底座塑料注射模具设计
系 别 专 业 班 级 学 号 姓 名 指导教师 负责教师
机械工程系
机械设计制造及其自动化
B842132 26 吴重志
沈阳航空航天大学北方科技学院
2012年6月
沈阳航空航天大学北方科技学院毕业设计(论文)
摘 要
我国模具工业近几年有很大的进展,注塑成型模具应用越来越广泛,模具CAD/CAM技术的应用水平也上了一个新台阶,但和国外相比仍有较大差距。所以,提高模具设计制造技术的水平有利于我国模具工业的发展。本文记述的是打印机内部支架的塑料模具设计。本设计从优化模具结构入手,合理地设计型腔结构,对型腔组件采用组合式,不但降低了模具的加工难度,而且又提高了模具零件的可互换性,同时方便了模具的维修。另外,在冷却系统设计方面,采用在侧型芯进行冷却的方式,可以使模具均匀有效地冷却,保证了塑件成型后的尺寸要求。为了保证塑件在脱模时能够安全地顶出,模具顶出系统采用多顶杆顶出,并且在不同壁厚和不同尺寸的地方设置不等径顶杆,保证了顶出力的均匀。设计中有效地利用了Pro/E模具设计软件,使整个设计过程简化,同时对模具运动、加工等进行模拟,缩短了模具设计制造周期。
关键词:注射模;支架;侧抽芯;组合式型芯。
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沈阳航空航天大学北方科技学院毕业设计(论文)
Abstract
The mold industry has been growing rapidly in china in recent years .The injection mold is widely used in the plastic industry ,the mold CAD/CAM technology apply level is growing too .But comparing with the foreign, it still has a long distance. So, it is good for the developing of the mold industry in china through improving the mold design. This paper introduces the mold design of the internal printer bracket .This design is on considering the excellent molding tool structure, arranging a reasonable mold hole ,adopting to asectional mole hold , It can lower the process of molding tool consumedly ,and can raise the molding tool spare parts compatibility ,also simplified the maintain of molding tool .Beside ,the aspect of designed in the cooling system , the adoption is in a mold hold of side carry on the cooling-off way ,can made molding tool even to cool off availably, after guaranteeing the request of plastic model in size .For the sake of the assurance plastic .while take off mold can be saftely shed off , this design adopts several poles which have different dia .it can guarantee the lift is even .this design adopts Pre/E software it can make the hold progress .easier and it can express the move of the mold ,reduce the mold design circle.
Keyword: Inject mold ;bracket; side core; combination of mold hold;
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沈阳航空航天大学北方科技学院毕业设计(论文)
目录
1 绪论 ..................................................................... 1 1.1塑料模具工业发展趋势 ..................................................... 1 1.2塑料模具分类 ............................................................. 1 1.2.1注塑成型模具 ........................................................... 2 2 塑件材料与结构分析 ......................................................... 3 2.1 塑件材料及材料的成型特性 ................................................ 3 2.1.1塑件材料选择 ......................................................... 3 2.1.2物理化学性能 ......................................................... 4 2.1.3力学和电气性能 ....................................................... 5 2.1.4热性能 ............................................................... 5 2.1.5 ABS的成型条件 ....................................................... 6 2.2塑件结构分析 ............................................................. 7 2.2.1塑件的几何形状 ....................................................... 7 2.2.2塑件分析 ............................................................. 8 3 注塑机与注塑模的关系 ....................................................... 9 3.1注塑机的选择 ............................................................. 9 3.2注塑机的主要参数 ......................................................... 9 3.3注塑机的参数校核 ........................................................ 10 3.4对注塑机进行调整 ........................................................ 12 4 浇注系统 ................................................................. 13 4.1浇注系统 ................................................................ 13 4.1.1浇注系统设计总则 .................................................... 13 4.2流道设计 ................................................................ 13 4.2.1主流道的设计 ........................................................ 14 4.2.2冷料井设计 .......................................................... 14 4.2.3分流道的设计 ........................................................ 14 4.3浇口设计 ................................................................ 15 4.3.1浇口位置的选择与数目 ................................................ 15 5 成型零部件 ............................................................... 17 5.1成型零部件设计 .......................................................... 17
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沈阳航空航天大学北方科技学院毕业设计(论文)
5.1.1分型面的设计 ........................................................ 17 5.1.2排气系统的设置 ...................................................... 18 5.1.3成型镶块的结构设计 .................................................. 18 5.1.4型芯的结构计算 ...................................................... 18 5.1.5成型零件工作尺寸计算 ................................................ 20 5.1.6型腔壁厚的计算 ...................................................... 20 6 脱模机构 ................................................................. 22 6.1脱模机构选用原则 ........................................................ 22 6.2顶杆脱模机构 ............................................................ 22 6.3浇注系统凝料的脱出和自动坠落 ............................................ 23 6.4侧抽芯机构 .............................................................. 23 7 导向及定位机构............................................................ 25 7.1导向及定位机构的作用 .................................................... 25 7.2导向机构的结构设计 ...................................................... 25 7.2.1导向机构总体结构的设计 .............................................. 25 7.2.2导柱的设计 .......................................................... 25 7.2.3导套的设计 .......................................................... 26 8 冷却系统 ................................................................. 27 8.1冷却系统设计的意义 ...................................................... 27 8.2冷却系统的设计原则 ...................................................... 27 8.3冷却参数计算 ............................................................ 28 8.4冷却回路的布置 .......................................................... 29 9 动作原理 ................................................................. 31 10 参考文献 ................................................................ 32 11 致谢 .................................................................... 33
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