| 摘要 |
For calibration and stabilisation of the discharge product from extruders it is known to use tubular calibration units both for calibration of the product diameter and for cooling of the product for initial stabilisation of the product, whereby the calibration pipe should have a noticeable length. For a current exact calibration it may be desirable to effect small changes of the calibration diameter, yet with associated problems in exchanging the calibration pipe. The invention provides for a calibration pipe (14) with adjustable diameter, viz. in that the pipe is made of a number of split rings (16), which are juxtaposed with random locations of the splits (18), such that the pipe when seen in its axial direction is entirely unbroken. The rings (16) may be collectively radially compressed in a controlled manner by means of axially extending wedge clamp rods (24, 26) for a uniform adjustment of the diameter of the pipe (14) as a whole. |
