尼龙绝缘轨距块产品翘曲变形影响因素及其解决办法  

Affected Factors of Warp IMstortion of Nylon Insulation Gauge and Their Solved Methods

作　　者：常杰 高卫峰 张远庆[2] 崔永生 张伟华 张立 

机构地区：[1]河北铁科翼辰橡胶制品有限公司,石家庄052160 [2]中国铁道科学研究院铁道建筑研究所,北京100081 [3]北京铁科首钢钢轨技术股份有限公司,北京102206

出　　处：《塑料助剂》2014年第5期50-54,共5页Plastics Additives

摘　　要：以铁路扣件系统中尼龙绝缘轨矩块产品为对象,从配方组成、模具浇口设计及注射成型过程中各项工艺参数如注塑速率、注塑压力、保压压力、保压时间等方面研究了其翘曲变形的成因,并提出了保持尼龙绝缘轨距块尺寸稳定的解决方法。研究发现,在聚烯烃弹性体接枝马来酸酐(POE-g-MAH)添加量为1.5份时最适合,轨距块角度合格,产品不变形;降低注塑速度和采用多级注塑,能够改善产品翘曲变形情况,同时减少产品表面的喷射纹;增大浇口可减小轨距块翘曲变形。Nylon insulating injection products was found to be easy warp distortion when they were used as railway fasteners.Many reasons for the warp distortion were carfully investigated from the composition,molding sprue design and technique parameters,such as injection rate,injection press,dwell press and dwell time.Some solutions were taken for dimension stablity of injection products based on the above studies.

关 键 词：尼龙 翘曲变形 注射 模具浇口 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]