The present invention offers a technique for providing assistance in setting up control for releasing gas from the interior of a mold device to the outside of the mold device. A display device for an injection molding machine display a screen. The screen includes a tab display field, in which a plurality of tabs are arranged, and a selection screen display field, in which selection screens that are selected for the respective plurality of tabs are displayed. The tab display field includes a first tab. The first selection screen, displayed in the selection screen display field when the first tab is selected, includes a plurality of input columns for use in a control of the release of gas from the inside of the mold device to the outside of the mold device.

A control device for an injection molding machine configured to fill a cavity space inside a mold device with a molding material includes a memory, a processor coupled to the memory, and a temperature regulator controller configured to control a temperature regulator configured to regulate a temperature of the mold device. The temperature regulator controller controls the temperature regulator based on a dew point temperature of a surface of the mold device, the surface forming the cavity space in the mold device.