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31. 发明专利

JP2000246466A FRICTION AGITATION WELDING OF GRAPHITE CAST IRON 失效
公开(公告)号：JP2000246466A
公开(公告)日：2000-09-12
申请号：JP4375999
申请日：1999-02-22
申请人： KURIMOTO LTD , HORIE AKIRA
发明人： KITAGAWA MASAYOSHI , MICHIURA YOSHISADA , MAEKAWA KEIICHI , HORIE AKIRA , KO BUNSHIYOKU
IPC分类号： B23K20/12 , B23K103/06 , B23K103/18
摘要： PROBLEM TO BE SOLVED: To provide a friction agitation welding method to strongly join in no defect even for a graphite cast iron having a solid round bar shape. SOLUTION: A cross sectional face of a joining face 11 of at least either one of joining materials 1, which is formed to a recessed groove 13 with taking a rotation axis as an apex, is butted on the joining face 12 of the other joining material through a gap void 10, one of the materials to be joined is fixed, the other is coaxially rotated, a graphite deformed layer produced due to mutual friction force is discharged to the outside of the joining face, the materials are subjected to upset joining. In an actual state, in a fracture test, as being contrary to a conventional technology, there is no case of the fracture at a boundary, all are fractured at a base material or a heat affected zone, the tensile strength is extremely high, sound joining of no defect made of the matrix toughened higher than the base material is obtained.

32. 发明专利

JPH10264301A METHOD FOR CORROSION-PROOF COATING OF STEEL PIPE, AND STEEL PIPE PROVIDED WITH CORROSION-PROOF COATING 失效
公开(公告)号：JPH10264301A
公开(公告)日：1998-10-06
申请号：JP7351697
申请日：1997-03-26
申请人： KURIMOTO LTD
发明人： KITAGAWA MASAYOSHI , MICHIURA YOSHISADA , SUGIMURA SEIJI
IPC分类号： B05D1/36 , B05D7/14 , B05D7/24 , B32B15/08 , C09D5/08 , C09D133/06 , C09D163/00 , C09D167/00 , C09D175/04 , C23C4/08
摘要： PROBLEM TO BE SOLVED: To make pitting corrosion be hardly brought about, by providing a Zn-Al pseudo-alloy layer of which the Al content is a specified value, a water-based coating film layer of which the water absorption is a specified value and further a solvent coating film on a steel pipe. SOLUTION: By this method for corrosion-proof coating of a steel pipe, a Zn-Al pseudo-alloy layer which is provided as a primer layer showing an effect of cathodic protection and of which the Al content is 15-50 wt.%, then a water-based coating film layer which is provided for improving the effect of the cathodic protection of the primer layer and of which the water absorption is 5-50% and lastly a solvent coating film which is provided for intercepting water in the water-based coating film layer from the water in an environment, lessening the lowering of the effect of the cathodic protection due to the provision of the water-based coating film and also protecting the steel pipe from an impact or the like from outside, are provided on the steel pipe. When the Al content is in the range of 15-50 wt.%, the effect of the cathodic protection being more excellent than that of a Zn layer is shown. In the case when the water absorption of the water-based coating film layer is less than 5%, the effect of the cathodic protection is not seen nearly at all, and when it exceeds 50%, the coating film has a bloating tendency, which is undesirable for durability, though the effect of the cathodic protection is shown.

33. 发明专利

JPH1095928A POWDER COATING FOR CAST IRON PIPE 失效
公开(公告)号：JPH1095928A
公开(公告)日：1998-04-14
申请号：JP25143096
申请日：1996-09-24
申请人： DAINIPPON INK & CHEMICALS , KURIMOTO LTD
发明人： KOIDE HIDEO , MIYAZAWA MASASHI , ONODERA KAZUYUKI , KITAGAWA MASAYOSHI , MICHIURA YOSHISADA , DEGUCHI TAKAAKI , HANANO KAZUHITO , SAITO MASAHIKO
IPC分类号： C08G59/14 , C08G59/40 , C09D5/03 , C09D163/00
摘要： PROBLEM TO BE SOLVED: To obtain the subject coating material remarkably excellent in curability, capable of being thereby cured at low temperatures and good in storage stability and the physical properties of coating films by using a specific bisphenol type epoxy resin as an epoxy resin. SOLUTION: This powder coating material contains (A) a solid bisphenol type epoxy resin (preferably a bisphenol A type epoxy resin) having an α-glycol content of 0.03-0.07meq/g and a hydrolyzable chlorine content of

34. 发明专利

JPH08176739A AUSTENITIC STAINLESS STEEL-MADE HEXAGONAL HEAD BOLT AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH08176739A
公开(公告)日：1996-07-09
申请号：JP33622394
申请日：1994-12-22
申请人： KURIMOTO LTD
发明人： KITAGAWA MASAYOSHI , MICHIURA YOSHISADA
IPC分类号： F16B35/00 , B21K1/44 , C22C38/00 , C22C38/42 , C22C38/58
摘要： PURPOSE: To obtain a hexagonal head bolt made of an austenitic stainless steel shoring corrosion resistance and durability. CONSTITUTION: The austenitic stainless steel blank composed of-0.06% C,

35. 发明专利

JPH07332583A CORROSION RESISTANT STRUCTURE OF BRANCHING HOLED PART IN METALLIC PIPE 失效
公开(公告)号：JPH07332583A
公开(公告)日：1995-12-22
申请号：JP15274994
申请日：1994-06-10
申请人： KURIMOTO LTD
发明人： KITAGAWA MASAYOSHI , NAKANO RYOICHI , TOYOSHIMA HIROYOSHI , SHIOMI ICHIRO
IPC分类号： F16L41/06 , F16L58/18
摘要： PURPOSE:To eliminate an influential element causing rust formation at a branching holed part by keeping a space between the outer peripheral surface of the upper flange of a corrosion resistant sleeve and the shaft hole of a snap tap, and fitting a water expandable O-ring into a kerf recessed in the upper flange. CONSTITUTION:In a corrosion resistant sleeve 2-1 fitted into a circular hole 11 bored for the branching of a cast iron pipe 1, an upper flange 21-1 is locked to the outer edge of the circular hole 11 so as to form the covering face 22-1 for covering the inner peripheral surface of the circular hole 11, and the lower end is bent to form a lower flange 23-1 and pressure- welded to the cement lining 14 or the like on the inner peripheral surface of the cast iron pipe 1. A rubber packing 41 is interposed among a snap tap 3 integrally screw-fitted onto the outer peripheral surface 12 of the cast iron pipe 1, the bottom face of a snap tap saddle 4. and the outer peripheral surface 12 of the cast iron pipe 1 so as to attain water sealing action. An O-ring 25 made of water expandable rubber material fitted into a cut groove 24 recessed in the optional position of the upper flange 21-1 is swollen reactinon with water, passing through a space S formed between the shaft hole 31 of the snap tap 3 and the upper flange 21-1, so as to close the space S and thereby to prevent water from reaching a clearance C.

36. 发明专利

JPH07208675A STRUCTURE OF PERFORATED PART FOR CAST IRON PIPE BRANCHING 失效
公开(公告)号：JPH07208675A
公开(公告)日：1995-08-11
申请号：JP2326794
申请日：1994-01-24
申请人： KURIMOTO LTD
发明人： KITAGAWA MASAYOSHI , NAKANO RYOICHI , TOYOSHIMA HIROYOSHI , SHIOMI ICHIRO
IPC分类号： F16L41/06
摘要： PURPOSE:To eliminate an influential element for forming rust by fitting spacers which are in contact with the outer circumferential surface of the upper flange of an anticorrosive sleeve into the lower end inner circumferential surface of the axis hole of a snap tap. CONSTITUTION:Upper flanges 21 of an anticorrosive sleeve are locked in circular holes 13 perforated to a cast iron pipe 1, and lower flanges 23 are sticked on the cement linings of the inner surface of the cast iron pipe 1 or anticorrosive layers 14 coated with epoxy resin powder, etc. Spacers 31 wherein an inner circumferential surface which is in contact with the outer circumferential surface of the upper flange 21 are fitted into the lower end inner circumferential surface 33 of the axis hole 32 of a snap tap 3. Hereby, any trouble which occurrs in the vicinity of a water line piping end, such as mixture of chips of a drill during a perforating period, induction of oxidation action following after the mixture and occurrence of red water following after the oxidation action is previously prevented.

37. 发明专利

JPH0567839B2 失效
公开(公告)号：JPH0567839B2
公开(公告)日：1993-09-27
申请号：JP26088888
申请日：1988-10-17
申请人： KURIMOTO LTD , DAINIPPON INK & CHEMICALS
发明人： KITAGAWA MASAYOSHI , MATSUNAGA JUNJI , TAMURA JUJI , TSUNEKAWA YASUJI
IPC分类号： F16L9/04 , F16L9/02

38. 发明专利

JPH0568918A METHOD AND DEVICE FOR LINING INNER SURFACE OF PIPE 失效
公开(公告)号：JPH0568918A
公开(公告)日：1993-03-23
申请号：JP26103691
申请日：1991-09-11
申请人： KURIMOTO LTD
发明人： KITAGAWA MASAYOSHI , MATSUNAGA JUNJI , TAKADA NOBUHIDE , AOKI NOBUO
IPC分类号： B05B13/06 , B05C7/02 , B05D7/22 , B05D7/24 , B28B21/58 , B28B21/94
摘要： PURPOSE:To apply a firm and dense lining to the inner surface of a pipe using aggregate and a curable resin. CONSTITUTION:The aggregate 3 quantitatively carried by a screw conveyor 4 is vertically supplied to the inner surface of a pipe 1 moved under rotation and, simultaneously the liquid curable resin carried by pipes 61,62,63 is injected to the falling position where the aggregate reaches the bottom point of the pipe l to coat the surfaces of the particles of the aggregate with the thin film of the curable resin. These particles are strongly pressed to the inner surface of the pipe by centrifugal force after falling to be rapidly cured. By this procedure, lining is applied to the inner surface of the pipe. This method can be also adapted to a small caliber pipe. The thickness of a lining layer becomes uniform as compared with a conventional one. The device adapted to this method is also simple.

39. 发明专利

JPH04370494A CONNECTION METHOD FOR POLYETHYLENE PIPE FOR SUPPLY WATER 失效
公开(公告)号：JPH04370494A
公开(公告)日：1992-12-22
申请号：JP17170691
申请日：1991-06-17
申请人： KURIMOTO LTD
发明人： KITAGAWA MASAYOSHI , SHIOMI ICHIRO , MICHIURA YOSHISADA
IPC分类号： B29C65/36 , B29C65/00 , B29C65/34 , B29K23/00 , B29K105/16 , B29K105/22 , B29L31/24 , F16L47/02
摘要： PURPOSE:To perfectly weld a polyethylene pipe, especially suitable for a pipeline for supply water to a polyethylene pipe coupling without fail. CONSTITUTION:A low density polyethylene pipe 2 for supply water is inserted in the inner surface of a high density polyethylene pipe coupling 1 for supply water. Further, a core tool 3 adhered on the inner surface of a pipe is engaged throughout the length of a weld part. Through energization of a heating wire 4 embedded in the weld surface of the pipe coupling, slight surplus welding is effected. Thermal expansion generated by heating is constrained between a high strength of the outer surface side and the core tool on the inner surface side and converted into reaction which strongly presses a contact surface. Thus, a dense and complete weld part is provided. Fine management of a work is eliminated. A piping work at a site is carried out without an individual difference and failure.

40. 发明专利

JPH04370493A POLYETHYLENE PIPE COUPLING FOR SUPPLY WATER 失效
公开(公告)号：JPH04370493A
公开(公告)日：1992-12-22
申请号：JP17170491
申请日：1991-06-17
申请人： KURIMOTO LTD
发明人： KITAGAWA MASAYOSHI , SHIOMI ICHIRO , MICHIURA YOSHISADA
IPC分类号： B29C65/36 , B29C65/34 , B29K23/00 , B29K105/16 , B29L31/24 , F16L47/02
摘要： PURPOSE:To provide a pipe coupling made of polyethylene which especially has an aptitude as a line for supply water. CONSTITUTION:Carbon black is mixed in a polyethylene material having density higher than that of a low density polyethylene pipe 2 for water supply, a pipe coupling 1 around an inner peripheral surface 11 of which a heating wire 14 is wound is formed. This constitution causes a pipeline to be durable to a concentrated stress even when an external force is exerted on the pipeline since it is of high density and high strength. Since carbon black is mixed, weather resistance is high. Since density is high inspite of being a mixture, chlorine water resistance is not lowered. When the surface contacts with a pipe is heated, a face pressure is kept to form a tight weld part.

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