Basf Aktiengesellschaft

Basf Se Corporation

Huanmin Wei

Oskar Stephan

Annemarie Hillebrecht

Uwe Stueven

Wilfried Heide

Dominicus Van Esbroeck

Leo Van Miert

Asif Karim

The invention relates to a method for monitoring the bending of a shaft, particularly a shaft in a mixing kneader, the shaft having a bearing at least on one side. In a first step, the deviation of the shaft from the radial position is measured on at least one position different from the bearing of the shaft. In a further step, a reference value is optionally determined from the measured deviation from the radial position. In a third step, the deviation from the radial position as measured in the first step or the reference value found in the second step is compared with a predetermined limit value.

Method for avoiding overloading of a shaft

The invention relates to a mixing kneader comprising at least two shafts () configured as hollow shafts, on whose surfaces kneading bars () are disposed on elements (). The construction of the shafts is selected in such a way that the resonant frequencies of the shafts have a separation of at least 5% from the excitation frequencies. At least one of the shafts is preferably flowed through by a temperature-control medium, the inlet being disposed on one side and the outlet on the other side of the shaft. The mixing kneader preferably comprises at least one orifice above the shafts which is configured as a dome, the dome being closed by a displacer (). In addition, at least one orifice for product withdrawal is provided, whose orifice cross section is adjustable during operation.

Mixing kneader and process for preparing poly(meth)acrylates using the mixing kneader

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Frankenthal, Germany

Huanmin Wei