Patents by Inventor Takehiko Sumi
Takehiko Sumi 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: 11833723Abstract: The present invention provides a process for producing a blow-molded foam including foamed cells, the process including: kneading a polyolefin-based resin containing a foaming agent mixed therewith in an extruder, and extruding a parison formed of the polyolefin-based resin between split mold blocks from a die slit at an extrusion rate of 700 kg/h or more.Type: GrantFiled: May 21, 2021Date of Patent: December 5, 2023Assignee: KYORAKU CO., LTD.Inventors: Masaaki Onodera, Takehiko Sumi, Teruo Tamada, Yu Igarashi, Yoshinori Ohno
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Publication number: 20210276232Abstract: The present invention provides a process for producing a blow-molded foam including foamed cells, the process including: kneading a polyolefin-based resin containing a foaming agent mixed therewith in an extruder, and extruding a parison formed of the polyolefin-based resin between split mold blocks from a die slit at an extrusion rate of 700 kg/h or more.Type: ApplicationFiled: May 21, 2021Publication date: September 9, 2021Applicant: KYORAKU CO., LTD.Inventors: Masaaki ONODERA, Takehiko SUMI, Teruo TAMADA, Yu IGARASHI, Yoshinori OHNO
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Patent number: 11045982Abstract: An object of the invention is to provide a blow-molded foam which has homogeneous foamed cells in size, is light in weight, and is excellent in surface smoothness, and a process for producing the same. The invention is directed to a blow-molded foam 1 having a wall portion formed in such a manner that a thermoplastic resin containing a foaming agent mixed therewith is subjected to blow molding. Herein, the wall portion has a closed cell structure in which a plurality of foamed cells are contained. The wall portion has an expansion ratio of not less than 2.0 times. The wall portion has an outer face having a center-line average surface roughness Ra of less than 9.0 ?m. The foamed cell has a cell diameter having a standard deviation of less than 40 ?m in a thickness direction of the wall portion.Type: GrantFiled: June 28, 2019Date of Patent: June 29, 2021Assignee: KYORAKU CO., LTD.Inventors: Masaaki Onodera, Takehiko Sumi, Teruo Tamada, Yu Igarashi, Yoshinori Ohno
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Patent number: 10668652Abstract: A molding method of a resin molded product in which it is possible to increase the welding strength between the core member and the resin sheets. In a molding method of a resin molded product in which a core member including a foaming element is interposed between at least two resin sheets in a melted state into a laminated product, wherein the resin sheets include fibrous filler, and while melting surfaces of the core member by heat of the resin sheets, the core member and the resin sheets are welded onto each other, and the core member and the resin sheets are clamped by a metallic mold, to mold the resin molded product.Type: GrantFiled: July 28, 2016Date of Patent: June 2, 2020Assignee: KYORAKU CO., LTD.Inventor: Takehiko Sumi
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Patent number: 10611113Abstract: Provided is a resin panel without warpage, in which weight reduction and high rigidity of the resin panel have been promoted. The resin panel according to an aspect of the present invention is a resin panel having a back wall, a front wall facing the back wall with a gap therebetween, and ribs formed by having portions of the back wall depressed toward the front wall and welded to the inner surface of the front wall, characterized in that the back wall, the front wall and the ribs are configured by mold-clamping, in a split mold, a first molten resin in a molten state and incorporating a plate-shaped filler, which constitutes the back wall, and a second molten resin in a molten state and incorporating a plate-shaped filler, which constitutes the front wall, the first molten resin and the second molten resin having been extruded and flowed out from an extrusion apparatus, and the longitudinal direction of the ribs is non-parallel to the direction of flow of the first molten resin and the second molten resin.Type: GrantFiled: August 20, 2014Date of Patent: April 7, 2020Assignee: KYORAKU CO., LTD.Inventors: Sho Nakajima, Takehiko Sumi
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Publication number: 20190322009Abstract: An object of the invention is to provide a blow-molded foam which has homogeneous foamed cells in size, is light in weight, and is excellent in surface smoothness, and a process for producing the same. The invention is directed to a blow-molded foam 1 having a wall portion formed in such a manner that a thermoplastic resin containing a foaming agent mixed therewith is subjected to blow molding. Herein, the wall portion has a closed cell structure in which a plurality of foamed cells are contained. The wall portion has an expansion ratio of not less than 2.0 times. The wall portion has an outer face having a center-line average surface roughness Ra of less than 9.0 ?m. The foamed cell has a cell diameter having a standard deviation of less than 40 ?m in a thickness direction of the wall portion.Type: ApplicationFiled: June 28, 2019Publication date: October 24, 2019Inventors: Masaaki ONODERA, Takehiko SUMI, Teruo TAMADA, Yu IGARASHI, Yoshinori OHNO
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Patent number: 10369727Abstract: An object of the invention is to provide a blow-molded foam which has homogeneous foamed cells in size, is light in weight, and is excellent in surface smoothness, and a process for producing the same. The invention is directed to a blow-molded foam 1 having a wall portion formed in such a manner that a thermoplastic resin containing a foaming agent mixed therewith is subjected to blow molding. Herein, the wall portion has a closed cell structure in which a plurality of foamed cells are contained. The wall portion has an expansion ratio of not less than 2.0 times. The wall portion has an outer face having a center-line average surface roughness Ra of less than 9.0 ?m. The foamed cell has a cell diameter having a standard deviation of less than 40 ?m in a thickness direction of the wall portion.Type: GrantFiled: May 16, 2016Date of Patent: August 6, 2019Assignee: KYORAKY CO., LTD.Inventors: Masaaki Onodera, Takehiko Sumi, Teruo Tamada, Yu Igarashi, Yoshinori Ohno
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Patent number: 10232598Abstract: A skinned panel for stably molding a thin skin material and a molding method thereof. An extruding device is configured to extrude a pair of multilayered resin sheets, each of which has a lamination structure of an inner layer made of a foamed resin and an outer layer made of a non-foamed resin that is changed into a skin material of a sandwich panel as a skinned panel. The pair of the resin sheets is abutted to the circumferential part of the pair of the split molds for producing sealed spaces. The sealed spaces are sucked for pressing the pair of the resin sheets onto cavities of the pair of the split molds. Accordingly, the pair of the resin sheets is formed in a shape substantially identical to the outline of the sandwich panel.Type: GrantFiled: June 30, 2010Date of Patent: March 19, 2019Assignee: KYORAKU CO., LTD.Inventor: Takehiko Sumi
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Patent number: 10179441Abstract: A resin panel of which contact surfaces of a rear wall to be in contact with another member are made unlikely to deform while reducing the weight of the resin panel. The panel includes a rear wall having a plurality of contact surfaces to be in contact with another member, and a front wall opposing the rear wall with an interval therebetween, the resin panel including a plurality of ribs obtained by indenting parts of the rear wall toward the front wall and welding the parts to an inner surface of the front wall, wherein a wall thickness of the front wall is generally equal to or smaller than a wall thickness of the rear wall.Type: GrantFiled: November 28, 2017Date of Patent: January 15, 2019Assignee: KYORAKU CO., LTD.Inventors: Takehiko Sumi, Kiyotaka Kawai
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Patent number: 10112361Abstract: An object of the present invention is to provide a core member for a sandwich panel and a method of forming the core member for the sandwich panel which are capable of attaining a desired profile, a desired pattern on its surface, and a desired inner structure in accordance with an application of the sandwich panel. According to an aspect of the invention, there is provided a thermoplastic resin core member interposed between two resin skin sheets comprising a closed hollow portion located to be inside of a desired position in accordance with an application of the sandwiched panel, and it is formed by clamping parison of a molten thermoplastic resin positioned to be between two split molds so as to exhibit a desired profile and/or a surface shape, two surfaces against each of which the molten parison is pressed to form an adhesive surface on which the corresponding resin skin sheet is formed.Type: GrantFiled: April 30, 2009Date of Patent: October 30, 2018Assignee: KYORAKU CO., LTD.Inventors: Takehiko Sumi, Tadatoshi Tanji
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Patent number: 9981443Abstract: A core member for a sandwich panel and a method of forming the core member for the sandwich panel which are capable of attaining a desired profile, a desired pattern on their surfaces, and a desired inner structure in accordance with an application of the sandwich panel. There is provided a thermoplastic resin core member interposed between two resin skin sheets comprising a closed hollow portion located to be inside of a desired position in accordance with an application of the sandwiched panel, and it is formed by clamping parison of a molten thermoplastic resin positioned to be between two split molds so as to exhibit a desired profile and/or a surface shape, two surfaces against each of which the molten parison is pressed to form an adhesive surface on which the corresponding resin skin sheet is formed.Type: GrantFiled: August 12, 2014Date of Patent: May 29, 2018Assignee: KYORAKU CO., LTD.Inventors: Takehiko Sumi, Tadatoshi Tanji
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Publication number: 20180079164Abstract: A resin panel of which contact surfaces of a rear wall to be in contact with another member are made unlikely to deform while reducing the weight of the resin panel. The panel includes a rear wall having a plurality of contact surfaces to be in contact with another member, and a front wall opposing the rear wall with an interval therebetween, the resin panel including a plurality of ribs obtained by indenting parts of the rear wall toward the front wall and welding the parts to an inner surface of the front wall, wherein a wall thickness of the front wall is generally equal to or smaller than a wall thickness of the rear wall.Type: ApplicationFiled: November 28, 2017Publication date: March 22, 2018Applicant: KYORAKU CO., LTD.Inventors: Takehiko SUMI, Kiyotaka KAWAI
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Patent number: 9862162Abstract: A resin panel of which contact surfaces of a rear wall to be in contact with another member are made unlikely to deform while reducing the weight of the resin panel. The panel includes a rear wall having a plurality of contact surfaces to be in contact with another member, and a front wall opposing the rear wall with an interval therebetween, the resin panel including a plurality of ribs obtained by indenting parts of the rear wall toward the front wall and welding the parts to an inner surface of the front wall, wherein a wall thickness of the front wall is generally equal to or smaller than a wall thickness of the rear wall.Type: GrantFiled: November 9, 2012Date of Patent: January 9, 2018Assignee: KYORAKU CO., LTD.Inventors: Takehiko Sumi, Kiyotaka Kawai
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Publication number: 20160332343Abstract: A molding method of a resin molded product in which it is possible to increase the welding strength between the core member and the resin sheets. In a molding method of a resin molded product in which a core member including a foaming element is interposed between at least two resin sheets in a melted state into a laminated product, wherein the resin sheets include fibrous filler, and while melting surfaces of the core member by heat of the resin sheets, the core member and the resin sheets are welded onto each other, and the core member and the resin sheets are clamped by a metallic mold, to mold the resin molded product.Type: ApplicationFiled: July 28, 2016Publication date: November 17, 2016Applicant: KYORAKU CO., LTD.Inventor: Takehiko SUMI
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Publication number: 20160257040Abstract: An object of the invention is to provide a blow-molded foam which has homogeneous foamed cells in size, is light in weight, and is excellent in surface smoothness, and a process for producing the same. The invention is directed to a blow-molded foam 1 having a wall portion formed in such a manner that a thermoplastic resin containing a foaming agent mixed therewith is subjected to blow molding. Herein, the wall portion has a closed cell structure in which a plurality of foamed cells are contained. The wall portion has an expansion ratio of not less than 2.0 times. The wall portion has an outer face having a center-line average surface roughness Ra of less than 9.0 ?m. The foamed cell has a cell diameter having a standard deviation of less than 40 ?m in a thickness direction of the wall portion.Type: ApplicationFiled: May 16, 2016Publication date: September 8, 2016Inventors: Masaaki ONODERA, Takehiko SUMI, Teruo TAMADA, Yu IGARASHI, Yoshinori OHNO
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Publication number: 20160200032Abstract: Provided is a resin panel without warpage, in which weight reduction and high rigidity of the resin panel have been promoted. The resin panel according to an aspect of the present invention is a resin panel having a back wall, a front wall facing the back wall with a gap therebetween, and ribs formed by having portions of the back wall depressed toward the front wall and welded to the inner surface of the front wall, characterized in that the back wall, the front wall and the ribs are configured by mold-clamping, in a split mold, a first molten resin in a molten state and incorporating a plate-shaped filler, which constitutes the back wall, and a second molten resin in a molten state and incorporating a plate-shaped filler, which constitutes the front wall, the first molten resin and the second molten resin having been extruded and flowed out from an extrusion apparatus, and the longitudinal direction of the ribs is non-parallel to the direction of flow of the first molten resin and the second molten resin.Type: ApplicationFiled: August 20, 2014Publication date: July 14, 2016Applicant: KYORAKU CO., LTD.Inventors: Sho NAKAJIMA, Takehiko SUMI
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Patent number: 9340091Abstract: An object of the invention is to provide a blow-molded foam which has homogeneous foamed cells in size, is light in weight, and is excellent in surface smoothness, and a process for producing the same. The invention is directed to a blow-molded foam 1 having a wall portion formed in such a manner that a thermoplastic resin containing a foaming agent mixed therewith is subjected to blow molding. Herein, the wall portion has a closed cell structure in which a plurality of foamed cells are contained. The wall portion has an expansion ratio of not less than 2.0 times. The wall portion has an outer face having a center-line average surface roughness Ra of less than 9.0 ?m. The foamed cell has a cell diameter having a standard deviation of less than 40 ?m in a thickness direction of the wall portion.Type: GrantFiled: July 24, 2013Date of Patent: May 17, 2016Assignee: KYORAKU CO., LTD.Inventors: Masaaki Onodera, Takehiko Sumi, Teruo Tamada, Yu Igarashi, Yoshinori Ohno
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Patent number: 9283895Abstract: An object of the present invention is to provide a sandwich panel which is capable of securing its flexural or its shear rigidity as a whole and securing a compression rigidity of a core material itself, while at the same time of readily reducing the weight of the sandwich panel.Type: GrantFiled: October 31, 2009Date of Patent: March 15, 2016Assignee: KYORAKU CO., LTD.Inventors: Takehiko Sumi, Sumio Nagai, Tadatoshi Tanji
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Patent number: 9193100Abstract: The invention provides a molded foam molding method capable of obtaining a molded foam in which pinholes may not be formed with ease even when a blow ratio is high and which has a high expansion ratio. The invention also provides a molded foam which includes no pinholes, is reduced in weight, and is excellent in heat insulating property. The molding method includes blending a polypropylene-based resin having an equilibrium compliance from 2.0 to 6.0 (10?3×Pa?1) with a foaming agent and kneading the blend in an extruder. The extruded foamed resin is molded so as to be fit along a mold by a pressurized fluid. Moreover, the molded foam is formed by the method described above, and has an expansion ratio from 1.5 to 5.0 times and an impact strength of not less than 30 kg·cm.Type: GrantFiled: October 27, 2010Date of Patent: November 24, 2015Assignee: KYORAKU CO., LTD.Inventors: Masaaki Onodera, Takehiko Sumi, Teruo Tamada, Yu Igarashi, Yoshinori Ohno
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Patent number: 9186955Abstract: An object of the invention is to provide a blow-molded foam which has homogeneous foamed cells in size, is light in weight, and is excellent in surface smoothness, and a process for producing the same. The invention is directed to a blow-molded foam 1 having a wall portion formed in such a manner that a thermoplastic resin containing a foaming agent mixed therewith is subjected to blow molding. Herein, the wall portion has a closed cell structure in which a plurality of foamed cells are contained. The wall portion has an expansion ratio of not less than 2.0 times. The wall portion has an outer face having a center-line average surface roughness Ra of less than 9.0 ?m. The foamed cell has a cell diameter having a standard deviation of less than 40 ?m in a thickness direction of the wall portion.Type: GrantFiled: July 24, 2013Date of Patent: November 17, 2015Assignee: KYORAKU CO., LTD.Inventors: Masaaki Onodera, Takehiko Sumi, Teruo Tamada, Yu Igarashi, Yoshinori Ohno