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Volume 88, Issue 4
Displaying 1-9 of 9 articles from this issue
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Special Issue for General Reviews “Thermal Problem of Rubber Processing”
Introductory Remarks
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[in Japanese]2015 Volume 88 Issue 4 Pages 111
Published: 2015
Released on J-STAGE: June 17, 2015
JOURNAL FREE ACCESSDownload PDF (132K)
General Reviews
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[in Japanese]2015 Volume 88 Issue 4 Pages 112
Published: 2015
Released on J-STAGE: June 17, 2015
JOURNAL FREE ACCESSDownload PDF (131K) -
Takashi MORIBE2015 Volume 88 Issue 4 Pages 113-117
Published: 2015
Released on J-STAGE: June 17, 2015
JOURNAL FREE ACCESSInternal mixers have been widely used as rubber mixing equipments for more than a century. The optimization for rubber mixing in internal mixers should be required to improve the compound properties and productivity. Then the mixing process requires high energy input, and at the same time such mixing causes an increase in rubber temperature due to the heat generated by shearing force. Therefore heat transfer characteristics in internal mixers are important for the prevention of material deterioration. The paper describes various studies on the heat transfer characteristics between internal mixers and rubber compounds. Comparison between tangential and intermeshing rotor systems is also reported. The advantage of intermeshing system is higher mixing and cooling performance in terms of heat transfer characteristics.View full abstractDownload PDF (1052K) -
Kosuke HIGASHI, Koichi MIYAKE, Kazuhisa FUKUTANI, Yasuaki YAMANE2015 Volume 88 Issue 4 Pages 118-121
Published: 2015
Released on J-STAGE: June 17, 2015
JOURNAL FREE ACCESSIt has become important to consider global environmental issue. In order to reduce fuel consumption of automobiles, development of low rolling resistance tires has been promoted. They are mostly made of rubber compound filled with silica. Rubber temperature control in mixer has become more important, because silica mixing, with silane coupling reaction, needs to be under constant temperature for better mixing quality. Mixer temperature is controlled by water cooling of chambers and rotors. There have been some qualitative approaches about mixer cooling. However, quantitative prediction of rotor cooling would be still little. Heat conduction analysis of rotor, under steady and unsteady condition, had been carried out to investigate rotor cooling of internal type mixer. The results of unsteady analysis were mostly accorded with experimental results, and heat release rates from rotors in operating conditions were predicted by steady analysis. In the future, this analysis could be applied for design of different shape rotor or scale up of mixer and be coupled with flow analysis in mixers or structural analysis of rotors.View full abstractDownload PDF (906K) -
Tatsuo YADA2015 Volume 88 Issue 4 Pages 122-129
Published: 2015
Released on J-STAGE: June 17, 2015
JOURNAL FREE ACCESSDuring rubber mixing process, a thermo sensor equipped with such as a thermocouple provides one of the most important monitoring factors, i.e. the temperature of rubber compound in the invisible inside of a mixer. However, it is recognized that the performance of this sensor is not good enough to satisfy the monitoring requirement.
This paper tries to make clear the reason from the viewpoint of the sensor response time and the friction heat generation between the sensor and rubber compound.
A high response thermo sensor is useful to visualize the rubber compound behavior in a mixer, and will be a prospective tool to control mixing process more optimally.View full abstractDownload PDF (1172K) -
Hiroyuki ONTSUKA, Michiharu TOH2015 Volume 88 Issue 4 Pages 130-135
Published: 2015
Released on J-STAGE: June 17, 2015
JOURNAL FREE ACCESSThe mixing of unvulcanized compounds and vulcanizing agents is performed on two roll mills at present. It was known that the mixing between the rubber and ingredients is conducted only at the nip on the two roll mill. So the size and temperature of bank at the nip, and the clearance of nip are very important.
It was found that when the roll temperature was varied, four regions of mill behavior were observed. In region 1 the highly elastic rubber will scarcely move into the mil nip at room temperature. In region 2 a good elastic rubber band is obtained on one of rolls. In region 3 the elastomer crumbles and bagging or crumbs occur. In region 4 a melt fluid coats on one of rolls at high roll temperature.
In this paper, mill behavior of rubber on two roll mills with the variation of temperature was expressed.View full abstractDownload PDF (1843K) -
Hitoshi NISHIZAWA2015 Volume 88 Issue 4 Pages 136-143
Published: 2015
Released on J-STAGE: June 17, 2015
JOURNAL FREE ACCESSHeat control technology are most important in rubber extruding and injection production process to produce high quality rubber products.
In this report, I would like to describe the relation between the heating control and rubber flow behaviors in screw and introduce the problems occurred in these practical production process.View full abstractDownload PDF (1761K) -
Keiji KAMIJIMA2015 Volume 88 Issue 4 Pages 144-150
Published: 2015
Released on J-STAGE: June 17, 2015
JOURNAL FREE ACCESSA problem is efficiency of heat transfer through the mold, and speedup of rubber-compounds heating, and high-temperature vulcanization.
Efficiency of heat transfer is a means of focusing on the target heating, uniform heat distribution, heat insulation, and high-speed heat transfer.
As for the rubber-compounds heating, it is thought a method to make the shear fever with the injection nozzle more effectively.
About the high-temperature vulcanization, an application of the mold heating means that does not produce a trouble in the flow of rubber-compounds is required.View full abstractDownload PDF (2455K)
Technical Note
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2015 Volume 88 Issue 4 Pages Annc04_143
Published: 2015
Released on J-STAGE: June 17, 2015
JOURNAL RESTRICTED ACCESSDownload PDF (469K)
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