Material behaviour in the screw

Although the material behaviour at the feed port can be observed, once the compound enters the screw channel, direct observation is not possible. The flow visualisation is accomplished for thermoplastics, by stopping the screw, cooling the machine and pushing out the screw with the material filling the channel. For a rubber compound the rotation 

Reprinted with permission from R. Brzoskowski, K. Kubota, K. Chung, J. L White, F. C Weissert, N. Nakajima and K. Min, International Polymer Processing Journal, 1987, 1, 3, 130. 

Reprinted with permission from K. Okubo, Journai of the Society of the Rubber industry, 

Reprinted with permission from Krupp. Copyright Krupp. 

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