Research of nozzle pressure control system based on air pressure 3d printer

With advances in 3D bio-printing, multi-material tissue and organs regeneration have become realistic foreground in the field of tissue engineering. 3D bio-printing - the distribution of well-organized cells to construct the biofabrication that can substitute the damaged tissue and organs - is a prospect strategy. But there are still many problems such as material extrusion speed, forming precision, which will affect the cell distribution uniformity and prototyping precision. In this paper, we have developed a novel pneumatic control technology, which has been successfully applied to 3D bioprinter. The correlative experiments were designed to verify reliability of system, and experimental results show that pneumatic control system (PCS) can maintain the 3D bio-printing process output pressure stable, which improves control precision, and also prevents material accumulation or insufficient material. It could further confirm that the PCS has potential application prospect in the field of 3D bio-printing.