Three-dimensional printer single-motor extrusion system capable of actively switching printing head

Abstract

The invention discloses a three-dimensional printer single-motor extrusion system capable of actively switching a printing head. The three-dimensional printer single-motor extrusion system capable ofactively switching the printing head comprises a base plate, a feeding assembly, a printing head fixing base, a switching auxiliary device, a fixed printing head and a movable printing head arranged on the printing head fixing base, and a switching mechanism nested into the movable printing head, wherein the feeding assembly, the printing head fixing base and a switching auxiliary device are arranged on the base plate; the feeding assembly is used for continuously pushing a filament material into the fixed printing head and the movable printing head for melting and extruding; and the switchingmechanism and the switching auxiliary device are used for up-and-down moving the movable printing head. According to the three-dimensional printer single-motor extrusion system capable of actively switching the printing head provided by the invention, through designing the movable printing head assembly and the fixed printing head assembly, the automatic switching of the two printing heads can berealized through switching the movable printing head; the movable printing head and the fixed printing head are independent so as to be free of being interacted; and the system is simple in structure, the printing accuracy is ensured, two filament materials can be printed alternately by only using one drive motor without the need for using any other external force except for the extrusion system,and the height difference of the two printing heads can be switched, so that the weight and the cost of the extrusion system are reduced.

Description

technical field [0001] The invention relates to a three-dimensional printer based on a fusion deposition rapid prototyping process, in particular to a three-dimensional printer single-motor extrusion system capable of actively switching print heads. Background technique [0002] The 3D printer based on the fusion deposition rapid prototyping process uses plastic filaments with a diameter of about 1-2 mm, and melts and extrudes the plastic filaments into filaments of about 0.2-0.4 mm through a computer-controlled printing extrusion head and prints them layer by layer. stacked into three-dimensional objects. Usually, the fused deposition rapid prototyping process needs to add supports when manufacturing objects with cantilever structures. If the extrusion head of the 3D printer only has a single melt channel 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 b...

AI Technical Summary

Problems solved by technology

But it is difficult to level the two print heads with this structure, it is easy to scratch the printed model, and the drool of the nozzle will seriously affect the surface quality of the model

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