Friction bearing technology for melt metering pumps explained

Bearings are one of the core components of melt metering pumps. Materials and designs must be carefully selected and coordinated to ensure the safe and efficient operation of the metering melt gear pump.

Typically friction bearings are used in melt pump for extrusion. For this type of bearing, the inner diameter is slightly larger than the journal in which it is stored. The conveyed medium penetrates into this small area through a lubrication groove, through which the medium in the bearing forms a hydrodynamic lubrication film. The shaft "floats" in the bearing. In the case of friction bearings with media lubrication, it must be ensured that the lubrication film does not tear. Otherwise, the shaft cannot be relubricated and damage to the shaft and bearing occurs. This damage is usually irreparable and results in the need to replace the bearing and shaft.

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