Tubular mould for manufacturing concrete pipes

摘要

The tubular mould for manufacturing concrete pipes, which consists of a mould casing and a mould core (1), comprises a vibrator (3) which preferably acts on the core and has a shaft (7) as well as, assigned to it at an axial spacing and driven by it, flyweights (26). Also provided is at least one hydraulically actuatable clamping device (9), via which the vibrations of the vibrator (3) can be transmitted to the mould. In order to guarantee perfect clamping in a constructionally particularly simple manner, each clamping device has according to the invention a pressure piece (19) which can be acted upon by at least one piston/cylinder unit (20, 21), the piston (20) of which consists of a plastic material which ensures a slight diameter increase under the effect of pressure. <IMAGE>