| 摘要 |
An injection moulding assembly produces plastic preforms and has an adapter with numerous nipples (30), with radially expanding press/sealing rings (56) that are inserted into the sleeve-shaped components. When inactive, the sleeves float slightly. Assembly is an auxiliary robotic device for finishing and calibrating preforms (10) on removal from a multiple tool in an unstable shape, the calibration process being performed with the aid of compressed air immediately after removing and withdrawing the preforms (10) from the multiple tool. Nipples inserted into the preforms (30) have expandable press/sealing rings (56) sealing the interior of the preform (10) blow-moulded section. Compressed air enters via nipples (30). The seal is effected by radial expansion of the rings (56), preventing distortion of the preforms (10). The blow-moulded part (43) interior section is sealed without detriment to strength and shape. Areas not supported by the cooling sleeves are pre-externally strengthened by cool air as the preforms are transferred to the moving sleeves or cooling sleeves. Further claimed is a commensurate operating process to cool preforms consisting of a threaded section, a neck section and a blown section. During the calibration process press rings or sealing rings are accurately applied to the nipples and inserted into the preform in the zone between the threaded section and blown section, and inflated until contact is established. A resulting inner radial force causes the blown section to be sealed externally against the form. |
