基于颗粒流态化技术的砂型3D打印铺砂器的开发与应用研究

Research on the Development and Application of 3D Printing Sand Spreader Based on Particle Fluidization Technology

为了解决铺砂过程中的预混砂结桥问题,本文基于颗粒流态化技术开发了一种新的砂型3D打印铺砂器。利用仿真手段对比分析了三种(平底、圆底、锥底)流化床铺砂器中型砂的流动特性,在满足铺砂量的要求下,平底流化床铺砂器对已打印砂面的破坏影响小。基于仿真结果开发了新的平底铺砂器样机并进行了现场应用,其铺砂质量良好。

In order to solve the problem of premixed sand bridges in the sand paving process, a new sand spreader of sand mold 3D printing was developed on the basis of the particle fluidization technology in this paper. The flow characteristics of molding sand in three kinds of fluidized bed sanders(flat bottom, round bottom and cone bottom) were compared and analyzed by means of simulation method. The results showed that the flat bottom fluidized bed sander had the least damage to the printed sand surface under the condition of meeting the requirements of sand quantity. Based on the simulation results, a new flat bottom sand spreader prototype was developed and applied in the field, and the sand spreading quality was good.