A three-dimensional printer

Abstract

The invention provides a three-dimensional printing machine, which breaks through the construction form of a traditional three-dimensional printing machine. Molten raw materials respectively flow out from a third passage and a seventh passage; a heating component is used for heating a second far side wall and enables a heating inclined surface on the lower end to have higher temperature; meanwhile, the heating component is used for further heating raw materials in an auxiliary printing head and enables the temperature and the fluidity of the raw materials in the auxiliary printing head to be higher than the temperature and the fluidity of raw materials in a main printing head; the heating inclined surface is in contact with a lower printing layer which is slightly cooled and condensed, so that the upper surface of the lower printing layer can be molten; then the raw materials flowing out from the seventh passage is cushioned between the raw materials flowing out from the third passage and the lower printing layer of which the surface is molten; the raw materials flowing out from the seventh passage plays a role in cementing, so that the raw materials flowing out from the third passage and the lower printing layer are naturally integrated, and bonding between adjacent printing layers is firmer.

Description

technical field [0001] The invention relates to the field of three-dimensional printing machinery, in particular to a three-dimensional printer. Background technique [0002] Three-dimensional printers, also known as three-dimensional printers (3D Printer, 3DP for short), are a process of rapid prototyping (RP). Traditional printers print ink onto paper to form two-dimensional plane drawings, while 3D printers use liquid photosensitive resin materials, melted plastic filaments, gypsum powder, metal powder and other materials to achieve this by spraying binders or extruding. Layers are stacked and superimposed to form a three-dimensional solid. The structure of a unit printer is already known, such as Chinese invention patent 201310559350.7 disclosing a fused deposition 3D printing nozzle and a printer, wherein a fused deposition 3D printing nozzle includes a screw barrel, a nozzle, and a screw shaft, wherein the nozzle is mounted on a screw shaft The lower part of the barr...

AI Technical Summary

Problems solved by technology

[0003] The invention can generate a stable driving force and effectively push the molten filament to be extruded from the nozzle. However, in actual use, the invention is the same as other 3D printers on the market. During the printing process of accumulating raw materials layer by layer, the upper and lower layers are printed There is a time difference in the accumulation of layers. When the upper printing layer is laid on the lower printing layer, the lower printing layer has been slightly cooled and solidified. The upper printing layer is only laid on the lower printing layer, and there is an obvious joint surface. Due to the incomplete fusion of layers, the integrity of the 3D printed product is poor, and it is easy to break at the joint surface, which has become one of the important defects of the 3D printed product.

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