| 摘要 |
Process for the permanent fastening of the end or ends of at least one rod, consisting at least partially of thermoplastic material and having in each case at least one continuous cavity, in at least one opening of a supporting plate encompassing at least one rod. In this process, for its fastening, each rod is positioned in openings of the supporting plate provided for it, each rod cavity having a hydraulic diameter which corresponds to at least 10% of the smallest outer cross-sectional dimension of the rod, and the rod walls may have pores which make up at most 20% of the wall volume. The said process is intended in particular for producing heat exchangers and is characterised in that the rods with the supporting plate are positioned in such a way that the ends of the rods are arranged substantially vertically upwards and the supporting plate is arranged substantially horizontally, in that then heat is supplied from above to the rod ends to such an extent that the rod ends soften at least partially and the outer walls of the rod end expand in such a way that they come to bear against the walls of the supporting plate openings and are adhesively bonded or fused with the latter. <IMAGE> |
