风扇调速旋钮塑料模结构分析及设计【8张CAD图纸和说明书】

塑料工业是当今世界上增长最快的工业门类之一，而注塑模具是其中发展较快的种类，因此，研究注塑模具对了解塑料产品的生产过程和提高产品质量有很大意义。

本设计介绍了注射成型的基本原理，特别是单分型面注射模具的结构与工作原理，对注塑产品提出了基本的设计原则；详细介绍了塑件工艺的分析过程和注射模具浇注系统的设计过程，并对材料要求做了说明。

通过本设计，可以对注塑模具有一个初步的认识，注意到设计中的某些细节问题，了解模具结构及工作原理；通过对Pro/E、UG的学习，可以建立较简单零件的零件库，从而有效的提高工作效率。

 目    录

1  塑件成型工艺性分析·································7

1.1塑件制品结构分析····························································7

1.2成型工艺的分析·······················································7

1.2.1尺寸精度确定·························································7

1.2.2 脱模斜度确定·································································8

1.3 ABS的性能分析·············································································8

1.4 ABS的注射成型过程工艺参数··························································8

1.4.1注射成型过程···········································································8

1.4.2 ABS的注射工艺参数··································································9

1.5 ABS成型塑件的主要缺陷及消除措施················································9

1.6 确定模具基本结构·········································································9

2  分型面结构设计·········································································10

2.1分型面的选择原则·········································································10  

2.1.1分型面的确定·········································································10

2.2确定型腔数量及排列方式·······························································10

2.2.1一般确定型腔数量的三种方法···················································10

2.2.2确定型腔的排布方式·······························································11

2.3注射机型号的确定·········································································11

2.3.1按风扇调速旋钮的注射量计算···················································11

2.3.2选择注射机············································································12

2.3.3注射机有关参数的校核····························································12

2.4浇注系统形式和浇口设计·······························································13

2.4.1主流道的设计·········································································13

2.4.2主流道尺寸的确定···································································14

2.4.3主流道衬套的形式···································································14

2.4.4主流道冷料穴的设计·······························································15

2.4.5分流道的截面形式···································································16

2.4.6浇口的选择原则及位置····························································16

2.4.7排气系统的设计······································································17

2.5确定顶出方式···············································································17

2.5.1顶出方式的确定······································································17

2.5.2脱模力的计算·········································································17

2.6确定冷却系统···············································································19

2.7注射模选材···················································································19

2.8导向与定位结构的设计···································································20

2.9模具的工作过程············································································20

3  成型零部件的设计···································································· 20

3.1确定型腔、型芯的结构和固定方式····················································20

3.2成型零件的尺寸计算······································································20

3.2.1型腔的径向与深度尺寸计算······················································21

3.2.2型芯的径向与高度尺寸计算······················································21

3.2.3塑件的型芯及型腔的成型尺寸标注图·········································22

4  模架的确定和校核···································································· 22

4.1各模板尺寸的确定·········································································22

4.2模架各尺寸的校核·········································································23

5  绘制模具图················································································ 24

6、总结······························································································ 33

7、参考文献······················································································ 33

1  塑件成型工艺性分析

1.1塑件制品结构分析

本设计记为风扇调速旋钮，如图1.1所示塑件的质量要求不允许有裂纹和变形缺陷的；塑件材料为ABS，生产为大批量，塑件公差按模具设计要求进行转换。

该塑件的结构不算复杂，但是产品外表面带有花纹，产品里面也有凹槽，因为此产品是作为风扇调速旋钮使用，大批量生产。所要求的制造精度不高,所以要求模具的制造精度也不高，因要与手部接触，所以保证塑件表面质量即可。