机械5

橡皮泥按压器底座注塑模具设计及型腔加工仿真 DESIGN OF INJECTION MOLDING FOR GLAZE PRESSING PRESSURE BASEMENT AND CAVITY MACHINING SIMULATION 摘要 橡皮泥按压器底座是家庭儿童玩具用品，日益激烈的市场竞争要求企业降低成本、高效率地开发新产品，提高对市场的响应速度。本课题要求根据提供的橡皮泥按压器底座实物进行测绘并完成零件的模型重构，然后利用模流分析软件Moldflow分析塑件、优化工艺参数，通过Creo完成模具整幅3D设计，结合AutoCAD完成模具的2D装配图及零件图的设计。进而改进传统注塑模具设计方法、加快模具设计速率、节约制造成本。 基于Creo建模和Moldflow模流分析的橡皮泥按压器底座注塑模具设计，其方案如下： （1）确定型腔数目和排列方式为一模两腔。 （2）应用Creo软件“自上而下”的设计理念以及其强大的模具设计功能完成橡皮泥按压器底座产品的模型重构、拔模角度分析、分型面设计、型芯型腔、滑块等关键零部件设计；利用EMX插件完成模架加载、浇注系统、冷却系统、侧向抽芯机构、推出机构等机构的设计。 （3）应用Moldflow软件分析，找出塑件的几何中心位置，模拟并计算塑件的翘曲变形，塑件熔体的流动性分析，检验冷却系统的冷却能力。若有较大的成型缺陷采取对工艺参数优化或者变更塑件结构的方法调整。 （4）使用Creo软件进行数控编程，并对型腔进行加工仿真。 关键词注塑模具；橡皮泥按压器底座；模流分析；加工仿真 Abstract Plastici
ne press bases are household childre
n's toys, a
nd i
ncreasi
ngly fierce market competitio
n requires compa
nies to reduce costs, develop
new products with high efficie
ncy, a
nd improve their respo
nse to the market. This project requires the physical modeli
ng of the rubber mud presser base to be provided a
nd the model reco
nstructio
n of the part to be completed. The
n the Moldflow a
nalysis software Moldflow is used to a
nalyze the plastic parts a
nd optimize the process parameters. The whole 3D desig
n of the mold is completed by Creo, a
nd the mold is completed with AutoCAD. 2D assembly drawi
ng a
nd part drawi
ng desig
n. The
n improve the traditio
nal i
njectio
n mold desig
n methods, speed up the mold desig
n rate, savi
ng ma
nufacturi
ng costs. Based o
n Creo modeli
ng a
nd Moldflow mold flow a
nalysis plastici
ne press base i
njectio
n mold desig
n, its program is as follows: （1）Determi
ne the
number a
nd arra
ngeme
nt of the cavity as o
ne cavity a
nd o
ne cavity. （2）Usi
ng Creo software's "top-dow
n" desig
n co
ncept a
nd its powerful mold desig
n capabilities to complete modeli
ng remodeli
ng, draft a
ngle a
nalysis, parti
ng surface desig
n, core cavity, slipper Blocks a
nd other key parts desig
n; use EMX plug-i
n to complete the mold loadi
ng, pouri
ng system, cooli
ng water, lateral core pulli
ng mecha
nism, strippi
ng mecha
nism a
nd other importa
nt system desig
n. （3）Moldflow a
nalysis software, Moldflow, was used to a
nalyze the optimal gate locatio
n of the plastic parts, predict the amou
nt of warpage of the molded parts, a
nalyze the melt flow of the plastic parts, a
nd check the cooli
ng capacity of the cooli
ng system. If there are large moldi
ng defects, adjust the process parameters or cha
nge the structure of the plastic parts. （4）Use Creo software to carry o
n the
numerical co
ntrol programmi
ng, a
nd carries o
n the processi
ng simulatio
n to the cavity. Keywords i
njectio
n mold glaze pressi
ng pressure baseme
nt modular a
nalysis machi
ni
ng simulatio
n 目录 摘要I Abstract II 1绪论1 1.1注塑模具的发展现状1 1.2注塑成型原理及工艺过程1 1.3 Creo在模具设计中的应用1 1.4注塑模具设计CAE技术简介2 2塑件成型工艺性分析3 2.1塑件模型重构3 2.2脱模角度分析3 2.3塑件材料的选择4 2.4塑件的工艺性4 2.4.1表面质量4 2.4.2精度等级5 3模具结构形式的确定及注射机的选择6 3.1型腔数目的选择及排列方式的确定6 3.1.1型腔数目的选择6 3.1.2型腔排列方式的确定6 3.2分型面的确定7 3.3体积质量的计算8 3.4注射机的选择8 3.5注射机相关参数的校核9 4基于Moldflow的模流分析10 4.1 Moldflow软件简介10 4.2模型的导入与网格的划分、处理10 4.3塑件的最佳浇口位置分析12 4.4塑件的翘曲分析12 4.5塑件的流动性分析12 4.5.1充填时间和流动前沿温度12 4.5.2锁模力和螺杆速度13 4.6塑件的冷却分析14 4.7分析结果14 5脱模、浇注、冷却及排气系统的设计15 5.1脱模机构的设计15 5.1.1脱模力的计算15 5.1.2塑件推出机构15 5.1.3凝料脱出机构16 5.2浇注系统设计原则17 5.3主流道、分流道、浇口设计17 5.3.1主流道设计17 5.3.2分流道设计17 5.3.3浇口设计18 5.4冷却系统的设计19 5.4.1模具温度的控制方法19 5.4.2冷却水路设计19 5.5排气系统的设计20 5.5.1设计原则20 5.5.2推杆排气设计20 6成型零件、结构件的设计及注射机校核22 6.1侧向抽芯机构的设计22 6.1.1斜导柱与抽芯距的设计计算22 6.1.2滑块的压块、楔紧与导向装置的设计22 6.2模板尺寸的确定23 6.2.1模仁尺寸的确定23 6.2.2定模板和动模板尺寸的确定24 6.2.3模具高度尺寸的确定24 6.3导向装置的设计25 6.4注塑机的校核25 6.4.1注射量的校核25 6.4.2模架外形尺寸的校核26 6.4.3模架高度的校核26 6.4.4开模行程的校核26 7基于Creo的型腔加工仿真27 7.1设置制造数据27 7.1.1选择加工机床27 7.1.2设置刀具数据28 7.2加工仿真28 7.2.1粗加工28 7.2.2精加工29 8注塑模具总装设计31 结论33 致谢34 参考文献35