Patent ID: 7246436
Filing Date: 2007-07-24
Classification: B21D,F28D,F28F,Y10S,Y10T

Abstract:
1. A method for manufacturing a plate package for a plate heat exchanger, said package comprising a plurality of heat exchanger plates, which are stacked on each other and which each includes a number of portholes, wherein the plates are compression molded in such a manner that the plates in the plate package between each other form a first passage for a first fluid and a second passage for a second fluid and wherein the plate package is designed to permit at least one of said fluids to flow through the respective passages at a predetermined working pressure, comprising: attaching the plates to each other in a number of joints in such a manner that a permanent joining of the plate package is achieved, and providing at least one local inner plastic deformation of the permanently attached plate package in such a manner that the plate package obtains an increased strength.