| 摘要 |
PURPOSE:To obtain a mold product having excellent stable quality by setting each gate at closed positions until a pressure sensor detects the specified increase of pressure and making a sealing resin reach to the terminal section of a runner. CONSTITUTION:When a top force 8 and a bottom force 9 are aligned and fixed tightly, stoppers 11 are inserted, each gate 2 is set at closed positions and a sealing resin is heated and softened, the sealing resin is extruded from a cull 6 to each runner 3 by pressurizing action. Since each gate 2 is set at the closed positions, the sealing resin is moved forward up to the terminals of each runner 3 successively and each cavity 1 is filled completely. When pressure in the runners 3 suddenly increases at that time, a pressure sensor 15 detects the increase of pressure and pressure in the runners reaches specified injection pressure close to injection pressure, an actuator 14 is operated by a controller, the stoppers 11 are pushed down and each gate 2 is opened simultaneously. Accordingly, the sealing resin starts inflow into each cavity 1 at a time, and the sealing resin flows in at the same pressure and the same speed and in the same viscosity. |
