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1. 发明专利

JPH09104057A EXTRUDER 失效
公开(公告)号：JPH09104057A
公开(公告)日：1997-04-22
申请号：JP26154495
申请日：1995-10-09
申请人： FUJIKURA LTD
发明人： WATABE TOSHIHITO , TANAKA INAHO , MIYATA HIROYUKI
IPC分类号： B29C47/68
摘要： PROBLEM TO BE SOLVED: To provide an extruder capable of catching foreign matter present in parallel to the flow direction of a resin and made simple in the constitution of a screen mesh and improved in workability. SOLUTION: In an extruder receiving industrial plastic LDPE(low density polyethylene) to remove foreign matter to supply clean plastic, a breaker plate 33 equipped with a screen mesh 31 on the leading end side of a rotatable screw 21 is provided so as to be rotatable in the direction same to or reverse to the rotary direction of the screw. A plurality of the breaker plates 33 equipped with the screen meshes 31 are provided in series so as to be respectively independently rotatable and the respective breaker plates are alternately rotated in directions same and reverse to the rotary direction of the screw 21.

2. 发明专利

JPH08271576A DIELECTRIC BREAKDOWN VOLTAGE MEASURING APPARATUS 失效
公开(公告)号：JPH08271576A
公开(公告)日：1996-10-18
申请号：JP7211795
申请日：1995-03-29
申请人： FUJIKURA LTD
发明人： WATABE TOSHIHITO , MIYATA HIROYUKI
IPC分类号： G01R31/12 , G01R31/16
摘要： PURPOSE: To measure the dielectric breakdown strength corresponding to respective conditions through a constitution comprising a syringe arranged to surround two membrane electrodes on a planar body and a piston to be inserted into the syringe and varying the thickness of insulating liquid film and the pressure being applied to the insulating liquid. CONSTITUTION: A syringe 6 is stood on a planar body 4 while surrounding membrane electrodes 1, 2. The syringe 6 contains another test material, i.e., insulating liquid 8. A piston 7 is inserted into the syringe 6 from above in order to pressurize the insulating liquid 8 contained therein. Fixing metals 10 fix the syringe 6 hermetically to the planar body 4 made of a solid dielectric. The insulating liquid 8 is sealed hermetically by means of the planar body 4, the syringe 6 and the piston 7 before dielectric breakdown strength is measured. With such structure, the insulating liquid 8 does not flow out even if it is pressurized and the dielectric breakdown strength can be measured at the interface of the insulating liquid 8 and planar body 4.

3. 发明专利

JPH08235948A MANUFACTURE OF ENAMEL WIRE 失效
公开(公告)号：JPH08235948A
公开(公告)日：1996-09-13
申请号：JP3741395
申请日：1995-02-24
申请人： FUJIKURA LTD
发明人： ONO AKINOBU , AMANO SHIGERU , WATABE TOSHIHITO , SAWAMOTO TAKEHITO , OKA HIDEAKI , SUGIYAMA SHUICHI
IPC分类号： B05D3/10 , H01B13/16
摘要： PURPOSE: To easily manufacture an enamel wire of superior quality at high speed by using liquid having less vaporization heat than liquid coolant as a cleaning agent and has a reducing property. CONSTITUTION: A hard drawn copper wire 12 which is drawn from a delivery bobbin 11 is made into a high temperature annealed copper wire 15, passed through a cooling tank 16 filled with industrial water, and made into the cooled annealed copper wire 17. Secondarily, the wire 17 is passed through a cleaning tank 18 filled with alcohol and after its surface is cleaned, it is naturally dried and at the same time dried by a heating fan completely for the time till it reaches an enamel paint tank 20. The wire 17 is introduced to the enamel paint tank 20 via a guide roller 25 so as to be coated with the enamel paint, after that it is passed through a metal die 21 so as to remove excess enamel, and then passed through a high-temperature baking furnace 22 so that the enamel paint on the wire 17 is baked. Liquid which has less vaporization heat than liquid coolant is used for cleaning agent so that baking speed of the enamel can be greatly heightened.

4. 发明专利

JPH10191543A CONNECTION PORTION FOR POWER CABLE 失效
公开(公告)号：JPH10191543A
公开(公告)日：1998-07-21
申请号：JP34541196
申请日：1996-12-25
申请人： FUJIKURA LTD
发明人： WATABE TOSHIHITO , MIYATA HIROYUKI
IPC分类号： H02G1/14 , H02G15/08
摘要： PROBLEM TO BE SOLVED: To provide a power cable connecting portion in which the electrical performance does not change at the interface between a crosslinked polyethylene insulation layer and a rubber stress cone even after the use of the connecting portion for a long period of time. SOLUTION: In a connection box for connecting together power cables 1, 1 having crosslinked polyethylene insulating bodies 4 and 4, stress cones 5, 5 comprising polyethylene propylene rubber are contacted to XLPE insulating bodies 4, 4 in a state where a pressure is applied by a compressors 9l, 9r. And the ethylene propylene rubber of this stress cone 5, 5 is vulcanized and molded by increasing a vulcanize auxiliary by 1 part to 5 parts compared to the ordinary amount used so that the electrical performance will not be degraded even after the use for a longer period of time.

5. 发明专利

JPH09140024A CASTING DIE FOR EPOXY UNIT 失效
公开(公告)号：JPH09140024A
公开(公告)日：1997-05-27
申请号：JP29288495
申请日：1995-11-10
申请人： FUJIKURA LTD
发明人： WATABE TOSHIHITO , MIYATA HIROYUKI
IPC分类号： H02G1/14
摘要： PROBLEM TO BE SOLVED: To shorten the preheating time and obtain a high dimensional accuuracy by forming a casting die for epoxy unit used for molding an epoxy cured material for electricity and power, from aluminum nitride. SOLUTION: Aluminum nitride is used for the material of a cating die for molding an epoxy resin insulator 5 which is an epoxy unit which constitutes a prefab joint. Using the casting die made of aluminum nitride, the epoxy resin insulator 5 is molded. Since this die has a high coefficient of thermal conductivity, it requires shorter preheating. And, a high dimensional accuracy can be obtained since a coefficient of expansion of the die is low. Furthermore, the die has a large strength and an excellent anti-corrosion property and is light- weight and is nonpoisonous. It also has an electric insulation and is tribomaterial. Because of these characteristics, the die has a good mold-release property.

6. 发明专利

JPH099447A CONNECTION METHOD OF CROSSLINKED POLYETHYLANE INSULATION POWER CABLE AND CONNECTING METALLIC MOLD DEVICE 失效
公开(公告)号：JPH099447A
公开(公告)日：1997-01-10
申请号：JP15463495
申请日：1995-06-21
申请人： FUJIKURA LTD
发明人： MABUCHI TOSHIAKI , TAKAHASHI KATSUHIKO , GOTO KAZUHIKO , WATABE TOSHIHITO
IPC分类号： B29C39/26 , B29C39/22 , B29K23/00 , B29K105/24 , B29L31/34 , H01R4/20 , H01R43/00 , H02G1/14 , H05B3/00
摘要： PURPOSE: To prevent the generation of distortions in a cable insulator in the case of pressure, heating and crosslinking by using a metallic mold having a plurality of partition wall rooms on the central part of a crosslinking zone of a reinforcing insulator in connection with both sides, and reducing pressure and temperature toward the ends of the metallic mold to pressure, heat and crosslink. CONSTITUTION: A reinforcing insulator 4 is stored in a crosslinking metallic mold 10. In that case, a sealing tube 5 is coated across the reinforcing insulator 4 and cable insulators 1a and 1b. The metallic mold 10 is bisymmetrical up and down two-split structure with a joint section as the center, partition wall rooms 10b, 10c and 10d are formed in a crosslinking zone 10a of the reinforcing insulator 4 and the cable insulators 1a and 1b on both sides thereof. The reinforcing insulator 4 and cable insulators 1a and 1b are connected in a crosslinking molding state through nitrogen gas 6 as pressure and heating media in the metallic mold 10. In that case, setting pressure and temperatures of the partition wall rooms 10b, 10c and 10d are reduced successively toward the outside.

7. 发明专利

JPH08227616A INSULATED WIRE 失效
公开(公告)号：JPH08227616A
公开(公告)日：1996-09-03
申请号：JP3271995
申请日：1995-02-21
申请人： FUJIKURA LTD
发明人： ONO AKINOBU , AMANO SHIGERU , HATADA MICHIAKI , WATABE TOSHIHITO , SUGIYAMA SHUICHI
IPC分类号： H01B3/48 , H01B7/02 , H01B7/29 , H01B7/34
摘要： PURPOSE: To provide an insulated wire, which has the excellent flexibility and which does not hurt a hand of a worker during the manufacturing work, by winding an aramid fiber bundle around a conductor, and dipping this conductor in Si varnish, and hardening it so as to form an insulated body at a predetermined thickness. CONSTITUTION: A conductor 1 is made of a straight angle wire having a rectangular cross section, and an insulating body 2 is provided thereon. The insulating body 2 is formed by dipping an aramid fiber bundle in the silicone varnish, and hardening it, and thickness thereof is formed at 50-100μm, desirably, at 60-80μm. A yarn or a roving made of aramid fiber strand, which is formed by bundling several ten several hundred mono-filaments of aramid fiber, is wound around the conductor 1. Width of this fiber bundle at 0.2-0.5mm and thickness thereof at 0.01-0.05mm are desirable. Sizing is eliminated at the time of processing this fiber bundle, and washing is performed. A usual tape winding machine can be utilized so as to wind the fiber bundle around the conductor 1. Dip of the silicone varnish is performed by passing the conductor 1 wound with the fiber bundle into a coating dies filled with the varnish.

8. 发明专利

JPH09274940A PREFABRICATED CONNECTION PART OF CROSS LINKED POLYETHYLENE INSULATED POWER CABLE AND ITS MANUFACTURE 失效
公开(公告)号：JPH09274940A
公开(公告)日：1997-10-21
申请号：JP8555496
申请日：1996-04-08
申请人： FUJIKURA LTD
发明人： WATABE TOSHIHITO , MIYATA HIROYUKI
IPC分类号： H01R4/70 , H01R4/18
摘要： PROBLEM TO BE SOLVED: To make easy assembly in a short time at the connecting position of cable with excellent electrical insulation. SOLUTION: In prefabricated connection 20 for cross linked polyethylene insulated power cable, an intermediate rubber layer 8 made of rubber is provided between a stress cone 4 of rubber and an epoxy mold unit 5 of epoxy resin. Then at the phase boundary of the stress cone 4 and the intermediate layer 8, and boundary of the epoxy mold unit 5 and the intermediate rubber layer 8, an insulating oil film is provided.

9. 发明专利

JPH0919022A CONNECTION OF CROSSLINKED-POLYETHYLENE POWER CABLE 失效
公开(公告)号：JPH0919022A
公开(公告)日：1997-01-17
申请号：JP16184495
申请日：1995-06-28
申请人： FUJIKURA LTD
发明人： WATABE TOSHIHITO
IPC分类号： H01R43/00 , H02G1/14
摘要： PURPOSE: To obtain a high insulation property at a connection by a method wherein when crosslinked-polyethylene power cables are connected with a conductor and then a connected section is coated with a reinforcing insulator and is pressurized and heated, tension is applied to cable insulators in the longitudinal direction. CONSTITUTION: Insulators 1a, 1b at the ends of CV cables to be connected are peeled off and conductors 2 are exposed and then insulating layers at the ends of the cables are cut tapered and the conductors 2 are pressure-welded by means of a copper-made sleeve 3. A conductor connecting section is stored in a die and the die is filled with resin to form a reinforcing insulator 10. After that, a sealing tube is applied over the reinforcing insulator 10 and the cable insulators 1a, 1b and that part is stored in a crosslinking die 20. Nextly, the reinforcing insulator 10 and the cable insulators 1a, 1b are heated to connect them with crosslinked-mold. At that time, a slide shaft 22 and a compression coil spring 23 are installed between a cable fixture metal fitting 21 and the crosslinking die 20 to apply tension in the longitudinal direction to the cable insulators 1a, 1b. By this method, the insulation property of the connecting section can be increased.

10. 发明专利

JPH08285800A PLASTIC INSULATED CABLE AND METHOD FOR MEASURING RESIDUAL STRAIN AT JOINT THEREOF 失效
公开(公告)号：JPH08285800A
公开(公告)日：1996-11-01
申请号：JP8849095
申请日：1995-04-13
申请人： FUJIKURA LTD
发明人： WATABE TOSHIHITO , MIYATA HIROYUKI
IPC分类号： G01N25/16 , H01B13/00 , H02G15/08
摘要： PURPOSE: To measure the residual strain conveniently and accurately by splitting the insulation layer in a plastic insulated cable or at the joint thereof into a small rectangular piece of specified dimensions and measuring the dimensional variation of the small piece due to heating. CONSTITUTION: An insulation layer of crosslinked polyethylene, for example, is cut into a piece of 1-5mm thick, preferably 1-3mm thick, to obtain a test piece. The test piece has ordinary size of 40-80mm (height) × 10-500mm (width). The test piece is then split into two or more thus obtaining split pieces 10 of insulator 20 having inner and outer semiinsulating layers 22, 21. One side of the dimension measuring surface of the piece 10 is set at 5-15mm. After determining the dimension measuring surface and a dimension measuring point, the dimensions are measured at room temperature using vernier calipers, micrometer, etc. Subsequently, the piece 10 is heated in a heating furnace at 110-150 deg.C for 1-3 hours while being mounted on a support, e.g. a glass plate 30. It is then cooled gradually and the dimensions of the piece 10 are measured again at same point. Residual strain and distribution thereof are determined based on the dimensional variation due to heating.

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