| 摘要 |
<p>A method and apparatus for forming an article from a sheet of PET material of thickness greater than 1 mm comprises heating the PET sheet (3) to a preforming temperature of approximately 110 DEG C by heaters (19) and (20), and then forming the sheet (3) onto a heated vacuum mould (6). The sheet is retained in the mould (6) by the vacuum and the surface (4) and (5) of the sheet (3) are maintained at a temperature of approximately 160 DEG C by the mould (6) and the heater (19), respectively, until the degree of crystallisation of the sheet is in the order of 35%. <IMAGE></p> |
