A kind of three-dimensional printing method

Abstract

The present invention relates to the molding technology in the three-dimensional printing technology, in particular to a three-dimensional printing method for instantly generating the required molten raw materials through resistance heating during the three-dimensional printing process, which can realize three-dimensional printing of high melting point materials, and belongs to the additive manufacturing technology field. It is characterized in that an electric current is applied between the solid raw material and the printing body, and the solid raw material between the guiding device and the printing body is partially or completely heated to a molten state through resistance heating, and the solid raw material between the guiding device and the printing body The space between produces molten material; wherein, in the process of accumulating molten material: the area of ​​the printed body that is about to accumulate molten material and / or is accumulating molten material is heated; or, the printed body is heated; or, the printed body is heated. The area of ​​the body that is about to accumulate molten material and / or that is accumulating molten material is heated, and the printed body is heated.

Description

technical field [0001] The present invention relates to the molding technology in the three-dimensional printing technology, in particular to a three-dimensional printing method for instantly generating the required molten raw materials through resistance heating during the three-dimensional printing process, which can realize three-dimensional printing of high melting point materials, and belongs to the additive manufacturing technology field. Background technique [0002] 3D printing technology first originated in the United States at the end of the 19th century, and was perfected and gradually commercialized in Japan and the United States in the 1970s and 1980s. Common mainstream 3D printing technologies, such as stereolithography (StereoLithography Apparatus, SLA), fused deposition manufacturing (Fused Deposition Modeling, FDM), selective laser sintering (Selecting Laser Sintering, SLS), three-dimensional powder bonding (Three DimensionalPrinting and Gluing, 3DP), was c...

AI Technical Summary

Problems solved by technology

In view of the shortcomings of the above-mentioned SLM and EBM technologies, there have also been many low-cost metal 3D printing technologies using other forming methods, for example, the application number is 201510789205.7, and the name is "a method and device for direct 3D printing and manufacturing using liquid metal" Chinese patent application, application number 201510679764.2, titled "A Metal 3D Printing Rapid Prototyping Equipment", and application number 201410206527.X, titled "Extrusion Metal Flow 3D Printer" However, these technologies have problems such as low molding accuracy or low interlayer bonding of the printed metal layer, and cannot print high melting point materials (such as tungsten alloy materials)

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