Abstract: In a mixing apparatus with a mixing rotor (17) and a mixing chamber (20) with exit openings (29), the rotor and chamber are relatively movable from a mixing position (FIG. 5), in which there is a clearance (43) between the rotor and the wall of the chamber, to a dispensing position (FIG. 6), in which there is no or substantially no clearance. In the mixing position the material (40,41) being mixed circulates (44) within the mixing chamber, and in the dispensing position the rotor (17), being adapted to urge the mixed material (45) towards the exit openings (29), pumps the mixed material out through the exit openings (29) in the form of pasty strands (46) or the like.