| 摘要 |
The invention describes a process for cooling and if necessary calibrating elongated, especially continuously extruded objects (7) made of plastic as well as a cooling and calibrating device (5) for carrying out the process. With this the object (7) during its advancement in the longitudinal direction is exposed in consecutive regions (13 to 18; 86 to 89, 95 to 97) to a higher vacuum in each case and is cooled with respect to the initial temperature to a lower final temperature. The heat to be removed for cooling is extracted by a coolant washing round the object (7). The individual regions (13 to 18; 86 to 89, 95 to 97) in the transport direction of the object (7) are separated from each other from the covering plate (35) or the base plate (43) to the height of the object (7), whereupon by means of the vacuum a coolant on one longitudinal side of the section is drawn into a chamber of the region and is raised over the upper edge of the object (7) or a support diaphragm (81) extending transversely to the longitudinal direction from the base plate (43) to approximately the height of the object (7). The coolant overflows into a flush chamber (46; 102,107) located on the opposite longitudinal side of this region (13 to 18; 86 to 89, 95 to 97) or of the object (7) or of the support diaphragm (81) through an immediately following region (13 to 18; 86 to 89, 95 to 97) in the extrusion direction and is thereafter drawn into the tank (22) or into this following region (13 to 18; 86 to 89, 95 to 97). |
