3D printing head for material extrusion molding

Abstract

The invention discloses a 3D printing head for material extrusion molding. The 3D printing head comprises a wire feeding cavity, a thimble cavity, a sealing thimble, a printing nozzle, a heating module, a limiting plug, a return spring, an upper end cover and an electromagnet; the heating module is mounted at the bottom of the thimble cavity; the bottom of the heating module is the printing nozzle; the wire feeding cavity, the thimble cavity, an inner channel of the heating module and the printing nozzle form a feeding channel; the top of the thimble cavity is the upper end cover; the electromagnet is mounted on the upper end cover; the sealing thimble, the limiting plug and the return spring are all arranged in the thimble cavity; under the effects of the electromagnet and the return spring, the limiting plug can drive the sealing thimble to act up and down; when the electromagnet is electrified, the limiting plug drives the sealing thimble to lift to a high point, and at this time, the bottom end of the sealing thimble is deviated from the printing nozzle; and when the electromagnet loses power, the limiting plug drives the sealing thimble to descend to a low point under the effect of the return spring, and at this time, the bottom end of the sealing thimble blocks the printing nozzle to stop discharging.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a 3D printing head for extruding materials. Background technique [0002] 3D printing technology refers to the fact that the print head performs material filling and manufacturing according to the cross-sectional information of the current layer under the control of the program, and then quickly manufactures the required parts through layer-by-layer accumulation. Because it can manufacture arbitrary complex parts and has better printing freedom It has more and more practical application value in industrial production and daily life. As an important branch of the field of 3D printing, 3D printing of extrudable materials has attracted more and more attention from scholars at home and abroad, because it has a wide range of materials that can be prepared, energy saving of some materials that can be recycled and remanufactured, and some light weight. Due to its high-s...

AI Technical Summary

Problems solved by technology

[0003] However, the existing 3D printer nozzles are prone to wire breakage and nozzle blockage during the printing process. The efficiency of rapid prototyping is low and the printing effect is not ideal. The 3D printing nozzle itself performs multi-layer superposition on the forming surface. Problems and the sealing performance of the nozzle when it works intermittently are likely to cause wire drawing to block the nozzle, causing the 3D printer to malfunction, seriously affecting the accuracy and surface smoothness of the part

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