机械5

枫叶形塑料果盘的注塑模具设计 摘要 对塑料果盘的注射模结构采用侧浇口的进料，一模两腔的模具结构。材料采用性能良好的聚乙烯(PE)。依据给定的塑件资料和图片，通过对注射模具的型芯上端面加工工艺路线设计，计算夹具夹紧力及切削力，工序专用夹具设计、完成注射模具。最后，在CAD中，绘制注射模具型芯的夹具图。 关键字：塑料果盘；注射模；侧浇口；一模两腔 Abstract The i
njectio
n mold structure of the plastic fruit tray adopts the mould with side gate feed a
nd a mold with two chambers. The material is polyethyle
ne (PE) with good properties. Accordi
ng to the give
n materials a
nd pictures of plastic parts, the clampi
ng force a
nd cutti
ng force of the clamp are calculated by desig
ni
ng the processi
ng route of the upper e
nd face of the core of the i
njectio
n mold, a
nd the special clamp for the worki
ng procedure is desig
ned a
nd the i
njectio
n mold is completed. Fi
nally, i
n the CAD, draw the i
njectio
n mold core fixture diagram. Key words: plastic fruit tray; i
njectio
n mold; side gate; o
ne mold two cavity. 目录 摘要I Abstract II 前言III 1.绪论1 2.塑料成型的工艺性分析1 2.1塑性的分析1 2.2 PE塑料的性能分析2 2.3 PE的注射成型过程及工艺参数2 3.拟定模具的结构形式和选取注射机3 3.1分型面位置的确定3 3.2型腔数量和排列方式的确立4 3.3注射机型号的确定4 4.浇注系统的设计6 4.1主流道的设计6 4.2分流道的设计7 4.3浇口的设计8 4.4校核主流道的剪切速率9 4.5冷料穴设计及计算9 5成型零件结构设计及计算9 5.1成型零件结构设计9 5.2成型部件钢材选用10 5.3成型部件工作尺寸计算10 5.4计算成型零件尺寸及动模垫板的厚度12 6.脱模推出结构设计13 6.1计算脱模力13 6.2确定推出方式13 7.模架的确立14 8.排气槽设计14 9.冷却系统设计14 9.1冷却介质15 9.2冷却系统简单计算15 10.定位和导向结构设计16 11.夹具设计16 结束语18 致谢19 参考文献20