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1. 发明专利

JPH0441605A MANUFACTURE OF BIMETALLIC CYLINDER 失效
公开(公告)号：JPH0441605A
公开(公告)日：1992-02-12
申请号：JP14876490
申请日：1990-06-08
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMAMOTO AKIO , SUGIYAMA YUTAKA , KATSUNO HARUO , TANAKA KAZUYUKI
IPC分类号： B22F3/14 , B22F3/15 , B22F5/10 , B22F7/04 , C23C22/00 , C23C24/08 , F16J10/04
摘要： PURPOSE:To manufacture a bimetallic cylinder having high accurate inner diameter surface by forming firm oxide film on a core of material having large coefficient of thermal expansion, inserting this core into a hole in cylinder base material and taking out the core after executing hot isostatic pressing treatment and cooling. CONSTITUTION:The core 11 obtd. by joining one pair of a first and second cores 11a, 11b at right and left sides, is inserted into the hole 12a in the cylinder 12, thus space 13 for packing metal powder is formed between the core 11 and the hole 12a. The material of this core 11 has the coefficient of thermal expansion larger than the coefficient of thermal expansion of the material of cylinder 12, and on this surface, chemical treatment of black oxide film treatment, etc., is applied to form the firm oxide film. Into the above space 13 for packing metal powder, e.g. Ni-base corrosion resistant and wear resistant alloy powder is packed and the hot isostatic pressing is applied. By this method, lining layer 14 is formed. In cooling process after that, the core 11 and the lining layer 14 are easily separated with the difference of the coefficient of thermal expansion between the core 11 and the cylinder 12. Successively, the core 11 is taken out from the cylinder by extruding and the high accurate lining layer is fitted and formed in the inner face of cylinder 12.

2. 发明专利

JPH04176629A PARTING-TYPE SCREW FOR EXTRUDER 失效
公开(公告)号：JPH04176629A
公开(公告)日：1992-06-24
申请号：JP30572490
申请日：1990-11-09
申请人： MITSUBISHI HEAVY IND LTD
发明人： KATSUNO HARUO , SAMIZO KUICHI , GOTO YUKIO , KOBAYASHI HIROSHI
IPC分类号： B29C47/60 , C21D9/00
摘要： PURPOSE:To improve wear resistance of each parting-type screw by forming the screw with a highly tough hardened and tempered steel which exhibits a hardness of a specified value or higher by hardening and tempering at a specified tempering temp., hardening partially the surface of a crest of the screw and performing surface hardening treatment of the whole surface of the screw. CONSTITUTION:A parting-type screw 2 is mechanically processed under tempering condition and then, hardened at 1030 deg.C and tempered at 680 deg.C to obtain a hardness of a base material of HRC35-40. Then, a crest region 2d of the screw is hardened 3-5mm from the surface by means of high frequency and then is tempered a-t 450-550 deg.C pref. 530 deg.C to obtain a surface hardness of HRC54 or larger pref. HRC58. Then, gas nitriding treatment is processed at 520 deg.C 70Hr except on a spline groove part. The surface hardness processed by the gas nitriding treatment like this is changed to HV (0,3kg) 1,000 and the depth of the whole hardened layer of about 0.3mm is obtd.

3. 发明专利

JPH0543911A MANUFACTURE OF SCREW FOR SPLIT EXTRUDER AND SPLIT SCREW 失效
公开(公告)号：JPH0543911A
公开(公告)日：1993-02-23
申请号：JP22122591
申请日：1991-08-07
申请人： MITSUBISHI HEAVY IND LTD
发明人： KATSUNO HARUO , GOTO YUKIO
IPC分类号： B22F5/00 , B29C47/60 , B30B11/24
摘要： PURPOSE:To obtain a screw eliminating the machining of a coated layer and having high reliability against breakage by injecting or extruding the kneaded and granulated material of corrosion and wear resistant raw powder and an organic binder between a screw parent material and a metal mold. CONSTITUTION:When manufacturing a split screw constituting a screw for a split extruder, a screw parent material 12a of high toughness is arranged in a metal mold 6 so that a clearance for a coated layer may be left. Into the clearance, a compound for injection molding which corrosion and wear resistant material, such an Ni base self-fluxing alloy powder and an organic binder consisting of acryl base resin, etc., are kneaded and granulated to form is injected. A molding to which the coated layer 12b is stuck to the outer circumference of the screw parent material 12a is obtained. When the molding is subjected to degreasing and sintering, Ni base self-fluxing alloy is diffused and joined to the outer circumference of the screw parent material 12a, permitting a screw 12 excelling in corrosion and wear resistance to be obtained.

4. 发明专利

JPH0425429A SPLIT TYPE SCREW FOR EXTRUDER AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH0425429A
公开(公告)日：1992-01-29
申请号：JP13070090
申请日：1990-05-21
申请人： MITSUBISHI HEAVY IND LTD
发明人： KATSUNO HARUO , SUGIYAMA YUTAKA , TANAKA KAZUYUKI
IPC分类号： B29C47/60
摘要： PURPOSE:To make the screw to high performance by constituting both an external peripheral part having the crest and trough faces of screw and inner circumferential part having a key or a spline groove part of material different in quality and constituting the screw of a double structure. CONSTITUTION:A split type screw 2 is constituted of both an external peripheral part 2a having the crest and trough faces of a screw and an internal circumferential part 2b having a key of a spline groove part. The external peripheral part 2a is formed of high-hardness material to prevent abrasion. Further the inner circumferential part 2b is formed of low-hardness or high-toughness material. The eternal peripheral part 2a and the inner circumferential part 2b are diffused and joined by HIP, etc. Therefore since the low corner of the spline groove wherein high stress is generated at a time for utilization has low hardness and high toughness and becomes low yield point (low elastic limit) in comparison with the parts of crest and trough faces of the screw, the split type screw has the locally easily deformable property. Thereby the groove part is prevented from being broken. On the other hand, since the crest and trough (external periphery) parts of the screw become high hardness high in wear resistance, abrasion of the screw is made little.

5. 发明专利

JPH0418321A LINING SCREW 失效
公开(公告)号：JPH0418321A
公开(公告)日：1992-01-22
申请号：JP12266790
申请日：1990-05-11
申请人： MITSUBISHI HEAVY IND LTD
发明人： SUGIYAMA YUTAKA , KATSUNO HARUO , SUGIURA SHIGEKATSU , TANAKA KAZUYUKI , KOBAYASHI HIROSHI
IPC分类号： B29B7/14 , B29B7/42 , B29C45/60 , B29C47/60
摘要： PURPOSE:To diffusely join a corrosion-resistant abrasion-resistant material completely with the screw body of a base material, and to adapt the material for corrosion- resistant abrasion-resistant application diversified by lining the corrosion-resistant abrasion-resistant material on the outer circumferential surface of a screw through a flame spraying method and executing hot isotropic pressure pressing treatment. CONSTITUTION:Each mixed body of a corrosion-resistant abrasion-resistant alloy having the melting point lower than a screw base material represented by stellite and trivalloy(R), and ceramics and thermet having the high melting point and an alloy thereof and a high melting-point metal such as Mo, W, etc. is flame-sprayed onto a screw 1 or a screw segment 1' machine, thus manufacturing a flame-sprayed lining layer 2. The screw 1 or the screw segment 1' is admitted into a capsule 3 made of steel while using the powder of ceramics, etc. having the high melting point as fillers 4, the inside of the capsule is evacuated after capsule-sealing treatment, hot isotropic pressure pressing treatment (HIP treatment) is executed at the melting temperature or lower of the alloy, an alloy flame-sprayed layer and a mixed-body flame-sprayed layer thereof are diffused-joined between the base material and the flame-sprayed layer, and ceramics as the fillers are removed. Accordingly, the screw in which the flame-sprayed layer is diffused-joined completely can be manufactured.

6. 发明专利

JPH0361306A MANUFACTURE OF BIMETALLIC CYLINDER 失效
公开(公告)号：JPH0361306A
公开(公告)日：1991-03-18
申请号：JP19386789
申请日：1989-07-28
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMAMOTO AKIO , SUGIYAMA YUTAKA , KATSUNO HARUO , TANAKA KAZUYUKI
IPC分类号： F16J10/04 , B22F3/14 , B22F3/15 , B22F5/10 , B22F7/04
摘要： PURPOSE:To facilitate release of lining in inner face of a cylinder and a core and to easily manufacture the bimetallic cylinder by using the core made of material having larger coefficient of heat expansion than that of the cylinder base material at the time of lining the inner face of the cylinder having one or more shafts with corrosion resistant and wear resistant material. CONSTITUTION:At the time of manufacturing the bimetallic cylinder used for injection forming, etc., of plastic product, the core 11 made of the material having large heat expansion ratio is inserted into a hole 12a in the steel-made cylinder 12 to form gap 13 for packing metal powder between the core 11 and the hole 12a of cylinder. Into the gap, the metal powder for forming the corrosion resistant and wear resistant lining is packed and sintered with the hot isostatic pressing apparatus and diffused. Successively, this is cooled to the room temp. and the core and the lining layer 14 are easily separated because of weak joining strength due to stress developed by the difference of heat expansion ratio between the core 11 and the cylinder 12, and the core 11 is pulled out to easily manufacture the cylinder 12 with hole having excellent corrosion resistant and wear resistant lining layer 14 provided.

7. 发明专利

JPH06304992A MANUFACTURE OF SCREW FOR SPLIT TYPE EXTRUDER 失效
公开(公告)号：JPH06304992A
公开(公告)日：1994-11-01
申请号：JP11920193
申请日：1993-04-23
申请人： MITSUBISHI HEAVY IND LTD
发明人： KATSUNO HARUO
IPC分类号： B22F3/20 , B22F5/00 , B22F5/10 , B29C47/60
摘要： PURPOSE:To provide the manufacturing method for a split type screw which can avoid the stress concentration of a connecting section to a screw shaft and improve the strength for the whole of screw. CONSTITUTION:The inner peripheral side of a screw fitted by means of a screw shaft and a key or a spline channel or the like is made of Fe alloy powder of high toughness and the outer peripheral side constituting crest and root sections of the screw is made of Fe alloy powder of high harness and resistance to wear, and both are press densified by the HIP (hot isotropic pressure method), and then hot processing and mechanical processing are carried out, and further hardened and annealed to the given hardness to form the outer peripheral section of the screw into a high hardness and wear-resistant area 12a, while the inner peripheral section is formed into a high toughness area 12b.

8. 发明专利

JPH0679760A CYLINDER FOR PLASTIC MOLDING APPARATUS AND PRODUCTION THEREOF 失效
公开(公告)号：JPH0679760A
公开(公告)日：1994-03-22
申请号：JP23252291
申请日：1991-08-21
申请人： MITSUBISHI HEAVY IND LTD
发明人： TANAKA KAZUYUKI , ONO KENJI , SAMIZO KUICHI , KATSUNO HARUO , KOBAYASHI HIROSHI
IPC分类号： B22D17/20 , B29C45/62 , B29C47/66
摘要： PURPOSE:To enable the production of a long cylinder due to HIP treatment incapable of being produced heretofore. CONSTITUTION:A corrosion and abrasion-resistant material 12 is integrated with a back metal 10 by diffusion bonding to produce a liner 2 and a plurality of the liners 2 are inserted in a steel cylinder main body 1 having a monolithic structure to be integrated with the main body 1 by shrink fitting and the inner periphery of each of the liners 2 is subjected to machining.

9. 发明专利

JPH0515939A METHOD FOR MOLDING ANNULAR MEMBER 失效
公开(公告)号：JPH0515939A
公开(公告)日：1993-01-26
申请号：JP19609291
申请日：1991-07-11
申请人： MITSUBISHI HEAVY IND LTD
发明人： OTA TAKAHIRO , KATSUNO HARUO , YAMAMOTO MASAKAZU
IPC分类号： B21J5/08 , B21K21/02 , B21K21/06
摘要： PURPOSE:To improve the fatigue strength of a product to which repetitive stresses are applied as to the forging method for molding annular members, such as elastic rings of reduction gears. CONSTITUTION:After a circular conical recessed part 10 is provided near the central part on both upper and lower surfaces of a circular cylindrical blank material, this blank material 1 is upset by upsetting tools 2a, 2b from above and below until the prescribed diameter is attained. Consequently, the angle of inclination of the fiber flow and axis near the central part of the blank material decreases and the fatigue strength of the product in this part where the repetitive stresses are applied is improved.

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