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公开(公告)号:JPH03279248A
公开(公告)日:1991-12-10
申请号:JP8232990
申请日:1990-03-28
申请人: TOUBU KAGAKU KK
发明人: KOBORI SHIGEJI
IPC分类号: B22C9/02 , B22C7/00 , B28B7/34 , B29C33/38 , C04B14/00 , C04B16/00 , C04B22/10 , C04B24/00 , C04B24/06 , C04B24/12 , C04B24/16 , C04B24/22 , C04B24/24 , C04B24/28 , C04B26/16 , C04B28/06 , C04B28/14 , C04B28/18
摘要: PURPOSE:To obtain a material capable of readily forming a mold by casting close in physical properties to wooden mold and readily carrying out ejection after casting by blending gypsum and/or an alumina cement with a filler, alkylsulfonic acid salt, chelete agent, hydrophilic urethane and water at a specific ratio. CONSTITUTION:The aimed mold material is obtained by blending 100 pts.wt. gypsum and/or alumina cement with 0-1000 pts.wt. inorganic or organic filler, 0.001-1.0 pt.wt. alkylsulfonic acid salt or derivative thereof, 0.001-5 pts.wt. chelete agent, 0.5-15 pts.wt. hydrophilic urethane and 25-150 pts.wt. water. The hydrophilic urethane includes preferably a liquid polyurethane prepolymer having 1000-8000 molecular weight. The chelete agent includes EDTA.2Na, salts of citric acid or tartaric acid.
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公开(公告)号:JPH03242389A
公开(公告)日:1991-10-29
申请号:JP3805090
申请日:1990-02-19
申请人: KANESHIMA TAKEO
发明人: KANESHIMA TAKEO
摘要: PURPOSE:To enlarge particle size of sand, to improve water permeability of sand and to extremely shorten drying time without reducing strength of sand by coating the surface of sand with a silicate compound and then baking. CONSTITUTION:The surface of sand is coated with a silicate compound and the sand is baked. A solution of glaze used in the production of ceramics is used as the silicate compound, attached (dipping or spraying method) to the surface of sand and baked. The baking, for example, is carried out by using a rotary furnace and heating at about 1,000 deg.C.
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公开(公告)号:JPH0259356B2
公开(公告)日:1990-12-12
申请号:JP14242683
申请日:1983-08-05
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公开(公告)号:JPS6245849A
公开(公告)日:1987-02-27
申请号:JP18636085
申请日:1985-08-23
发明人: HORIE AKIRA , KANEOKA KENJI , TAKENAKA FUMIYA , SEI MIKIO
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公开(公告)号:JPS6034586A
公开(公告)日:1985-02-22
申请号:JP14242583
申请日:1983-08-05
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