基于PA承载的NdFeB磁感器注射模设计  

Design of injection mould for NdFeB magnetic sensor based on PA

作　　者：刘俊 温瑞[2] 肖国华[2] 刘军 LIU Jun;WEN Rui;XIAO Guohua;LIU Jun(Ningbo Shouzheng Magnetoelectric Co.,Ltd.,Ningbo,Zhejiang 315000,China;Zhejiang Business Technology Institute,Ningbo,Zhejiang 315412,China;Chongqing Keneng Senior Technical School,Chongqing 400037,China)

机构地区：[1]宁波守正磁电有限公司,浙江宁波315000 [2]浙江工商职业技术学院,浙江宁波315412 [3]重庆市科能高级技工学校,重庆400037

出　　处：《模具工业》2023年第1期42-45,共4页Die & Mould Industry

基　　金：浙江工商职业技术学院科研基金项目(2020Y01);浙江工商职业技术学院2021年度课程思政教学研究项目(ksjy2021036)。

摘　　要：结合某磁感器粉末冶金成型工艺,设计了1副两板注射模用于烧结前中间体的成型,与磁粉接触的成型零件及推出零件材料都选用304不锈钢,模具中设置有电磁线圈组件和斜导柱滑块侧抽芯组件。试模获得的最佳成型工艺参数为注射温度266℃,注射压力5.8 MPa,保压压力4.88 MPa,保压时间5.6 s,模具温度80℃,成型的磁体在充磁磁场的作用下充磁2次即可到达磁体性能设计目标。According to the moulding process of powder metallurgy of a magnetic sensor, a twoplate injection mould was designed for the moulding of intermediate before sintering. The 304stainless steel was selected for the moulding parts and the ejection parts in contact with magnetic powder, and the electromagnetic coil assembly and the side core-pulling assembly of the inclined guide pillar and slider were arranged in the mould. The optimal moulding process parameters obtained from the tryout were injection temperature 266 ℃, injection pressure 5.8 MPa, dwell pressure 4.88 MPa, dwell time 5.6 s and mould temperature 80 ℃. The moulding magnet could reach the design goal of the magnet performance after being magnetized twice under the action of the magnetizing magnetic field.

关 键 词：尼龙塑料 铁钕硼永磁材料 注射成型 模具设计 粉末冶金 

分 类 号：TG76[金属学及工艺—刀具与模具] TQ320.662[化学工程—合成树脂塑料工业]