Provided, according to the present invention, is a heat exchanger including: a pipe structure having an inlet and an outlet formed therein and providing a flow path which is extended between the inlet and the outlet and through which a refrigerant flows; and a heat dissipation structure coupled to the pipe structure to exchange heat between the refrigerant and an external fluid, wherein the heat dissipation structure is made of a composite material comprising a resin material and a carbon material.

In the proposed hydro ironing method, through an innovative arrangement of loads and using a novel configuration for the die components, the thickness reduction in one stage of ironing is almost equal to twice the common approaches.

A heat exchanger including a header having a plurality of header openings with rigid tubes that may be made of plastic are inserted in the openings. The tubes are sealed to the header to prevent leakage between the header and the tubes to prevent water and air leakage between the wet, scavenger air stream flowing through the tubes and a dry air stream flowing around the tubes. A method of making the heat exchanger includes providing the openings with a flange and uses an interference fit between the rigid heat exchange tubes and the header openings. A self-leveling sealant may be used to seal the heat exchanger tubes to the header using, for example, a paint roller and/or a paint sprayer.

Embodiments provide improved flaring and swaging bits, and methods for flaring and swaging.

Embodiments provide improved flaring and swaging bits, and methods for flaring and swaging.

A machine used in tube fabrication, wherein the machine imparts a locating feature near an end of a tube when the tube is located between a clamp die and a bend die of the machine by using a crimp die to form detents and bulges in the tube. The locating feature enables the tube to be located in a larger tube.