an apparatus and process is disclosed for rotational molding . rotational molding is a technique for the fabrication of parts from powdered thermoplastic material in which the thermoplastic material is placed within a hollow mold and the mold is rotated in a heated environment until the thermoplastic material fuses and coats the entire interior surface of the mold . included in the apparatus is a holding mechanism for the mold and a power mechanism to provide the required rotational motion to the mold . the power mechanism provides for simultaneous rotation of the mold about two orthogonal axes and is displaced spatially from the holding mechanism . the holding mechanism is attached to a translating mechanism which positions the molds both internal to and external to a heating chamber such as an oven while keeping the drive mechanism external of the oven at all times . more specifically there is disclosed an apparatus which includes a truck mounted upon a guiding track and having extending therefrom an arm mechanism . the arm is pivotally attached to the truck and is coupled thereto in such a manner that the arm may be translated about the pivotal point through a vertical path from a horizontal position at a loading / unloading station through approximately 180 ° to be positioned into a heating chamber at a heating station and a cooling chamber or tower at a cooling station for fabrication of the molded part . subsequently , thereto the mold attached to the arm may be repositioned at the mold rework station for the removal of the plastic part from the mold . automatic control mechanisms and interlocks are provided to enable safety measures to be exercised to prevent movement of the truck along the track except at specified times and when the arm is in appropriate position to clear the oven and cooling towers .