公开(公告)号：US11798231B2

公开(公告)日：2023-10-24

申请号：US17623104

申请日：2020-11-10

Applicant: Korea Electronics Technology Institute

Inventor： Hye In Lee ,  Hwa Seon Shin ,  Sung Hwan Chun ,  Sung Hun Park ,  Ji Min Jang

IPC: G06T17/20 ,  G06T7/20

CPC classification number: G06T7/20

Abstract: Provided is a method for generating a hollow structure of a 3D model on the basis of a 2D laminated cross-sectional outline to reduce the amount of using a material or the weight of a printed matter during laminating and manufacturing. The method for generating a hollow structure based on a 2D laminated cross-sectional outline, according to an embodiment of the present invention, comprises the steps of: slicing the 3D model; generating a hollow structure outline on the basis of the result of the slicing; detecting an overhang area between adjacent hollow structure outlines; recalculating the hollow structure outline according to the result of detecting the overhang area; and generating a hollow structure mesh on the basis of the recalculated hollow structure outline. Accordingly, because 2D laminated cross-sectional data is used, a hollow structure can be generated without separate data processing, thereby reducing a calculation burden. In addition, because the hollow structure is processed so that an overhang area is not generated when generating the hollow structure, a support is not needed therein, thereby making post-processing easy.

公开(公告)号：US11613082B2

公开(公告)日：2023-03-28

申请号：US17256849

申请日：2020-02-20

Applicant: Korea Electronics Technology Institute

Inventor： Hwa Seon Shin ,  Hye In Lee ,  Sung Hwan Chun ,  Ji Min Jang ,  Sung Hun Park

IPC: B29C64/386 ,  B29C64/40 ,  B33Y50/02 ,  G06T17/20 ,  B22F10/38 ,  B22F10/47 ,  B22F10/80 ,  G06T19/20 ,  B33Y50/00

Abstract: A method for producing a support structure of a 3D model for 3D printing is provided. A method for producing a support according to an embodiment of the present invention comprises the steps of: dividing a surface constituting a 3D model into multiple surface patches; classifying respective divided surface patches according to geometric characteristics; and producing supports corresponding to the classified characteristics with regard to respective surface patches. Accordingly, during metal laminate manufacturing, the output stability may be improved while reducing the support producing process time. In addition, the surfaces may be expressed by different colors according to the result of geometric characteristic classification, and the supports may also be expressed by different colors according to the type, thereby playing the role of guide lines such that the user can recognize the shape of the surfaces and the type of supports to be installed on the corresponding surfaces. Moreover, the size of a support tip is determined in view of the thickness of the area in which a support is to be produced, thereby preventing the problem of output quality degradation which would otherwise occur because the support cannot move upwards through an output part.