公开(公告)号：US20180065172A1

公开(公告)日：2018-03-08

申请号：US15119340

申请日：2016-02-15

Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING

Inventor： Yasuhiro NAGAI ,  Yuuki HATORI ,  Yoshikazu OOBA ,  Toshimitsu OKANE

IPC: B22C9/10 ,  B22C9/12 ,  B22C9/02 ,  B22C1/18

CPC classification number: B22C9/10 ,  B22C1/18 ,  B22C9/02 ,  B22C9/12 ,  B28B1/001 ,  B28B7/346 ,  B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  Y02P10/292

Abstract: Provided is a granular material which generates no harmful gas at the time of pouring, reduces a gas defect as one of casting defects, and is readily reusable after pouring, in the manufacture of a three-dimensional laminated and shaped mold. This granular material is a granular material for use in a three-dimensional laminated and shaped mold manufacturing apparatus, and includes magnesium sulfate. The amount of magnesium sulfate included in the granular material is 1 to 10 pts·mass with respect to 100 pts·mass of the granular material. The amount of water included in the granular material is 0.1 mass % or less except for crystallization water of magnesium sulfate.