Abstract: The invention under consideration concerns a device for the production of corrugated pipes made of thermoplastic, in which mold jaws, which complement each other in pairs, are conducted jointly in a cycle along a mold section that leads away from an extruder head; they are moved apart at the end of the mold section and are returned to its beginning separately from one another with a mold section device for the movement of the mold jaws along the mold section, which has a supporting table with drive means for the mold jaws on the mold section, and with a return conveying device for the return conveyance of the mold jaws from the end of the mold section to its beginning, which has an outlet assembly to move apart the mold jaws at the end of the mold section and/or an inlet assembly to move in the mold jaws at the beginning of the mold section.

Abstract: The invention relates to a method for producing a molded plastic part, including the steps of: spraying a quasi-endless plastic tube with an annular gap of a spray head; shaping and at least partially cooling the plastic tube with a molding line connecting to the spray head. In particular, the molding line includes a number of recirculation molding jaws, the molded plastic part is configured as a repeat unit of the plastic tube shaped by the molding jaws.

Abstract: A device for applying plastic onto a workpiece, consisting of a supply area to insert flowing plastic, a distribution area which follows the supply area in the flow direction of the plastic, and a nozzle area which follows the distribution area, wherein a circular opening in the device is surrounded by an annular outlet in the nozzle region, and a workpiece that is arranged within the opening is moveable in an axial direction with respect to the outlet and can be covered with plastic over its entire circumference. A device for the application of plastic is provided herein, which makes possible a uniform application over the entire circumference, even for large workpieces.

Abstract: The invention under consideration concerns a device for the production of corrugated pipes made of thermoplastic, in which mold jaws, which complement each other in pairs, are conducted jointly in a cycle along a mold section that leads away from an extruder head; they are moved apart at the end of the mold section and are returned to its beginning separately from one another with a mold section device for the movement of the mold jaws along the mold section, which has a supporting table with drive means for the mold jaws on the mold section, and with a return conveying device for the return conveyance of the mold jaws from the end of the mold section to its beginning, which has an outlet assembly to move apart the mold jaws at the end of the mold section and/or an inlet assembly to move in the mold jaws at the beginning of the mold section.

Abstract: The present disclosure relates to a corrugated pipe made of thermoplastic plastic, which includes an inner pipe and a corrugated outer pipe connected thereto, wherein the profile of the outer pipe includes first sections with a first average diameter, second sections with a second average diameter greater than the first average diameter, and, disposed therebetween, flanks that connect the first sections to the respective adjacent second sections. The geometric relationships of the corrugated pipe are designed to yield not only high rigidity against pressure forces acting on the corrugated pipe in the radial direction and high flexibility with regard to bending of the corrugated pipe transversely to its longitudinal axis, but also, at the same time, a low weight in comparison to conventional corrugated pipes. This reduces the consumption of plastic during production and makes the corrugated pipe easier to handle when it is being laid.

Abstract: The disclosure pertains to an apparatus to shape the interior surface of a pipe made of thermoplastic material, where the apparatus includes a shaping component. the surface of this shaping component can have at least one notch and at least one smooth continuous surface area. The shaping component can have at least partially a cylindrical shape and/or at least partially a conical shape. The notch or notches can run spirally or closed and can either extend over the entire length of the shaping component or can only be located along a specific length of the shaping component. The notch or notches can be connected to a pressure system to produce vacuum and/or positive pressure in the notch. This can facilitate enhanced feeding and gliding of the interior surface of the pipe at the shaping component. The disclosure also pertains to a system to manufacture pipes made of thermoplastic material, where the system includes an above apparatus to shape the interior surface of a pipe made of thermoplastic material.