Abstract: A method for coating a liquid sealant (61) at a periphery of a gas flow path and a water flow path on a separator for a fuel cell (57), including the steps of, at a coating-start portion (63) of the sealant, making a nozzle portion (33) provided at the sealant coating apparatus (24) be nearer to the separator than at portions other than the coating-start portion, and moving the nozzle portion at a horizontal moving velocity which is slower than at the portions other than the coating-start portion. By making the nozzle portion be near to the separator, pressing force pressing the sealant which is discharged from the nozzle portion against the separator becomes large, and turning up of a distal end portion of the sealant can be prevented by making the sealant adhere more to the separator. Further, by lowering the horizontal moving velocity of the nozzle portion, the sealant can be coated at a more uniform thickness.

Abstract: A method for coating a sealant (39) on a separator (40) for a fuel cell. The separator has a sealing groove (118) formed therein, and widths of the sealing groove at a coating-start portion (39a) and a coating-end portion (39b) of the sealant are made greater than widths of remaining portions of the sealing groove. The sealant coating-start portion and the coating-end portion are made to intersect at a place where the width of the sealing groove is large. Adhesion between the coating-start portion and the coating-end portion is improved, and also, degrees of freedom of a sealant coated position increase, and sealability of a cell for a fuel cell is improved.

Abstract: A method for coating a sealant (39) on a separator (40) for a fuel cell. The separator has in which a sealing groove (118), in which a sealant (39) is coated, is provided in a separator (40), formed therein, and widths of the sealing groove at a coating-start portion (39a) and a coating-end portion (39b) of the sealant are made greater than widths of remaining portions other than the coating start portion and the coating end of the sealing groove. The sealant portion, and coating-start portion and the coating-end portion of sealant are made to intersect at a place where the width of the sealing groove is made large. Adhesion between the coating-start portion and the coating-end portion is improved, and also, degrees of freedom of a sealant coated position increase, and sealability of a cell for a fuel cell is improved.

Abstract: A method for coating a liquid sealant (61) at a periphery of a gas flow path and a water flow path on a separator for a fuel cell (57), including the steps of, at a coating-start portion (63) of the sealant, making a nozzle portion (33) provided at the sealant coating apparatus (24) be nearer to the separator than at portions other than the coating-start portion, and moving the nozzle portion at a horizontal moving velocity which is slower than at the portions other than the coating-start portion. By making the nozzle portion be near to the separator, pressing force pressing the sealant which is discharged from the nozzle portion against the separator becomes large, and turning up of a distal end portion of the sealant can be prevented by making the sealant adhere more to the separator. Further, by lowering the horizontal moving velocity of the nozzle portion, the sealant can be coated at a more uniform thickness.