| 摘要 |
PURPOSE:To strengthen the engagement between a carbon plastic plate and an insulating frame by insert injection-molding the insulating frame on the carbon plastic plate while insert injection molding dies are heated in a specific temperature range. CONSTITUTION:Injection molding dies 31 and 32 insert injection-molding a carbon plastic plate 27 and an insulating frame 28 are constituted controllably at a constant temperature. The temperature of dies 31 and 32 at the time of injection molding is kept at 70-90 deg.C. The frame 28 is insert injection-molded around the plastic plate 27 in the constant-temperature state of dies 31 and 32. In an intermediate electrode 23 formed by such a means, the melting property between the peripheral section of the plastic plate 27 and the insulating frame 28 is improved, an electrolyte is prevented from being leaked from a biting portion, and the binding strength at this portion is improved. |
