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A tablet press in operation An old rotary tablet press. A tablet press is a mechanical device that compresses powder into tablets of uniform size and weight. A tablet press can be used to manufacture tablets of a wide variety of materials, including pharmaceuticals, nutraceuticals, cleaning products, industrial pellets and cosmetics.
The compression is done either by a single-punch machine (also called stamping press, achieves an output of approximately 200 tablets per minute, making it ideal for manufacturing small batches of tablets) or by a multi-station machine (rotary press). The tablet press is a high-speed mechanical device.
The documentation of activities by pharmaceutical manufacturers is a license-to-operate endeavor, supporting both the quality of the product produced and satisfaction of regulators who oversee manufacturing operations and determine whether a manufacturing process may continue or must be terminated and remediated.
The compression can take place in one or two stages (main compression, and, sometimes, pre-compression or tamping) and for commercial production occurs very fast (500–50 mg per tablet). Finally, the upper punch is pulled up and out of the die (decompression), and the tablet is ejected from the die by lifting the lower punch until its upper ...
The upper and lower punches compress the tablet in two steps as they travel across heavy compression rolls. The tablet is then ejected from the cavity and the process repeats. At full speed, a typical press can make over 250,000 tablets per hour. Reason Animation shows the complex, multi-step process of tablet pressing in a convenient view.
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For compression testing, the analyst generally aligns the tablet in a repeatable way, [2] and the tablet is squeezed between a fixed and a moving jaw. The first machines continually applied force with a spring and screw thread until the tablet started to break. [3] When the tablet fractured, the hardness was read with a sliding scale. [3]
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