稀土磁性塑料注射成型技术研究

Study on Injection Molding of Rare-Earth Plastic Magnets

应用HAAKE转矩流变仪,研究了尼龙6质量分数为7%时,稀土磁性塑料的加工工艺性能。结果表明:稀土磁性塑料喂料体系的润滑剂能有效地降低喂料熔体流动粘度,改善加工条件;而偶联剂会恶化其加工性能;磁粉的粒径分布对原料的粘度和加工工艺有明显的影响,3 5～65 μm的磁粉粒度有利于成型加工;制得了较好综合性能的稀土钕铁硼塑料磁体。

The processability of rare-earth magnetic mat erials with 7 wt% PA6 was studied by using HAAKE torque rheometer.The results s howed that the use of the lubricant for the loading system could decrease the vi scosity and improve the molding conditions effectively,whereas the use of coupli ng agent functioned in reverse.The distrib ution of powder sizes obviously affect ed the blends viscosity and processability ,the optimum size particle diameter wa s 35-65μm;NdFeB plastic magnets with bette r c omprehensive properties were manufactured .