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New Pin Mill Controls Particle Sizes, Cleans Rapidly

March 3, 2014
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A new 24-in.-diam pin mill model CIM-24-MS from Munson Machinery grinds, sizes, de-agglomerates, and homogenizes friable or other materials into controlled particle sizes, from coarse to fine (400 mesh).

Also known as a centrifugal impact mill, it 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 center 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 5400 RPM pulverize 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, fertilizers, 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 40- to 60-hp motor with V-belt/sheave arrangement, delivering high throughput per hp/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 sanitizing.

Constructed of mild steel with abrasion-resistant disc pins and durable exterior finish, it 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.

Munson Machinery Company, Inc., 800-944-6644 Utica, NY www.munsonmachinery.com

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Munson Machinery Co.