Experimental Study of the Flow Characteristics of Rubber Compounds in Extruder Screws
| Autor: | Ryszard Brzoskowski, James L. White, Kyonsuku Min, Nobuyuki Nakajima, Frederick C. Weissert |
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| Rok vydání: | 1986 |
| Předmět: | |
| Zdroj: | Rubber Chemistry and Technology. 59:634-650 |
| ISSN: | 1943-4804 0035-9475 |
| DOI: | 10.5254/1.3538225 |
| Popis: | The application of screw extrusion to rubber compounds probably dates back over a century. Rubber extrusion has been an area of industrial importance throughout this period. Technological innovation continues in this area, as may be seen in a recent review by Johnson. However, there have been only a few basic studies on the flow characteristics of rubber screw extruders. Many more extensive investigations on the working of plastics screw extruders have been carried out. The latter researches are summarized in the volumes by Tadmor and Klein and Tadmor and Gogos. The basic mechanisms of flow of plastics in screw extruders were first revealed in experimental studies by Maddock. He fed the screw with pigmented pellets, pulled it from the barrel with the plastic strips in it, which were then unwound and cross-sectioned. There seem to be few such similar published investigations for rubber compounds. We are only familiar with the work of Menges and Lehnen. It is our purpose in the present paper to initiate a fundamental study of flow mechanisms in rubber screw extruders. We will proceed by carrying out the Maddock procedure but with rubber strips containing markers, then vulcanize the rubber compounds in place, and pull out the screws. The placement of the rubber will be noted, and the rubber sections will be examined for their flow patterns. The paper extends our earlier marker experiments on flow of rubber compounds through dies. |
| Databáze: | OpenAIRE |
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