短射法水辅助注塑工艺水穿透实验  

Water Penetration During Short-Shot Water-Assisted Injection Molding Process

作　　者：匡唐清[1] 邓洋[1] 余春丛[1] 章凯[2] 

机构地区：[1]华东交通大学机电工程学院,江西南昌330013 [2]南昌大学聚合物加工研究室,江西南昌330031

出　　处：《高分子材料科学与工程》2015年第4期121-126,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51103037);国家留学基金资助;江西省自然科学基金资助项目(2010GQC0029)

摘　　要：对短射法水辅助注塑工艺中水的穿透进行了实验研究。实验表明,水穿透分为一次、二次穿透,一次穿透分前后段。单因素实验发现,一次穿透长度随熔体预注量的减少、注水延迟时间的延长、注水压力的降低而变长。一次穿透前段残余壁厚随熔体预注量和注水延迟时间的延长而变厚,后段残余壁厚则相反;一次穿透残余壁厚随注水压力增大而变薄。正交实验发现,一次穿透长度主要受熔体预注量和注水延迟时间影响;一次穿透前段残留壁厚主要受注水延迟时间和注水压力的影响;一次穿透前后段残留壁厚差主要受熔体预注量、注水延迟时间和注水压力的影响。Experimental study on water penetration during short-shot water-assisted injection molding( SSWAIM)process was carried out based on a lab-developed water-assisted injection molding system. Water penetration during the SSWAIM can be divided into water primary penetration( WPP) and water secondary penetration( WSP),and the WPP can be divided into front segment and rare segment. Single factor method was used to investigate effects of the short-shot size,water injection delay time and water injection pressure on water penetration. The investigation shows that reducing short-shot size or increasing water delay time or reducing water injection pressure increases the WPP length and decreases the volume of WSP. Increasing short-shot size or water delay time increases the residual wall thickness( RWT) at the front segment of WPP and reduces that at the rare segment of WPP. Increasing water injection pressure reduces RWT of the whole WPP. An experimental study,based on the Taguchi orthogonal array design,was conducted to characterize the effect of different processing parameters on water primary penetration during SSWAIM process. The experimental results can be used to optimize the molding process.

关 键 词：水辅助注塑 短射法 水穿透 壁厚 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]