Injection Molding Screw
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Posi-Melt™ Multi-Purpose Screw
The revolutionary Multi-Purpose Posi-Melt TM screw is the Ultimate General Purpose screw for injection molding. The design is the first advancement to the core geometry of the plasticating screw since the early 1970’s with the advent of the barrier design. This design is the new GP standard for the Industry. The Multi-Purpose P.M. screw delivers a more thoroughly melted and homogeneously mixed melt pool than a standard GP design. By increasing the leads and “stepping “ the root through the metering zone (see fig. 1), the design disrupts the laminar flow that occurs with all GP designs. The end result is material that has a Screw Melt Quality IndexTM rating of 4.0, as compared ...
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Posi-Melt™ EXL
EXL Data Sheet The revolutionary Multi-Purpose™ Posi-Melt™ screw is the Ultimate Multi-Purpose screw for tough injection molding applications. The “EXL”™ design adds a high degree of additional melting and mixing to the polymer making this design one of the most advanced designs in the world. Repeatability and melt homogeneity are the basis for high productivity from an injection unit. From a process engineering perspective, the control variables that help us determine the correct injection screw design are: Resin type, Residence time, Swept volume, Plasticating rate, Screw torque, Cycle time, Melt temperature and Melt homogeneity. When the application demands precise color ...
