Method for controlling powder compacting apparatus and compacting apparatus

A compacting apparatus comprising:

• an upper punch driven by a first actuator;
• a floating lower punch disposed below the upper punch, and the floating lower punch being driven by a second actuator to apply a prescribed pressure to an object along with the upper punch;
• and
• a stopper that defines a stop position of the floating lower punch,
• wherein the second actuator is configured to reduce a pressure applied to the object in a stepwise manner after the prescribed pressure is applied to the object.

A method for controlling a powder compacting apparatus including a die having a hollow;

• an upper punch and a floating lower punch that slide in the hollow, the upper punch and the floating lower punch defining a cavity along with the die;
• a first actuator that pushes down the upper punch;
• a second actuator that controls a floating load of the floating lower punch;
• and a stopper that defines a pressurization stop position of the floating lower punch, the method comprising:
• charging powder into the cavity;
• controlling the first actuator and the second actuator such that a load acting on the powder becomes a prescribed floating load;
• and
• reducing the floating load in a stepwise manner after application of the prescribed floating load.