| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber injection molding machine capable of weighing rubber as specified by a preset target level simply and with high precision, without requiring much weighing time. SOLUTION: This rubber injection molding machine comprises the following components: a plasticizing cylinder 1 with an internally installed screw 4 for conveying a rubber material in the process of platicization, an injection cylinder 2, with an internally installed plunger 9, which allows loading of the screw-conveyed plasticized rubber inside and injects the rubber, a back-flow prevention valve 8 which prevents a back flow of the rubber loaded into the injection cylinder 2 from the plasticizing cylinder 1, a motor 6 for rotating the screw 4, a rotary speed detector 7 for detecting the rotary speed of the screw 4, and a plunger position detector 10 for detecting the position of the plunger 9. In addition, the rubber injection molding machine is equipped with a control part 11 which controls in the way that the screw 4 is switched to a second rotary speed which is lower than the first rotary speed, when the screw 4 is rotated at the first rotary speed to convey the plasticized rubber and the position of the plunger 9 reaches right before the weighing end position. COPYRIGHT: (C)2009,JPO&INPIT |
