| 摘要 |
A method for injection molding comprises the following steps: a step of preparing a first mold (41), a second mold (46), and a third mold (47), a step of sandwiching a separator single body (16) by the first mold (41) and the second mold (46), a step of injecting silicone rubber (59) into a front-side cavity (50) through a gate (52) to form a front-side formed layer (32), a step of replacing the second mold (46) with the third mold (47) while the front-side formed layer (32) is soft, and a step of penetrating the front-side formed layer (32) by injection pressure of the silicone rubber (59) injected through the gate (52), filling the silicone rubber (59) into a back-side cavity (63) through a penetration hole (30), and forming a back-side formed layer (34).
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