Patent ID: 6554929
Filing Date: 2003-04-29
Classification: B01D,B29C,B29L,F28F

Abstract:
A method for joining tube headers of a plastic heat exchanger, comprising the steps of:forming fins made of a plastic material on respective outer peripheral surfaces of refrigerant tubes made of a plastic material and arranged in a laminated fashion while allowing each of fins to connect to corresponding refrigerant tubes, thereby forming a fin-tube assembly having a plurality of fin-tube units each consisting of one refrigerant tube and one fin; forming tube headers made of a plastic material at opposite ends of each of the fin-tube units in accordance with a double injection molding process, respectively; arranging a thermal fusing jig to support the bottoms of the tube headers at each end of the fin-tube assembly; and pressing thermal fusing molding dies of a thermal fusing machine against the fin-tube units at each end of the fin-tube assembly, thereby thermally fusing the tube headers to the fin-tube units, so that the tube headers are integral with the fin-tube units, respectively.