摘要
根据快速成形技术的发展方向,针对熔融堆积成形工艺中已有喷头技术的特点,提出一种基于颗粒体进料的微型螺旋挤压堆积喷头。该喷头能否成功应用的技术难点是挤压螺杆的小型化问题和颗粒体稳定可靠的进给问题,为此提出针对小型化螺杆的一套可行设计方法和新颖的推杆凹槽送料方式。对装配好的喷头装置的堆积试验,证明了颗粒体送料的螺旋挤压堆积喷头的技术是可行的。通过进一步的技术完善,该喷头装置可以用于热塑性弹性体和一些基于医学材料的原型制作。
Based on the development of rapid prototyping （RP） technology, a new extruding deposition head fed with bulk material in granulated form is presented through analyzing the characteristics of existent head systems in the fused deposition modeling（FDM） process. The difficulties of the head realization are the miniaturization of extruding screw and the steady feeding of the granules. Therefore, a feasible design method of small extruding screw is founded, and a novel feeding set is adopted. Through a series of experiments, the new extrusion head technology is proven feasible. With further improvement, the deposition head can be used to fabricate prototypes with thermoplastic elastomer or biomaterial material.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2006年第9期178-184,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金(50575139)
上海汽车工业科技发展基金(0330)资助项目
关键词
快速成形
熔融堆积成形
挤压螺杆
颗粒体
挤压堆积喷头
Rapid prototyping Fused deposition modeling Extrusion screw Bulk material in granulated form Extruding deposition head
