Three-dimensional printer for strong finished product integrity

Abstract

The invention provides a three-dimensional printer for a strong finished product integrity. A heating layer makes the temperature and the fluidity of a raw material in an outer conveying tube higher than the temperature and the fluidity of a raw material in an inner conveying tube, the lower slope of a flexible heating block is in contact with a slightly cooled and solidified lower printed layer in the printing process to make the upper surface of the lower printed layer melted, the raw material flowing out of an upper feeding hole and a raw material flowing out of a lower feeding hole meet ina discharging hole, and the raw material flowing out of the lower feeding hole is uniformly distributed surrounding the raw material flowing out of the upper feeding hole to wrap the raw material flowing out of the upper feeding hole, then flows out of a third channel and is in contact with the lower printed layer to make the raw material flowing out of the upper feeding hole and the lower printed layer naturally melted integrally. A first heat insulating layer avoids the heating layer and heat of the raw material in the outer conveying tube from being delivered to the raw material in the inner conveying tube in order to avoid the normally designed fluidity of the raw material in the inner conveying tube from being affected. A second heat insulating layer ensures the integral heat insulating effect of a whole printing head.

Description

[0001] The patent application of the present invention is a divisional application of Chinese patent application number 201710474013.6. The original application number is 201710474013.6, and the application date is June 21, 2017. The title of the invention is a three-dimensional printer with a solid finished product. technical field [0002] The invention relates to the field of three-dimensional printing machinery, in particular to a three-dimensional printer 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-dimen...

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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