FORFARANDE FOR TILLVERKNING AV ROR I PLATVERMEVEXLARE

摘要

In the manufacture of tubular heat exchange panels by screen bonding two panels in face-to-face contact, forming an opening in the edge of the composite panel and injecting a fluid expansion medium to form a tubular expansion pattern between the panels according to a desired pattern, the bond line between the panels at the desired location of the inflation opening is located by hammering and preferably peening the edge of the composite panel so as to form an initial split along the bond line at the desired point of entry. Hammering apparatus for carrying out the method is disclosed comprising a reciprocating and pivoting cylindrical hammer head.