B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 53/60 (2006.01) B29C 53/82 (2006.01) B29C 47/00 (2006.01)
Patent
CA 2354405
An apparatus is disclosed for making a conduit or pipe. An extruder (12) is provided for producing a strip (14) of continuous thermoplastic. A winding drum (10) receives the strip and helically winds the strip around the drum's perimeter to form a conduit having an inner diameter corresponding to the outer diameter of the drum. The drum (10) includes a core tube (36) surrounded by a plurality of rollers (20) which define the outer diameter of the drum. The rollers (20) rotate to advance the strip around the drum. A plurality of support columns (24) are used to support the roller (20) at each end. A hub assembly (16) is used to movably support the support columns in slidable engagement. The support columns (24) are radially displaced by the hub assembly between two positions, in order to vary the outer diameter of the drum (10) between two diameters.
Cet appareil de fabrication de conduits ou de tuyaux comporte une extrudeuse (12) produisant une bande (14) continue de thermoplastique. Un tambour d'enroulement (10) reçoit la bande qu'il enroule en spirale sur tambour de façon à former un conduit dont le diamètre intérieur correspond au diamètre extérieur du tambour. Le tambour (10) est constitué d'un tube moyeu (36) entouré d'une pluralité de rouleaux (20) définissant le diamètre extérieur du tambour. La rotation de ces rouleaux (20) fait progresser la bande autour du tambour. Chaque rouleau (20) est maintenu en ses deux extrémités par un rayon support (24). Un ensemble moyeu (16) maintient avec mobilité les rayons en contact coulissant. Ces rayons support (24) sont mobiles radialement entre deux positions sous l'action de l'ensemble moyeu de façon à faire varier le diamètre du tambour (10) entre deux diamètres.
Fetherstonhaugh & Co.
The Lamson & Sessions Co.
LandOfFree
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