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Reduce Friable Solids with Pharma Grade Pin Mill

Apr 13, 2015 | by Phil Black - Editor, PII
Category Mixing, Blending & Granulating       Hits: 2599

A new pharmaceutical-grade Pin Mill, model CIM-18-S316 from Munson Machinery, grinds friable powders, flakes and granules into controlled particle sizes ranging from coarse to fine.  Unlike conventional Pin Mills in which the static outer disc is removable but the inner rotating disc is not, the outer and inner discs can swing away from the unit on cantilevered arms, providing full access to both sides of both discs and the mill housing for rapid cleaning and sanitising.

High-speed rotation of the inner disc creates centrifugal force that accelerates bulk material entering the central inlet of the opposing stationary disc. As material travels from the centre to the periphery of the discs at high speed, it passes through a path of five intermeshing rows of precision-machined rotating and stationary impactor pins, with the desired tight particle size distribution obtained by controlling the rotor speed.

Setting the infinitely variable rotor speed between several hundred rpm and 5400 rpm provides the flexibility to use the machine for coarse grinding and de-agglomerating as well as for fine grinding down to 400 mesh.

Constructed of #316 stainless steel, the unit features a sanitary butterfly valve on the air intake, sanitary fittings at the material intake and discharge and a wash-down-duty motor.  

Vertical orientation of the mill housing on tubular stainless steel legs results in a smaller footprint than horizontally-orientated units.

Also called a “Centrifugal Impact Mill,” the unit provides high throughput rates per kilowatt relative to machines employing screens, hammers, knives or rolls, depending on the application.

Other size reduction machinery offered by the company includes Screen Classifying Cutters, Attrition Mills, Lump Breakers, Rotary Knife Cutters, Hammer Mills and Shredders. Blending equipment includes Rotary Batch Mixers, Ribbon/Paddle/Plow Blenders, Fluidised Bed Mixers, Vee-Cone Blenders, Rotary Continuous Mixers and High Intensity Blenders.

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