ROLLER EMBOSSING METHOD FOR FLEXIBLE GRAPHITE POLAR PLATES OF FUEL CELLS

A roller embossing method for flexible graphite polar plates of fuel cells comprises the following steps: (1) adjusting a clearance of an embossing roller pair of a roller press to a target thickness value of a monopolar plate; (2) feeding, by a feed device, a flexible graphite slab in front of the embossing roller pair, and entangling the flexible graphite slab by means of opposite rotation of the embossing roller pair; (3) after the flexible graphite slab is entangled, continuing to forward roll the slab for 10-100mm, and then reversely rolling the slab for 5-90mm by means of synchronous and opposite rotation of an upper embossing roller and a lower embossing roller, wherein one time of forward rolling and one time of reverse rolling are referred to as reciprocal rolling; (4) forming a polar plate after several times of reciprocal rolling, and separating the polar plate from the embossing rollers; and (5) performing subsequent treatment on the roll-formed flexible graphite polar plate. Compared with the prior art, the method of the invention can realize continuous, automatic and efficient production of ultra-thin inductile flexible graphite polar plates with a narrow landing, a short center distance, a large channel depth and a small draft angle.