| 摘要 |
PURPOSE: An optimal temperature control device of an injection mold for a light guide plate with a large section is provided to easily manufacture the light guide plate by evenly maintaining the cooling temperature over the whole area of a cavity. CONSTITUTION: An optimal temperature control device(10) of an injection mold for a light guide plate with a large section comprises a resin injecting unit(25) and a cooling unit. The resin injecting unit injects melted resins into the cavities(20) of a fixed mold core(15) and movable mold core(17). The cooling unit hardens the resins in the cavities. The cooling unit comprises first heat exchange passages(30,40) and second heat exchange passages(35,45). Heat exchange fluid flows into one side of the movable mold core and fixed mold core through the first heat exchange passages, and flows out through the other side. The heat exchange fluid flows into the other side through the second heat exchange passages, and flows out through one side. The first and second heat exchanger passages are placed side by side each other.
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