灯罩注塑模具设计

灯罩注塑模设计

摘 要

通过灯罩注塑模设计，了解注塑模具架构的过程和原理，根据灯罩的结构对制件进行了工艺分析，提出合理的注射成型条件和成型工艺；对塑件的表面精度和表面质量进行了讨论；通过对灯罩注塑模的设计，对模架进行了确定，并设计了导向和定位机构；阐述模具浇注系统和脱模机构的设计方法；详细介绍了凹、凸模，型腔、型芯的结构设计；同时也对排气设计进行了讨论，并且对温度调节系统进行了检验和计算，还介绍了模具的功能结构等等；所设计的模具结构使制件可以可靠稳定的顶出，降低模具的复杂程度和制造成本。 【关键词】 注塑模，顶出机构，结构设计，温度调节，脱模机构

Injection Mould Design for Lampshade

Abstract

Through the design of chimney injection mold，Understanding processing and principle of injection mould. According to the the parts of The chimney for Process analysis, Proposed the reasonable of injection molding conditions and forming process, The surface of plastic parts the precision and surface quality were discussed ，Through the design of injection mould for chimney, make the determination of formwork, And the orientation and locating mechanism design,This mould casting system and demoulding mechanism design method, Detailed introduces the concave and convex mold cavity, cores, the structure design,Also on the exhaust design was discussed, And the working process of the die. Design of the mould structure parts make out reliable and stable. Reduce the complexity of the mould and the manufacturing cost

【Key Words】 Injection mold, The agency, Structure design, Temperature adjustment，Demoulding mechanism

目 录

第1章 绪论 ........................................................................................................................... 7

1.1 模具工业在国民经济中的地位 .............................................................................. 7

1.1.1 我国模具工业的现状 ................................................................................... 7 1.1.2 我国模具技术的现状及发展趋势 ............................................................... 8 1.2 世界五大塑料生产国的产能状况 .......................................................................... 8 第2章 注塑件的设计 ........................................................................................................... 9

2.1 功能设计 .................................................................................................................. 9 2.2 材料选择 .................................................................................................................. 9 2.3 结构设计 ................................................................................................................ 10

2.3.1 对塑件的修改说明 ...................................................................................... 11 2.3.2 壁厚 ............................................................................................................. 12 2.3.3 脱模斜度 ..................................................................................................... 12 2.3.4 加强肋 ......................................................................................................... 13 2.3.5 圆角 ............................................................................................................. 13 2.4 塑件的尺寸精度及表面质量 ................................................................................ 13

2.4.1 尺寸精度 ..................................................................................................... 13 2.4.2 塑件的表面质量 ......................................................................................... 14

第3章 注塑成型的准备 ..................................................................................................... 15

3.1 注塑成型工艺简介 ................................................................................................ 15 3.2 注塑成型工艺条件 ................................................................................................ 15 第4章 模具设计 ................................................................................................................. 17

4.1 塑料配方说明 ........................................................................................................ 17 4.2 分型面的确定 ........................................................................................................ 17 4.3 型腔数目的确定 .................................................................................................... 17 4.4 浇口确定 ................................................................................................................ 18 4.5 模具材料的选择 .................................................................................................... 18 4.6 浇注系统设计 ........................................................................................................ 18

4.6.1 主流道 ......................................................................................................... 18 4.6.2 分流道 ......................................................................................................... 19 4.6.3 冷料穴 ......................................................................................................... 19 4.6.4 浇口 ............................................................................................................. 20 4.6.5 剪切速率的校核 ......................................................................................... 20

4.7 模架的确定 ............................................................................................................ 21

4.7.1 型腔壁厚和底版厚度计算 ......................................................................... 21 4.7.2 模架的选用 ................................................................................................. 22 4.8 导向与定位机构 .................................................................................................... 23 4.9 顶出系统设计 ........................................................................................................ 24

4.9.1 脱模力的计算 ............................................................................................. 24 4.9.2 推杆脱模机构 ............................................................................................. 26 4.9.3 推管脱模机构 ............................................................................................. 27 4.9.4 推板厚度的计算 ......................................................................................... 28 4.10 成型零件工作尺寸的计算 .................................................................................. 28

4.10.1 凹、凸模工作尺寸的计算 ....................................................................... 29 4.10.2 中心距尺寸的计算 ................................................................................... 31 4.10.3 型腔、型芯尺寸的计算 ........................................................................... 31 4.11 排气设计 .............................................................................................................. 31

4.11.1 排气设计原则 ........................................................................................... 32 4.12 温度调节系统设计 .............................................................................................. 32

4.12.1 对温度调节系统的要求 ........................................................................... 33 4.12.2 冷却系统设计： ....................................................................................... 33

结论 ....................................................................................................................................... 39 参考文献 ............................................................................................................................... 40 附录 ....................................................................................................................................... 42 致谢 ....................................................................................................................................... 43