Method for controlling injection molding machine and injection molding machine

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.