Multi-nozzle 3D printing machine

Abstract

The invention discloses a multi-nozzle 3D printing machine. The problems that a current FDM type 3D printing machine is low in printing efficiency, low in speed and high in large-size printing machinedesign and manufacturing difficulty are solved. The multi-nozzle 3D printing machine comprises multiple nozzle assemblies, and each nozzle assembly comprises multiple nozzles which can independentlycontrol wire feeding. Each nozzle assembly can conduct motion in the X direction and the Y direction independently under the drive of a corresponding X-axis and Y-axis motion mechanism. The multiple nozzle assemblies support multi-material printing and can be automatically switched between supporting materials and model materials, the multiple nozzle assemblies conduct parallel printing, and the printing efficiency of the printing machine is improved; and meanwhile the design and machining difficulty of the large-size printing machine is lowered by adopting a fixed type printing platform structure.

Description

technical field [0001] The invention belongs to the technical field of 3D printers, and in particular relates to a multi-nozzle 3D printer. Background technique [0002] 3D printing technology is a rapid prototyping technology. It is based on digital three-dimensional model files, and it is a technology that forms objects such as metal, plastic, and photosensitive resin through layer-by-layer printing. It belongs to additive manufacturing. At present, 3D printers based on the principle of Fused Deposition Modeling (FDM: Fused Deposition Modeling) have become the most popular 3D printers due to their simple structure, rich variety of applicable materials, and low cost of equipment and consumables. [0003] FDM printers are formed by melting the printing consumables and extruding them into filaments, slowly stacking and depositing them from point to line and then to surface. It often takes tens of hours to complete a model of this size, so this limits the application of this ...

AI Technical Summary

Problems solved by technology

[0004] At present, patents have proposed a printer structure that uses multiple print heads to print in parallel to improve printing efficiency, such as the utility model patent "A Multi-nozzle 3D Printer" with application number 201520670412.6, which provides a 3D printer capable of parallel printing , the printer uses multiple nozzles that can move independently to realize the parallel printing function of multiple nozzles, but the solution has the following shortcomings. First, there is only one nozzle and one wire feeding mechanism on each nozzle assembly. Although this method is simple in structure , but because there is only one nozzle, the model and the support can only be printed with the same material, which makes it very troublesome to remove the support after printing. This defect is especially obvious when printing large-scale and complex parts. If you remove the support If you accidentally hurt the model itself, the entire print will be scrapped

[0005] Its second shortcoming is that it only uses the nozzle to realize horizontal movement, and the printing platform realizes vertical movement. This structure is not particularly ideal for large-size printers, because when the printing size increases, the print The limit weight will increase exponentially, for example, when the printer size is 400×400×400mm, the material density is 1.0g / cm 3 Calculated, its limit weight is 64Kg; and when the size increases to 1000×1000×1000mm, its limit weight will increase to 1000Kg

However, when the number of nozzles is large, the solution requires that the nozzles on the upper layer be able to be on the same plane as the nozzles on the bottom layer when stretched out, and must be able to fully enter the base after shrinking so that they can cross the nozzles on the adjacent layer. To achieve this The nozzle structure will be very complex and the accuracy is difficult to guarantee

[0007] From the above analysis, it can be seen that the multi-nozzle parallel printing scheme in the prior art is not very ideal

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