| 摘要 |
The present invention relates to an inner mould 5 for manufacture of a corrugated or wave-shaped hose by means of pressurised air. The mould 5 consists of a tube 7 which is closed at its ends and onto which rings 6 are fastened very slightly loose by means of conical pins, such that the air 10 trapped between the hose blank 4a and the rings 6 may escape during the proceeding of the work between the ring and the tube as well as through the holes 9 of the tube into the tube. <IMAGE> |
