Mixing Paddles

The different models of paddles mainly result from the intended mode of action in the materials to be mixed. Depending on the mineral and chemical components of the materials to be mixed and the resulting viscosity of these, it is necessary to use the appropriate paddle geometry so that complete mixing is achieved as quickly as possible.

The most commonly used mixing action is from bottom to top (typesWKand MK). It is ideal for mortars, plasters or concrete with heavy aggregates such as sand or gravel. Due to their clockwise rotation, the mixing paddles work their way into the mixture like a screw, pushing the heavy components upwards. This also reduces the amount of force required for mixing.

When mixing downwards, the mixing blades press the material downwards from above. This mixing action is preferred for low-viscosity or very soft materials such as self-leveling compounds, paints, coatings, gypsum plaster, etc., to avoid splashing of the medium (i.e. LX or DLX). When mixing materials with a higher density, with these paddles, a higher amount of force must be taken into account.

This mixing effect describes a lateral material movement, as the design of the paddle has no parts pointing upwards or downwards.  Thus, the inconspicuous geometry of the KR paddle counteracts the formation of lumps frontally due to its very high shear forces and ensures rapid homogenization. This makes it the ideal candidate for mixing thinset mortar for tiling.

Two counter-rotating paddles create a so-called forced mixing action (MKD-paddles). The material is forced to pass through the mixing zone of the two paddles. This results in rapid and intensive mixing of the material. This mixing principle is particularly suitable for materials that are difficult to mix (e.g. concrete screed, synthetic resin-based materials, etc.). At the same time, the torques of the two paddles cancel each other out in relation to the machine, which makes mixing much easier for the operator.