Plastics Technology - Dedicated to improving Plastics Processing.
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WWW.NORDSONPOLYMERPROCESSING.COM EXTRAORDINARY TECHNOLOGIES FOR TODAY'S PLASTICS Meet us at Chinaplas 2017! Booth F41, Hall 2.1 Higher return on investment than with commonly used standard HVOF wear technologies, driven by reduced particle size, improved density and bond strength Estimated 3 - 4 times longer wear life compared to nitrided surfaces Xaloy ® MPX ™ Wear Coating For Injection & Extrusion Screws Xaloy ® MPX ™ Screws The latest developments in pack- aging machinery from SACMI of Italy (U.S. office in Des Moines, Iowa) include enhanced productivity of its continuous compression molding systems for bottle caps, and a newly enhanced high-speed, digital- cap printing system. In SACMI's continuous compression molding (CCM) system, an extruder and cutoff system feed "hockey-puck" shaped discs of molten plastic to an endless series of compression molds on a continuously moving conveyor. The latest "SC" series, designed specifi- cally for still-water caps, includes a 24-cavity CCM 24 SC, which now can produce 1000 caps/min, up from 600/ min previously. A 48-cavity CCM 48 SC (pictured) can mold 2000 caps/min, up from 1600 before. The 27-mm diam. caps weigh 1.29 to 1.35 g and have a 1.44-sec cycle. Contributing to the increased productivity are the Cool+ molds, which have improved cooling circuits that are more "conformal" to the cavity shape in both top and bottom molds. These molds can be retrofitted to older machines to boost output. Also new is the latest version of the Colora Cap digital cap printing system. It can store up 1 million images in memory and print up to 600 caps/ min, or less than 0.2 sec/cap. The system has four print heads. Previ- ously, the system could print only on white caps. Now it can print on colored caps by printing first a white circle and then printing the color image on the white area. 515-276-2052 • sacmiusa.com COMPRESSION MOLDING MATERIALS Cap Molding & Printing Productivity Is Enhanced Dielectric-Controlled Thermoplastics A new family of dielectric-controlled plastic materials for injection molding, thermoforming, and composite applications is available from ARC Technologies, Amesbury, Mass. The formula- tions—all of which are halogen-free, RoHs and REACH compliant—are offered with a wide variety of electrical properties. • PP6600 is a low-dielectric, low-loss thermo- plastic compound with good resistance to moisture and most chemicals. It is suitable for applications at 24 and 77 GHz, including radomes for automotive radar, and can be used as an impendance- matching material or as a dielectric spacer. • CA5000 is a highly-conductive plastic that provides excellent shielding over a wide frequency range. It boasts good temperature and corrosion resistance, and is suitable for molding electronic covers and enclosures. • PP2000 is a magnetic absorber that provides a balance of mechanical and electrical properties and is said to be well suited for surface-current reduction, cavity-mode suppression, and attenu- ating near-field emissions from 1 to 18 GHz. • WT-ACAG is a carbon-based absorber designed for attenuation in the 10+ GHz range. This product is suitable for glossy enclosures and housings and can be used to reduce or eliminate antenna- pattern side lobes and improve performance. 978-388-2993 • arc-tech.com 72 APRIL 2017 Plastics Technology PTonline.com Keeping Up W it h Technolog y