Grundfos Management A/s

Morten Holst Bogh

Martin Vad

A method for injection molding a pump impeller () of plastic, with which the cores which define the flow channels () in the inside of the impeller (), are formed in each case of at least two core parts (). After the injection molding, a first core part () is firstly pulled out of the flow channel () and subsequently, an additional relative movement between the impeller () and the core part () is effected in a direction transverse to the pulling direction of the second core part (), before or during the pulling-out of a second core part ().

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Hobro, Denmark

Morten Holst Bogh