A rotational molding system for molding a polymer shell for a medical article, comprises: a multi-axis rotational molding machine (50) a mold (100) mounted to rotate about at least two axes within the molding machine wherein the interior of the mold defines a cavity (11,21) in the desired shape of the medical article to be molded and a mold liner coating the mold cavity and having a seamless inner surface, the mold liner being formed by introduction of a liner material within the mold and operation of the molding machine to uniformly coat the cavity. A polymer shell for a medical article may be molded within the inner surface of the mold liner so as to have a seamless external molded surface defined by the mold liner inner surface.
