Patents by Inventor Daigo SAGA
Daigo SAGA 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: 11312056Abstract: A twin screw extruder (10) for producing a fiber-reinforced resin composition, which is obtained by charging the extruder with a thermoplastic resin and reinforcing fibers in roving form and the reinforcing fibers being fibrillated/cut and being dispersed/kneaded into the thermoplastic resin, comprises: a plate-shaped blade (15), which protrudes from the inner surface of a cylinder (11) and faces a screw (20) and the longitudinal direction of which faces the axial direction of the cylinder; and a height adjustment means (16) for adjusting the gap between the blade (15) and the screw (20).Type: GrantFiled: August 4, 2017Date of Patent: April 26, 2022Assignee: THE JAPAN STEEL WORKS, LTD.Inventors: Yoshitaka Kimura, Makoto Tojo, Daigo Saga
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Publication number: 20210138711Abstract: A twin screw extruder (10) for producing a fiber-reinforced resin composition, which is obtained by charging the extruder with a thermoplastic resin and reinforcing fibers in roving form and the reinforcing fibers being fibrillated/cut and being dispersed/kneaded into the thermoplastic resin, comprises: a plate-shaped blade (15), which protrudes from the inner surface of a cylinder (11) and faces a screw (20) and the longitudinal direction of which faces the axial direction of the cylinder; and a height adjustment means (16) for adjusting the gap between the blade (15) and the screw (20).Type: ApplicationFiled: August 4, 2017Publication date: May 13, 2021Applicant: THE JAPAN STEEL WORKS, LTD.Inventors: Yoshitaka KIMURA, Makoto TOJO, Daigo SAGA
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Patent number: 10882237Abstract: A first connecting portion (31) and a second connecting portion (33) slide over a first guide link (17) and a second guide link (19), respectively, when an operation point (OP) of a reciprocating linear motion mechanism (38) moves from an initiating position to a terminating position. A second acute angle (?2) formed between the second guide link (19) and a supporting surface (15) is greater than a first acute angle (?1) formed between the first guide link (17) and the supporting surface (15).Type: GrantFiled: December 10, 2015Date of Patent: January 5, 2021Assignee: THE JAPAN STEEL WORKS, LTD.Inventors: Katsuhiro Yoshida, Kenji Tomomitsu, Daigo Saga
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Patent number: 10850438Abstract: [Problem] To provide an injection apparatus including a flow path switching mechanism that is simple in construction and low in cost. [Solution] An injection apparatus (1) includes a plasticization device (2) for melting resin, a first and second plunger injection devices (4, 5) for measuring an amount of resin and injecting the resin, an injecting portion (8), and a flow path switching block (7) that connects the plasticization device, the first and second plunger injection devices and the injecting portion together. A first to fourth connecting flow paths (23a, 23b) and a flow path switching valve (21) are provided in the flow path switching block (7). The plasticization device (2), the first plunger injection device (4), the injecting portion (8) and the second plunger injection device (5) are connected to the first to fourth connecting flow paths (23a, 23b), respectively.Type: GrantFiled: February 1, 2017Date of Patent: December 1, 2020Assignee: THE JAPAN STEEL WORKS, LTD.Inventors: Akira Yasue, Masahiko Taketani, Kazuya Tsuji, Shigeki Inoue, Shoso Nishida, Daigo Saga, Takashi Harada
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Patent number: 10518441Abstract: An extruder (1) includes a cylinder (2) and a screw (3), and one or more front vents (8a) are provided on the cylinder (2) upstream of a hopper (5) and downstream of a rear vent (7). The cylinder (2) is provided with, between the hopper (5) and the rear vent (7), a liquid supply device (9) for spraying water into the cylinder (2) to cool an interior thereof and a liquid discharge port (12) that is opened in a lower portion of the cylinder (2).Type: GrantFiled: January 13, 2016Date of Patent: December 31, 2019Assignee: THE JAPAN STEEL WORKS, LTD.Inventors: Makoto Tojo, Yohei Shimizu, Daigo Saga
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Patent number: 10427325Abstract: A twin screw extruder (10) according to the present invention is a twin screw extruder (10), in which a reinforcing fiber is fed through an input port (18) into a molten thermoplastic resin having been formed in a resin feed part (13) and the reinforcing fiber and the molten thermoplastic resin pass through a kneading part (15) so that a fiber-reinforced resin composition is manufactured, wherein the kneading part (15) is provided at the discharge-side end part of the extruder (10); a conveying part (14) is provided between the input port (18) and the kneading part (15), and tip clearance (Sc) of a screw element (12b) configuring the conveying part (14) is larger than screw clearance (Ss).Type: GrantFiled: August 15, 2014Date of Patent: October 1, 2019Assignee: THE JAPAN STEEL WORKS, LTD.Inventors: Daigo Saga, Jun Kakizaki, Toshifumi Ohashi
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Publication number: 20190047195Abstract: [Problem] To provide an injection apparatus including a flow path switching mechanism that is simple in construction and low in cost. [Solution] An injection apparatus (1) includes a plasticization device (2) for melting resin, a first and second plunger injection devices (4, 5) for measuring an amount of resin and injecting the resin, an injecting portion (8), and a flow path switching block (7) that connects the plasticization device, the first and second plunger injection devices and the injecting portion together. A first to fourth connecting flow paths (23a, 23b) and a flow path switching valve (21) are provided in the flow path switching block (7). The plasticization device (2), the first plunger injection device (4), the injecting portion (8) and the second plunger injection device (5) are connected to the first to fourth connecting flow paths (23a, 23b), respectively.Type: ApplicationFiled: February 1, 2017Publication date: February 14, 2019Applicant: THE JAPAN STEEL WORKS, LTD.Inventors: Akira YASUE, Masahiko TAKETANI, Kazuya TSUJI, Shigeki INOUE, Shoso NISHIDA, Daigo SAGA, Takashi HARADA
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Publication number: 20180001514Abstract: An extruder (1) includes a cylinder (2) and a screw (3), and one or more front vents (8a) are provided on the cylinder (2) upstream of a hopper (5) and downstream of a rear vent (7). The cylinder (2) is provided with, between the hopper (5) and the rear vent (7), a liquid supply device (9) for spraying water into the cylinder (2) to cool an interior thereof and a liquid discharge port (12) that is opened in a lower portion of the cylinder (2).Type: ApplicationFiled: January 13, 2016Publication date: January 4, 2018Applicant: THE JAPAN STEEL WORKS, LTD.Inventors: Makoto TOJO, Yohei SHIMIZU, Daigo SAGA
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Publication number: 20170320252Abstract: A first connecting portion (31) and a second connecting portion (33) slide over a first guide link (17) and a second guide link (19), respectively, when an operation point (OP) of a reciprocating linear motion mechanism (38) moves from an initiating position to a terminating position. A second acute angle (?2) formed between the second guide link (19) and a supporting surface (15) is greater than a first acute angle (?1) formed between the first guide link (17) and the supporting surface (15).Type: ApplicationFiled: December 10, 2015Publication date: November 9, 2017Applicant: THE JAPAN STEEL WORKS, LTD.Inventors: Katsuhiro YOSHIDA, Kenji TOMOMITSU, Daigo SAGA
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Publication number: 20160257027Abstract: A screw extruder for industrially mass-producing a cellulose-containing composition having a high saccharification performance by continuously conducting pretreatment of cellulose-containing biomass to pretreatment, which screw extruder is characterized as including a raw-material feed portion, a pulverization section, a heating section and a cooling section, and having a plurality of seal rings arranged in the heating section.Type: ApplicationFiled: September 9, 2014Publication date: September 8, 2016Applicants: SHOWA DENKO K.K., THE JAPAN STEEL WORKS, LTD.Inventors: Ichiro FUJITA, Shinji YAMAKI, Tadashi YONEDA, Daigo SAGA
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Publication number: 20160214277Abstract: A twin screw extruder (10) according to the present invention is a twin screw extruder (10), in which a reinforcing fiber is fed through an input port (18) into a molten thermoplastic resin having been formed in a resin feed part (13) and the reinforcing fiber and the molten thermoplastic resin pass through a kneading part (15) so that a fiber-reinforced resin composition is manufactured, wherein the kneading part (14) is provided at the discharge-side end part of the extruder (10); a conveying part (14) is provided between the input port (18) and the kneading part (15), and tip clearance (Sc) of a screw element (12b) configuring the conveying part (14) is larger than screw clearance (Ss).Type: ApplicationFiled: August 15, 2014Publication date: July 28, 2016Applicant: THE JAPAN STEEL WORKS, LTD.Inventors: Daigo SAGA, Jun KAKIZAKI, Toshifumi OHASHI