特殊形状的金属结构,加快热量的扩散速率,增大模具的强度和硬度。     

基于CAE技术优化注射模设计

综述了CAE技术在注射模设计中的应用及其研究发展概况,对CAE技术在优化注射模设计过程中的基本功能和实际意义做了较详尽的说明,并介绍了注塑成型CAE技术与优化理论相结合,实现注射模具动态优化设计的理论及方法,指出了将CAE分析技术与优化设计理论相结合的方法来优化注射模设计的必然性.     

基于MPI技术的注射成型流动数值模拟研究

以塑料注射成型流动分析软件MPI为工具,对注塑过程中流动数值模拟技术进行了深入研究,建立了塑料熔体流动过程的数学模型。对注射成型模型进行了简化数值计算,以更清楚的认识各物理变量对成型过程的影响,并通过实例说明MPI技术在注射成型流动数值模拟技术的合理应用,用软件预测了温度、压力分布,注射充填型腔计算机模拟,以指导模具设计工作。     

基于Moldflow的注塑件缺陷预测及参数优化

本课题利用Moldflow软件针对播种机典型零件的不同浇口位置方案进行了流动模拟分析,对锁模力大小、翘曲变形等进行了预测,确定最佳浇口方案,并对该方案的注塑参数进行了优化.根据CAE分析结果,通过对塑件的结构形式和材料的注射成型工艺进行正确的分析,设计了一副一模一腔的注射模具.通过CAE模拟计算,可有效地消除模具设计及产品制造成型过程中可能出现的不足,取代传统的反复试模、修模等过程,从而降低产品制造成本,缩短产品开发周期.     

基于Pro/E和Moldflow的注射模CAD/CAE技术

介绍了应角Pro/E软律进行注射模具设计和基于Moldflow软件的注塑成型分析.通过实例,详细阐述了应用CAD/CAE软件进行注射模设计的流程以及设计和分析的过程.表明采用CAD/CAE技术可以缩短产品的开发周期,提高设计质量.     

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 But all current simulation packages for conventional injection molding are no longer applicable to this new type of injection molds, mainly because the property of the mold material changes greatly.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.     

精密注塑模具的注塑成型模拟

在精密注塑模具设计过程中应用计算机辅助分析的方法模拟注塑成型过程,对保证注塑成型产品的质量,提高生产率有极大的优越性。利用MoldflowPlasticInsight(MPI)软件对精密注塑模具的注塑成型过程进行了模拟,分别介绍了注塑参数、浇注系统和冷却系统的设计过程,比较了两套不同设计方案的注塑成型模拟结果。并对影响翘曲变形的各个因素进行了详细的分析。     

基于Web的远程塑料注射成型CAE系统

随着 Internet和电子商务的迅猛发展 ,一种应用软件的新模式——应用服务提供商 (ASP) ,也逐渐凸现。本文构造了一个面向 ASP的基于 Web的远程塑料注射成型 CAE系统 ,详细介绍了系统的构造方法和关键技术     

Textile injection process characterisation by means of a spiral mould

New developments are being carried out within the injection moulding field, such as gas injection, bi-injection, co-injection, sequential injection, compression injection or textile injection processes. These techniques require new developments as they highly modify design and process conditions. In this work, the influence over the plastic material flow of the introduction of different film textiles into the mould is measured. A specific measurement system consisting of a monitorised spiral mould with pressure sensors has been used to measure the influence of different tissues over the mould pressures. As an application of this measurement system, a viscous model is generated to characterise the rheological behaviour of the thermoplastic and textile joint. The viscous model obtained is applied on a conventional CAE tool for the simulation of textile injection pressure results for the different film textiles analysed.     

An Investigation of Wax Patterns for Accuracy Improvement in Investment Cast Parts

In this paper, a methodology is proposed that makes use of computer-aided heat transfer simulation and experimentally derived factors for injection parameters, to predict wax pattern shrinkages in the investment casting process. The focus is on developing techniques for the early determination of optimum injection parameters to be used for wax pattern production so that resulting shrinkage can translate into an overall improvement in accuracy of the investment casting process.     

Virtual plastic injection molding based on virtual reality technique

Virtual reality (VR), as a new technology, is integrated with software systems for engineering, design, and manufacturing. The integration has given a new impetus to the field of computer-aided engineering. This paper presents a research effort aimed at creating a virtual plastic injection molding (VPIM) environment, which is designed and implemented based on techniques such as VR, multidiscipline simulation, and scientific visualization. The VPIM system includes two parts: designing in VPIM and evaluation in VPIM. It is the first system to scrutinize virtual prototype mock-ups of new products, machines and production processes in interactive graphic simulation. During the evaluating phase, coupled to appropriate computer-based reasoning and decision-support tools and driven by data from the real manufacturing environment, a realistic impression of the process of plastic injection molding and manufacture can be achieved and can be changed interactively, and it is possible to thoroughly examine the planned system and eventually detect and remove any defects and inadequacies. The construction approach and key techniques (FEA, virtual assembly, stereoscopic display, a triangulated boundary-representation of an approximating polyhedron, collision detection, etc.) of the system are described in detail. The overall system is a powerful new approach for highly relevant industrial application of VPIM which focuses on the construction and assessment of alternate manufacturing sequences and mold design in an early design stage. Improvement of the design and manufacturing process will lead to better design and reduced development time and cost.     

红外导引头注入式闭环试验的边界能力及一致性

提出一种采用数字图像注入式方法进行红外成像导引头闭环仿真和性能测试的方法。由于注入式仿真试验时红外导引头的红外探测分系统被图像仿真和图像注入设备取代不参与工作,故导引头稳定跟踪回路性能会发生变化。为使注入式闭环仿真试验结果准确可信,建立了评价红外成像导引头仿真试验和实际工作两种情况下稳定跟踪回路性能一致性的指标体系,给出了一致性评估方法。最后,建立了红外成像导引头稳定跟踪回路仿真模型,开发了红外导引头数字图像注入式闭环半实物仿真试验系统并在一导引头实物平台上开展了实验。结合建模仿真与实验验证手段得到了红外导引头数字图像注入式闭环半实物仿真试验系统的边界能力。结果表明:在失调角延时小于73ms,失调角误差小于0.18°,目标运动最大角速度小于1(°)/Hz时,导引头在注入式仿真试验和实际工作两种情况下的稳定跟踪性能可保持一致。实验结果为红外成像制导武器快速形成图像注入式闭环试验鉴定能力奠定了基础。     

塑料注射成形仿真系统HSCAE3D的关键技术

论述了注塑成形过程仿真系统HSCAE3D的关键技术和创新点。实验和实践证明 ,HSCAE3D系统为注塑制品和模具的虚拟制造奠定了坚实的理论和技术基础 ,构成了注塑制品成形质量全面控制的核心技术     

精密注塑成型系统中注塑参数的优化设计

以注塑成型过程仿真获得的注塑过程中模具型腔的压力数据作为注塑机系统仿真的初始压力数据，进而通过系统动力学仿真，解决了设备系统参数的优化配置问题。针对仿真计算结果，讨论了影响注塑成型过程中精密压力控制的主要因素。系统动态特性试验结果表明，注塑成型过程仿真与系统动力学动态仿真相结合的综合分析方法是实现注塑成型参数优化和开发高精度注塑成型设备的一条有效途径。     

基于摩擦模型的挤压铸造机压射机构动态配合

配合间隙是影响压射机构服役和工艺控制的核心要素,为研究压射机构配合间隙,提出一种压射机构的摩擦模型,并基于MSC.MARC软件二次开发将摩擦模型与数值模拟整合,整合摩擦的数值模拟结果与不考虑摩擦的普通数值模拟结果和压射实验结果的对比验证了整合摩擦模型数值模拟的有效性和准确性.对2500 kN压铸机压射机构进行多循环压射...