Tablet production method and tablet production apparatus
A tablet production apparatus comprising a gas generator G, a lubricant powder discharge means 51 for discharging a lubricant powder into a gas generated from the gas generator G, depending on the supply of the gas from the gas generator G, and mixing the lubricant powder with the gas in dispersed state, a lubricant application means 91 for spraying the lubricant powder discharged from the lubricant powder discharge means 51 and mixed with the gas generated from the gas generation means G in dispersed state, onto each material contacting surface of a die, an upper punch and a lower punch, and an oxygen concentration measuring means 131 a for measuring the oxygen concentration of the gas existing near the lubricant application means 91 . The apparatus is designed such that the amount of the gas supplied into the lubricant application means is adjusted based on the oxygen concentration measured by the oxygen concentration measuring means 131 a.
1. A tablet production apparatus comprising:
a gas generator for generating a nonflammable gas;
a lubricant powder discharge means for discharging a lubricant powder into a gas generated from said gas generator for mixing said lubricant powder;
a lubricant application means for spraying said lubricant powder onto each material contacting surface of a die, an upper punch and a lower punch;
a suction means for sucking thereinto said lubricant powder sprayed from said lubricant application means;
a spray amount measuring means for measuring the lubricant powder concentration at an optional point from said lubricant powder discharge means to said lubricant application means; and
an antistatic means,
whereby the flow amount to be sucked into said suction means is adjusted based on the lubricant powder concentration calculated from the amount of said lubricant powder measured by said spray amount measuring means and the flow amount sucked into said suction means to make the concentration of said lubricant powder in the suction means equal to or less than 30 g/m 3 .
2. The tablet production apparatus as set forth in claim 1 wherein said gas generator generates a pulsating vibration gas therefrom.