English Abstract
Effect of Diameter of Rotor Shaft on Heat Removal Characteristics of Factory Kneader
Makoto IRIE
Hiroyuki FUKUDA
Moriyama Company Ltd., Sanda City, Japan
Michiharu TOH
Department of Biochemistry and Applied Chemistry, Kurume National College of Technology, Kurume City, Japan
Makoto IRIE
Mutsuhisa FURUKAWA
Graduate School of Science and Technology, Nagasaki University, Nagasaki, Japan
Nippon Gomu Kyokaishi,(2006),79(7),354-358 Original Paper in Japanese

In order to obtain good mixing and to scale up internal mixers in rubber processing, heat removal from internal mixers is very important.
Also, currently it is very significant to control the temperature of rubber compound in internal mixers when rubber was mixed with silica using silane coupling agent.
There are some reports about heat removal and overall heat transfer coefficient of mixing vessel in mixers
under 7 L, but there is no report about those of factory mixers over 7 L. Moreover there is no paper relating to heat transfer to the surfaces of rotors and pressured lid.
In this paper, a novel factory kneader of 55 L equipped with a rotor having a large shaft in comparison with a conventional factory kneader of 75 L was used. Heat removal from the surfaces of vessel wall including both sidewalls, of rotors and of pressured lid for 55 L and 75 L kneaders was measured. Overall heat transfer coefficient of these surfaces for these factory kneaders was obtained. It was found that the heat removal characteristics of the novel kneader were better and more stable than those of the conventional kneader from start to finish of mixing.

(Received on November 14, 2005)
(Accepted on April 5, 2006)

Heat removal, Overall heat transfer coefficient, SBR compounds, Annulus, Low shear region