Finished-product integrally jointed type three-dimensional printing head

Abstract

The invention provides a finished-product integrally jointed type three-dimensional printing head. The finished-product integrally jointed type three-dimensional printing head breaks through a construction form of a traditional three-dimensional printing head; a heating layer is used for carrying out further heating on raw materials in an outer conveying pipe, so that the temperature and flowability of the raw materials in the outer conveying pipe are higher than the temperature and flowability of raw materials in an inner conveying pipe; in a printing process, a lower inclined plane of a flexible heating block is in contact with a printing layer which is slightly cooled and condensed on a lower layer, so that the upper surface of the printing layer on the lower layer can be melted; meanwhile, the raw materials flowing out from an upper feeding hole and the raw materials flowing out from a lower feeding hole are gathered in a material discharging hole; the raw materials flowing out from the lower feeding hole are uniformly distributed at the periphery of the raw materials flowing out from the upper feeding hole to cover the periphery; then the raw materials flow out from a third channel and are in contact with the printing layer on the lower layer, so that the raw materials flowing out from the upper feeding hole and the printing layer on the lower layer are naturally fused toform a whole body, and an obvious jointing surface is not formed between a printing layer on an upper layer and the printing layer on the lower layer; the jointing between the adjacent printing layersis firmer.

Description

[0001] The patent application of the present invention is a divisional application of Chinese patent application number 201710473911.X. The original application number is 201710473911.X, and the application date is June 21, 2017. The name of the invention is a three-dimensional printing head with smooth feeding. technical field [0002] The invention relates to the field of three-dimensional printing machinery, in particular to a three-dimensional printing head integrated with finished products. Background technique [0003] 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-...

AI Technical Summary

Problems solved by technology

[0004] 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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