Extrusion head device based on fused deposition modeling technology

Abstract

The invention provides an extrusion head device based on a fused deposition modeling technology. The extrusion head device comprises an extrusion head body with a melting channel, and further comprises a heat-insulation thermal insulation structure, wherein a heating assembly and a temperature measuring assembly are arranged on the extrusion head body; the upper end of the extrusion head body is connected with a heat dissipation device; the lower end of the extrusion head body is provided with a spray nozzle; a heat insulation structure is arranged between the extrusion head body and the heat dissipation device; and the heat-insulation thermal insulation structure covers outside the extrusion head body. The extrusion head device solves the technical problems in the prior art that temperature control is single, temperature measurement is in accurate, energy consumption is high, unstability is easily caused, different material filament materials are adopted, varying condition adaption is poor and the like. The spray nozzle and the extrusion head are an integrated structural design, so that molten material filaments can be prevented from overflowing and the material filaments can be kept at a stable temperature in the spray nozzle. The extrusion head device has the advantages such as stable sectional temperature control regulation, accurate temperature measurement, low energy consumption, an adjustable filament feeding speed, a wide material filament range and the like.

Description

technical field [0001] The invention belongs to the technical field of fused deposition modeling, and in particular relates to an extrusion head device for three-dimensional layered printing based on fused deposition modeling technology. Background technique [0002] 3D printing technology belongs to rapid prototyping technology. Its basic principle is lamination manufacturing. The fast printer forms the cross-sectional shape of the workpiece by scanning in the X-Y plane, and the displacement of the thickness of the layer is performed intermittently in the Z coordinate, and finally forms a three-dimensional part. . Fused deposition modeling (FDM) technology is a kind of 3D printing technology, which heats and melts filamentous hot-melt materials, and at the same time, under the control of the computer, the three-dimensional nozzle selectively coats the material on the surface according to the cross-sectional profile information. On the workbench, a layer of cross-section is...

AI Technical Summary

Problems solved by technology

[0003] At present, the extrusion head of 3D printers based on the principle of FDM often encounters the following problems in use: ①The extrusion head has only one temperature control device, and the temperature in the melting zone and the flow forming temperature at the outlet cannot be taken into account; ②The temperature of the cooling end of the extrusion head high, high energy consumption

The filament softens prematurely in the heat dissipation end, resulting in unstable filament output from the nozzle, difficulty in extrusion, and even wire feeding failure; ③The temperature measurement is not accurate enough to accurately measure the temperature required for the filament to melt in the melting channel; ④Extrusion The efficiency is low, and basically only materials with similar thermal properties can be printed. For high melting point materials and complex working conditions, it is difficult to self-adapt; The upper limit of the working temperature of the extrusion head affects the uniformity of the temperature field distribution in the molding chamber

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