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Repairing a Plastic Basin with Hot Air Welding

In the video, a craftsman is repairing a cracked plastic basin using a traditional welding technique. This method is called hot air plastic welding. The setup involves a manual foot-operated air blower, which is the black bellows you see. The worker steps on the blower repeatedly to create a steady stream of air. This air travels through a tube into a small, heated metal chamber. Inside this chamber, the air is warmed to a high temperature. The hot air then flows out through a metal nozzle, similar to a welding torch. The welder holds a plastic welding rod against the broken edge of the basin. He simultaneously applies the stream of hot air to both the rod and the basin's cracked area. The heat melts the plastic from the rod and the surface of the basin. As the materials become soft and molten, he fuses them together. The plastic rod acts as a binder, filling the crack and bonding with the basin. After it cools down, the repaired area becomes solid and strong. This skillful, low-cost repair method extends the life of everyday items. It demonstrates a practical approach to sustainability by fixing rather than discarding objects.