Novel spray nozzle of 3D printer

Abstract

The invention relates to a novel spray nozzle of a 3D printer. The novel spray nozzle is good in heat dissipation, and melted consumables are hardly under resistance in the downward-extruding processbecause of the non-sticking characteristic of polytetrafluoroethylene, so that the extruded melted consumables are uniform, the printing accuracy is ensured accordingly, and the surface of a printed workpiece is specially fine and smooth. According to the scheme, the novel spray nozzle comprises a jet nozzle and a heating device arranged on the jet nozzle in a sleeving mode, a stainless steel pipecommunicating with a jet cavity in the jet nozzle is fixed to the upper end of the jet nozzle, the upper end of the stainless steel pipe communicates with a raw material guiding pipe, and the stainless steel pipe is sleeved with an aluminum alloy heat dissipating head. The novel spray nozzle is characterized in that heat dissipation fins are arranged on the aluminum alloy heat dissipating head, apolytetrafluoroethylene pipe is arranged in the stainless steel guiding pipe in a penetrating mode, the upper end of the polytetrafluoroethylene pipe communicates with the raw material guiding pipe,and the lower end of the polytetrafluoroethylene pipe is arranged at the upper end of the jet cavity of the jet nozzle.

Description

technical field [0001] The invention relates to a 3D printer, in particular to a novel spray head of a 3D printer. Background technique [0002] In the environment where 3D printing has become a new type of processing technology, people's requirements for printing accuracy are getting higher and higher. At present, the number of 3D printers based on FDM technology is the largest, but most of the printing quality is very average now. There are two reasons for this: mechanical precision and the smoothness of the nozzle extruding molten plastic filaments. The mechanical precision mainly depends on the rationality of the design and the precision of parts processing, while the problem of the nozzle is mainly solved by the rationality and innovation of the design. The inner diameter of the stainless steel tube in the traditional 3D printer nozzle is 2 mm, and the outer diameter is 6 mm. Adding PTFE tubes, the melted material in the extruder is easy to be blocked in the stainless ...

AI Technical Summary

Problems solved by technology

The mechanical precision mainly depends on the rationality of design and the precision of parts processing, while the problem of the nozzle is mainly solved by the rationality and innovation of the design. The inner diameter of the stainless steel tube in the traditional 3D printer nozzle is 2 mm, and the outer diameter is 6 mm. Adding PTFE tubes, the melted material of the extruder is easily blocked in the stainless steel tubes during the downward feeding process, and the heat dissipation behind the tubes is not good, and the surface of the printed workpiece is very rough. The consumables are fed one after another, and the wire is not evenly produced.

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