| 摘要 |
A process for the production of an injection nozzle comprising an essentially tubular inner part (16) and at least one essentially wire-type heating element (14, 15) which is embedded entirely inside a solid metal body (12, 13) lying in a close-fitting manner around the inner part in which one or more separate, essentially tubular metal bodies (12, 13) with a heating element (14, 15) embedded therein are formed by placing the heating element and said metal in a molten state in a mould, so that the heating element is completely enclosed by the molten metal, and subsequently allowing the metal to set, following which the body thus formed is removed from the mould and this tubular body or these tubular bodies thus obtained is or are then slid over the tubular inner part up to a certain point. Advantageously a fully open axially running slit (12', 13') is formed in the wall of the tubular body (12, 13), while the wire-type heating element (14, 15) extends in curved loops running zigzag through the body and extending to the slit. <IMAGE> |
