| 摘要 |
<p>A heat exchanger has a plastics header tank shell (12) and a metal tube plate (14) which receives a plurality of tubes (13). The tank shell (12) is attached to the tube plate (14) by way of a plastics bead (17), which is moulded around the edge of the tube plate (14) prior to attachment of the shell (12) by means of ultrasonic welding. Different methods of attachment of the shell (12) to the bead (17) are possible, for example by an adhesive, and the edge of the tube plate (14) may be treated in a number of ways to increase the bond between the bead (17) and the tube plate (14), for example by means of an inwardly directed flange (16) around the tube plate edge.</p> |
