Hand welding extruder for heating surfaces to be welded comprises an annular channel arranged around a nozzle tube section and connected to a hot air guiding unit

摘要

Hand welding extruder comprises an annular channel (18) arranged around a nozzle tube section (12) and connected to a hot air guiding unit (3). The annular channel is closed by a sliding lid (15) in the direction of the welding shoe (5). The lid has a passage for the hot air. Preferred Features: The annular channel has a U-shaped profile and tapers on its outer side in the direction of the lid.