Patent ID: 7931999

Claim:
A manufacturing method for an electrode-membrane-frame assembly used in a polymer electrolyte fuel cell assembled by stacking a plurality of single cell modules each comprising an electrode-membrane-frame assembly which is formed of a membrane electrode assembly constituted by binding an anode electrode to one surface of a polymer electrolyte membrane member and binding a cathode electrode to the other surface of the electrolyte membrane member and a frame which contains a gas supply section that supplies fuel gas and oxidizer gas to the anode electrode and the cathode electrode respectively and which sandwiches the periphery of the membrane electrode assembly to hold the membrane electrode assembly; and a pair of separators which sandwich the electrode-membrane-frame assembly from the anode side and the cathode side, the method comprising: arranging a first frame member and the membrane electrode assembly in a first mold for injection molding such that an edge of the electrolyte membrane member in the membrane electrode assembly is arranged on the first frame member; arranging a second mold on the first mold to form a resin flow passage for forming a second frame member, the second mold being in contact with the first frame member by interposing the electrolyte membrane member, and pressing and fixing a part of the edge of the electrolyte membrane member to the first frame member by a presser member mounted on the second mold; injecting a molding resin material into the resin flow passage to fill the resin material in the resin flow passage in the condition where the electrolyte membrane member is fixed by the presser member; and curing the filled resin material to form a second frame member which is bound to the first frame member integrally in the resin flow passage and sandwiches the edge of the electrolyte membrane member between the second frame member and the first frame member to hold the edge of the electrolyte membrane member.