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1. 发明专利

DE3890863T1 未知
公开(公告)号：DE3890863T1
公开(公告)日：1990-02-01
申请号：DE3890863
申请日：1988-10-06
申请人： HITACHI METALS LTD
发明人： NOGAMI SHINGO , YASHIRO TOSHINORI , OKITSU TOSHIO , FURUSHIMA KIYOSHI , KORENAGA ITSUO
IPC分类号： B22D17/20

2. 发明专利

GB2228696A CYLINDER FOR DIE CASTING 未知
公开(公告)号：GB2228696A
公开(公告)日：1990-09-05
申请号：GB8912932
申请日：1988-10-06
申请人： HITACHI METALS LTD
发明人： NAGAMI SHINGO , YASHIRO TOSHINORI , OKITSU TOSHIO , FURUSHIMA KIYOSHI , KORENAGA ITSUO
IPC分类号： B22D17/20
摘要： PCT No. PCT/JP88/01018 Sec. 371 Date Jun. 6, 1989 Sec. 102(e) Date Jun. 6, 1989 PCT Filed Oct. 6, 1988 PCT Pub. No. WO89/03263 PCT Pub. Date Apr. 20, 1989.The die casting cylinder includes an outer cylindrical member made of a metal and a ceramic inner cylindrical member, in a boundary between which a plurality of voids are provided. The voids are preferably grooves provided in an inner surface of the outer cylindrical member of in an outer surface of the inner cylindrical member, with a width "a" and a distance "b" satisfying an a/b ratio of 1:1-6:1.

3. 发明专利

GB2228696B DIE CASTING CYLINDER 未知
公开(公告)号：GB2228696B
公开(公告)日：1991-09-04
申请号：GB8912932
申请日：1988-10-06
申请人： HITACHI METALS LTD
发明人： NAGAMI SHINGO , YASHIRO TOSHINORI , OKITSU TOSHIO , FURUSHIMA KIYOSHI , KORENAGA ITSUO
IPC分类号： B22D17/20
摘要： PCT No. PCT/JP88/01018 Sec. 371 Date Jun. 6, 1989 Sec. 102(e) Date Jun. 6, 1989 PCT Filed Oct. 6, 1988 PCT Pub. No. WO89/03263 PCT Pub. Date Apr. 20, 1989.The die casting cylinder includes an outer cylindrical member made of a metal and a ceramic inner cylindrical member, in a boundary between which a plurality of voids are provided. The voids are preferably grooves provided in an inner surface of the outer cylindrical member of in an outer surface of the inner cylindrical member, with a width "a" and a distance "b" satisfying an a/b ratio of 1:1-6:1.

4. 发明专利

JPH07277847A JOINED BODY AND JOINING METHOD FOR THE SAME 失效
公开(公告)号：JPH07277847A
公开(公告)日：1995-10-24
申请号：JP6616694
申请日：1994-04-04
申请人： HITACHI METALS LTD
发明人： SOFUE MASAHISA , KUMAGAI NORIO , SUWABE HIROHISA , HAMAYOSHI SHIGEYUKI , OKITSU TOSHIO
IPC分类号： B23K20/00 , C04B37/02
摘要： PURPOSE:To obtain a sound joined body in which the generation of crack is prevented even when thermal expansion coefficients are different by arranging a hollow part along the boundary surface of joining to carry out joining by hot isotropic pressure press treatment(HIP). CONSTITUTION:On the boundary part between one member to be joined and the other member to be joined, a hollow part is arranged along the boundary surface of joining. They are joined together by a HIP treatment. The material of the member to be joined may be any of metal, ceramic and cermet, and its type may be either of the shape of a block or powder. The hollow part may be either metal or cermet, but it is required to have airtightness for holding isotropic pressure introduced and given by the HIP treatment and so it must be dense. In the figure showing an example, members to be joined, sialon ceramics 9 and Kovar 10, and a hollow member 2 and a hollow part 11 are provided. In the visual inspection, the Kovar is sintered into a dense body, and the hollow part 11 is not crushed by the HIP treatment, and pores and cracks are not observed all over the section.

5. 发明专利

JPH01317672A STOKE FOR LOW PRESSURE CASTING 失效
公开(公告)号：JPH01317672A
公开(公告)日：1989-12-22
申请号：JP14666088
申请日：1988-06-14
申请人： HITACHI METALS LTD
发明人： NODA AKIRA , OKITSU TOSHIO
IPC分类号： B22D18/04
摘要： PURPOSE:To improve air-tightenness by shaping a nitrade ceramic heat-treated in air at the specific temp. after forming and sintering ceramic material. CONSTITUTION:In low pressure casting method of Al alloy casting, upper part of a holding furnace 1 is closed with a furnace cover and a blowing pipe 5 for compressed air is arranged as inserting into a crucible 2. Successively, a stoke 6 is arranged at the center pat of the furnace cover 4 so as to submerge in the molten Al alloy 3 at the lower end part thereof and also a metallic die 7 is set at upper part of the stoke 7. Then, in the case of supplying the compressed air into the crucible 2 under air-tightening condition from the blowing pipe 5, the molten Al alloy 3 can be pressed into the metallic die 7 through the stoke 6 to complete the casting. In this case, as the stoke 6, the ceramic material is shaped with the nitride ceramic heat-treated in air at 800 - 1300 deg.C after forming and sintering. Therefore, by heat-treatment under the oxidizing atmosphere, as it is acted that the porous inner face is coated with glass phase, exhaust of gas or air in the porocity is prevented. In this resulrt, the air- tightenness is improved and defect of blow hole and the other mixture of gas or air can be prevented.

6. 发明专利

JPH01108016A COMPOSITE CYLINDER 失效
公开(公告)号：JPH01108016A
公开(公告)日：1989-04-25
申请号：JP26595887
申请日：1987-10-21
申请人： HITACHI METALS LTD
发明人： OKITSU TOSHIO , SANO GIICHI
IPC分类号： B29C47/66 , B29C45/62
摘要： PURPOSE:To load a compressive stress on the sintered alloy layer of an inner surface to improve resistances to abrasion and cracking, by a method wherein recesses and projections are formed on jointing boundaries between a cylindrical body and the sintered alloy layer to joint them while the amounts of shrinkage of the cylindrical body and the sintered allow layer from 800 deg.C to a normal temperature are specified. CONSTITUTION:The material of a metallic cylindrical body 1 is selected so as to have a linear expansion coefficient larger than the same of a sintered alloy 2 while recesses and projections 3 are formed on the jointing boundary between both of the cylindrical body and a sintered alloy layer to joint and integrate them, therefore, a compressive stress is applied on the sintered alloy layer. Both ends of the alloy layer 2 are embedded into the cylindrical body 1 in a condition that they are enveloped by the cylindrical body, therefore, the compressive stress of the alloy layer 2 is enhanced. The temperature of the starting point of shrinkage is 800 deg.C. Under a temperature exceeding 800 deg.C, both of the metallic cylindrical body and the sintered alloy layer are soft and cause plastic deformation easily, therefore, remaining stress will never be generated between both of them. The amount of shrinkage of the sintered alloy layer deltaA is made smaller than the amount of shrinkage deltaB of the metallic cylindrical body in order to provide the sintered alloy layer with a compressive stress.

7. 发明专利

JPS61245946A TREATING DEVICE FOR INSIDE SURFACE OF METALLIC MOLD FOR CASTING 失效
公开(公告)号：JPS61245946A
公开(公告)日：1986-11-01
申请号：JP8715985
申请日：1985-04-23
申请人： HITACHI METALS LTD
发明人： YASHIRO TOSHINORI , OKITSU TOSHIO , SAKATA YOSHIHIRO
IPC分类号： B22C23/02
摘要： PURPOSE:To facilitate the cleaning and painting treatment on the inside surface of a metallic mold by mounting a cleaning means and painting means as well as a lifting device for these means to a traveling carriage and providing separately a device for rotating the mold. CONSTITUTION:The carriage 4 is fixed in the position where a rotary brush 13 provided to the top end of the cleaning means is pressed to the inside surface 2' of the metallic mold 2 so as to contact therewith. A supporting bar 10 is lowered from the carriage 4 and the entire inside surface 2' is brushed from the top to bottom end of the metallic mold by the brush 13. The brush 13 is driven by a device 12 attached to the bar 10 and the bar 10 is moved upward and downward by a device 11 provided to the carriage 4. A base 1 is rotated to rotate the mold 2 and the inside surface 2' of the mold is brushed over the entire part thereof. The bar 10 is then raised and the driving device 12 and the brush 13 are housed into the carriage. A supporting bar 9 is then lowered by a vertical driving device 8 and a rotary disk 5 is rotated while a mold coating material is supplied. The painting operation is completed by repeating the movement from the top to bottom end of the metallic mold.

8. 发明专利

JPS60180609A HIGH CHROME CAST-IRON ROLL FOR COLD ROLLING 失效
公开(公告)号：JPS60180609A
公开(公告)日：1985-09-14
申请号：JP3694184
申请日：1984-02-28
申请人： HITACHI METALS LTD
发明人： OKITSU TOSHIO
IPC分类号： B21B27/00 , C22C37/00 , C22C37/08
摘要： PURPOSE:To improve resistances to wear and trouble by combining the composition of components and distribution of hardness of an outer layer with the specific conditions of a core material and joining the outer layer to the core material into a prescribed strength. CONSTITUTION:A high Cr cast iron roll formed by metallurgically joining an outer layer of high Cr cast iron to a core material of cast, forged steel having a >=55kg/mm. strength and a >=1 elongation. Said high Cr cast iron contains in wt%, 2.5-3.5% C, 0.5-1.5% Si, 0.4-1.5% Mn, 0.5-3% Ni, 8-25% Cr, 1-5% Mo, and the balance Fe with inevitable impurities. The molten metal of this high Cr cast iron is poured onto the outer circumference of core material and is metallurgically joined to the core material, to form the outer layer. And the joining strength of a boundary part between the outer layer and the core material is at least >= the lower strength of either of the outer layer or the core material. Further, the outer layer has a >=90 (Shore hardness) surface hardness.

9. 发明专利

JPH0957417A SLEEVE FOR DIE CASTING 失效
公开(公告)号：JPH0957417A
公开(公告)日：1997-03-04
申请号：JP21896795
申请日：1995-08-28
申请人： HITACHI METALS LTD
发明人： SUWABE HIROHISA , SOFUE MASAHISA , FURUSHO KAZUJI , TAKASUGI TSUTOMU , OKITSU TOSHIO
IPC分类号： B22D17/20 , B29C45/62
摘要： PROBLEM TO BE SOLVED: To provide a sleeve for die casting which can secure a long service life of a plunger tip and a sleeve inner cylinder without developing the difference in level between a fixed ring at the tip part and the sleeve inner cylinder even in the case of becoming high temp. during using the sleeve. SOLUTION: The sleeve inner cylinder 2 composed of a ceramic material is shrinkage-fitted into a sleeve outer cylinder 1 composed of a high strength low thermal expansion metallic material and the fixed rings 3a, 4 are arranged at the tip parts of the sleeve outer cylinder 1 to form the sleeve for die casting. Since the fixed ring 3a at the tip part is made of the high strength low thermal expansion metallic material, at the time of becoming a high temp. during using the sleeve, the difference of the coefficient of thermal expansion between the fixed ring at the tip part and the sleeve outer cylinder is small, and the difference of the coefficient of thermal expansion between the fixed ring 3a at the tip part and the sleeve inner cylinder 2 is small as well, and therefore, the difference in level is not caused between the fixed ring 3a at the tip part and the sleeve inner cylinder 2, and it can be prevented that molten metal is stuck to the step difference in level.

10. 发明专利

JP2562445B2 失效
公开(公告)号：JP2562445B2
公开(公告)日：1996-12-11
申请号：JP2845987
申请日：1987-02-10
申请人： HITACHI METALS LTD
发明人： OKITSU TOSHIO
IPC分类号： B21B27/00 , B22F5/12 , C22C1/05 , C22C29/06 , C22C29/08 , C22C29/10 , C22C32/00

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