Plant for the production of tubular or hose-like articles of synthetic material

Claim 1

A mobile unit for the continuous production of plastic tubes, particularly corrugated tubes for draining purposes, comprising: an elongated, wheeled, vehicular platform (10) having an enclosure (11) mounted thereon and enclosing same; an extruder (18) for plastic material mounted on said platform; a molding device (20) mounted on said platform, said molding device including a pair of rotatable loops (24, 25) of chainlike connected dies (53) abuttable along a common rectilinear portion located at the output of said extruder; mold cooling means including cooling passages (55-58) in said dies having inlets and outlets (59, 60), a pair of loops of flexible cooling lines (61,62), one of said cooling lines being connected to said inlets and the other of said cooling lines being coupled to said outlets of said cooling passages, said pair of loops of cooling lines being rotatable with said loops of dies, and swivelable coupling means operatively associated with said rotatable cooling lines (65) for connecting said rotatable cooling lines to a stationary source of coolant (50); a punching device (21) mounted on said platform at the output of said molding device for applying apertures to the extruded and molded tube; and power supply means (15) energizing said extruder, said molding device, said mold cooling means, and said punching device.