公开(公告)号：US20220410574A1

公开(公告)日：2022-12-29

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: B41J2/165 ,  B41J2/21

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：US20220410485A1

公开(公告)日：2022-12-29

申请号：US17780206

申请日：2020-11-10

Applicant: Korea Electronics Technology Institute

Inventor： Hye In LEE ,  Sung Hun PARK ,  Hwa Seon SHIN ,  Sung Hwan CHUN ,  Jin Min JANG

IPC: B29C64/386 ,  B33Y50/02 ,  G06T3/00

Abstract: Provided is a slicing 2D data-based pattern application method for generating an output code in which the inside of a model is filled with a pattern, so as to reduce a binder usage amount and maintain a strength and a shape in sand binder jetting additive manufacturing. A slicing 2D data-based pattern application method according to an embodiment of the present invention comprises the steps of: generating 2D data by slicing an output model; generating an inner pattern in at least one of layers forming an output model in consideration of the set thickness of the layers and the outer thickness thereof and generating an output code by applying the generated inner pattern. Therefore, the cost of producing an additive manufacturing output can be reduced by reducing the binder usage amount through the application of the inner pattern. In addition, reducing the binder usage amount enables a mold to be destroyed with less force than conventionally used, can increase the proportion of molding sand reuse by reducing the binder usage amount, and can reduce recovery treatment costs of the molding sand. Furthermore, casting defects due to increased ventilation can be reduced.