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Screen Classifying Cutter Controls Particle Size Range

SCC-30 Screen Classifying Cutter reduces the size of hard, soft and/or fibrous materials in controlled sizes ranges with minimum fines at high rates.
 
The proprietary helical rotor design contains dozens of cutter blades attached to a helical array of staggered holders that continuously shear oversize materials against twin, stationary bed knives.
 
UTICA, NY — A new Model SCC-30 Screen Classifying Cutter from Munson Machinery cuts hard, soft and fibrous materials into controlled particle sizes with minimal fines at high rates, according to Charlie Divine, Marketing Manager of Munson Machinery.

The cutter features a proprietary helical rotor design with dozens of cutter blades attached to a helical array of staggered holders called "interconnected parallelograms" to continuously shear oversize materials against twin, stationary bed knives.

"Unlike conventional granulators containing a small number of angled rotor blades that slice materials into strips in scissor-like fashion, the SCC cutter is configured with cutter blades along the entire shaft, with no gaps between blades, making total contact with the product. As a result, the material is cut into uniform pieces with minimum fines and imperfections in the granulate and little to no heat generation," says Divine.

The blades are available in stainless steel, tool steel and tungsten carbide, and can be slid onto blade holders and secured with one retaining socket-head screw for rapid replacement.

Primarily employed for coarse grinding of materials into particles of uniform sizes ranging from granules down to 20-30 mesh, the cutter has a 30-in (762 mm) throat width and can be fitted with 60 parallelograms with 120 cutter inserts. Bed screen perforations range from 1/32 to 1½ in. (0.79 to 38 mm) in diameter and up to 3-in (76 mm) square, according to material characteristics and desired particle size. The 11-in (279 mm) shaft rotates at 30 to 3600 rpm, producing up to 1000 cu. ft. (28 cu. m) of sized product per hour, depending on application.

The cutter reportedly handles fiberglass insulation, potash, herbs and spices, flake materials, chalks, clays, coal, filter cake, sugar, wood chips, foods, foundry materials, grains, minerals, pharmaceuticals, pigments, powdered metals, medical waste, general chemical products and plastics, including scrap from thermoforming, molding and extrusion operations.

Material is fed through the top of an adjustable, double-baffled intake chute, or directly into the front of the chute though a hinged door. An independently powered, variable speed pinch roll feeder is offered for horizontal-rolled product feed. Discharge is via gravity, pneumatic transition or independently powered belt or screw conveyor.

The unit is equipped as standard with a multiple V-belt drive motor, and available with a direct-coupled drive and gear reducer.

Also offered are SCC-10, -15, -48, -60 and -72 models with throat widths of 10-in (254 mm), 15-in (381 mm), 48-in (1219 mm), 60-in (1524 mm) and 72-in (1829 mm) respectively. All are offered in industrial, abrasion resistant, stainless steel and food-grade construction.