Injection molding method and injection molding machine
AssigneeNissei Plastic Industrial Co., Ltd.
InventorsHirofumi MURATA, Kenichi HAYASHI
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Abstract
A predetermined mold gap is provided beforehand between a movable mold and a stationary mold of a mold by a mold clamping device. A mold clamping pressure is set to zero, and a predetermined back pressure is set for the movable mold. Subsequently, the injection device is caused to start injection of the molten resin into the mold for which the mold gap, the mold clamping pressure, and the back pressure have been set. When a predetermined injection end condition set beforehand is satisfied as a result of progress of an injection filling process, a filling end process of ending the injection filling process is performed.
Claims10
An injection molding method for performing molding by injecting and filling a plasticized molten resin by an injection device into a mold clamped by a mold clamping device, the injection molding method comprising the steps of:
- providing a predetermined mold gap beforehand between a movable mold and a stationary mold of the mold by the mold clamping device;
- setting a mold clamping pressure to zero and setting a predetermined back pressure for the movable mold;
- subsequently, starting injection of the molten resin by the injection device into the mold for which the mold gap, the mold clamping pressure, and the back pressure have been set;
- and
- performing, when a predetermined injection end condition set beforehand is satisfied as a result of progress of an injection filling process, a filling end process of ending the injection filling process.
An injection molding machine including a molding machine controller and adapted to perform molding by injecting and filling a plasticized molten resin by an injection device into a mold clamped by a mold clamping device, wherein the molding machine controller comprises:
- a mold clamping controller configured to provide a predetermined mold gap between a movable mold and a stationary mold of the mold by controlling the mold clamping device, to set a mold clamping pressure to zero, and to set a predetermined back pressure for the movable mold;
- and
- an injection controller configured to perform an injection filling process of injecting and filling the molten resin, by controlling the injection device, into the mold for which the mold gap, the mold clamping pressure, and the back pressure have been set, and a filling end process of ending the injection filling process when a predetermined injection end condition set beforehand is satisfied as a result of the injection filling process.
Dependencies are inferred from the claim text.