基于TRIZ理论的水凝胶3D打印试验台改进设计

Improved Design of Hydrogel 3D Printing Test-bed Based on TRIZ Theory

为了改善生物打印机的挤出模块无法对温度实现准确调控、沉积平台的悬臂结构精度低等问题,利用TRIZ理论对现有生物打印机进行功能分析、因果链分析,剖析问题的内在原因,并利用40个发明原理、矛盾矩阵、剪裁模型、STC算子和聪明小人法求解。本文提出4个创新的解决方案:将管道接触面设计为水冷板结构;将喷嘴的驱动装置改为42步进电机并且将传动机构改为滚珠丝杠;利用19906半导体制冷片代替压缩机,可连续制冷;采用塔式散热为制冷片热端散热,提高了制冷效率。将4种方案结合使用后,打印线条的线宽更加稳定。

In order to improve the extrusion module of the bio-printer can not achieve accurate temperature control,and the cantilever structure of the deposition platform is low precision.Based on TRIZ theory,function analysis and causal chain analysis of existing bio-printers are carried out to analyze the internal reasons of the problems.It is solved by 40 invention principles,contradiction matrix,clipping model,STC operator and smart man method.Four innovative solutions are proposed in this paper:the pipe contact surface is designed as water-cooled plate structure;The driving device of the nozzle is changed to 42 step motor and the driving mechanism is changed to ball screw;Using 19906 semiconductor refrigeration sheet instead of compressor,continuous refrigeration;The tower heat dissipation is used to heat the hot end of the cooling plate,which improves the cooling efficiency.After the four schemes are combined,the line width of the printed line is more stable.