| 摘要 |
PURPOSE:To contrive to make a plurality of molded products by one time molding precise, by a method wherein injection and dwell processes are performed in a plurality of times, resin filling timings are controlled at every cavity by a runner opening and closing device and filling is performed by staggering times in relation to the cavities whose shapes are different from each other. CONSTITUTION:(n) times infection processes and dwell processes are performed repeatedly in a plurality of times during one cycle. A mold cavities are constituted of cavities A-N having different forms from each other, respective ones of which are provided with runner opening and closing device. When a mold is clamped, in the first time, the runner of the cavity A is broken, resin is injected and dwelled. Then after completion of the dwell, the runner of the cavity B is broken, the resin is injected and dwelled. The same is repeated and the whole cavities A-N are filled with the resin. Then the resin is cured by entering a cooling process, mold breaking is performed and a molded product is taken out. Therefore, the cavities A-N each are filled independently with the resin, a quantity of the resin to be filled is stabilised and high precision molding can be performed. |
