Permanent magnet rotor for wet-running pump, has coating made of thermoplastic material and provide

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The invention relates to a permanent magnet rotor (1) for a Wet rotor motorpump, consisting of a hollow-cylindrical rare earth magnet (2) and a covering (3) of a thermoplastic plastic material, wherein the coating (3) the rare earth magnet (2) includes completely waterproof. The object of the invention is to make a permanent magnet rotor so that a rare earth magnet contained therein and thus is protected against corrosion comes extrusion-coated, here the permeation coefficient over a temperature range of -40 °C to + 90 °C is to of the encapsulation An of at least 15 years be low and via a and the strength of the encapsulation must be sufficient, so that the necessary torque transmission to a pump member reliable in operation can be guaranteed. This problem is solved according to the invention by the characterising feature of claim.