Electromagnetic synchronous switching double-printing-head extrusion system

Abstract

The invention discloses an electromagnetic synchronous switching double-printing-head extrusion system. The electromagnetic synchronous switching double-printing-head extrusion system comprises a base, a driving feeding wheel, two micro-guide rail sliding blocks, two printing head assemblies, two magnetic bodies, an electromagnet and a positioning assembly, wherein the driving feeding wheel is rotationally arranged on the front surface of the base, the two micro-guide rail sliding blocks are symmetrically arranged on the two sides of the driving feeding wheel in a vertical included angle mode,the two printing head assemblies are vertically mounted on the two micro-guide rail sliding blocks correspondingly, the two magnetic bodies are arranged on the tops of the printing head assemblies correspondingly, the electromagnet is horizontally installed on the front surface of the base, and the electromagnet drives the magnetic bodies to drive the printing head assemblies to be alternately switched at a certain angle in the center line directions of the micro-guide rail sliding blocks. According to the electromagnetic synchronous switching double-printing-head extrusion system, the two-printing-head motion included angle structure is innovatively designed, only one driving motor and one electromagnet are used, synchronous switching of the working states of a feeding assembly is achieved while the height difference of printing heads is switched, the overall structure is simple and reliable, and the implementation is easy.

Description

technical field [0001] The invention relates to a 3D printer based on a fusion deposition rapid prototyping process, in particular to an electromagnetic synchronous switching double print head extrusion system. Background technique [0002] The 3D printer based on the fused accumulation rapid prototyping process is to melt and extrude the filamentous thermoplastic material from the heated nozzle, and print and accumulate layer by layer at a fixed rate according to the predetermined trajectory of each layer of the part to form a three-dimensional object. Usually, the fused deposition rapid prototyping process needs to add supports when manufacturing objects with cantilever structures. If the 3D printer only has a single print head design structure, the printed object and support can only be constructed with the same material. Although during the printing process, the support part can be loosened by controlling the operation mode of the print head to achieve the purpose of ea...

AI Technical Summary

Problems solved by technology

However, relying on the thrust of the filament on the flow channel to switch the height difference of the print head, it is easy to be affected by the thermal properties of the material itself, resulting in a change in the thrust, thereby reducing the reliability of the print head, and relying on the spring mechanism to realize the reset of the print head after switching. There are high requirements on the processing and assembly precision of mechanical parts, and the quality is difficult to control, which will inevitably affect the accuracy of the switching height of the two printing heads; the switching of the height difference between the two printing heads through the driving mechanism requires a complex set of mechanical transmission, The positioning mechanism can only be realized by adding a driving motor, which increases the cost, volume and weight of the extrusion system, and greatly restricts the improvement of printing speed

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