Printing method of fused deposition modeling metal three-dimensional printer

Abstract

The invention provides a printing method of a fused deposition modeling metal three-dimensional printer. The metal three-dimensional printer comprises a printing head assembly and a consumable supplyassembly. The consumable supply assembly drives a first molding material and a second molding material to be conveyed into the printing head assembly. The first molding material comprises a metal material and a binder, and a second molding material is composed of fine sand or ceramic and an adhesive. The first molding material and the second molding material are arranged in a strip shape. The printing method is carried out in vacuum or inert gas. The printing method comprises the steps of printing a supporting part, printing a transition supporting part, printing a three-dimensional object, conducting degreasing, conducting sintering and removing the transition supporting part. A metal object is printed in a fused deposition modeling mode, the transition supporting part and the supportingpart are rapidly removed through a grinding machine and the surface of the printed object is polished on basis of the material temperature difference between the first molding material and the secondmolding material, so that the smoothness of the surface of the printed metal object is improved while the printing period is shortened.

Description

technical field [0001] The invention relates to a rapid prototyping method, in particular to a printing method of a fused deposition modeling metal three-dimensional printer. Background technique [0002] A 3D printer is a device based on a digital model of a 3D object, using materials such as plastic, liquid photocurable resin, and powdered metal to construct a 3D object by layer-by-layer printing. One of the three-dimensional printers of fused deposition modeling is to supply molding materials to the printing head in the form of filaments. The molding materials are heated to a molten state by electric heating in the printing head. The path that the print head moves relative to the stage prints a three-dimensional object layer by layer. [0003] When the existing fused deposition modeling metal 3D printers print objects with complex structures, especially some arc-shaped irregular curved surfaces or arched surfaces, it is necessary to fill support parts under the curved or...

AI Technical Summary

Problems solved by technology

However, since there is a fitting contact surface between the support part and the printed object, if the material of the support part is the same as that of the printed object, it is easy to cause the cutting contact surface to be damaged due to the material of the support part and the material of the printed object in the subsequent degreasing or heat treatment process. It is difficult to separate the printed object from the support part from the contact surface, so it is necessary to use an external tool to separate the support part from the printed object, which causes the overall surface of the printed object to be rough and affects printing. The overall appearance of the object, but also increases the cumbersomeness of the user's operation

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