FIELD: molding.
SUBSTANCE: pulsating corrugator is proposed that contains at least one auxiliary molding unit, which is selectively used for molding a bell connection, when molding a corrugated or ribbed pipe. Main molding units used for forming a corrugated pipe are preferably used for additional cooling of the formed bell connection after its uncoupling from the auxiliary molding unit. The corrugator also contains a controller used for providing different air pressure, when molding units pass by outlet extrusion holes of a corresponding extruder.
EFFECT: invention provides for corresponding pressure to maintain extruded molded plastic during the movement of molding units.
5 cl, 13 dwg
