A desktop fdm 3D printer hot end device

Abstract

The invention discloses a hot end device of a desktop-level FDM (frequency-division multiplexing) 3D printer. The hot end device comprises an extrusion head, wherein the extrusion head comprises an extrusion spray nozzle (1) with a hexagonal flange in middle, an extrusion head heat conduction block (3) with a mounting hole position, an extrusion head thermal insulation housing (4), a stainless steel throat tube (5), a polytetrafluoroethylene lining tube (7) arranged in the stainless steel throat tube (5) and an MCH ceramic heating plate (12), and further comprises a throat tube radiator arranged on the upper part of the stainless steel throat tube (5), wherein the throat tube radiator comprises two semiconductor refrigeration plates (6), a water-cooling heat conduction block (8), a water-cooling bent tube (9), a throat tube heat conduction block (10) and two tetrafluoro fixing parts (11); and the outer upper part of the extrusion spray nozzle (1) is further provided with an inner threaded copper sleeve (2) in a sleeved mode, and is in threaded connection with the lower part of the stainless steel throat tube (5) through the upper part of the inner threaded copper sleeve (2). The hot end device of the desktop-level FDM 3D printer has the advantages of being stable in printing performance, free of wire drawing and adhesion, good in printing effect, high in quality of a printed product, and the like.

Description

technical field [0001] The invention relates to a desktop-level FDM 3D printer hot end device, which belongs to the extrusion technology in the FDM 3D printer. Background technique [0002] The hot end used by the desktop-level FDM 3D printers currently on the market generally has a fusion cavity (the fusion cavity is a part of the inner flow channel whose temperature is higher than the melting point of the consumable when the extrusion head is working) is too long, resulting in melting in actual operation. The length of the consumables in the state is too long, which makes the extruder unable to control the extrusion of the consumables well. When not extruding or even pulling back, some consumables still flow out of the extrusion nozzle, causing defects such as drawing and sticking, which affect quality of the printed product. Contents of the invention [0003] The purpose of the present invention is to invent a desktop-level FDM 3D printer hot-end device that can solve ...

AI Technical Summary

Problems solved by technology

[0002] At the hot end of the desktop FDM 3D printers currently on the market, the length of the melting chamber (the melting chamber is the part of the inner flow channel where the temperature of the extrusion head is higher than the melting point of the consumable) is generally too long, resulting in a long segment of the consumable in the molten state during actual operation, which makes the extruder unable to control the extrusion of the consumable. When not extruding or even pulling back, some consumables still flow out of the extrusion nozzle, resulting in defects such as drawing and sticking, which affects the quality of the printed product.

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