Profile: Crossfield Excalibur Ltd specializes in offering sheet steel and stainless steel toolmaking services. We also offer a range of standard tools for pallets, water tanks, traffic cones and separators. Rotational molding is a process whereby a hollow mold is filled with a powder resin and then rotated bi-axially in an oven until the resin coats the inside of the mould and cures. The mold is then cooled and the part removed.