Tablet Press Die Material-richpacking020.com

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Tablet Press Die Material

Jul 29, 2022

Tablet press die material

The punching die is an important supporting part of the tablet press. The punch and the middle die of the traditional tableting machine are made of steel. During the tableting process, friction will occur between the powder and the die wall and the upper and lower punches. This friction will reduce the transmission of the axial and radial forces of the powder, resulting in uneven distribution of pores and density in the powder. In severe cases, it will lead to The sheet weight varies greatly, and there are problems such as splits, laminations, and machine damage during sheet output. Moreover, friction will generate heat, and high temperature will affect the stability of heat-sensitive drugs.

The common method is to apply lubricant to the die of the tablet press to reduce wear or replace the punch with a new one. Lubricants are mostly hydrophobic substances, which can prolong the disintegration time of tablets and prevent water from entering the inside of tablets. Therefore, the larger the dosage, the greater the impact. However, the commonly used lubricant is magnesium stearate (obtained from animals), which is not easy to use in large quantities, and if the human body absorbs magnesium stearate excessively, it is easy to induce stones.

powder tablet press

In order to reduce the friction of the die, some researchers came up with the idea of using zirconia instead of steel. Zirconia die, zirconia has good toughness, and is an ideal wear-resistant material in engineering applications. It has high hardness and wear resistance, thus prolonging the use time of abrasive tools. The low coefficient of friction reduces the time to compress the powder and, more importantly, the tableting time. In addition, zirconia is antistatic, non-magnetic, and has low thermal conductivity. It will not affect the performance of tablets due to frictional heat generation. It is an ideal material for tablet presses to make punches.

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