A 610mm diameter pin mill from Munson Machinery based in Utica, NY, US grinds, sizes, de-agglomerates and homogenises friable or other materials into controlled particle sizes, from coarse to fine (400 mesh).
Also known as a centrifugal impact mill, the CIM-24-MS is equipped with a stationary outer disc and a rotating inner disc, both of which are precision-machined and studded with impactor pins. As material enters through the centre of the outer disc, centrifugal force created by the rotating inner disc propels the material radially through a destructive path of five intermeshing rows of rotating and stationary pins, producing the tight particle size desired by controlling the infinitely-variable rotor speed.
Higher speeds to 5,400rpm pulverise friable powders, flakes and granules into fine grinds while killing any insects, eggs and larvae. Slower speeds down to several hundred rpm provide coarse grinding and de-agglomerating.
Typical applications include rice flour, starches, sugars, spices, vitamin powders, grains, sodium compounds, fertilisers, resins, clays and other friable products.
The infeed of the stationary outer disc can be equipped with flanged, threaded or other fittings for gravity-fed or inline-pneumatic applications.
The rotating disc rides on oversized pillow-block bearings and is driven by a 30 to 45kW motor with V-belt/sheave arrangement, delivering high throughput per kW compared with machines employing screens, hammers, knives or rolls.
The stationary outer disc disconnects using quick-release bolts and swings open on a cantilevered arm, providing full interior access to both discs for rapid cleaning or sanitising.
Made from mild steel with abrasion-resistant disc pins and durable exterior finish, the CIM-24-MS is available with all material contact surfaces of stainless steel finished to food and pharmaceutical standards, and of abrasion-resistant steel for processing of exceptionally hard or sharp materials.
Other models are offered with discs from 203 to 864mm in diameter, and drives from 11 to 93kW with multiple V-belt and sheaves, and direct drives.
