APPARATUS AND METHOD OF MANUFACTURING HOLLOW ARTICLES

摘要

The apparatus comprises a mandrel (12) and a hollow mould (34) having a first section (50, 52, 58, 60) and a second (36, 38). Internal surfaces of the mould (34) and external surfaces of the mandrel (12) bound an elongate space including a neck portion, a body portion and a shoulder portion which joins said neck and body portions. Surfaces of the first section (50, 52, 58, 60) of the mould (34) and of the mandrel (12) bound the neck and shoulder portions and surfaces of the second section (36, 38) of the mould and of the mandrel (12) bound a cylindrical gap forming the body portion of the space. Mouldable material is fed into the space along a bore (46). The sections can move relatively to one another between a first position in which they are spaced apart and a second position in which they abut. The first section of the mould comprises two thread plates (50, 52) which bound a bore (54) having a thread groove (56) in the cylindrical surface thereof and two mould halves (58, 60) which have surfaces that bound the shoulder portion.