| 摘要 |
<p>In many heat exchangers is used a system of a large number of glass tubes, which are endwise connected with opposed holder plates, and it is hereby a problem to achieve an easy mounting of the tubes and at the same time a sealed, but non-stiff connection between the tube ends and the holder plates. According to the invention an advantageous connection is achieved by producing the holder plates as moulded elements e.g. made of an artificial resin, with the use of a mould having a plurality of upstanding core stubs each provided with a seat groove for an O-ring . Prior to the moulding operation an O-ring is mounted on each of the stubs and by the moulding operation corresponding seat grooves will be formed in the moulded member. When the moulded member is rejected from the mould the O-rings will remain in the moulded seat grooves and thus be drawn off the stubs whereafter the moulded member is immediately usable for receiving tube ends through the moulded holes and their associated O-rings .</p> |
