Transfer moulding, or slush moulding, is a process in which molten resin is transferred from a meltpot into a mould which is hotter than the resin. This is unlike injection moulding where the mould is cooler. The higher temperature is important for filling long moulds in order to maintain a consistent wall thickness and to compensate for shrinkage. Once the mould has cooled and the plastic solidified, the item is removed and the next charge is loaded.