3D bio-printer head control device and material changing control method of head

Abstract

The invention relates to a 3D bio-printer head control device and a material changing control method of a head, and belongs to the technical field of 3D bio-printer head control. The technical problemto be solved is to provide a 3D bio-printer head structure, a hardware structure of a control device and improvement of the material changing control method of the head. According to the technical scheme used for solving the technical problem, the device comprises a motor control frame, a printing head and a material changing device, wherein the motor control frame is arranged at the top of the 3D bio-printer, a stepping motor is arranged on one side of the motor control frame, two ends of the motor control frame extend outwards and are provided with fixed beams, a threaded shaft is arrangedon the fixed beams, the threaded shaft drives a printing device to move on the Y-axis printing plane through the stepping motor; and the printing device comprises a connecting end and a fixing end, wherein the connecting end is fixedly connected with the fixing end through a bolt, the connecting end is in transmission connection with the threaded shaft, a fixing clamp is arranged at the extendingend of the fixing end, and the fixing clamp is used for clamping a printing head. The control device is applied to the 3D bio-printer.

Description

technical field [0001] The invention discloses a 3D bioprinter nozzle control device and a nozzle refueling control method, belonging to the technical field of 3D bioprinter nozzle control. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a technology based on digital model files and using bonding materials such as powdered metal or plastic to construct objects by layer-by-layer printing. 3D printing technology appeared in the mid-1990s and is actually the latest rapid prototyping device utilizing technologies such as light curing and paper lamination. The working principle of it is basically the same as that of ordinary printing. The printer is filled with "printing materials" such as liquid or powder. After being connected to the computer, the "printing materials" are superimposed layer by layer through computer control, and finally the blueprint on the computer is turned into a real object. [0003] 3D bioprinter is a kind of equ...

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Problems solved by technology

[0003] 3D bioprinter is a kind of equipment that can position and assemble biological materials or cell units according to the principle of additive manufacturing under the drive of digital three-dimensional model, and manufacture medical devices, tissue engineering scaffolds, tissues and organs and other products; in actual use, due to biological The viscosity of the material is relatively high, and ordinary industrial piezoelectric nozzles cannot spray biomaterials with a viscosity exceeding 20 cps. After the 3D printer has been used for a period of time, viscous materials are likely to accumulate at the nozzle position and cause nozzle clogging.

[0004] After the nozzle is clogged, in order to keep the printing going, it is necessary to clean the printing nozzle in time. Currently, the barrels, throats and nozzles of 3D printers on the market are all reusable, but they have the following defects: Not only is it easy to cause damage to the nozzle, but it is time-consuming and laborious to disinfect and clean; if the barrel is not cleaned cleanly, the biological material used for printing will be polluted, which will seriously affect the quality of the printed product; on the other hand, when printing with multiple materials, when When a material is printed, the material must be changed manually, which will cause the printing process to be unable to be completely operated in a sterile environment, and there is also a risk of contamination of the printed material

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