A support-free 3D printing method

Abstract

The invention relates to a support-free 3D printing method. The support-free 3D printing method at least includes the following steps that a light-sensitive material is unfolded to form a material film layer with the uniform thickness, the material film layer is exposed through a light source according to a slice pattern, and printing of a first layer of a 3D model is completed; the non-exposed part of the material film layer serves as the starting layer for printing of a second layer of the 3D model, and the second layer of the 3D model is printed according to the same printing method of thefirst layer; the non-exposed part of the material film layer during printing of the second layer serves as the starting layer for printing of a third layer of the 3D model, and the third layer of the3D model is printed according to the same printing method of the second layer; and the cycle is repeated in this way until the 3D model is printed. According to the 3D printing method, the gel state of the light-sensitive material is used as a support, addition of a support is not needed, printing difficulty is greatly lowered, and the success rate is improved. As no support is added, detachment of a support is not needed, and a printed part is more beautiful.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a support-free 3D printing method. Background technique [0002] Traditional photosensitive 3D printing materials are liquid photosensitive substances with good fluidity, which turn from liquid to solid after being illuminated. The photosensitive 3D printer completes the printing by exposing the 3D model layer by layer with a certain layer thickness. During the printing process, the traditional photosensitive 3D printing material undergoes a photocrosslinking reaction after exposure and changes from liquid to solid. This process is irreversible. After one layer is printed, the next layer is printed, and the next layer and the previous layer Bonding, and finally the entire model is printed. During the printing process, if you encounter the first floating point, you need to use supports to fix the point, and print layer by layer until the point is bonded to the main body. ...

AI Technical Summary

Problems solved by technology

Due to the particularity of some models, it is difficult to add support, or it is difficult to remove after adding, that is, the quality of the support will seriously affect the final printing effect

Too little support will lead to partial loss or deformation of the model. Excessive support will not only waste materials, but also cause inconvenience to the removal of support later. Therefore, the addition of support has become a recognized technical difficulty in the 3D printing industry, which limits the development of the entire industry.

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