A complete screw and barrel package for retrofitting standard injection machines to process liquid silicone rubber (LSR) is new from Nordson Polymer Processing Systems, New Castle, Pa. The Xaloy LSR package includes a rear seal, spring-loaded Xaloy ball check valve, and shutoff nozzle, as well as other components where needed, such as a feed-pipe adapter. The special screw is a single-flight unit with 12:1 to 14:1 L/D. The barrel has Xaloy X-800 inlay of nickel alloy with tungsten carbide for abrasion and corrosion resistance. It has a feed port moved downstream and two welded cooling jackets.
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RocTool’s year-old HD Plastics Materials Database further expanded.