A three-dimensional printer with a solid finished product

Abstract

The invention provides a three-dimensional printer (3DP) capable of producing firm finished products. Structural forms of traditional 3DPs are broken through, a heating layer is used for further heating raw materials in an outer conveying tube, and the temperature and fluidity of the raw materials in the outer conveying tube are made higher than those of raw materials in an inner conveying tube; in the printing process, the lower bevel of a flexible heating block makes contact with a lower printed layer which is slightly cooled and solidified, and the upper surface of the lower printed layer can be melted; meanwhile, raw materials flowing out of an upper feeding hole and raw materials flowing out of a lower feeding hole are converged in a discharging hole, the raw materials flowing out of the lower feeding hole are distributed uniformly on the peripheries of the raw materials flowing out of the upper feeding hole for a wrapping purpose, and then the raw materials flow out of a third channel to make contact with the lower printed layer, so that the raw materials flowing out of the upper feeding hole, and the lower printed layer are naturally fused into a whole; and an obvious junction surface between an upper printed layer and the lower printed layer does not exist, and junction between the adjacent printed layers are firmer.

Description

Technical field [0001] The invention relates to the field of three-dimensional printing machinery, in particular to a three-dimensional printer with firm finished products. Background technique [0002] Three-dimensional printers, also known as three-dimensional printers (3D Printer, referred to as 3DP) is a process of rapid prototyping (RP), which uses layer-by-layer stacking to create a three-dimensional model. Its operation process is similar to that of a traditional printer, except Traditional printers print ink on paper to form a two-dimensional plane drawing, while three-dimensional printers use liquid photosensitive resin materials, molten plastic filaments, gypsum powder, metal powder and other materials to achieve this by spraying adhesives or extruding. Layers are stacked to form a three-dimensional entity. The structure of 3D printers is well known. For example, Chinese invention patent 201310559350.7 discloses a fused deposition 3D printing nozzle and printer. One of...

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 print 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 from the joint surface, which has become one of the important defects of the 3D printed product, and the smoothness of conveying raw materials needs to be improved

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