Method for controlling injection molding machine and injection molding machine

1. A method for controlling an injection molding machine in which first and second intermediate molds are disposed movably in a mold opening/closing direction between a movable platen attached with a movable mold and a stationary platen attached with a stationary mold, and by mold opening/closing means that include a movable platen moving means for moving the movable platen and intermediate molds moving means for moving the first and second intermediate molds, the stationary mold and the first and second intermediate molds are closed, and the movable mold and the first and second intermediate molds are closed, cavities are formed between the stationary mold and the first intermediate mold and between the second intermediate mold and the movable mold, and mold clamping is performed by mold clamping means, the method comprising:

single setting to set at least either

a mold opening relative speed setting value when opening the movable mold and the first and second intermediate molds and a mold opening relative speed setting value when opening the stationary mold and the first and second intermediate molds, wherein the mold opening relative speed setting value is a relative speed indicative of a change in distance of the stationary mold relative to the first intermediate mold at the time of mold opening and a change in distance of the second intermediate mold relative to the movable mold at the time of mold opening,

or

a mold closing relative speed setting value when closing the movable mold and the first and second intermediate molds and a mold closing relative speed setting value when closing the stationary mold and the first and second intermediate molds, wherein the mold closing relative speed setting value is a relative speed indicative of a change in distance of the stationary mold relative to the first intermediate mold at the time of mold closing and a change in distance of the second intermediate mold relative to the movable mold at the time of mold closing;

wherein, in response to the single setting of the mold opening relative speed setting value or the mold closing relative speed setting value, respectively at the time of mold opening or mold closing, first and second different absolute speed control values are automatically calculated; and

controlling the movable platen moving means to move the movable platen the first absolute speed control value, and controlling the intermediate molds moving means to move the first and second intermediate molds the second absolute speed control value.

2. The method for controlling an injection molding machine according to claim 1 ,

wherein, by the single setting,

a switching position of the mold opening relative speed setting value of the movable mold and the first and second intermediate molds and a switching position of the mold opening relative speed setting value of the stationary mold and the first and second intermediate molds are set at the time of the mold opening;

or

a switching position of the mold closing relative speed setting value of the movable mold and the first and second intermediate molds and a switching position of the mold closing relative speed setting value of the stationary mold and the first and second intermediate molds are set at the time of the mold closing.

3. The method for controlling an injection molding machine according to claim 1 , wherein at least either a mold opening time of the movable mold and the intermediate mold and a mold opening time of the stationary mold and the intermediate mold or a mold closing time of the movable mold and the intermediate mold and a mold closing time of the stationary mold and the intermediate mold is subjected to movement control for a same time even if the mold opening amount between the movable mold and the intermediate mold is different from the mold opening amount between the stationary mold and the intermediate mold.

4. The method for controlling an injection molding machine according to claim 1 , comprising rotating the first and second intermediate molds about an axis perpendicular to the mold opening/closing direction.

5. The method for controlling an injection molding machine according to claim 1 ,

wherein the single setting sets at least either

the mold opening relative speed setting value when opening the movable mold and the second intermediate mold and the mold opening relative speed setting value when opening the stationary mold and the first intermediate mold or

the mold closing relative speed setting value when closing the movable mold and the second intermediate mold and the mold closing relative speed setting value when closing the stationary mold and the first intermediate mold;

or

wherein the single setting sets at least either

the mold opening relative speed setting value when opening the movable mold and the first intermediate mold and the mold opening relative speed setting value when opening the stationary mold and the second intermediate mold or

the mold closing relative speed setting value when closing the movable mold and the first intermediate mold and the mold closing relative speed setting value when closing the stationary mold and the second intermediate mold.

6. An injection molding machine in which first and second intermediate molds are disposed movably in a mold opening/closing direction between a movable platen attached with a movable mold and a stationary platen attached with a stationary mold, and by mold opening/closing means that include a movable platen moving means for moving the movable platen and intermediate molds moving means for moving the first and second intermediate molds, the stationary mold and the first and second intermediate molds are closed, and the movable mold and the first and second intermediate molds are closed, cavities are formed between the stationary mold and the first intermediate mold and between the second intermediate mold and the movable mold, and mold clamping is performed by mold clamping means, the injection molding machine comprising:

a controller configured to receive a single setting;

wherein the controller is configured to set, by the single setting, at least either

a mold opening relative speed setting value when opening the movable mold and the first and second intermediate molds and a mold opening relative speed setting value when opening the stationary mold and the first and second intermediate molds, wherein the mold opening relative speed setting value is a relative speed indicative of a change in distance of the stationary mold relative to the first intermediate mold at the time of mold opening and a change in distance of the second intermediate mold relative to the movable mold at the time of mold opening,

or

a mold closing relative speed setting value when closing the movable mold and the first and second intermediate molds and a mold closing relative speed setting value when closing the stationary mold and the first and second intermediate molds, wherein the mold closing relative speed setting value is a relative speed indicative of a change in distance of the stationary mold relative to the first intermediate mold at the time of mold closing and a change in distance of the second intermediate mold relative to the movable mold at the time of mold closing;

wherein, in response to the single setting of the mold opening relative speed setting value or the mold closing relative speed setting value, respectively at the time of mold opening or mold closing, the controller is configured to automatically calculate first and second different absolute speed control values; and

wherein the controller is configured to control the movable platen moving means to move the movable platen the first absolute speed control value, and to control the intermediate molds moving means to move the first and second intermediate molds the second absolute speed control value.

7. The injection molding machine according to claim 6 , wherein single setting enables setting of both of a setting value of an injection device related to the molding using the movable mold and the second intermediate mold and a setting value of an injection device related to the molding using the stationary mold and the first intermediate mold.

8. The injection molding machine according to claim 6 , wherein at least either a mold opening time of the movable mold and the intermediate mold and a mold opening time of the stationary mold and the intermediate mold or a mold closing time of the movable mold and the intermediate mold and a mold closing time of the stationary mold and the intermediate mold is subjected to movement control for a same time even if the mold opening amount between the movable mold and the intermediate mold is different from the mold opening amount between the stationary mold and the intermediate mold.

9. The injection molding machine according to claim 6 , wherein the first and second intermediate molds are rotatable about an axis perpendicular to the mold opening/closing direction.

10. The injection molding machine according to claim 6 ,

wherein the controller is configured to set, by the single setting, at least either

the mold opening relative speed setting value when opening the movable mold and the second intermediate mold and the mold opening relative speed setting value when opening the stationary mold and the first intermediate mold or

the mold closing relative speed setting value when closing the movable mold and the second intermediate mold and the mold closing relative speed setting value when closing the stationary mold and the first intermediate mold;

or

wherein the controller is configured to set, by the single setting, at least either

the mold opening relative speed setting value when opening the movable mold and the first intermediate mold and the mold opening relative speed setting value when opening the stationary mold and the second intermediate mold or

the mold closing relative speed setting value when closing the movable mold and the first intermediate mold and the mold closing relative speed setting value when closing the stationary mold and the second intermediate mold.