| 摘要 |
A press-forming apparatus comprises a pair of press-forming units detachably secured to movable and stationary units facing each other, respectively. A metallic material is subjected to a press-forming through the press-forming units and then discharged therefrom as a heat transfer member for a heat exchanger. Each of the press-forming units comprises (i) a main forming section for forming on the material a heat transfer face with a corrugated portion, (ii) a pair of first subsidiary forming sections disposed on upstream and downstream sides of the main forming section so as to be adjacent thereto in the feeding direction of the material and (iii) a forming section-support base member detachably supporting the main forming section and the first subsidiary forming sections. The main forming section has a press-forming face with main corrugation patterned portions that are symmetric with respect to a central line perpendicular to the feeding direction of the material, and boundary patterned portions, on which recesses and projections align in a direction perpendicular to the feeding direction of the material. The first subsidiary forming sections of one of the pair of press-forming units is adjustable to shift press-forming faces thereof along a pressing direction, so as to provide switchably a contact mode in which the press-forming faces come into contact with the material together with the main forming section to apply a press-forming operation to the material and a non-contact mode in which the press-forming operation is not applied thereto.
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