Molten jetting deposition 3D printing device driven by electric field, and working method thereof

Abstract

The invention discloses a molten jetting deposition 3D printing device driven by an electric field, and a working method thereof. The problems that the molten droplet jetting 3D printing accuracy is low, the printing materials are limited and the micro-scale structure printing is hard to achieve are solved, and the high-accuracy and high-efficiency macro/micro-scale manufacturing of complex 3D structures using thermal phase transition and thermoplastic polymer materials and composite materials is achieved. According to the technical scheme, the 3D printing device comprises a two-dimensional stage which is provided with a printing bed, and an insulating thermal-conductive substrate is attached to the printing bed; a jetting unit is arranged above the insulating thermal-conductive substrate, and connected to a Z-axis workbench; the jetting unit comprises a print head comprising a nozzle and a material storage barrel which are connected to each other, and the print head is connected to the anode of a high-voltage pulse power supply; the nozzle is a musashi conductive nozzle; the material storage barrel is connected to a backpressure control unit; and a heater is sheathed outside the print head, and connected to a temperature control unit.

Description

technical field [0001] The invention relates to the technical fields of additive manufacturing and 3D printing, in particular to an electric field-driven fusion jet deposition 3D printing device and a working method thereof. Background technique [0002] Material jet deposition 3D printing is an additive manufacturing method that selectively deposits forming materials based on the principle of droplet jetting. At present, a variety of material jet deposition 3D printing processes have been proposed internationally, mainly including inkjet (thermal bubble or piezoelectric) Printing, aerosol jet, PolyJet, NanoParticle Jetting, etc. However, these traditional materials are limited by spray deposition forming materials, requiring low viscosity of printing materials (usually less than 100cp), limited types of printing materials, and low printing resolution. At present, it is difficult to achieve submicroscale resolution printing ( The minimum line width of traditional inkjet pri...

AI Technical Summary

Problems solved by technology

However, the existing fused droplet injection molding technology has many shortcomings and limitations: (1) The printing accuracy and resolution are low, and it is difficult to realize the printing of micro-scale structures, especially the inability to realize macro / micro / nano multi-scale and cross-scale manufacturing; (2) The types of materials available for printing are limited, and it is difficult to print high-viscosity molten materials; (3) Traditional fused deposition modeling technology is to extrude and accumulate molten polymer materials, and the extruded molten polymer materials are Relying on gravity to pile down, the molten polymer material is bonded and solidified with the bottom plate or the previous layer of solidified polymer material, but due to the small force of gravity, the extruded molten polymer material is not firmly bonded, and the manufacturing The performance of the part is poor

The printing materials of electrohydrodynamic jet 3D printing are mainly solution materials, and less of them are printed with melt materials, and the printing accuracy and quality are not high

In particular, the height of formed parts (printed parts) is limited, mainly due to the limitation of the distance between the conductive nozzle and the conductive substrate. The height of electrojet printing is generally limited to less than 3 mm, and it is difficult to realize large-sized parts and macro / micro-scale structures. manufacturing

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