The structure of the pre-pressing device of the tablet press

(1) Pressure: The pressure of the pre-compression device directly affects the compression capacity of the tablet press. If the tableting pressure is too small, the tablet cannot be pressed out, and if the tableting pressure is too high, the mold or the tableting equipment will be damaged.

(2) Pre-compression time: Under the condition of ensuring normal tablet compression, the pre-compression time should be shortened as much as possible. If the weight of the pressed tablet is relatively light, the speed of the pressing roller can be reduced; if the weight of the pressed tablet is heavy, the speed of the pressing roller can be increased.

(3) Tablet roller speed: The working speed of the tablet machine is generally 40~60r/min. If the pressed product is required to be light in weight, low in water content, high in hardness, low in brittleness, and relatively sticky between particles In severe cases, the speed of the tablet roller should be appropriately increased.

(4) Pressurization time: Generally pressurize after one minute. If pressurization is done after one hour of work, the pressure will be uneven, and the phenomenon of "false pressure" will easily appear.

(5) The pressing height is determined by the height of the upper mold and the height of the lower mold. The higher the height of the upper mold, the greater the pressure; the higher the height of the lower mold, the smaller the pressure.

(6) Pressurization position: the force on the upper mold is the largest; the force on the lower mold is the smallest; if the load on the upper mold is large and the load on the lower mold is small, the space of the lower mold can be used; if the potential load on the upper mold is large, it should be Add backing boards or other support structures to the lower part of the model below.

(7) The assembly of the mold should pay attention to the following points:
a. The tablet pressing mold should cooperate with the tablet pressing roller and the upper die frame to ensure the smooth progress of tablet pressing.
b. The upper and lower mold frames of the tableting mold must be closely matched to prevent the gap between the tableting mold and the tableting roller from being too large or too small during tableting.
c. The upper and lower mold bases should be cleaned before tableting.
d. The lower mold and the upper mold base must be on the same level during operation.
e. After the tablet pressing mold is installed, the gap between the upper and lower mold bases should be adjusted to an appropriate position.

(8) Matters needing attention:
a. Before use, check whether the tablet compression mold is intact or not.