Adhesion force confirmation method and adhesion force confirmation device

An adhesion force confirmation device for a mold handling device provided with a magnetic clamping device having a magnetizing coil, a reversible magnet whose magnetic poles are reversed according to a direction of electric current flowing in the magnetizing coil, and a non-reversible magnet on each of opposing plates proximate to or separated from each other, in which a mold is adhered and fixed to the opposing plates by a magnetic force of the reversible magnet and a magnetic force of the non-reversible magnet, comprising:

• an ignition circuit for controlling an amount of electric current of the magnetizing coil;
• and
• a controller for controlling the magnetic clamping device or the mold handling device, and
• wherein the controller controls the electric current of the magnetizing coil with the ignition circuit so that the magnetic clamping device exerts a magnetic adhesion force weaker than a normal magnetization, and
• the controller is configured to conduct a test to determine whether the mold peels from the opposing plates by separating the opposing plates after operating the mold handling device, and
• the controller is further configured such that when detecting peeling, a warning is issued to an operator that the adhesion force cannot be guaranteed, and otherwise, the controller controls the electric current of the magnetizing coil with the ignition circuit so that the magnetic clamping device exerts the magnetic adhesion force by the normal magnetization.