Harmo Co. of Japan (represented here by Maruka U.S.A. Inc., Lees Summit, Mo.) has developed a novel granulator design that dices scrap plastics by a reciprocating cam motion, not rotating knives. Harmo’s SPCII Gran-Cutter has a conventional S Cutter rotor with large hooked knives to precut sprues and runners, which then fall into the unusual reciprocating press. The moving side of the press, with a cam-driven rocking motion, has a row of short, square teeth that intermesh with mating pockets in the stationary side of the press to bite off uniform, pellet-like granules. Because it cuts, rather than crushes, it generates little heat, dust, or noise, Harmo says. It reportedly works on both soft, flexible materials like PE and TPE and on hard plastics like TP polyester and ABS. Maruka has two Gran-Cutters available for trials at its Chicago tech center in Lombard, Ill.
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