机械5

目录 摘要 前言 一、塑料的工艺性设计.................................................... ........... ............................ ...........7 (1)、注塑模工艺.......................................................... ........... .......................... ............7 (2)、化学和物理特征...................................................... ........... ........................ ..........8 (3)、塑件的尺寸与公差................................................ ........... .....................................7 1、塑件的尺寸与公差......................................... ....................... ..................................8 2、塑件尺寸公差标准.............................................. ......................................................8 3、塑料的表面质量....................................................... .................................................8 二、注射成型机的选择.................................................................. ......... ........................... 9 三、型腔布局与分型面设计......................................................... ....................... ...............9 (1)、型腔数目的确定........................................................................ .............................8 (2)、型腔的布局................................................................. ................................. .......10 (3)、分型面的设计...................................................... .................................................10 四、浇注系统设计................................................ ............................................................11 (1)、主流道设计......................................... ..................................................................12 (2)、主流道衬套的固定...................... .........................................................................12 (3)、分流道的设计........... ............................................................................................13 (4)、浇口的设计.... .......................................................................................................15 五、成型零件的设计.................................. ........................................................................18 (1)、成型零件的结构设计........... ................................................................................18 1、凹模结构设计... .......................................................................................................19 2、型芯结构设计................................................ ..........................................................19 (2)、成型零件工作尺寸计算...................... .................................................................20 1、外型尺寸...................... ...........................................................................................20 2、内腔尺寸...................... ............................................................................................22 六、合模导向机构设计............................................. ................................................23 (1)、导柱结构..................................... ................................................... ................25 (2)、导套结构............................. .................................. ........... .............................25 七、脱模机构的设计............... .....................................................................................26 (1)、脱模机构的设计的总体原则...................... .....................................................26 (2)、推杆设计............... ............................................................................................26 1、推杆的形状....... ..................................................................................................27 2、推杆的位置与布局........................................................... ................................27 (3)、推件板设计的要点....................................... ....................................................27 (4)、开模行程与推出机构的校核..................... ......................................................27 (5)、浇注系统凝料脱模机构................. ..................................................................28 八、塑料成型中缺陷的现象及解决方法.................................... ....................................29 九、射出成型不良与对策.................. ..............................................................................36 总结............................. ............................. ................... ....... ........................41 参考文献.............................. ....................................................................................42