Abstract: Disclosed is a heat exchanger (100), comprising a heat exchange tube (10), fins (20) and rings (30), wherein the fin (20) comprises a tubular part (21), and the ring (30) is used for fastening the tubular part (21) onto the heat exchange tube (10). A pressure is exerted in an axial direction of the heat exchange tube (10) on the tubular parts (21) of fins (20) and the rings (30) which are alternately sheathed onto the heat exchange tube (10), so as to fit the tubular part (21) together with the ring (30) in such a way that one is sheathed onto the other, thereby fixing the tubular parts (21) of the fins (20) onto the heat exchange tube (10). When the diameter of the heat exchange tube is relatively small, the tube expansion technique cannot be used for the connection of the heat exchange tube and the fins, and the heat exchanger (100) can avoid the complicated soldering process, thereby improving the product quality, and reducing the manufacturing costs of the product and the equipment investment.

Abstract: An apparatus is provided for making reinforced ply is described. The apparatus includes a cross-head die assembly for use with an extruder, the cross-head die assembly having: an inlet section having an inlet for receiving flow from the extruder; an upper support block removably connected to a first side of the interior section; and a lower block removably connected to a second side of the interior section. A first flow passage is located between the upper support block and the interior section and is in fluid communication with the inlet. A second flow passage is located between the interior section and the lower support block and is in fluid communication with the inlet. The cross-head die assembly further includes a removably mounted die located at an outlet end of the assembly.

Abstract: A method of forming a layer of tire ply is disclosed. A first strip of ply is provided having a plurality of evenly spaced reinforcement cords, having a spacing S, and having a lateral end, wherein the last two cords are spaced apart a distance X, wherein X is not equal to S. A second strip of ply is provided having a plurality of evenly spaced reinforcement cords, having a spacing S, and having a lateral end, wherein the last two cords are spaced apart a distance Y, wherein Y is not equal to S. The lateral ends of the first and second strip are joined together in a lap joint. The first and second lateral ends are overlapped so that the spacing X partially or completely overlaps with the spacing Y.

Abstract: An article having a nanocomposite magnetic component and method of forming a nanocomposite magnetic component are disclosed. The article includes a plurality of nanocrystalline flake particles bonded along their prior particle boundaries. The nanocrystalline flake particles have a median grain size less than about 30 nanometers and include a first set of grains comprising predominantly permanent magnet phase and a second set of grains comprising predominantly soft magnet phase.