Die block device

A die block device comprising:

• a die block portion configured to reciprocate between an operation position for extrusion and a changing position for a die changing operation;
• a gas supply portion configured to supply a cooling gas toward the die block portion;
• and
• a controller,
• wherein the die block portion includes a block body having a support surface that supports a die, a temperature sensor that detects a block body temperature, a heater incorporated in the block body, and a gas channel having a supply port for the cooling gas and an exhaust port that extends from the supply port through the block body and opens into the support surface,
• the gas supply portion includes a supply passage provided to communicate with the gas channel through the supply port when the die block portion is in the operation position,
• the die block device is configured such that communication between the supply passage of the gas supply portion and the gas channel of the die block portion is released when the die block portion moves from the operation position to the changing position,
• the controller is configured to determine if the block body temperature detected by the temperature sensor exceeds a previously set temperature, and
• when the detected block body temperature exceeds the previously set temperature, the controller is configured to:
• reduce a heating temperature of the heater,
• further monitor the detected block body temperature for a previously set time, and
• supply the cooling gas to the supply passage until the detected block body temperature falls below the previously set temperature.