Printing head heating device and heating method of 3D (Three-dimensional) printer based on eddy-current effect

Abstract

The invention provides a printing head heating device and a heating method of a 3D (Three-dimensional) printer based on an eddy-current effect. The device comprises a spray head (1), a coil (2), a heating block (3), a throat pipe (4), a power supply (5), a temperature control system (6) and a temperature measurement sensor (7), wherein alternating current is charged in the coil (2), the heating block (3) generates eddy-current heating under the eddy-current effect, and a wire is heated and melted in a cavity of the spray head (1); the temperature measurement sensor (7) measures the real-time temperature of the heating block (3) and feeds back to the temperature control system (6); the temperature control system (6) controls the heating temperature according to setting temperature and current in the temperature-adjusting coil (2) measured by the temperature measurement sensor (7). By adopting the heating device and the heating method provided by the invention, the heating temperature can be controlled easily, the heating efficiency is high, the wire melting stability is realized, so that the printing resolution is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of 3D printers, and in particular relates to a printing head heating device of a fused deposition modeling 3D printer based on eddy current effect. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is based on digital model files, using laser beams, hot-melt nozzles, etc. to accumulate and bond special materials such as metal powder, ceramic powder, plastic, and cell tissue layer by layer. The final superimposed molding creates a physical product. Today, 3D printing technology has been widely used in mold manufacturing, industrial design, aerospace, culture and art, sculpture and other fields. [0003] According to the different molding methods, 3D printing technology can be divided into stereolithography (SLA), laminated object manufacturing (LOM), selective laser sintering (SLS), fused deposition modeling (FDM) and so on. The most essential difference between Fused D...

AI Technical Summary

Problems solved by technology

But at the same time, there is the problem of uneven heating caused by linear heating, which leads to uneven or incomplete melting of printing materials, which adversely affects printing accuracy and easily clogs the nozzle.

At the same time, the way of resistance heating still has the problems of large loss and low heating efficiency.

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