Auxiliaries

Munson Adds Screen Classifying Cutter for Flexible Feeding

Infeed hopper length of Munson’s new Model SCC-15-SS screen classifying cutter is twice that of the feed throat to accommodate conveyor feeding of irregular shapes and sizes of hard, soft and/or fibrous materials. Photos courtesy of Munson Machinery Co.

Double-width infeed hopper uses mechanical shearing to downsize belt- or hand-fed material

Munson Machinery Co., of Utica, N.Y., has made an addition to its line of screen classifying cutters. The Model SCC-15-SS has a double-width infeed hopper that accommodates conveyor feeding of irregular shapes and sizes of hard, soft and fibrous materials by gravity.

The unit has a 30-inch-wide (76-cm.) hopper that funnels material into a 15-inch-wide (38-cm.) throat positioned over an 11-inch-diameter (279-mm.) solid-mass rotor containing 30 staggered, interlocking parallelograms, each of which holds two 0.5-inch-wide (12.7-mm.) cutter tips that can be easily replaced using one machine screw.

Mechanical Shearing Reduces Material to Specified Size

As material enters the infeed chute, it is subjected to successive mechanical shearing against bed knives until it is small enough to pass through bed-screen apertures, resulting in uniform size reduction from coarse down to 20 mesh with minimal fines or heat generation, and at high rates with reduced energy use.

There are 30 interlocking parallelograms in the cutting chamber, each holding two cutter inserts, that rapidly reduce coarse, friable, and fibrous materials into uniform particle sizes.

Bedscreen perforations range from 1/32 to 2 inches in diameter (0.79 to 51 mm.) and up to 3 inches square (76 mm.). The shaft rotates at 30 to 3,600 rpm, generating up to 500 cubic feet per hour (14 meters per hour) of sized product, depending on the application.

The cutter is fabricated with material-contact surfaces of 304 stainless steel and is powered by an optional 7.5-hp. (5.6-kW) gear motor drive.

Commonly reduced materials include plastics, compounds, thermoplastic scrap, carbon/aramid fiber, glass fiber insulation and ceramic honeycomb filter media, as well as a range of other materials.

Additional units in the SCC Screen Classifying Cutter line include models with 11-inch-diameter (279-mm.) rotors and throat widths of 10 inches (254 mm.), 30 inches (763 mm.), 48 inches (1,219 mm.), 60 inches (1,524 mm.) and 72 inches (1,829 mm.), as well as Mini Cutters for low-volume and laboratory applications, and Magnum Cutters with 18-inch-diameter (457-mm.) rotors for high production rates. All are offered in industrial, abrasion-resistant and food-grade construction.

By Plastics Engineering | October 2, 2023