塑胶件结构优化设计

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说明：

加强筋的拔模角一般取 0.25-2 度 ，塑件表面有皮纹或是结构复杂的应加大拔

模角！可达到 2 度,这是因为形状复杂的制品脱模阻力大！如拔模角不够大时会

出现拉花现象！

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在塑件结构设计中应避免在料流方向的尖角！这样会产生局部应力且有注塑缺

陷！第二种为改良方案，消除了尖角！

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这也是尖角问题，

第二种为改良方案！加了圆角，圆角的好处是避免集中。提高塑件的强度，改善

塑件的流动性！圆角半径的大小一般外 R 取 2t( 壁厚 ) ，内 R 取 0.5~1t.

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塑件加强筋的设计！基本厚度等于 0.5 倍壁厚 , 高度小于等于 3 倍壁厚 , 圆角大

于等于 0.25~0.4 的壁厚 , 拔模角大于等于 0.5 度 , 间距大于 2 倍的壁厚 设计原

则：

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6 设计原则:

1， 加强筋应布置在塑件受力较大之处，以改善塑件的强度！

2， 加强筋应作对称分布，避免塑件局部集中

3， 加强筋应尽可能设计的矮一些！

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7 沉孔的设计

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11 自攻螺丝柱子的设计,柱子的直径等于 3 倍底孔的直径

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15 凸台设计

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This file was downloaded from goeway.cn—Professional Mechanical Design Reference Sitehttp://www.goeway.cn/download/index.asp?Fe987nale287g10F

This file was downloaded from goeway.cn—Professional Mechanical Design Reference Sitehttp://www.goeway.cn/download/index.asp?Fe987nale287g10F

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This file was downloaded from goeway.cn—Professional Mechanical Design Reference Sitehttp://www.goeway.cn/download/index.asp?Fe987nale287g10F