Patents by Inventor Toshio Ishikuro
Toshio Ishikuro has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9656416Abstract: An injection molding system is configured to produce a multi-color molded article by simultaneously or sequentially injection-molding resins of a plurality of types by means of a plurality of injection molding machines. An insert mold is mounted in a mold of a first injection molding machine and a primary molded article is molded by this injection molding machine. Thereafter, a robot arm takes out the insert mold, along with the primary molded article, from the mold of the injection molding machine and attaches it to a mold of a second injection molding machine. A two-color molded article is injection-molded by the second injection molding machine and removed as a product.Type: GrantFiled: September 18, 2013Date of Patent: May 23, 2017Assignee: FANUC CORPORATIONInventors: Satoshi Takatsugi, Toshio Ishikuro, Ryousuke Mori
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Publication number: 20160114507Abstract: An injection molding system includes a cavity moving unit configured to move the movable side mold, for positioning at least one cavity selected arbitrarily in fillable position such that resin injected is configured to fill the cavity in fillable position when the molds are closed and at least one cavity, different from the cavity in the fillable position, in ejectable position such that a molded item in the ejectable position is configured to be taken out when the molds are closed, and a molded item ejection unit configured to eject the molded item in the cavity positioned in the ejectable position when the molds are closed.Type: ApplicationFiled: October 21, 2015Publication date: April 28, 2016Inventors: Tatsuhiro UCHIYAMA, Naoaki SEKI, Toshio ISHIKURO
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Publication number: 20140077410Abstract: An injection molding system is configured to produce a multi-color molded article by simultaneously or sequentially injection-molding resins of a plurality of types by means of a plurality of injection molding machines. An insert mold is mounted in a mold of a first injection molding machine and a primary molded article is molded by this injection molding machine. Thereafter, a robot arm takes out the insert mold, along with the primary molded article, from the mold of the injection molding machine and attaches it to a mold of a second injection molding machine. A two-color molded article is injection-molded by the second injection molding machine and removed as a product.Type: ApplicationFiled: September 18, 2013Publication date: March 20, 2014Applicant: FANUC CORPORATIONInventors: Satoshi TAKATSUGI, Toshio ISHIKURO, Ryousuke MORI
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Molding material feed screw used in a molding material supply device of an injection molding machine
Patent number: 8192193Abstract: A notched region in which the outer periphery of a screw flight is cut out is provided in a molding material feed screw. A wedge-shaped portion is formed by both a front wall surface of the screw flight and a wall surface of the boundary where the outer periphery of the screw flight is cut out. As a result of rotation of the molding material feed screw, since the wedge-shaped portion advances while pushing aside resin pellets located in the front thereof in two lateral directions of the front wall surface of the screw flight and the wall surface of the boundary where the outer diameter of the screw flight is cut out, entrapment of the resin pellets between the edge of a material supply port of a molding material supply device and the outer periphery of the screw flight is avoided as much as possible.Type: GrantFiled: June 6, 2011Date of Patent: June 5, 2012Assignee: Fanuc CorporationInventors: Hiroyasu Asaoka, Junpei Maruyama, Wataru Shiraishi, Toshio Ishikuro, Akira Oomori -
Publication number: 20120040038Abstract: A notched region in which the outer periphery of a screw flight is cut out is provided in a molding material feed screw. A wedge-shaped portion is formed by both a front wall surface of the screw flight and a wall surface of the boundary where the outer periphery of the screw flight is cut out. As a result of rotation of the molding material feed screw, since the wedge-shaped portion advances while pushing aside resin pellets located in the front thereof in two lateral directions of the front wall surface of the screw flight and the wall surface of the boundary where the outer diameter of the screw flight is cut out, entrapment of the resin pellets between the edge of a material supply port of a molding material supply device and the outer periphery of the screw flight is avoided as much as possible.Type: ApplicationFiled: June 6, 2011Publication date: February 16, 2012Applicant: FANUC CORPORATIONInventors: Hiroyasu ASAOKA, Junpei MARUYAMA, Wataru SHIRAISHI, Toshio ISHIKURO, Akira OOMORI
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Patent number: 7665978Abstract: A mold is mounted with a locating ring mated into a hole in a stationary platen. A distance measuring unit is disposed to the side of the injection nozzle. The distance A between the sprue hole and the outer circumference of the locating ring and the distance B between the distance measuring unit and the outer circumference of the locating ring are both known. The distance C between the central axis of the nozzle hole and the side of the injection nozzle is also known. If the distance D to the side of the injection nozzle is measured by means of the distance measuring unit, the displacement between the central axis of the sprue hole and the central axis of the nozzle hole is obtained by calculating {(A+B)?(C+D)}. The injection nozzle is centered by being moved manually or automatically by the amount corresponding to the displacement.Type: GrantFiled: January 13, 2005Date of Patent: February 23, 2010Assignee: Fanuc LtdInventors: Satoshi Takatsugi, Wataru Shiraishi, Toshio Ishikuro, Hiroyasu Asaoka, Hiroshi Imamura
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Patent number: 7452198Abstract: A controller for an injection molding machine capable of reducing an extension of a cycle time in a screw retreat process after the end of measurement, obtaining a more accurate and uniform measured resin amount, and determining measurement conditions in a short period of time. After the measurement is finished, the screw is stopped from rotating and retreated at a first speed V1. The screw is reversely rotated at a predetermined speed Rv in a set zone. As this is done, the screw is retreated at a second speed V2 lower than the first speed V1. After the reverse rotation zone is terminated, the screw is stopped from rotating and retreated at a third speed V3 to a set retreat stop position. By doing this, the cycle time can be made shorter than in the case where the retreat and reverse rotation of the screw are performed separately. Since the retreating speed of the screw is low while the screw is being reversely rotated, a sudden pressure change can be suppressed, so that precise measurement can be made.Type: GrantFiled: February 22, 2007Date of Patent: November 18, 2008Assignee: Fanuc LtdInventors: Wataru Shiraishi, Toshio Ishikuro, Satoshi Takatsugi, Tatsuhiro Uchiyama, Hiroshi Watanabe, Tatsuya Kawasaki, Junpei Maruyama
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Patent number: 7435070Abstract: When a metering process is started, a screw rotates at a preset rotating speed, thereby carrying out back pressure control to keep the pressure of a resin at a preset pressure, and retreats. When the screw is located near a preset metering completion position, the control mode is switched to positioning control for the preset metering completion position, and a screw rotation stop command is outputted. The screw overruns for some distance before its rotation stops after it retreats and stops at the preset metering completion position. A resin quantity for the overrun is corrected to obtain a preset metered resin quantity by reversely rotating the screw by a rotational amount corresponding to the overrun.Type: GrantFiled: April 28, 2006Date of Patent: October 14, 2008Assignee: Fanuc Ltd.Inventors: Wataru Shiraishi, Satoshi Takatsugi, Toshio Ishikuro, Hiroyasu Asaoka
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Patent number: 7431583Abstract: The invention provides an injection molding capable of adjusting a detection level with a simple structure and detecting a deposit level of the resin pellets near a plasticizing screw. A cooling jacket is mounted so that a resin supplying hole of the cooling jacket communicates with a resin supplying hole of a heating cylinder. A sensor head mounted on a sensor mounting plate is inserted into the resin supplying hole through a sensor insertion port provided on a hopper plate and a resin inlet and detects the deposit level of the resin pellets deposited in the resin supplying hole. Changing the extent of insertion of the sensor head enables the resin pellets deposit detection level to be changed, and further, enables the deposit level near the outer periphery of the screw to be detected. Setting the sensor detection direction perpendicular to the resin deposit direction enables dirtying of the sensor detection surface by the resin pellets to be reduced, thus enabling erroneous detection readings to be reduced.Type: GrantFiled: July 24, 2006Date of Patent: October 7, 2008Assignee: Fanuc LtdInventors: Satoshi Takatsugi, Wataru Shiraishi, Hiroyasu Asaoka, Toshio Ishikuro, Hiroshi Imamura
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Publication number: 20070196530Abstract: A controller for an injection molding machine capable of reducing an extension of a cycle time in a screw retreat process after the end of measurement, obtaining a more accurate and uniform measured resin amount, and determining measurement conditions in a short period of time. After the measurement is finished, the screw is stopped from rotating and retreated at a first speed V1. The screw is reversely rotated at a predetermined speed Rv in a set zone. As this is done, the screw is retreated at a second speed V2 lower than the first speed V1. After the reverse rotation zone is terminated, the screw is stopped from rotating and retreated at a third speed V3 to a set retreat stop position. By doing this, the cycle time can be made shorter than in the case where the retreat and reverse rotation of the screw are performed separately. Since the retreating speed of the screw is low while the screw is being reversely rotated, a sudden pressure change can be suppressed, so that precise measurement can be made.Type: ApplicationFiled: February 22, 2007Publication date: August 23, 2007Applicant: FANUC LTDInventors: Wataru Shiraishi, Toshio Ishikuro, Satoshi Takatsugi, Tatsuhiro Uchiyama, Hiroshi Watanabe, Tatsuya Kawasaki, Junpei Maruyama
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Patent number: 7235198Abstract: When a metering process is started, a screw rotates at a preset rotating speed, thereby carrying out back pressure control to keep the pressure of a resin at a preset pressure, and retreats. When the screw is located near a preset metering completion position, the control mode is switched to positioning control for the preset metering completion position, and a screw rotation stop command is outputted. The screw overruns for some distance before its rotation stops after it retreats and stops at the preset metering completion position. A resin quantity for the overrun is corrected to obtain a preset metered resin quantity by reversely rotating the screw by a rotational amount corresponding to the overrun.Type: GrantFiled: November 7, 2003Date of Patent: June 26, 2007Assignee: Fanuc Ltd.Inventors: Wataru Shiraishi, Satoshi Takatsugi, Toshio Ishikuro, Hiroyasu Asaoka
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Publication number: 20070026096Abstract: The invention provides an injection molding capable of adjusting a detection level with a simple structure and detecting a deposit level of the resin pellets near a plasticizing screw. A cooling jacket is mounted so that a resin supplying hole of the cooling jacket communicates with a resin supplying hole of a heating cylinder. A sensor head mounted on a sensor mounting plate is inserted into the resin supplying hole through a sensor insertion port provided on a hopper plate and a resin inlet and detects the deposit level of the resin pellets deposited in the resin supplying hole. Changing the extent of insertion of the sensor head enables the resin pellets deposit detection level to be changed, and further, enables the deposit level near the outer periphery of the screw to be detected. Setting the sensor detection direction perpendicular to the resin deposit direction enables dirtying of the sensor detection surface by the resin pellets to be reduced, thus enabling erroneous detection readings to be reduced.Type: ApplicationFiled: July 24, 2006Publication date: February 1, 2007Applicant: FANUC LTDInventors: Satoshi Takatsugi, Wataru Shiraishi, Hiroyasu Asaoka, Toshio Ishikuro, Hiroshi Imamura
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Publication number: 20060193943Abstract: When a metering process is started, a screw rotates at a preset rotating speed, thereby carrying out back pressure control to keep the pressure of a resin at a preset pressure, and retreats. When the screw is located near a preset metering completion position, the control mode is switched to positioning control for the preset metering completion position, and a screw rotation stop command is outputted. The screw overruns for some distance before its rotation stops after it retreats and stops at the preset metering completion position. A resin quantity for the overrun is corrected to obtain a preset metered resin quantity by reversely rotating the screw by a rotational amount corresponding to the overrun.Type: ApplicationFiled: April 28, 2006Publication date: August 31, 2006Applicant: FANUC LTDInventors: Wataru shiraishi, Satoshi Takatsugi, Toshio Ishikuro, Hiroyasu Asaoka
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Publication number: 20050161848Abstract: A mold is mounted with a locating ring mated into a hole in a stationary platen. A distance measuring unit is disposed to the side of the injection nozzle. The distance A between the sprue hole and the outer circumference of the locating ring and the distance B between the distance measuring unit and the outer circumference of the locating ring are both known. The distance C between the central axis of the nozzle hole and the side of the injection nozzle is also known. If the distance D to the side of the injection nozzle is measured by means of the distance measuring unit, the displacement between the central axis of the sprue hole and the central axis of the nozzle hole is obtained by calculating {(A+B)?(C+D)}. The injection nozzle is centered by being moved manually or automatically by the amount corresponding to the displacement.Type: ApplicationFiled: January 13, 2005Publication date: July 28, 2005Inventors: Satoshi Takatsugi, Wataru Shiraishi, Toshio Ishikuro, Hiroyasu Asaoka, Hiroshi Imamura
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Publication number: 20040096534Abstract: When a metering process is started, a screw rotates at a preset rotating speed, thereby carrying out back pressure control to keep the pressure of a resin at a preset pressure, and retreats. When the screw is located near a preset metering completion position, the control mode is switched to positioning control for the preset metering completion position, and a screw rotation stop command is outputted. The screw overruns for some distance before its rotation stops after it retreats and stops at the preset metering completion position. A resin quantity for the overrun is corrected to obtain a preset metered resin quantity by reversely rotating the screw by a rotational amount corresponding to the overrun.Type: ApplicationFiled: November 7, 2003Publication date: May 20, 2004Applicant: Fanuc Ltd.Inventors: Wataru Shiraishi, Satoshi Takatsugi, Toshio Ishikuro, Hiroyasu Asaoka
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Publication number: 20030230829Abstract: An injection apparatus in an injection molding machine transmits a drive force generated by an injecting servomotor to a screw through a drive force transmitting mechanism to move the screw for performing injection. In addition, the injection apparatus has a dead zone of movement provided by a predetermined distance in the range of the injecting servomotor to the screw.Type: ApplicationFiled: May 2, 2003Publication date: December 18, 2003Applicant: Fanuc Ltd.Inventors: Wataru Shiraishi, Satoshi Takatsugi, Toshio Ishikuro