公开(公告)号：US12220921B2

公开(公告)日：2025-02-11

申请号：US17780117

申请日：2020-11-10

Applicant: Korea Electronics Technology Institute

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

IPC: B41J2/21 ,  B41J2/165

Abstract: Provided is a nozzle clogging defect compensating method for compensating for a nozzle clogging defect appearing in a binder jetting stack manufacturing means. The nozzle clogging defect compensating method according to an embodiment of the present invention comprises the steps of: determining a defect occurrence region when a clogging defect of a nozzle used in the binder jetting stack manufacturing means occurs; determining whether compensation for the detect occurrence region is possible; when the compensation is possible, generating defect information and reflecting the defect information in an output code; setting a defect compensation region on the basis of the defect information; determining a defect compensation type of the defect compensation region; and reflecting a result of the determining in the output code. Accordingly, a replacement time and a replacement cost of an output head where the nozzle clogging defect has occurred can be saved, thereby reducing the unit production cost of a binder jetting type stack manufacturing output.

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.

公开(公告)号：US12233601B2

公开(公告)日：2025-02-25

申请号：US17256880

申请日：2019-08-29

Applicant: Korea Electronics Technology Institute

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

IPC: B29C64/386 ,  B33Y50/00 ,  G06F30/10 ,  G06F113/10 ,  G06T7/12 ,  G06T17/10

Abstract: Provided is a method for creating a 2D slicing polyline based support structure for 3D printing. A method for creating a support structure according to an embodiment of die present invention comprises: slicing a 3D model into a plurality of 2D layers; comparing the 2D layers to calculate a support position for each of the 2D layers; and creating supports at the calculated positions. As a result, the supports can be created at precise and meaningful positions, a stable output is possible, and additional slicing work is not necessary on the created supports, whereby improvement of speed can be expected.

公开(公告)号：US12202206B2

公开(公告)日：2025-01-21

申请号：US17623112

申请日：2021-11-03

Applicant: Korea Electronics Technology Institute

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

IPC: B29C64/393 ,  B33Y50/02 ,  G06T19/20

Abstract: Provided are a method and a system for solving a tolerance problem which may occur in a slicing quantization (staircase effect) process of 3D printing which slices a 3D model and laminates layers one by one. According to an embodiment of the present disclosure, a 3D model slicing method includes the steps of: receiving, by a 3D model slicing system, an input of data of a 3D model to 3D print; examining, by the 3D model slicing system, a dimension of a layer thickness of the inputted 3D model; correcting, by the 3D model slicing system, a size of a layer for slicing, based on a result of the examining; and slicing, by the 3D model slicing system, the corrected 3D model. Accordingly, by preserving a dimension within a layer thickness, a problem that a concavo-convex portion is lost in a slicing quantization process of 3D printing according to a slicing position within a layer thickness, and a tolerance occurs is solved.

公开(公告)号：US11548227B2

公开(公告)日：2023-01-10

申请号：US16499370

申请日：2018-03-27

Applicant: Korea Electronics Technology Institute

Inventor： Hwa Seon Shin ,  Sung Hwan Chun ,  Hye In Lee

IPC: B33Y50/02 ,  B29C64/386 ,  B33Y40/00 ,  B22F10/30

Abstract: Provided is a method for monitoring 3D printing equipped with a 3D printing slicer and a recursive loop structure. A 3D printing method according to an embodiment of the present invention sets up a slicing environment for 3D printing of a 3D model, generates a mechanical code by performing slicing according to the setup environment, monitors the status of the 3D printing according to the generated mechanical code, and, depending on the monitoring result, determines whether or not to re-perform the setup and subsequent steps. Accordingly, by semi- or fully automating the 3D printing engineering process, the time and effort for engineering performance involving human participation are reduced, and the human resource is concentrated on a more important area, such that the effects of enhancing the 3D printing output quality and assuring the quality can be expected.