Collecting box for e.g. radiator, of motor vehicle, has sealing joint forming bi-material layer such that joint occupies approximately fifty percentage of space between protruding ends of tubes and collecting plate

摘要

The box has a collecting plate (7) for fixing a set of tubes (2), where a fluid e.g. cooling liquid, circulates inside the tubes. A lid closes a portion of the box during the fixation of the lid with the plate. A sealing unit is situated between the plate and the lid and includes a sealing joint (8) forming a bi-material layer such that the joint occupies approximately 50 percentage of a space (10) between protruding ends of the tubes and the plate. Section of the ends of the tubes is expanded so as to constitute a retaining unit of the joint.