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1. 发明专利

JP2001277252A METHOD FOR PRODUCING CAVITY FORMING MOLD, CAVITY FORMING MOLD, AND RESIN MOLDING 失效
公开(公告)号：JP2001277252A
公开(公告)日：2001-10-09
申请号：JP2000092717
申请日：2000-03-30
申请人： SUWA NETSUKOGYO KK , NAGANO PREFECTURE , SUMITOMO COAL MINING , NISSIN KOHKI CO LTD
发明人： MIYASAKA KAZUHISA , MIYASAKA YOSHITO , KARASAWA HITOSHI , FUCHITA TADAMASA , NISHIYAMA FUMITAKE , YAMAMOTO JUNICHI , YAJIMA YOICHI , FURUHATA HAJIME , TOKITA MASAO , MIYAMOTO SHINICHI , TANI MASAHITO
IPC分类号： B29C33/38 , B22F3/105 , B22F3/14 , B22F5/00
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a cavity forming mold for molding a resin which can reduce production costs and improve a yield by implementing mechanical processing such as diamond bite cutting processing precisely even without implementing electroless nickel-phosphorus plating, the cavity forming mold, and a resin molding. SOLUTION: In the method for producing the cavity forming mold 4, a part to be subjected to diamond bite cutting such as a cavity forming surface 44 in the prototype 40 of the mold 4 is formed from a nickel-phosphorus sintered body 15. In the boundary part between the sintered body 15 and a base material, by continuously changing the component ratio between powder 10 for nickel- phosphorus sintering used for discharge plasma sintering and sintered iron powder 44 constituting the base material 44, the sintered body 15 and the base material 44 are joined together slantingly.

2. 发明专利

JPH10100309A SINTERED HARD ALLOY COMPOSITE MATERIAL 失效
公开(公告)号：JPH10100309A
公开(公告)日：1998-04-21
申请号：JP28139996
申请日：1996-10-02
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO , MATSUI SHIGERU
IPC分类号： B23B27/14 , B22F7/08 , B23K9/00 , B23K15/00 , B23K20/00 , B23K20/12 , B23K31/00 , B32B15/01
摘要： PROBLEM TO BE SOLVED: To disperse and relax residual stress generated in a sintered hard alloy material in a bonding and cooling process not only to improve bonding strength but also to prevent a flaw such as a crack by providing a dividing surface extending in a direction vertical and/or oblique to a bonding surface to the ferrous material bonded to a sintered hard alloy material. SOLUTION: The ferrous materials 3 bonded to a sintered hard alloy material 2 have dividing surfaces 6 extending in the direction vertical to a bonding surface 5 and the dividing faces 6 have a gap 7 and may be extended in the direction oblique to the bonding surface 5 and the dividing surface 6 extending in a vertical direction and the dividing surface 6 extending in an oblique direction may be combined. When carbon steel is sintered to be bonded to the sintered hard alloy material obtained by filling the material loading part of an electrification sintering mold die with an WC-Co alloy powder and by sintering it through electrification this powder, deformation or a crack is not generated in the sintered hard alloy and a sintered hard alloy composite material of a sufficient bonding strength can be obtained.

3. 发明专利

JPH09300024A COMPLEX TOOL MATERIAL JOINING STEEL AND CEMENTED CARBIDE AND PRODUCTION THEREOF 失效
公开(公告)号：JPH09300024A
公开(公告)日：1997-11-25
申请号：JP14076996
申请日：1996-05-10
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO
IPC分类号： B21D28/14 , B21D37/01 , B21D37/20 , B22F3/10 , B22F3/105 , B22F7/04 , B32B15/01 , C22C29/08
摘要： PROBLEM TO BE SOLVED: To obtain a high hardness and high toughness complex tool which improves the joined force with a steel and services an intermediate layer part as residual stress releasing layer, by arranging a cemented carbide having much weldable bonding phase quantity with the steel at a part contacting with the steel of a base material and joining the high hardness and high resistant cemented carbide through the intermediate layer. SOLUTION: The cemented carbide working part 1 of the complex tool is consttuted with a wear resistant layer 1a composed of a WC base cemented carbide containing

4. 发明专利

JPH07216409A ELECTRIC DISCHARGE PLASMA SINTERING METHOD AND DEVICE THEREFOR 失效
公开(公告)号：JPH07216409A
公开(公告)日：1995-08-15
申请号：JP3412994
申请日：1994-02-07
申请人： SUMITOMO COAL MINING
发明人： MATSUI SHIGERU , TOKITA MASAO , AKASHI TAMOTSU , TANI MASAHITO
IPC分类号： C04B35/64 , B22F3/10 , B22F3/105 , B22F3/14
摘要： PURPOSE:To perform an efficient sintering operation by eliminating the current concentration to the front end of a punch and averting overheating of the front end even if the punch is rapidly heated up by impressing a large current thereto. CONSTITUTION:This device is constructed to have the front end 5 where the punch 2 is inserted into a material charging part 3 of a molding die 7 and a base part 6 which is larger in sectional area than the front end in the case of obtaining a sintered compact by pressuring and compressing a powder material M charged into a molding die 1 by means of the punch 2, then impressing the pulse current through the punch 2. The molding die 1 has the material charging part 3 and the end 4 to be fitted with the base part 6 of the punch 2.

5. 发明专利

JPH1112606A ENERGIZATION SINTERING METHOD 失效
公开(公告)号：JPH1112606A
公开(公告)日：1999-01-19
申请号：JP18304797
申请日：1997-06-24
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , TANI MASAHITO , MATSUI SHIGERU
IPC分类号： C04B35/64 , B22F3/14
摘要： PROBLEM TO BE SOLVED: To provide a sintered body of the uniform structure and characteristic by energizing the surface in which the powder material is brought into contact with a forming die and/or punch through an electric insulation layer to eliminate formation of a degraded layer in a surface layer part of the sintered body. SOLUTION: Electric insulation layers 4, 5 which are formed by applying the powder of the electric insulation material in a sprayed condition are interposed at least on the contact part of a forming die 1 with the powder material M, and the surfaces of punches 2, 3 in contact with the powder material M. The electric insulation material includes, for example, boron nitride having the heat resistant characteristic capable of withstanding the energization sintering temperature of the powder material M. The micro discharge to be generated on the contact surface of the powder material M with the forming die is eliminated, or sufficiently reduced to avoid generation of the high temperature region. Formation of a degraded layer with different structure and characteristic from those of the inside the surface layer part of the obtained sintered body can be avoided.

6. 发明专利

JPH09300104A COMPLEX TOOL MATERIAL OF SUPER-HARD ALLOY SYSTEM 失效
公开(公告)号：JPH09300104A
公开(公告)日：1997-11-25
申请号：JP14076896
申请日：1996-05-10
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO
IPC分类号： B23B27/14 , C22C29/08
摘要： PROBLEM TO BE SOLVED: To assure a melt aligning characteristic with steel and increase a connecting force by a method wherein super-hard alloy having a large amount of metal coupling phase is arranged at a part contacting with steel and super- hard alloy having high anti-wearing characteristic is contacted with weldable super-hard alloy directly or through an intermediate layer. SOLUTION: In a complex tool of super-hard alloy system in which a substrate section 2 and a pre-sintered and formed super-hard alloy are connected to each other, super-hard alloy is comprised of an anti-wear layer 1a of 3wt.% or more of metallic coupling phase amount and 20wt.% or less and a weldable layer 1b of 20wt.% or more of metallic coupling phase and 60wt.% or less, wherein the anti-wear layer 1a and the weldable layer 1b are integrally and directly sintered and connected or through the intermediate layer 1c, and further the weldable layer 1b and the substrate section 2 are dispersed and connected to each other, thereby they are forcedly connected to the substrate section 2.

7. 发明专利

JPH09150933A TRANSFER SCREW BLADE 失效
公开(公告)号：JPH09150933A
公开(公告)日：1997-06-10
申请号：JP33808295
申请日：1995-11-30
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO
IPC分类号： B65G33/26 , B04B1/20
摘要： PROBLEM TO BE SOLVED: To increase the strength of adhesion by welding to a blade tip surface by forming a wearing resistant material fixed to the tip part of a transfer screw blade in such a manner that a wear resistant layer having a small metallic coupling phase amount in a cemented carbide laminated in a vertical direction and a weldable layer having a large metallic coupling phase amount are sintered and joined together. SOLUTION: In a transfer screw suitably used for a decanter type centrifugal separator, in a transfer screw blade 3 in which a wear resistant material 7 is fixed to the tip surface 4 of thereof, the wear resistant material 7 is fixed by using a cemented carbide type wear resistant layer 7a having a metallic coupling phase amount of 2 to 105 by weight laminated in a direction vertical to a plate-like bottom surface and a cemented carbide type weldable later 7b having a metallic coupling phase amount of 15 to 40% by weight and joining these two layers by direct sintered joining and/or indirect joining via a middle layer 7c provided between the two layers. In the weldable cemented carbide type weldable layer 7b, the layers are adhered to the tip surface 4 of the transfer screw blade 3 in series by direct welding.

8. 发明专利

JPH1017904A ENERGIZED SINTERING METHOD 失效
公开(公告)号：JPH1017904A
公开(公告)日：1998-01-20
申请号：JP19401496
申请日：1996-07-04
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO , MATSUI SHIGERU
IPC分类号： B22F3/14
摘要： PROBLEM TO BE SOLVED: To provide an energized sintering method, by which the damage to a forming die is prevented and the forming die can be repeatedly be used for long time and the producing cost can be reduced. SOLUTION: This method charges powdery material M into the forming die 1 and compacted with a punch 2 to make a green compact, and the energized sintering is executed by impressing the voltage to the green compact through the punch 2 to obtain the sintered compact. In such a case, a sleeve 3 composed of a carbonaceous material is fitted to at least the surface contacting with the powdery material in the inner surface of the formed die and a plate 4 composed of the carbonaceous material is arranged on the end surface contacting with the powdery material M of the punch 2 to execute the formation of the green compact and the energized sintering of the green compact.

9. 发明专利

JPH09165275A CERAMIC CONJUGATE SINTERED BODY HAVING ULTRA-HARDNESS AND ITS PRODUCTION 失效
公开(公告)号：JPH09165275A
公开(公告)日：1997-06-24
申请号：JP34803495
申请日：1995-12-15
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO
IPC分类号： C04B37/02 , B22F7/06
摘要： PROBLEM TO BE SOLVED: To obtain a ceramic conjugate sintered body useful as an abrasion resistant material excellent in abrasion resistance and corrosion resistance and capable of directly welding to stainless steel or steel by joining a specific abrasion resistant layer and a specific weldable layer under specific conditions. SOLUTION: This conjugate sintered body is obtained by integrally sintering and joining an abrasion resistant layer (1a) of a ceramic sintered body (e.g. an alumina-20% silicon nitride sintered body) consisting of one or more selected from alumina, zirconia, silicon carbide and silicon nitride with a weldable layer (1b) of tungsten carbide-based ultra hard alloy (e.g. tungsten carbide-30% nickel alloy) containing 15-40wt.% of a metallic bonding phase, directly or through an interlayer (1c) consisting of a mixture of the components of these layers (1a), (1b).

10. 发明专利

JPH09150932A SCREW CONVEYOR BLADE 失效
公开(公告)号：JPH09150932A
公开(公告)日：1997-06-10
申请号：JP33808195
申请日：1995-11-30
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO
IPC分类号： B65G33/26 , B04B1/20
摘要： PROBLEM TO BE SOLVED: To increase the strength of adhesion by welding to a blade tip part by providing a wear resistant material fixed to the tip part of a screw conveyor blade as a cemented carbide wear resistant material in which a wear resistant layer having a small metallic coupling phase amount in a sintered hard alloy and a weldable layer having a large metallic coupling phase amount are integrally sintered and joined together. SOLUTION: In screw conveyor suitably used for a decanter type centrifugal separator, in a screw conveyor blade in which a wear resistant material 12 is adhered to its tip part 3, for the wear resistant material 1, a portion of the action surface 5 of an article moving side is made to be a cemented carbide type wear resistant layer 1a having a metallic coupling phase amount of 2 to 10% by weight. A portion of its back side is made to be a cemented carbide type weldable layer 1b having a metallic coupling phase amount of 15 to 40% by weight. These two layers are integrally joined together by direct sintering joining and/or indirect joining via middle layer 1c provided between the two layers and in the cemented carbide type weldable layer 1b, the layers are adhered to the tip part 3 of the screw conveyor blade helically and in series by direct welding.

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