A rotary tablet press is a sophisticated machine used to create tablets from powder or granules. It operates by using a rotating turret that holds multiple tooling stations, each equipped with punches and dies. As the turret rotates, the punches move between upper and lower compression rolls, applying pressure to the material to form tablets of uniform weight and shape. This process is known as accordion-type compression, where the compaction force is applied in the middle.
How does a rotary tablet press work? 5 Key Steps Explained
1. Tooling Stations and Turret Rotation
The rotary tablet press is equipped with a turret that houses multiple tooling stations. Each station includes a pair of punches (upper and lower) and a die. The turret's rotation is synchronized with the movement of the punches, ensuring that each station passes through the compression zone in a precise sequence.
2. Compression Process
As the turret rotates, the punches move along a predetermined path. When a tooling station reaches the compression zone, the upper and lower punches converge, applying pressure to the material contained within the die cavity. This compression transforms the powder or granules into a solid tablet.
3. Accordion-Type Compression
Unlike single punch presses where the compression force is applied from one direction, rotary presses use a mechanism where both upper and lower punches move towards each other, applying force from both sides. This method, referred to as accordion compression, ensures a more uniform distribution of pressure, leading to tablets with consistent density and weight.
4. Ejection of Tablets
After compression, the finished tablets are ejected from the die cavities as the tooling stations move away from the compression rolls. This is facilitated by mechanisms such as ejection cams or similar components that push the lower punch upwards, expelling the tablet from the die.
5. Versatility and Output
Rotary tablet presses are designed to handle a variety of tablet shapes, sizes, and materials. They are capable of high-volume production, making them suitable for large-scale manufacturing in industries such as pharmaceuticals, food, and chemicals. The ability to adjust parameters like turret speed, filling depth, and tablet thickness allows for flexibility in production, accommodating different product requirements.
Continue exploring, consult our experts
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