MACHINES FOR THE PRODUCTION OF TABLETS

Extruder for pharmaceutical production

8491

8493076

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The extrudate is obtained as a result of punching on special devices — extruders. After extrusion (punching), either cutting or spherization of microgranules occurs, followed by drying. Screw extruders (5-15 atm.) and radial-pushing extruders are used to carry out the extrusion process. In a screw extruder, the screw rotates in the drum and the material is forced through holes in the plate at the end of the drum. In the radial-pushing extruder, the extrudate is forced radially and exits through the holes. The advantages of the presented extruders are as follows: ensuring good mixing; high productivity during continuous production; the possibility of using the released heat; easy cleanability and replaceable internal parts. The disadvantage is the formation of stagnant zones.

Rotary tableting machines

8487

8493040

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Rotary tablet machines (RTM), unlike eccentric ones, have a large number of matrices and punches. The matrices are mounted in a rotating matrix table. The pressure in the RTM increases gradually, which ensures a soft and uniform pressing of the tablets. rTMS have high productivity (up to 0.5 million tablets per hour). The technological cycle of tableting on RTM consists of a number of sequential operations: Filling the matrices with tableted material (volumetric dosing method). Actually pressing. Ejection. Dropping pills. The operations are performed sequentially in automatic mode. The upper and lower punches slide along the guides (caps) and pass between the pressing rollers, exerting simultaneous pressure on them. The pressure increases and decreases gradually, which leads to uniform and soft pressing of the tablet from above and below. Depending on the type, such machines can be equipped with one or two fixed loading funnels. An agitator can be installed in the loading funnels. The sequence of movement of one of the matrices consists of the following operations: Download operation. The lower punch 3 dropped into the precisely determined position. The upper punch 2 is in the uppe...

Characteristic that all tablets are produced on one set of press

8489

8493058

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An eccentric machine is a single-position machine in which, when performing basic operations, processing objects (tablets) do not make transport movement. Each operation of the technological cycle is performed by a separate executive mechanism: loading (dosing), pressing, ejection mechanisms. For such machines, it is characteristic that all tablets are produced on one set of press tools.