| 摘要 |
The invention provides an arrangement for producing an extruded product, the material of the article being melted or plasticized and forced through an annular profiled die in order to produce an elongated hollow product. After running through the die, the hollow product is in this case subjected to a difference in pressure over the side walls while it is still soft and, as a result, the hollow product is stretched in the direction ... with respect to the direction of extrusion and calibrated, after which the product is cooled in its stretched form. |
