A 3D printing head with smooth feeding

Abstract

The invention proposes a three-dimensional printing head with smooth feeding, which breaks through the structural form of the traditional three-dimensional printing head. The heating layer further heats the raw materials in the outer conveying pipe, so that the temperature and fluidity of the raw materials in the outer conveying pipe are higher than those in the inner conveying pipe. The temperature and fluidity of the raw material in the tube. During the printing process, the lower inclined surface of the flexible heating block contacts the slightly cooled and solidified printing layer of the lower layer, which can melt the upper surface of the lower printing layer. At the same time, the raw material flowing out of the upper feeding hole and the The raw materials flowing out of the lower feeding hole meet in the lower feeding hole, and the raw materials flowing out of the lower feeding hole will be evenly distributed around the raw materials flowing out of the upper feeding hole for wrapping, and then flow out from the third channel to contact the lower printing layer, making the upper printing layer The raw materials flowing out of the feed hole and the lower printing layer are naturally integrated into one, so that there is no obvious joint surface between the upper printing layer and the lower printing layer, and the joint between adjacent printing layers is stronger.

Description

technical field [0001] The invention relates to the field of three-dimensional printing machinery, in particular to a three-dimensional printing head with smooth feeding. 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 three-dimensional printer is well known, such as Chinese invention patent 201310559350.7, which discloses a fused deposition three-dimensional printing nozzle and a printer, wherein a fused deposition three-dimensional printing nozzle includes a screw barrel, a nozzle, and a screw shaft, wh...

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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