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1. 发明专利

JP2000335953A CEMENT COMPOSITION FOR SPRAYING 失效
公开(公告)号：JP2000335953A
公开(公告)日：2000-12-05
申请号：JP14930199
申请日：1999-05-28
申请人： DENKI KAGAKU KOGYO KK
发明人： NIKAIDO TOMOKI , NOMOTO SADAO , TANAKA HIDEHIRO
IPC分类号： C04B28/02 , C04B28/00 , C04B111/00
摘要： PROBLEM TO BE SOLVED: To obtain the subject composition which scarcely rebounds or drops a mortar, can effectively be applied, can be applied thickly or in a large cross section, and hardly generates cracks, by adding a specific amount of ultrafine particles and a specified amount of a thickener to a cement. SOLUTION: This cement composition for spraying comprises 100 pts.wt. of a cement, 1 to 10 pts.wt. of a ultrafine substance and 0.05 to 1 pt.wt. of a thickener. The composition may further contain 1 to 10 pts.wt. (solid content) of a polymer dispersion for mixing the cement and/or 3 to 10 pts.wt. of an expanding material. The cement includes a conventional cement. The ultrafine substance includes silica fume and silica dust, and has an average particle diameter of

2. 发明专利

JP2001114543A CEMENT ADMIXTURE FOR UNDERWATER CONCRETE, AND METHOD FOR PRODUCING UNDERWATER CONCRETE BY USING THE SAME 失效
公开(公告)号：JP2001114543A
公开(公告)日：2001-04-24
申请号：JP29057899
申请日：1999-10-13
申请人： DENKI KAGAKU KOGYO KK
发明人： TANAKA HIDEHIRO , NIKAIDO TOMOKI , TAMAKI TOSHIYUKI
IPC分类号： C04B24/26 , C04B22/08 , C04B28/00 , C04B28/02 , C04B111/74
摘要： PROBLEM TO BE SOLVED: To obtain a cement admixture for an underwater concrete, capable of providing a concrete hardly flowing out from a chink such as the chink of a molding box, and the chink such as a crack, hardly causing the separation of the materials and capable of providing a stable quality, even when the concrete is applied to the position at which the water is present, and further to provide a method for producing the underwater concrete by using the admixture. SOLUTION: This cement admixture for the underwater concrete comprises a polyvinyl alcohol and a boron compound, and the cement composition comprises the cement and the cement admixture. The method for producing the underwater concrete is characterized by adding either one component of the cement admixture to the cement, and forcibly feeding the resultant mixture, also forcibly feeding the other component by different passage, and joining both at the tip part and mixing the joined components when producing the underwater concrete.

3. 发明专利

JPH0824692A METHOD AND VESSEL FOR CRUSHING 失效
公开(公告)号：JPH0824692A
公开(公告)日：1996-01-30
申请号：JP10738995
申请日：1995-05-01
申请人： DENKI KAGAKU KOGYO KK
发明人： NIKAIDO TOMOKI , TSUTSUMI ATSUSHI , SUZUKI MASAHARU
IPC分类号： B02C17/00 , B02C17/08
摘要： PURPOSE:To manufacture simply a crushed product provided with a sharp grain size distribution in a short time even when a material to be crushed is a hard substance such as cubic boron nitride. CONSTITUTION:In the crushing method using a planetary mill in which a material to be crushed is fed into a crushing vessel having both of revolution axis and rotation axis in the vertical direction, and crushing is carried out by revolving the vessel, the crushing vessel is divided into two or three or more chambers by a mesh screen, and the material to be crushed and a crushing medium are fed into the above-referred one or two or more chambers, and crushing is carried out while varying the number of revolutions of the crushing vessel. The crushing vessel for a planetary mill is divided into two or three or more upper and lower chambers by the mesh screen. Further in the crushing method or the crushing vessel for the planetary mill, a tapered face or a curved face is formed at least on the bottom section inner face of a chamber into which the crushing medium is fed.

4. 发明专利

JPH0570254A PRODUCTION OF HIGH HARDNESS LAMINATED BODY FOR TOOL 失效
公开(公告)号：JPH0570254A
公开(公告)日：1993-03-23
申请号：JP8584891
申请日：1991-03-27
申请人： DENKI KAGAKU KOGYO KK , JAPAN RES DEV CORP
发明人： SUZUKI MASAHARU , NIKAIDO TOMOKI , TANJI HIROAKI
IPC分类号： C04B35/583 , C04B35/58 , C04B35/626 , C04B37/00
摘要： PURPOSE:To produce a high hardness laminated body for a tool made of a joined body of a cubic BN sintered body and a hard sintered body by a single treatment at a high temp. under an ultrahigh pressure. CONSTITUTION:A low pressure phase BN molded body, a middle layer of a transition metal or a compd. thereof and a hard sintered body or a hard molded body are piled, filled into a reactor and treated at a high temp. under a static ultrahigh pressure to produce a joined body of a cubic BN sintered body and a hard sintered body. The low pressure phase BN molded body has

5. 发明专利

JPH0931446A GRINDING GRAIN 失效
公开(公告)号：JPH0931446A
公开(公告)日：1997-02-04
申请号：JP18897895
申请日：1995-07-25
申请人： DENKI KAGAKU KOGYO KK
发明人： SUZUKI MASAHARU , OKAMOTO TETSUYA , NIKAIDO TOMOKI
IPC分类号： B24D3/00 , C09K3/14
摘要： PROBLEM TO BE SOLVED: To obtain a grinding grain composed of a grinding grain of boron nitride of multicrystal cubic having a specific magnesium content and a grinding grain of boron nitride of monocrystal cubic, having a stable and small grinding resistance, excellent in abrasion resistance and useful for a metal-bond grind stone, an electro plated grind stone, etc. SOLUTION: This grinding grain is composed of (A) a boron nitride grinding grain of multicrystal cubic whose magnesium content is =99.9% combinedly used as a reaction section and a heater, etc., and wrapped with a tantalum foil at high temperature under high pressure in a stable region of the cubic boron nitride.

6. 发明专利

JPH07299577A LASER MACHINING METHOD OF CUBIC NITRIDE BORN SINTERED BODY 失效
公开(公告)号：JPH07299577A
公开(公告)日：1995-11-14
申请号：JP9508194
申请日：1994-05-09
申请人： DENKI KAGAKU KOGYO KK
发明人： NIKAIDO TOMOKI , SUZUKI MASAHARU
IPC分类号： B23K26/40 , B23K26/12 , B23K26/38 , B23K26/00
摘要： PURPOSE:To execute machining of cutting, etc., in short time and to easily make unmanned operation possible by executing machining of a cubic nitride boron sintered body with irradiation of laser beam in nitrogen or inert gas atmosphere. CONSTITUTION:In the case the machining of cutting, etc., is executed in a nitrogen or inert gas atmosphere, metal boron is precipitated in cutting face because there is no oxygen to combine with boron. Because this metal boron can efficiently absorb an energy of laser beam so as to keep the cutting face to high temp., even in case of cBN sintered body by direct conversion method, it can be machined like cutting, etc., by low output laser beam. For example, while argon gas is blown on the cutting face of cBN sintered body by direct conversion method, the cutting face is continuously irradiated with YAG laser beam and is cut at a cutting rate of 2mm/min. As a result, near the cut surface there is no generation of chipping, crack, etc., the cutting margin is 100mum at the upper surface on which a laser beam is made incidene and 107mum for the rear surface.

7. 发明专利

JPH07291735A POLYCRYSTALLINE CUBIC BORON NITRIDE SINTERED COMPACT AND USE THEREOF 失效
公开(公告)号：JPH07291735A
公开(公告)日：1995-11-07
申请号：JP8298494
申请日：1994-04-21
申请人： DENKI KAGAKU KOGYO KK
发明人： SUZUKI MASAHARU , NIKAIDO TOMOKI , HIRUTA KAZUYUKI
IPC分类号： B23B27/14 , B23Q1/26 , B24D3/00 , C04B35/583 , C09K3/14 , F16C33/24
摘要： PURPOSE:To obtain a polycrystalline cBN sintered compact, abrasive particles, a cutting tool and a sliding material each excellent in strength and wear resistance and having a long service life and high precision. CONSTITUTION:This polycrystalline cBN sintered compact has

8. 发明专利

JPH05311154A 失效
公开(公告)号：JPH05311154A
公开(公告)日：1993-11-22
申请号：JP13559392
申请日：1992-04-30
申请人： DENKI KAGAKU KOGYO KK
发明人： SUZUKI MASAHARU , NIKAIDO TOMOKI
IPC分类号： B24D3/00 , C04B35/583 , C04B35/5831 , C09C1/68 , C09K3/14 , C04B35/58
摘要： PURPOSE:To provide abrasive grains capable of giving high-precision grinding wheels longer in service life than conventional ones even if used under severe conditions such as heavy grinding or high-speed grinding, consisting of polycrystalline boron nitride of cubic system having specific primary crystal grains. CONSTITUTION:The abrasive grains consisting of polycrystalline boron nitride of cubic system (CBN)

9. 发明专利

JPH0931444A GRINGING GRAIN 失效
公开(公告)号：JPH0931444A
公开(公告)日：1997-02-04
申请号：JP18897695
申请日：1995-07-25
申请人： DENKI KAGAKU KOGYO KK
发明人： SUZUKI MASAHARU , OKAMOTO TETSUYA , NIKAIDO TOMOKI
IPC分类号： B24D3/00 , C09K3/14
摘要： PROBLEM TO BE SOLVED: To obtain a grinding grain composed of a grinding grain of boron nitride of multicrystal cubic having a specific: silicon content and a grinding grain of boron nitride of monocrystal cubic, having a stable and small grinding resistance, excellent in abrasion resistance and useful for a metal-bond grind stone, an electro plated grind stone, etc. SOLUTION: This grinding grain is composed of (A) a baron nitride grinding grain of multicrystal cubic whose silicon content is =99.9%, combinedly used as a reaction section and a heater, etc., and wrapped with a tantalum foil at high temperature under high pressure in a stable region of the cubic boron nitride.

10. 发明专利

JPH0931443A GRINDING GRAIN 失效
公开(公告)号：JPH0931443A
公开(公告)日：1997-02-04
申请号：JP18897595
申请日：1995-07-25
申请人： DENKI KAGAKU KOGYO KK
发明人： SUZUKI MASAHARU , OKAMOTO TETSUYA , NIKAIDO TOMOKI
IPC分类号： B24D3/00 , C09K3/14
摘要： PROBLEM TO BE SOLVED: To obtain a grinding grain composed of a grinding grain of boron nitride of multicrystal cubic having a specific ratio of constituting elements and a grinding grain of boron nitride of monocrystal cubic, having a stable and small grinding resistance, excellent in abrasion resistance and useful for a metal-bond grind stone, an electro plated grind stone, etc. SOLUTION: This grinding grain is composed of (A) a boron nitride grinding grain of multicrystal cubic having a molar ratio of boron to nitrogen (B/N molar ratio) of 0.95-1.00 and (B) a boron nitride grinding grain of monocrystal cubic. For instance, the component B is contained in an amount of 20-90wt.% based on the total of the grinding grains. The component A is obtained e.g. by treating a thermally decomposed boron nitride, whose B/N ratio is controlled, at high temperature under high pressure in a stable region of the cubic boron nitride.

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