气体注射控制参数对聚合物气辅共注成型过程影响的试验研究  

Experimental Study on the Influence of Gas Injection Controlling Parameters on a Gas Assisted Co-injection Molding Process

作　　者：周国发[1] 刘岑[1] 

机构地区：[1]南昌大学环境与化学工程学院,江西南昌330031

出　　处：《南昌大学学报（工科版）》2008年第4期316-320,共5页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(20274016);江西省教育厅科技攻关项目(S00123)

摘　　要：对先进的气辅共注成型工艺进行了实验研究,系统研究了气体保压时间和气体注射延迟时间对气辅共注成型过程的影响规律,并基于理论分析揭示了其影响机理。研究结果表明:随着气体保压时间增长,气体的二次穿透增强,导致气体的穿透深度和穿透宽度均增大,而随着气体注射延迟时间延长,气体穿透深度增大,穿透宽度减小。然而这2个参数对芯层熔体的穿透影响不明显。研究还表明增加气体注射延迟时间有利于气体的穿透,但易出现指进现象和气体穿透流动的不稳定。为此,气体注射延迟时间的优化设计对气辅共注成型过程极为关键。The experimental researches of advanced gas-assisted co-injection molding （ shortened as GACIM） were implemented in this paper, the influencing rules of gas packing time and gas delay time on the gas and core melt penetrating pattern of GACIM were studied. And the influencing mechanisms were disclosed by theoretical analysis. The results of research showed that, with increasing of gas packing time, the gas penetrating depth and width increased, and with increasing of gas delay time, the gas penetrating depth increased, the gas penetrating width reduced, but the influence of two process parameters on core meh penetrating pattern was not appreciable. Moreover, the results of research showed also that increasing of gas delay time was benefit to gas penetrating, but results easily in instability of gas penetrating flow which made finger appear easily. Therefore the optimization design of the gas delay time is very important to gas-assisted co-injection molding process

关 键 词：气辅共注成型 过程参数 聚合物 

分 类 号：TQ320[化学工程—合成树脂塑料工业]