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1. 发明专利

JP2003211474A MOLD FOR THERMALLY MOLDING FRICTION MATERIAL AND METHOD FOR MANUFACTURING FRICTION MATERIAL USING MOLD 审中-公开
公开(公告)号：JP2003211474A
公开(公告)日：2003-07-29
申请号：JP2002014245
申请日：2002-01-23
申请人： AKEBONO BRAKE IND , AKEBONO RES & DEV CENTRE
发明人： ARAI KATSUO , SASAKI YOSUKE , KURIHARA SEI , MIYAGI KOICHI , GOTO TAKASHI , SUNAGA ISAO
IPC分类号： B29C43/36 , B29C43/18 , B29C43/20 , B29K103/00 , B29L31/16
摘要： PROBLEM TO BE SOLVED: To provide a mold for thermally molding a friction material with a capability of reducing the incidence of defects such as cracks and blisters due to the insufficient discharge of a generated gas, by rapidly discharging the gas to the outside from a molded product, and a method for manufacturing a friction material using the mold. SOLUTION: The mold for thermal molding comprises a top force, an intermediate force and a bottom force in order to form the friction material by thermally pressurizing a preform as a raw friction material and a pressure plate. In this mold, the intermediate mold coming into contact with the preform is constituted of an upper intermediate part and a lower intermediate part and an insert plate A with a cavity matching the outer shape of a friction material product and a gas bleeder hole and at least one piece of an insert plate B with a larger cavity than the outer shape of the product, a gas bleeder hole and a gas bleeder groove communicating between the cavity and the gas bleeder hole, mutually laminated and connected to each other, between the upper intermediate part and the lower intermediate part. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2003145568A DEGASSING METHOD IN PROCESS FOR THERMOFORMING FRICTION MATERIAL 审中-公开
公开(公告)号：JP2003145568A
公开(公告)日：2003-05-20
申请号：JP2001344466
申请日：2001-11-09
申请人： AKEBONO BRAKE IND , AKEBONO RES & DEV CENTRE
发明人： SASAKI YOSUKE , ARAI KATSUO , KUSAKA SATOSHI , KURIHARA SEI , MIYAGI KOICHI
IPC分类号： F16D69/00 , B29C43/02 , B29C43/36 , B29C43/52 , B29L31/16
摘要： PROBLEM TO BE SOLVED: To provide a degassing method for preventing the occurrence of defective molding such as cracks and blisters and a method for thermoforming a friction material which can obtain the friction material excellent in quality at a high temperature in a short time. SOLUTION: In a method for producing the friction material in which the preliminary molding of the friction material is thermoformed by using a mold for thermoforming the friction material comprising a press mold, a middle mold, and a pressurization mold, in a degassing method in a process for thermoforming the friction material, the middle parts of the press mold and the middle mold are manufactured from a material having heat conductivity higher than that of the other parts. During the thermoforming, the preliminary molding is heated so that a part to be finally cured is concentrated to the side contacting the middle mold, and gas generated from the preliminary molding by the thermoforming is discharged outside the mold from a position contacting the final curing part of the preliminary molding through a degassing passage opened to the inner surface of the middle mold.

3. 发明专利

JP2003232392A THERMOFORMING MOLD AND MOLDING METHOD FOR FRICTION MATERIAL 审中-公开
公开(公告)号：JP2003232392A
公开(公告)日：2003-08-22
申请号：JP2002031185
申请日：2002-02-07
申请人： AKEBONO RES & DEV CENTRE
发明人： ARAI KATSUO , KURIHARA SEI
IPC分类号： F16D69/04 , B29C43/18 , B29C43/36 , B29K101/00 , B29L31/16
摘要： PROBLEM TO BE SOLVED: To provide a thermoforming mold and a molding method to prevent the occurrence of defective molding, such as cracking and blister, and produce a friction material excellent in quality. SOLUTION: In a thermoforming mold having an upper mold and a bottom mold and molding a friction material by heating and pressurizing a friction material raw material and a pressure plate for integral fixing, the thermoforming mold for the friction material is featured such that a mold on the side making contact with the pressure plate is formed of a material having thermal conductivity being higher than that of a material for other mold. A molding method for a friction material is featured that by using the thermoforming mold for the friction material formed that a mold on the side making contact with the pressure plate is formed of a material having thermal conductivity being higher than that of a material for the other mold, the pressure plate and a friction material raw material are heated and pressurized for integral fixing. COPYRIGHT: (C)2003,JPO

4. 发明专利

JP2003145565A METHOD FOR PRODUCING FRICTION MATERIAL 审中-公开
公开(公告)号：JP2003145565A
公开(公告)日：2003-05-20
申请号：JP2001344465
申请日：2001-11-09
申请人： AKEBONO RES & DEV CENTRE
发明人： KUSAKA SATOSHI , KURIHARA SEI , SASAKI YOSUKE
IPC分类号： F16D69/00 , B29C43/14 , B29L31/16
摘要： PROBLEM TO BE SOLVED: To provide a thermoforming method for a friction material which can prevent the occurrence of defective molding such as cracks and blisters, obtain a friction material excellent in quality, and improve the productivity of the friction material by curtailing the length of time for a thermoforming process. SOLUTION: A method for producing the friction material includes the thermoforming process in which the preliminary molding of the friction material is thermoformed at a prescribed temperature under a prescribed pressure in a thermoforming mold, pressurization and pressure reduction are repeated alternately prescribed times, and gas generated from the preliminary molding is subjected to degassing treatment. The degassing treatment process includes the first pressure reduction period in which the pressure is reduced from a molding pressure to the vapor pressure of the gas generated from the preliminary molding within 1.5 s and the second pressure reduction period in which the pressure is reduced to the atmospheric pressure during a time at least twice as long as the first pressure reduction period.

5. 发明专利

JP2003127161A MOLD FOR THERMOFORMING OF FRICTION MATERIAL AND METHOD FOR MOLDING FRICTION MATERIAL 审中-公开
公开(公告)号：JP2003127161A
公开(公告)日：2003-05-08
申请号：JP2001326415
申请日：2001-10-24
申请人： AKEBONO RES & DEV CENTRE
发明人： ARAI KATSUO , SASAKI YOSUKE , KURIHARA SEI
IPC分类号： B29C43/18 , B29C43/36 , B29C43/52 , B29K101/10 , B29K105/08 , B29K105/16 , B29L31/16
摘要： PROBLEM TO BE SOLVED: To provide a mold for thermoforming in which percentage of rejects such as cracks and blisters caused by shortage of vent of gas can be decreased, by rapidly vent the gas generated outside from a molded article in a thermoforming process of a friction material, and to provide a method for thermoforming. SOLUTION: In the mold for thermoforming with a force and a pressure mold for molding the friction material by heating and pressing a perform of a raw material of the friction material and a pressure plate and integrally fixing them to mold the friction material, the mold for thermoforming of the friction material and the method for thermoforming using it is constituted in such a way that a part of the mold corresponding to the central part of the molded article is made to be a split mold, a heater for locally heating the central part of the molded article is built in the split mold, and temperature of the split mold during molding of the friction material is made higher than the temperature of the mold main body.

6. 发明专利

JP2002047481A MEASURING METHOD FOR AMMONIA GAS GENERATED DURING THERMAL FORMING OF FRICTION MATERIAL 失效
公开(公告)号：JP2002047481A
公开(公告)日：2002-02-12
申请号：JP2000231641
申请日：2000-07-31
申请人： AKEBONO RES & DEV CENTRE
发明人： KURIHARA SEI , ARAI KATSUO
IPC分类号： G01N31/00 , B29C43/02 , B29C43/18 , B29C43/58 , C09K3/14 , G01N21/35 , G01N21/3504 , G01N33/00
摘要： PROBLEM TO BE SOLVED: To measure stably on real time the amount of a reaction gas generated during a thermal forming process of a friction material containing a thermosetting resin to thereby quickly and correctly recognize the state of curing reaction and provide a friction material excellent in quality. SOLUTION: In a metal mold for thermally forming a preform of a friction material containing a thermosetting resin, a fence is installed for preventing rapid diffusion of a gas generated by the reaction of the thermosetting resin with a curing agent to the outside of the mold at the time of degassing. In the inside of the fence, a reflecting mirror is installed for forming an optical path along which light of an optical measuring means passes via the reflecting mirror. Thus, an ammonia gas in the inside of the fence is measured by an optical measuring means (FT-IR) while ensuring a short optical path length and a long transmission distance in the generated gas, enabling the change in the amount of the ammonia gas to be measured correctly and stably.

7. 发明专利

JP2002048781A MEASURING METHOD OF AMMONIA GAS GENERATED DURING THERMAL MOLDING OF FRICTION MATERIAL 失效
公开(公告)号：JP2002048781A
公开(公告)日：2002-02-15
申请号：JP2000231238
申请日：2000-07-31
申请人： AKEBONO RES & DEV CENTRE
发明人： KURIHARA SEI , ARAI KATSUO
IPC分类号： G01N33/00 , B29C51/26 , B29C51/40 , B29C51/46 , C09K3/14 , G01N21/35 , G01N21/3504
摘要： PROBLEM TO BE SOLVED: To provide a friction material having excellent quality by grasping the state of a hardening reaction quickly and accurately, by measuring the quantity of reaction gas generated during a thermal molding process of the friction material including a thermosetting. resin, accurately and stably on real time. SOLUTION: In this measuring method of gas, the quantity of ammonia is determined by measuring the gas generated by a reaction of the thermosetting resin with a hardening agent by an optical measuring means during thermal molding of the friction material including the thermosetting resin. In the method, a fence for preventing sudden diffusion of generated gas to the outside of a die at the degassing time is installed in the die, and an optical path is set so that an infrared ray outputted from a light-emitting part outside the die is transmitted through the generated gas in the fence of the die and inputted in a light-receiving part outside the die, and the light-emitting part is connected to the light-receiving part through a personal computer, to thereby measure the change of the quantity of the ammonia gas.

8. 发明专利

JP2002036269A METHOD FOR MEASURING AMMONIA GAS GENERATED DURING THERMOFORMING OF FRICTION MATERIAL 失效
公开(公告)号：JP2002036269A
公开(公告)日：2002-02-05
申请号：JP2000231237
申请日：2000-07-31
申请人： AKEBONO RES & DEV CENTRE
发明人： KURIHARA SEI , ARAI KATSUO
IPC分类号： G01N33/00 , B29C43/02 , B29C43/18 , B29C43/58 , C08J5/14 , C09K3/14 , G01N21/35 , G01N21/3504
摘要： PROBLEM TO BE SOLVED: To obtain a friction material having excellent quality by rapidly and accurately grasping a curing reaction state by stably measuring the amount of reaction gas generated in a thermoforming process of the friction material containing a thermosetting resin. SOLUTION: A fence for preventing the sudden diffusion of the gas, which is generated by the reaction of the thermosetting resin and a curing agent, to a mold at the time of venting is provided to the mold for molding a preformed object of the friction material containing the thermosetting resin and carrier gas is introduced into the fence and the discharged gas from the fence is guided to the gas cell connected to the fence and ammonia gas is measured in the gas cell by an optical measuring means (FT-IR or the like) to accurately and stably measure a change in the amount of the ammonia gas.

9. 发明专利

JP2002226832A METHOD FOR EVALUATING MIXED STATE OF STIRRED FRICTION MATERIAL 失效
公开(公告)号：JP2002226832A
公开(公告)日：2002-08-14
申请号：JP2001027147
申请日：2001-02-02
申请人： AKEBONO RES & DEV CENTRE
发明人： ARAI KATSUO , KURIHARA SEI
IPC分类号： G01N23/225 , C09K3/14 , G01N21/17 , G01N21/64
摘要： PROBLEM TO BE SOLVED: To obtain a friction material having stable quality and performances by quantitatively evaluating a mixed state of the stirred material of friction material for a brake. SOLUTION: This method for evaluating the mixed state of the stirred friction material is characterized by quantitatively evaluating the mixed state of the stirred material of friction material by discriminating between the objective material of evaluation of the friction material and nonobjective materials thereof and dividing the materials into two values with using an image analysis device and quantitatively measuring a size, an amount and a dispersed state of the objective material of evaluation.

10. 发明专利

JP2003127155A METHOD FOR DEGASSING FRICTION MATERIAL IN THERMOFORMING PROCESS 审中-公开
公开(公告)号：JP2003127155A
公开(公告)日：2003-05-08
申请号：JP2001326416
申请日：2001-10-24
申请人： AKEBONO RES & DEV CENTRE
发明人： SASAKI YOSUKE , ARAI KATSUO , KUSAKA SATOSHI , KURIHARA SEI
IPC分类号： F16D69/00 , B29C43/02 , B29C43/36 , B29C43/52 , B29L31/16
摘要： PROBLEM TO BE SOLVED: To provide a degassing method for preventing the occurrence of defective molding such as a crack and a blister and a thermoforming method for friction material which can obtain the friction material excellent in quality at a high temperature in a short time. SOLUTION: In the method for degassing the friction material in a thermoforming process, in a method for producing the material in which a preliminary molding of a raw material for the material is thermoformed by using a mold for thermoforming the material comprising a press mold, a middle mold, and a pressurization mold, temperature differences are formed in the press mold and the pressurization mold, a part in which the preliminary molding is last cured during thermoforming is biased toward the press mold or the pressurization mold, and a projection having a vent passage which is inserted into the final curing part and connected to the outside is formed in the press mold or the pressurization mold corresponding to the final curing part so that gas can be discharged from the final curing part.

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