Research On Three-dimensional Additive Forming System For Biomaterial Frame For Wound Covering

The burn wound in the early stage of skin is susceptible to infection and causes serial ulceration,The use of a temporary wound veneer not only helps protect the wound from infection,but also acts as a growth frame for the skin’s surface cells.The conformable surface veneer not only makes the cells adhere to the edge of the wound,but also serves as the best film for treating burns.For the printing problem of micron-sized cell growth framework,the research of three-dimensional scanning technology of wound and the code conversion of 3D printing of robotic arm are studied.Additive molding printing are based on mechanical arm and traditional 3D printer with pneumatic push system and electric push glue system.Finally,the results of traditional 3D printer and robotic arm 3D printing are compared and analyzed.The main content of this paper is:(1)Analyze the physical properties of the material first,and analyze the biomaterial fluid model based on the experimental results and determine the relevant parameters of the push glue system.Design the structural parameters in the print by mathematical model.;(2)Design the electric push glue system according to the relevant parameters,design the structure of the electric push glue system through the 3D drawing software,and determine the motor type and reduction ratio according to the mathematical model.(3)The skin surface wound model is ingested by a structured light 3D scanning system,and the g-code print code is programmed to be converted into a LS file that can be read by the robot arm,and The robot arm motion model and program are simulated by Robodk robot offline programming software,and the simulation verifies the feasibility of the program;(4)The robot arm and 3D printer were combined with the electric push glue system and the pneumatic push glue system.The experimental results were observed under the microscope,and the internal space of the print frame was obtained by the scale real map distance measurement.And the scheme of judging the structural feasibility by the way of space gap and material proportion is proposed.