| 摘要 |
The electric cartridge type heater is provided with a continuous central fitting hole (2) for receiving a cylindrical body to be heated, especially a plastic injection molding nozzle, in a gap- free manner, as well as with an inner metal jacket (1) and an outer metal jacket (3) and with at least one heating conductor, which is wound as a heating wire winding (9) on the circumference of a hollow cylindrical coil form (8), which is inserted in an annular chamb er (4) located between the inner metal jacket (1) and the outer metal jacket (3) and closed on the front side and is surrounded by an insulating compound. The coil form consists of a ceramic ma ss or a metal oxide. Its cylinder wall has axially parallel holes (10) or ducts (11/1) for receiving the ends (12, 13, 15, 16) of the heating wire winding (9) and optionally the electric connecting conductors (18, 19) connected to the ends (12, 13, 15, 16) of the heating wire winding (9), wherein all parts are compacted by radial pressing. The connecting conductors (18, 19) connected t o the ends (12, 13, 15, 16) of the at least one heating wire winding (9) and/or the ends of the at least one heating wire winding (9) are led radially to the outside through an opening (20, 20/1) of the outer metal jacket (3) in an axial area which is located away from the two axial ends of the annular chamber (4) and is located between two heating wire windings (9/1, 9/2) or two winding sections (9a, 9b) of the same heating wire winding (9).
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