Abstract: This invention relates to a method of and apparatus for moulding from an expandable plastics material such as expandable polystyrene beads, an elongate article which has a length greater than the length of the mould. The method includes the steps of introducing the unexpanded plastic material into a mould, expanding the material in such a manner that the material at one end of the article is not fully expanded, moving the article along the mould partially through an opening in its end, introducing fresh material into the mould to be in contact with the partially expanded material at one end of the article and fully expanding and bonding the fresh and partially expanded material in the contact zone between the two.