| 摘要 |
PURPOSE:To concurrently form plural developing plates with good efficiency by an injection molding method using a multi-staged mold. CONSTITUTION:A developing plate of an average thickness of 0.3-3mm. is formed of a thermoplastic resin mainly by injection molding using multi-stage molds. The developing plate is printed by hot stamping, etc., as needed and made into a box. The plate is molded through a fixed mold 21 and movable molds 22 and 23 having two cavities 25 and 26. A molten thermoplastic resin is sent under pressures through a gate 27 formed inside of the fixed mold 21 from an injection cylinder 24 into the cavities 25 and 26 for molding. |
