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Parallel Twin Screw Extruder
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, 2015-12-28 at 19:30 (8416 Views)
Milacron's new small-footprint parallel twin screw extruder, the Atlas 93, is said to give powerful features for windows profile processing. Just like the manufacturer's 114 and 135 styles, which it complements, the Atlas 93 is also said to be ideal for producing PVC pipe, siding, and sheet, as well as for processing various foam applications. The counter-rotating parallel screws of the Atlas 93 have a length-to-size ratio of 26:1 L/D (measured from the downstream end of the feed port), says Milacron. The feed area provides "exceptional" surface, allowing efficient high temperature transfer to the feed materials. Further, the manufacturer explains, a minimal compression ratio, distributed over a longer L/D ratio, reduces screw deflection and significantly extends the life span of both screws and barrels. All operational system features are designed into a "unitized base," simplifying installation, procedure, and maintenance, says Milacron. Simple "drop-in-place" machine installations and single electrical drop requirements enable processors to end up being ready to go quickly, the company adds. Normal features reportedly include: *High-capacity four-shaft gearbox (unlike most other parallel twins screw extruders, which use a three-shaft design) with integral casing containing both reduction and distribution gearing for higher torque and thrust potential; *Metered dosing feeder for exact intake volume and broad processing latitude; *Consistent, controllable process cooling and heating system featuring five barrel process zones with the three downstream zones using normal water cooling--a design that's said to be "nearly free of maintenance," compared with that of oil-cooled devices; *Availability of microprocessor controls or discrete instrumentation at the same price; *Subcomponents such as vacuum pump and engine, barrel cooling screw and system oil heating/cooling system installed on slide-out trays for easy maintenance; *Direct-coupled Reliance AC vector drive and motor program for extended service on PVC production; *Milacron Exc microprocessor control, which "oversees" the extruder procedure and provides a regular, all-inclusive control station.