| 摘要 |
An apparatus for the manufacture of compound pipes with an oval cross--section is equipped with mould halves which advance in a direction of pro-duction and of which two at a time combine as a pair on a moulding path to form one mould. An injection head of at least one extruder is arranged up--stream of the moulding path. An external nozzle used for the creation of an external tube is substantially circular in shape and is located at a distanc e upstream of the moulding path. An internal nozzle with a cross-section similar to the oval cross-section of the pipe to be created is located insid e the moulding path. When entering the moulding path, the external tube ex-truded through the external nozzle is expanded in one direction and press ed together in a direction which is perpendicular to the former. |
