长玻纤增强聚丙烯流体辅助注塑管件的工艺影响  

Process effects of long glass fiber reinforced polypropylene fluid assisted injection molding pipes

作　　者：王佳敏 匡唐清 柳和生 朱瑶瑶 高聪 WANG Jiamin;KUANG Tangqing;LIU Hesheng;ZHU Yaoyao;GAO Cong(School of Mechanical&Vehicle Engineering,East China Jiaotong University,Nanchang 330013,China;Jiangxi Liansu Technology Industry CO.,LTD.,Nanchang 330100,China)

机构地区：[1]华东交通大学机电与车辆工程学院,南昌330013 [2]江西联塑科技实业有限公司,南昌330100

出　　处：《复合材料学报》2024年第5期2436-2444,共9页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(52163006;52273033);江西省重点研发计划(20223BBE51012);江西省自然科学基金重点项目(20232ACB204004)。

摘　　要：采用气体辅助注塑工艺(GAIM)、气体驱动弹头辅助注塑工艺(G-PAIM)、水辅助注塑工艺(WAIM)和水驱动弹头辅助注塑工艺(W-PAIM)这4种工艺方法成型长玻纤增强聚丙烯(LGFR-PP)流体辅助注塑管件,对比研究各工艺方法对管件壁厚、玻纤断裂长度及玻纤取向的影响。结果表明:W-PAIM工艺管件壁厚最薄且壁厚均匀性最好,GAIM工艺管件壁厚最厚且壁厚均匀性最差;G-PAIM比WAIM管件壁厚均匀性更好,但WAIM管件壁厚更薄;4种工艺方法中玻纤断裂长度呈不均匀分布,平均玻纤断裂长度WAIM>GAIM>WPAIM>G-PAIM,弹头的引入使玻纤断裂作用加剧,玻纤断裂长度更短;G-PAIM、WAIM和W-PAIM工艺中玻纤沿流动方向取向度由近模壁层到中间层再到近流道层呈现逐渐升高的趋势,GAIM玻纤取向杂乱无章;各工艺管件玻纤取向程度W-PAIM>WAIM>G-PAIM>GAIM。The long glass fiber reinforced polypropylene fluid-assisted injection molding pipes were molded by four processes:Gas-assisted injection molding process(GAIM),gas-projectile-assisted injection molding process(G-PAIM),water-assisted injection molding process(WAIM)and water-projectile-assisted injection molding process(W-PAIM).The effects of each process on the wall thickness,glass fiber fracture length and glass fiber orientation of the pipes were compared and studied.The results show that the wall thickness of the W-PAIM process pipes is the thinnest and most uniform,and the wall thickness of the GAIM process pipes is the thickest and most non-uniform.G-PAIM had better wall thickness uniformity than WAIM pipes,but WAIM pipes has thinner wall thicknesses.The glass fiber fracture lengths are unevenly distributed among the four process methods.The average glass fiber fracture length is ranked as WAIM>GAIM>W-PAIM>G-PAIM.The introduction of the projectile intensifies the glass fiber fracture effect,so that the glass fiber fracture length is shorter.In G-PAIM,WAIM and W-PAIM processes,the orientation of glass fibers along the flow direction tends to increase gradually from near the mold wall layer to the middle layer to near the runner layer,and the orientation of GAIM glass fibers is disorganized.The degree of glass fiber orientation of each process pipes is ranked as W-PAIM>WAIM>G-PAIM>GAIM.

关 键 词：长玻纤增强聚丙烯 流体辅助注塑 工艺方法 玻纤取向 玻纤断裂长度 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]