A temperature-controllable 3D printing nozzle with automatic adjustment of the discharge mode

Abstract

The invention relates to a temperature-controllable 3D printing spraying head with the function of automatically adjusting a discharging mode, and belongs to the technical field of 3D printing. The technical problems that an existing spraying head is inconvenient to adjust and control, and the temperature and discharging mode of a printing material are difficult to control are solved. According tothe adopted technical scheme, a spraying head shell is a hollow cylinder with the open bottom and the top with an opening in the center, and a circular-ring-shaped fixing plate is fixed to the lowermiddle part of the inner wall of the spraying head shell to form a discharging opening; a material loading barrel is a hollow circular pipe and concentrically mounted in the spraying head shell in a sleeved mode, and an extruding piston is mounted in the material loading barrel in a sleeved mode; a resistance wire is evenly wound around the outer wall of a heat conducting layer, and the heat conducting layer is mounted outside of the material loading barrel in a sleeving mode and closely attached to the outer wall of the material loading barrel; three convergence pieces are closely attached toform an inverted cone with the open top, the three convergence pieces are connected with the discharging opening through rotating shafts, and three compression springs are fixed between the three convergence pieces and the inner wall of the spraying head shell correspondingly; and two extra electric field electrode plates are symmetrically mounted at the bottom of the inner wall of the spraying head shell in an embedded mode.

Description

technical field [0001] The invention discloses a temperature-controllable 3D printing nozzle that automatically adjusts the discharge mode, and belongs to the technical field of 3D printing. Background technique [0002] Bio-3D printer is a rapid prototyping device that can be printed with a variety of biomaterials. It uses relevant data to print out solid 3D biomaterial-compatible structures. inner structure. To put it simply, the biological 3D printer controls the movement of the printing material cylinder in three-dimensional space, and extrudes the biological material in fluid, colloid or paste through air pressure, and the material is formed into models of different shapes after layer upon layer accumulation, thus completing 3D printing. printing process. [0003] However, due to the different properties of materials, their requirements for printing conditions are also different, such as temperature and material particle size. Or the requirements for the printing mat...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, the temperature-controlled biological 3D printing nozzle can only perform single-point temperature control, which will cause uneven heating of biological materials and affect the printing quality of biological materials

Existing bio-3D printing nozzles cannot control the diameter of the nozzle according to the particle size of the material, resulting in easy clogging of the bio-printing nozzle, and even cell death when printing cells

In addition, the existing 3D bio-printing nozzles cannot control the way the material is discharged, resulting in deviations between the printed 3D bio-structure and the expected structure

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