No pharmaceutical processing facility is complete without a milling machine for active and inactive materials to manufacture tablets and other medicine products. Currently, the hammer mill and cone mill play the largest roles in the manufacturing these products and many others due to their versatility.
These mills produce smaller footprints in processing sites. They can also be equipped with integrated lifting columns to fit into any processing line.
Hammer mills, also known as turbo mills, are usually suitable for research and product development. They are great for continuous or batch production. They are also often used in situations where drug developers need precise particle reduction of hard to mill substances.
Additionally, a hammer mill can be employed to reclaim and reprocess broken tablets by grinding them again into its powder form for reforming. Incorrect hardness, overweight or underweight and bad appearance are some reasons that can render the tablets to be rejected by quality control. In such cases, the manufacturer still has the option to mill back the tablets to powder instead of just absorbing the loss. Re-milling them back reduces waste and increases productivity. When a batch of tablets does not meet the requirements, using a hammer mill will recuperate and reform the compound.
A hammer mill is capable of operating at speeds from 1,000 rpm - 6,000 rpm, producing up to 1.5 kilograms per hour. To achieve this production level, an automatic rotating valve is used to permit technicians to fill the milling chamber with materials without overfilling the machine.
More advanced turbo mills come with a dual-sided blade assembly which improves the viability of dry or wet ingredients. One side serves as a hammer to impact dry materials while the other knife-like side slices through the wet ingredients. Some hammer mill rotor assemblies can even be reversed for the necessary adjustment of product behaviour without disrupting the rotation of the mill. Turbo mills with shock resistance property are highly demanded to pharmaceutical industry due to their ability to work with higher-toxicity APIs which can risk dust explosion. They can resist pressure shocks as much as 10 bar. When it comes to processing heat-sensitive materials, manufacturers can use a hammer mill with single-mounted rotors as they produce less heat than the double side-mounted version.
At Classifier Milling System, we have a hands-on knowledge of the industry and equipment we offer which enables us to design and create specialized solutions for specific process solutions including high quality hammer mills. Contact CMS today to learn more.