| 摘要 |
PURPOSE:To equalize quality of product and to improve productivity by a method wherein the fixed side die plate and the movable side die plate in a die are released from the die at the time of molding, a molded product integrated with the gate is forced to be cut and the molded product only at first and then the gate and the sprue piece are released from the die. CONSTITUTION:The knockout bar 6 is projected through the movable side fitting plate 5. The ejector plates, upper 3 and lower 4 are extruded to project the ejector pin 7 through the movable side die plate 2 and to release the molded product 2 from the die. On the other hand, the sprue lock pin 8, and the ejector plates, upper 3 and lower 4 are pushed down as they are made freely slidable. The gate 13 and the sprue piece 14 abut to each other on the movable side die plate 2 and remain there. Then, the knockout bar 6 is ejected again to extrude the sprue pin 8 and to take out the gate 13 and the sprue piece 14 left in the movable side die plate 2 from the die. In a series of die clamping processes, molded products 12 are molded continuously and at the same time, the gate 13 and the sprue elements 14 are cut and released from the die automatically. |
