Mold body and method for monitoring the mold body

A mold body, comprising:

• a mold plate having an end face and defining a casting side which is capable of being reworked through material removal to incrementally change a thickness of the mold body;
• a sensor box including a base body inserted in the end face at a distance from the casting side of the mold plate, an NFC antenna, a control unit and a battery, with the control unit including a processor, a flash memory, a RAM memory, at least one further sensor, and a second antenna, said sensor box including a flange projecting toward the casting side of the mold plate;
• and
• a length sensor system arranged on the flange of the sensor box for measuring the thickness of the mold plate, said length sensor system including several conductor tracks arranged at a distance to each other in a thickness direction,
• wherein material of the length sensor system is removed to incrementally decrease a number of the conductor tracks extending at a distance to each other, and
• wherein the sensor box is designed to determine a measured value based on the number of existing conductor tracks, which measured value correlates with the thickness of the mold body.