Injection molded plastic helical gear filled with carbon powder made from rice hull

Natural materials are focused on the ecological responsibility, all over the world. The rice-hull contains natural silica about 20 wt.%. Therefore, a carbonized rice-hull; Rice-Hull-Silica-Carbon (RHSC) is focused as effective utilization of the discarded rice hull. In this study, test plastic helic...

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Bibliographic Details
Main Authors: Chen, Yen Chu, Itagaki, Takayoshi, Takahashi, Hideo, Takahashi, Mikio
Format: Conference Proceeding
Language:English
Subjects:
Appliance industry
Carbon
Fatigue life
Fatigue tests
Gear teeth
Gears
Helical gears
Injection molding
Silicon dioxide
Sound pressure
Thermal resistance
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Summary:Natural materials are focused on the ecological responsibility, all over the world. The rice-hull contains natural silica about 20 wt.%. Therefore, a carbonized rice-hull; Rice-Hull-Silica-Carbon (RHSC) is focused as effective utilization of the discarded rice hull. In this study, test plastic helical gears were made form polyacetal copolymer filled with RHSC powder by injection molding. Test helical gears were operated on endurance test. The bulk temperature and noise of test gears were measured during gears operation. Then, the tooth damage of test gears were investigated by using optical microscope. It is clarified that difference of tooth damage by kind of test gears. Moreover, the transition of gear bulk temperature and noise during operation are investigated. Based on these results, the effect of RHSC powder is discussed. From the discussions, it seems reasonable to conclude : (1) The heat resistance of plastic gear is improved by adding the RHSC powder. (2) The fatigue life of plastic gear is improved by adding suitable amount of the RHSC powder. (3) The sound pressure level of plastic gear is reduced by adding the smaller median grain diameter of RHSC powder.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4993397