| 摘要 |
PROBLEM TO BE SOLVED: To provide a core dissolving method which can increase speed when a core of a water soluble resin is removed after the molding of a resin and control costs of a core dissolving process. SOLUTION: A plastic molded article 2 with a water soluble resin core 1 is connected with a connector form which hot water is ejected and immersed and fixed in a constant-temperature water bath 5 filled with hot water. The temperature of the hot water is maintained by the heater 15 of a water temperature adjuster 6. A conveying pump 7 sucks the hot water from an intake 16 and circulates the water through the void of the core 1. The pump 7 is controlled by setting a water pump control board 8, the flow rate of the hot water flowing through the void of the core 1 is changed on the basis of set flow acceleration, deceleration time, cycle, maximum flow rate, minimum flow rate, etc. |
