工艺参数对固体自由成型工艺中陶瓷膏体挤出过程的影响  

Effect ofparameters on extrusion process of ceramic paste in solid freeform fabrication

作　　者：刘洪军[1] 刘佳[1] 郑华滨[1] 李亚敏[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点试验室,甘肃兰州730050

出　　处：《制造技术与机床》2013年第3期83-88,共6页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金资助项目(50906037);甘肃省国际科技合作项目(1011WCGA163)

摘　　要：基于陶瓷膏体挤出的固体自由成型(SFF)技术是复杂陶瓷零件制造技术的重要发展方向,膏体挤出过程的控制对SFF陶瓷零件制作工艺至关重要。研究了挤出速度和挤出口尺寸对水基膏体挤出过程的影响,结果表明:挤出压力随挤出速度和挤出口长度的增加而增大,挤出体液相含量在速度较低时偏离初始值,发生了液相迁移现象;挤出压力图和液相迁移的发生存在一定的关系;在挤出速度为0.15mm/s,挤出头长度和直径分别为12～18mm和1mm的情况下,膏体挤出过程不发生液相迁移现象,可用于陶瓷零件的SFF制造工艺。It is a significant development direction to fabricate complicate ceramic components with Solid Freeform Fabrication （SFF） processes based on ceramic paste extrusion. The control of paste extrusion is very important for fabrication process of SFF ceramic components. In this paper, the effect of extrusion velocity and die land size on extrusion process of aqueous paste was investigated. The experimental results show that the extrusion pressure increases with increasing extrusion velocity and die length; the liquid content of extrudate deviates from original value when the extrusion velocity is set too low, and the liquid phase migration occurs; there is corresponding relationship between the occurrence of liquid phase migration and extrusion pressure profiles; there is no liquid phase migration when the extrusion velocity is 0.15 mm/s, die land length is 12～18 mm and die land diameter is 1 mm, which can be applied on SFF process of ceramic parts.

关 键 词：陶瓷膏体挤出 挤出速度 挤出口长度 挤出压力 液相迁移 固体自由成型 

分 类 号：TQ174.1[化学工程—陶瓷工业]