Multifunctional spray-head for 3D printer

Abstract

The invention provides a multifunctional spray-head for a 3D printer. The multifunctional spray-head for the 3D printer comprises a bracket, a nozzle assembly arranged on the bracket, a heating assembly, a feeding assembly, a heat dissipating assembly and a detecting assembly, wherein the nozzle assembly comprises a nozzle and a throat pipe, and the heating assembly is arranged between the nozzle and the throat pipe and used for heating a nozzle melting chamber; the feeding assembly comprises a printing wire guide pipe, an extruder gear, a rotary wheel matched with the extrude gear and a driving motor used for driving the extruder gear; the axes of the printing wire guide pipe, the throat pipe and the nozzle are in the same line, the extruder gear and the rotary wheel are arranged between the printing wire guide pipe and the throat pipe, and are used for sending a printing wire to the throat pipe via the printing wire guide pipe; and the heat dissipating assembly is used for cooling the throat pipe, and the detecting assembly is used for detecting whether the printing wire penetrates through the printing wire guide pipe or not and whether the rotary wheel rotates or not. The spray-head gathers the functions of wire feeding, wire seizing / breaking detection, automatic height finding and leveling, and has the advantages of small volume, light weight, big wire feeding strength, and high print material adaptability.

Description

technical field [0001] The invention relates to the field of 3D printing equipment, in particular to a multifunctional nozzle for a 3D printer. Background technique [0002] 3D printing technology is actually a general term for a series of rapid prototyping technologies. Its basic principle is stacked manufacturing. The rapid prototyping machine forms the cross-sectional shape of the workpiece through scanning in the X-Y plane, and the layer thickness is measured intermittently in the Z coordinate. displacement, and finally form a three-dimensional workpiece. Rapid prototyping technologies currently on the market are divided into 3DP technology, FDM fusion lamination molding technology, SLA stereolithography technology, SLS selective laser sintering and so on. [0003] FDM fusion lamination molding technology is to heat and melt the filamentous hot-melt material, and at the same time, under the control of the computer, the three-dimensional nozzle selectively coats the mate...

AI Technical Summary

Problems solved by technology

[0004] At present, 3D printers based on the FDM principle often encounter the following problems in use: ①During the printing process, due to the slipping of the wire feed wheel, the nozzle does not produce filament or the filament is intermittent; Printing failure; ③ wire jam caused by insufficient torque of the wire feeding motor; ④ machine instability caused by large and overweight nozzles, poor model printing quality, etc.; ⑤ inconvenient maintenance; ⑥ height measurement and leveling modules are too complicated and structural flaws

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