A method of moulding plastics.

摘要

A method of moulding plastics by rotary moulding in which the plastics is subjected to a pressure differential, preferably by introducing gas under pressure to the mould cavity during its rotation. The pressure differential being applied no earlier than a stage at which all of the plastics has melted in the cavity and no later than the stage at which the plastics commences to solidify during cooling of the mould. Said pressure differential being maintained at least until all of the plastics in the cavity has solidified to the moulded product. <IMAGE>