Three-dimensional printing head with high product integrity

Abstract

The invention provides a three-dimensional printing head with high product integrity, and aims at breaking the structure form of a traditional three-dimensional printing head. The three-dimensional printing head with the high product integrity is characterized in that raw materials in an outer conveying pipe are further heated through a heating layer, so that the temperature and the mobility of the raw materials in the outer conveying pipe are more than those of the raw materials in an inner conveying pipe; during printing, a lower inclined surface of a flexible heating block is in contact with a lower printing layer which is slightly cooled and solidified, so that the upper surface of the lower printing layer can be molten; and meanwhile, the raw materials flowing from an upper feeding hole are combined with the raw materials flowing from a lower feeding hole through a discharging hole; the raw materials flowing from the lower feeding hole can be uniformly distributed at the surroundings of the raw materials flowing from the upper feeding hole in order to coat the raw materials flowing from the upper feeding hole and then the raw materials flowing from the lower feeding hole flowout from a third channel and are in contact with the lower printing layer, and thus the raw materials flowing from the upper feeding hole are naturally integrated with the lower printing layer; an integrating surface between the upper printing layer and the lower printing layer is not obvious; the adjacent printing layers can be firmly integrated.

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 with strong product integrity. 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-dime...

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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