Fabrication of Complex-Shape Products From a Binder-Free Green Composite Using Bamboo Fibers and Powders Extracted With a Machining Center

2017 ◽  
Author(s):  
Kota Inoue ◽  
Antoine Bigeard ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Keiji Ogawa ◽  
...  
Keyword(s):  
New Method ◽  
Shell Shape ◽  
Hot Press ◽  
Green Composite ◽  
Hemispherical Shell ◽  
Machining Center ◽  
Hot Press Forming ◽  
One Step ◽  
Binder Free ◽  
Bamboo Fibers

Research is currently ongoing for composite materials using natural fiber with a small burden on the environment. We have been focusing on bamboo because of its fast growth, renewability, flexibility, low cost, and high specific strength. We previously proposed a novel hot press fabrication method for binder-free green composite products made from bamboo fibers extracted by end-milling with a machining center. We can use this method to form three-dimensionally shaped products, especially hemispherical shells, by using two kinds of dies. However, this method is complex and takes longer than one-step hot press forming. In the present report, we propose a new method that uses bamboo powder with a particle size of less than 500 μm. Our new method uses one-step hot press forming and is quicker than the previous method at making a hemispherical shell shape. The new method was successfully used to manufacture hemispherical shell-shape products.

Fabrication of Binder-Free Green Composite Using Bamboo Fibers Extracted with a Machining Center

2010 ◽  
Vol 447-448 ◽  
pp. 760-764 ◽  
Author(s):  
Keiji Ogawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Mitsuaki Taniguchi ◽  
Sachiko Ogawa
Keyword(s):  
Present Report ◽  
Bamboo Fiber ◽  
Hot Press ◽  
Green Composite ◽  
Forming Process ◽  
Machining Center ◽  
Press Forming ◽  
Hot Press Forming ◽  
Binder Free ◽  
Bamboo Fibers

Bamboo grows faster than other renewable natural materials. Bamboo fiber, in particular, has attracted attention as an environmentally superior material. Therefore, we proposed a sustainable manufacturing system using bamboo. An extraction method of bamboo fibers end-milled using a machining center with in-situ measurement is proposed. Bamboo fibers with high precision shape are efficiently acquired. In the present report, we propose the fabrication of binder-free composite by a hot press forming method that only uses bamboo fibers extracted by a machining center. We experimentally demonstrated various hot press forming conditions and achieved proper forming conditions to optimize the forming process. We also made various three-dimensional shapes considering the practical applications of the formed binder-free bamboo fiber moldings.

Binder-Free Green Composite Using Bamboo Fibers Extracted with a Machining Center-Investigation of Optimal Bamboo Fiber Length

2014 ◽  
Vol 625 ◽  
pp. 355-359
Author(s):  
Shinya Imura ◽  
Keiji Ogawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama
Keyword(s):  
Sustainable Manufacturing ◽  
Bamboo Fiber ◽  
Hot Press ◽  
Green Composite ◽  
Forming Process ◽  
Machining Center ◽  
Press Forming ◽  
Hot Press Forming ◽  
Binder Free ◽  
Bamboo Fibers

Bamboo grows faster than other renewable natural materials. Bamboo fiber, in particular, has attracted attention as an environmentally superior material. Therefore, we propose a sustainable manufacturing system using bamboo. A method is also proposed for extracting bamboo fibers end-milled using a machining center with in-situ measurement. Bamboo fibers with highly precise shapes are efficiently acquired. Previously, we proposed the fabrication of a binder-free composite by a hot press forming method that only uses bamboo fibers extracted by a machining center. We experimentally demonstrated various hot press forming conditions and achieved proper ones to optimize the forming process. However, we have not yet constructed a method to obtain the best fiber extracting and molding conditions considering both its efficiency and performance. Therefore, in this report, we investigate the influence of the length of used bamboo fiber on the characteristics of the molded products, as its length deeply affects the extracting efficiency and focuses on a degradable plastic as a standard of molded product strength.

Fabrication of plate and spoon products made of binder-free green composite using bamboo fibers extracted with a machining center

2020 ◽  
Vol 2020 (0) ◽  
pp. S14305
Author(s):  
Shouq ALANSARI ◽  
Daigo TAUCHI ◽  
Hiromichi NOBE ◽  
Toshiki HIROGAKI ◽  
Eichi AOYAMA
Keyword(s):  
Green Composite ◽  
Machining Center ◽  
Binder Free ◽  
Bamboo Fibers

Binder-Free Green Composite Using Bamboo Fibres Extracted with a Machining Centre: Influence of Moisture Absorption on Mechanical Properties

2012 ◽  
Vol 516 ◽  
pp. 215-221 ◽  
Author(s):  
Yota Takagi ◽  
Keiji Ogawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama
Keyword(s):  
Moisture Absorption ◽  
Sustainable Manufacturing ◽  
Hot Press ◽  
Green Composite ◽  
Forming Process ◽  
Press Forming ◽  
Mechanical Object ◽  
Hot Press Forming ◽  
Binder Free

Bamboo grows faster than other renewable natural materials. Bamboo fibre, in particular, has attracted attention as an environmentally superior material. Therefore, we proposed a sustainable manufacturing system using bamboo. An extraction method of bamboo fibres end-milled using a machining centre with in-situ measurement was also proposed. Bamboo fibres with high precision shapes are efficiently acquired. Previously, we proposed the fabrication of binder-free composite by a hot press forming method that only uses bamboo fibres extracted by a machining centre. We experimentally demonstrated various hot press forming conditions and achieved proper ones to optimize the forming process. However, when the environment changes, the characteristics of the binder-free composite are not known. If we want to use the binder-free composite, we have to know how much it is affected by the external environment for use as a mechanical object. Therefore, we investigated the changes of the characteristics at high temperature and high humidity.

scholarly journals Fabrication of 9,9′-Bis(aryl)fluorene-modified nanocellulose bamboo fiber composite

BioResources ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 3907-3915
Author(s):  
Khan Md Sefat ◽  
Takashi Kurose ◽  
Masahiro Yamada ◽  
Hiroshi Ito ◽  
Shinichi Shibata
Keyword(s):  
Mechanical Properties ◽  
Cross Sections ◽  
Fiber Composite ◽  
Flexural Modulus ◽  
Bamboo Fiber ◽  
Cellulose Nanofiber ◽  
Hot Press ◽  
Green Composite ◽  
Hot Press Forming ◽  
Bamboo Fibers

A green composite was fabricated using bamboo fiber and 9,9′-bis(aryl)fluorene-modified cellulose nanofiber (FCNF). Cellulose nanofiber (CNF) and finely crushed bamboo fiber (CBF) were also used as binders. The mechanical properties of the composites were compared. It was found that the FCNF-bamboo fiber composite had the maximum flexural strength among these binders. This result was likely due to strong bonding by chemical reactions among fibers and the FCNF. The effect of fiber orientation accuracy on the mechanical properties of the composites was also investigated. When the bamboo fibers were carefully aligned, without fibers crossing each other, the mechanical properties increased by two times, compared to the composites with fibers crossing each other. In the accurately aligned bamboo composites, the cross sections of the fibers were largely deformed by compression stress during hot-press forming. Thus, the gaps among fibers decreased, and interfacial adherence was improved. The effect of fabrication temperature on the mechanical properties of the FCNF-bamboo composite was also examined. It was found that the maximum flexural modulus and strength of the composites were at approximately 250 °C, and the mechanical properties rapidly decreased above 270 °C due to thermal degradation of the bamboo fiber.

scholarly journals Driving Performance of Natural Fiber Gears Made Only from Bamboo Fibers Extracted with a Machining Center

2020 ◽  
Vol 14 (2) ◽  
pp. 280-293
Author(s):  
Tetsuya Kawabata ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Hiromichi Nobe ◽  
◽  
...  
Keyword(s):  
Bending Strength ◽  
Natural Fiber ◽  
Spur Gear ◽  
Hot Press ◽  
Machining Center ◽  
Machine Element ◽  
Press Method ◽  
Bamboo Fibers ◽  
Plastic Gears ◽  
Press Molding

Plastic gears are light and can be used without any lubricant, but they have low strength and an adverse effect on the environment. Therefore, a new gear that maintains these advantages while mitigating the disadvantages has been proposed. The development of sustainable and reproducible natural materials is desired to address these environmental problems. Therefore, in this study, a method was devised to extract high-quality and precise bamboo fibers using a machining center. Then, the hot press method was used to produce a novel spur gear made from only bamboo fibers, which is a green and organic machine element with a complicated shape. The present paper describes the characteristics of the proposed bamboo fiber gears, considering experimental results, including the hot press molding conditions, and the influence of fiber length on tooth bending strength, root strain, and vibration due to meshing teeth.

Driving Performance of Natural Fiber Gears Made From Only Bamboo Fibers Extracted With a Machining Center

2018 ◽  
Author(s):  
Takayuki Yanagawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Syota Matsui ◽  
Hiromichi Nobe
Keyword(s):  
Natural Fiber ◽  
Spur Gear ◽  
Tooth Root ◽  
Hot Press ◽  
Acceleration Measurement ◽  
Machining Center ◽  
Machine Element ◽  
Press Method ◽  
Bamboo Fibers ◽  
The Relationship

The advantages of a plastic gear are that it is light and can be used without any lubricant, and its disadvantages are that its strength is low and it has large environmental impact. Therefore, the development of a new gear that maintains the advantages while negating the disadvantages has been proposed. The development of sustainable and reproducible natural materials is particularly desired to address environmental problems. Therefore, in this study, a method was devised to extract high quality and highly precise bamboo fibers using a machining center. Then, the hot press method was used to produce a spur gear, which is a machine element with a complicated shape. The present paper describes the characteristics of the bamboo fiber gears investigated through experiments. The results of tooth root strain measurement showed the relationship between rotation speed and tooth root strain. In addition, we calculated the theoretical value of tooth root strain and compared it with the experimental value. The experimental value was lower than the calculated value. The results of acceleration measurement showed that that tooth root strain is associated with acceleration.

scholarly journals Hot press fabrication of hemisphere shell product made of bamboo fibers extracted with a machining center

2015 ◽  
Vol 9 (3) ◽  
pp. JAMDSM0044-JAMDSM0044
Author(s):  
Toshiki HIROGAKI ◽  
Eiichi AOYAMA ◽  
Minh HUYNH ◽  
Yusuke NAKAMURA ◽  
Keiji OGAWA ◽  
...  
Keyword(s):  
Hot Press ◽  
Machining Center ◽  
Bamboo Fibers
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