Abstract: A heat exchanger for exchanging heat through a heat transfer plate by flowing a primary air current and a secondary air current to a ventilation path is provided. An unit element including the heat transfer plate, and the ventilation path formed between the heat transfer plates by stacking the unit element in plural are arranged. The unit element is configured by integrally molding a spacing rib for holding a spacing of the heat transfer plate, and a shield rib for shielding leakage of the air current with resin. Furthermore, the unit element includes a stacking error detecting unit for determining a stacking error when they are stacked.

Abstract: A heat exchanger with reduced pressure loss, and improved productivity and strength. The heat exchanger is made by laminating first heat conduction plates and second heat conduction plates alternately. A first heat conduction plate and a second heat conduction plate are integrally molded of one sheet. The sheet includes air duct ribs, heat conduction planes, air duct end faces, first protrusions, first outer peripheral ribs, second outer peripheral ribs, air duct end covers, and second protrusions.

Abstract: A heat exchanger having light weight and an excellent recycling property and capable of exhibiting high sealing property of an air flow passage without using an adhesive agent. This heat exchanger is configured by alternately laminating heat transfer plates A and heat transfer plates B which are respectively integrated by vacuum molding a polystyrene sheet into heat transfer surface, air flow passage rib, air flow passage end surface, groove A, protrusion, outer peripheral rib A, outer peripheral rib B, air flow passage end surface cover, and a groove B.

Abstract: There is provided a resin molded component in which it is difficult for molding defects such as sink marks and welds and the like to occur in the design surface, and an apparatus for manufacturing the same.

Abstract: A heat exchanger having light weight and an excellent recycling property and capable of exhibiting high sealing property of an air flow passage without using an adhesive agent. This heat exchanger is configured by alternately laminating heat transfer plates A and heat transfer plates B which are respectively integrated by vacuum molding a polystyrene sheet into heat transfer surface, air flow passage rib, air flow passage end surface, groove A, protrusion, outer peripheral rib A, outer peripheral rib B, air flow passage end surface cover, and a groove B.

Abstract: There is provided a resin molded component in which it is difficult for molding defects such as sink marks and welds and the like to occur in the design surface, and an apparatus for manufacturing the same.