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Study on the Accuracy of Injection Molded Plastic Gear with the Assistance of Supercritical Fluid and a Pressurized Mold

Title
Study on the Accuracy of Injection Molded Plastic Gear with the Assistance of Supercritical Fluid and a Pressurized Mold
Author
정태형
Keywords
injection molded plastic gear; pressurized mold; supercritical fluid; viscosity
Issue Date
2007-09
Publisher
TAYLOR & FRANCIS INC
Citation
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING, v. 46, No. 9, Page. 815-820
Abstract
Plastic gears are lighter and less noisy compared to steel gears, and they can be easily shaped into diverse forms by the injection molding process. For this reason, plastic gears are widely used in industry. An extensive amount of research has been conducted on gear materials and methods of shaping plastic gears for durability and for broader applications. In this article, the focus is on producing a plastic gear shaping method incorporating the injection molding process. The most important factor influencing the durability of a plastic gear is its accuracy. Unlike steel gears, the dimensions of plastic gears are subject to considerable change during formation, and this is due to certain conditions during the injection molding process and to the mold structure. The main causes of size variability here are the high viscosity of plastic and the shrinkage ratio of the resin. In our study, a supercritical fluid was used to reduce the viscosity of the plastic, and a pressurized mold was used to control the shrinkage ratio of the resin. Thus, production of an improved, more highly accurate plastic gear was achieved.
URI
https://www.tandfonline.com/doi/full/10.1080/03602550701278046https://repository.hanyang.ac.kr/handle/20.500.11754/106922
ISSN
0360-2559; 1525-6111
DOI
10.1080/03602550701278046
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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