| 摘要 |
<p>Disclosed is a method for controlling the temperature of a mold for injection molding. The temperature of a front surface portion (56) of an upper mold (50) neighbored a gate which is connected to a spool to which the melted resin is injected through a runner, is controlled as 65-75 °C. The temperature of a side surface portion (58) of the upper mold (50) between the front surface portion (56) and a parting line (54), is controlled as 45-55 °C. Then, a cavity portion (52) corresponding to the upper mold (50) is formed. The temperature of a core portion (60) which is positioned at a concave portion of a mould product, is controlled as 35-45 °C. The generation of a weld line or a chromic aberration can be restrained.</p> |
