Abstract: A method and apparatus for production of smooth or corrugated small and large diameter thermoplastic tubing and composite tubular structures. The apparatus includes a supporting framework, a plurality of mold carriages mounted on said framework for reciprocal linear travel therealong, at least one mold block mounted on each of said mold carriages, each said mold block comprising a pair of opposed semi-cylindrical segments mounted on a carriage for transverse linear reciprocal travel therealong for closing and opening of said mold block, an actuating mechanism for moving said opposed mold segments towards and away from each other, and a single actuating mechanism for selectively moving said carriages.