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A new, patent-pending design for dual- or multi-layer versions of Premier and Ultra- coat fluid coating dies from Nordson Corp., Chippewa Falls, Wis., reportedly makes it easier to achieve parallel alignment of the lip faces, which is critical for maintaining uniform, defect-free coating and preventing impingement of the lips against the roll. In the standard design for Premier fixed-lip and Ultracoat adjustable-lip slot dies, operators make changes to the die gap—and thus the wet film thick- ness of the coating—by inserting thin metal strips or shims between the die bodies, then using more shims at the rear of the die to eliminate the resulting offset of the lip faces and to ensure that they are once again in the same plane. Until now, use of these "offset shims" has been more complicated in multi-layer dies, requiring calculations to determine which shim thickness most closely achieves lip-face parallelism. The new design makes such calculation unnecessary, ensures a more precise lip-face alignment, and prevents human error. Nordson reconfigured the die bodies of multi-layer Premier and Ultracoat systems so that the offset blocks, where the offset shims are inserted, are now in the same plane as the lip face. As in the past, body shims and offset shims are available in thicknesses ranging up to 0.060 in. With the new design, the accuracy of the offset adjustment is independent of body shim thickness. Replacing multiple coating passes with a single product run means an increase in output and a reduction in machine use, energy consumption, and scrap. Additional cost savings result from control over the thickness of each layer, preventing over-use of expensive high-functionality fluids. 715-726-1201 • nordson.com EXTRUSION COMPOUNDING Fluid-Coating Die Boosts Accuracy, Adjustability TEAM UP. Score a touchdown with Lusin ® and Ultra Purge™! Lusin® and Ultra Purge™ are now on the same Chem-Trend roster, providing thermoplastics processors with a stronger range of purging compounds, release agents and mold maintenance products. We're focused on helping our customers score big with increased efficiency, less scrap and reduced operational costs. Get in the game – and call Chem-Trend today! ChemTrend.com maintenance tracking MADE EASY. Drop-down Menus | Standardized Terms | Tech Tips Status Alerts | Powerful Reports | FREE TRIAL Simple-to-use maintenance software that gives you total mold control. NOW OFFERING: Mold maintenance training courses. moldtrax.com New Screw Elements Permit Major Output Gains Involute screw and kneading elements with a new and patented cross-section design have been introduced by Coperion (U.S. office in Sewell, N.J.) to significantly increase throughput rates of its twin-screw ZSK compounding extruders. These screw elements are suited to highly filled recipes, such as 70-85% CaCO 3 or TiO 2 , and 20-50% talc, in PP or PE. Besides higher throughput rates, these involute screw elements ensure higher loading of filler, better dispersion and homogenization, and lower energy consumption. Coperion's tests reportedly showed "remarkable" throughput increases. For example, when processing PP with 70% CaCO 3 on a ZSK 58 Mc 18 , the new screw elements achieved a 64% increase from 1212 to 1984 lb/hr. When processing PE with 80% CaCO 3 on a ZSK 92 Mc 18 , throughput increased 36% from 4850 to 6614 lb/hr. 856-589-0500 • coperion.com 64 JUNE 2017 Plastics Technology PTonline.com Keeping Up W it h Technolog y