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 ...
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Posi-Melt™ SPX
The Advanced Posi-MeltTM "SPX" is a high performance Mixing Screw designed for high output molding or extrusion applications. The "SPX" design is unique in that it melts a majority of the plastic prior to entering the Mixing section by subjecting the material to the superior melting and mixing action of the Posi-MeltTM technology. The "SPX" mixing section is a mini-barrier in itself separating the melt flow into multiple channels and forcing the melt to pass over a barrier gap before exiting. The gap controls the final melt quality and the length of the mixer controls the output and minimizes the pressure drop. Superior melt quality leads to a more uniform fill rate and better shot-to-shot ...
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Posi-Melt™ SBX
The Posi-MeltTM "SBX" performance Barrier-Mixing Screw is an advanced screw for high output molding and extrusion applications. The "SBX" design is unique in that it melts a majority of the plastic prior to entering the barrier section by subjecting the material to the superior melting and mixing action of the Posi-MeltTM technology. Like most barrier designs, the "SBX" design forces all of the material to pass between the top of the barrier flight and the barrel ID, subjecting the melt stream to high shear and assuring 100% melting. The "SPX" mixing section is a mini-barrier in itself separating the melt flow into multiple channels and forcing the melt to pass over a barrier gap ...
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