ZP screws Designed for difficult-to-handle resins, including engineering grades, Zeiger's screws are built with the geometry and materials to match specific applications.
What's new? Designs tailored for use with liquid-crystal polymers, glass-filled nylon, glass-filled polyphenylene sulfide/PU sulfide, PC and polymethyl methacrylate. Made of corrosion- and wear-resistant steels, the screws incorporate modifications in root depth and flight width to bring pellets closer to the barrel, where they are exposed to the energy of the heater bands. During NPE2018, the company will demonstrate one of its liquid silicone rubber screws in the manufacture of automotive lighting lenses.
Benefits Higher throughput and greater wear resistance. Based on customer experiences, Zeiger said its screws have greater longevity and less downtime than general-purpose screws. Designed for wear-resistance, they require less maintenance and provide greater profitability. The screws also prevent issues specific to engineering-grade resins that can cause part imperfections. For instance, the screws for resins within the sulfone family prevent buildup of iron sulfide on the inside of a screw-and-barrel assembly; such buildup can cause black specks.
Zeiger Industries Inc., Canton, Ohio, 800-932-9120, www.mallardvalves.com
