A printing method and device for a 3D object with a suspended structure

Abstract

The invention provides a printing method for a 3D object. The printing method comprises the following steps of a, an interface layer material is used for printing an interface layer on the basis of interface layer data, a non-interface layer material is used for printing a non-interface layer based on non-interface layer data, at least a part of a layer supporting result is composed of the interface layer and the non-interface layer, and the interface layer is used for isolating the non-interface layer from a layer printing result, wherein the layer printing result is printed by using a forming material, physical properties of the interface layer material and the forming material which are in mutual contact are different, and the physical properties of the interface layer material are different from those of the non-interface layer material; and b, the step a is repeated to form the multiple layer supporting results and the multiple layer printing results, and the multiple layer printing results and the multiple layer supporting results are overlapped with each other to form the 3D object. The printing method has the advantages that the 3D object with high precision and a complex structure can be printed.

Description

technical field [0001] The invention relates to the technical field of rapid prototyping of 3D objects, in particular to a method and device for printing a 3D object with a suspended structure. Background technique [0002] Rapid prototyping technology, also known as rapid prototyping technology or additive manufacturing technology, is based on the basic principles of 3D model slicing and data processing, and finally makes 3D objects by layer-by-layer processing and stacking. [0003] According to the shape difference of the target 3D object, there are differences in the specific production process. The first method is: in the production process of the target 3D object, only the molding material is used to print each layer, and the latter layer of molding material is superimposed on the previous layer of molding material. , and finally make the target 3D object; the second method is: in the process of making the target 3D object, there is a phenomenon that the latter layer i...

AI Technical Summary

Problems solved by technology

[0005] The first solution is: choose a non-water-soluble material for the molding material, and a water-soluble material for the support material. After the target 3D object is printed, place the target 3D object in water, and the support structure will slowly dissolve in the water and finally be removed from the target 3D object. Remove, as U.S. Patent US6569373B2, US9138981B1 and US8460451B2 etc., yet the disadvantage of using this method to remove the support structure is: on the one hand the support structure dissolves relatively slowly in water, on the other hand wastes water resources and has the effect of polluting the water body risk

[0008] The fourth solution is: choose a support material with a mechanical property different from that of the molding material. For example, the strength and / or hardness of the support material is lower than that of the molding material, or the support material is more brittle than the molding material. After the target 3D object is printed Use mechanical force to remove the support structure. However, since the support structure provides support for the target object during the printing process of the target object, its lower strength and / or hardness is difficult to support the entire target object, and it is easy to cause deformation of the target object and affect the molding accuracy. , or the support material is more brittle, and the support structure is easy to crack during the support process, which affects the forming accuracy of the target object

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