【摘要】 从气体辅助注射成型工艺的角度探讨了气体的延迟时间和第一段压力这两个关键的参数对气槽的影响进而对产品翘曲变形的影响、结果表明:虽然通过使用气体辅助注射成型技术能改善产品变形,但并不能完全消除变形;造成产品变形的原因和机理十分复杂,只有进行从设计到工艺的全方位考察才能有效的控制变形;气体手指效应也是造成产品变形的一个重要因素;工艺上可以通过调整延迟时间和气体压力来减小产品的变形量。更多还原

【Abstract】 Influences of two key gas-assisted injection molding parameters, gas delay time and the first processing pres sure, on gas channel, which will result in warpage of the part, are explored. Results show that gas assisted injection molding can inhibit but not avoid warpage of the part. Reasons and theories of part warpage are very complicated. Fin ger effect of gas is an important factor that can lead to warpage. Adjusting delay time and gas pressure can reduce the warpage of the part.更多还原