Compression head of a manufacturing machine for reinforced concrete pipes

摘要

A compression head of a manufacturing machine for reinforced concrete pipes has a smoothing cylinder (2) which is mounted in a rotationally fixed manner on the drive shaft (1) of said head and is intended for smoothing the inside of the concrete mixture poured into a vertical mould. On a top wall (3) of the smoothing cylinder (2) rollers (5a to 5d) for the radial compression of the concrete mixture are mounted rotatably axially parallel with respect to the drive shaft (1) and together with the latter can be driven at a predetermined speed of revolution around the axis of the drive shaft (1), the direction of rotation of the rollers being counter to that of the top wall (3). In order to prevent the concrete from being pushed in front of the rollers during the compression, but rather being compressed outwards in the radial direction in a shear-free manner, so that the steel wires of the reinforcing cage are completely covered by the concrete and between the cage and concrete stresses with corresponding cracks in the interior of the concrete do not occur, it is ensured that the top wall (3) of the smoothing cylinder (2) is mounted separately on the drive shaft (1) such that it can be rotated relative to the latter and the rollers (5a to 5d) are connected in terms of drive to the drive shaft (1) via a gear mechanism (10), the transmission ratio of which is selected such that the peripheral speed of the rollers (5a-5d) is at least equal to their speed of revolution. <IMAGE>