| 摘要 |
An extruder for welding plastic components, of the type comprising a rear part (12), for feeding and segmenting a continuous plastic filament (13), and a front part (11), for plasticizing and ejecting plastic material to be deposited on the weld. The front part (11) comprises a first chamber (15) for moving the particles (16) of plastic material from the rear part (12) to a second chamber (17) for plasticizing and ejection, which ends with a first nozzle (18) suitable to eject the melted plastic material. The extruder further comprises a duct (33) for heating forced air, which is formed between the outer surface (34) of the external containment enclosure (14) and the walls of the first and second chambers (15, 17); the heating duct (33) ends with a second nozzle (35) for ejecting the heated air, which is arranged proximate to the first nozzle (18). The heated air that exits from the second nozzle (35) is useful for preheating the welding area. |
