Vacuum Feeders
The Vacuum Feeders are commonly used with automation of plastics processes such as plastics extrusion, compounding and resin manufacturing can be accomplished with pneumatic conveying, feeders and related bulk material handling equipment. There handling systems are used for transporting powder and granular bulk materials from rail car unloading to storing and dust collection systems, conveying to feeding, blending, scaling, and sifting operations and integration with drying systems.
Gravimetric and volumetric feeders and pneumatic conveying components are in the flow of plastics, from resin manufacturing, to precision compounding, high speed compounding, and end product extrusion. These feeders control the flow of the granular base polymer and a filler, carbon black, slip agent and other additives to a pelletizer. Two grades of the resin are fed by smart flow meters with rotary valves. The filler is proportioned by a high-rate modular single screw loss-in-weight feeder, while the difficult to handle carbon black requires twin screw feeding. Slip agent and other additives use lower capacity feeders. Controller handles up to 15 feeders. Feeders help make a wide range of additives used in plastics, too. Twin screw loss-in-weight feeder doses ingredients to a classifier to produce various grades of the pigment.
With the higher throughput rates made possible with today's high-speed extruders, Continuous Gravimetric Blender System allows four to six ingredient stations with Premier Pneumatics conveying receivers easily grouped around the extruder inlet. Ingredients are continuously feed in sychronized, weighed proportion, whether pellet, granule or powder. Resin and other high rate components such as filler merge with other ingredients at the throat, eliminating the need for mixing. Liquid loss-in-weight feeders can introduce liquid additives downstream.
End product extrusion: In critical end product applications like wire and cable coating, quality hinges on reliably consistent blend accuracy. By combining all-digital weighing technology, microprocessor control, and the broadest range of material handing capability, feeding system continuously proportions pellets, powders and granules at the extruder, eliminating the need for mixing and assuring the highest possible end product consistency.
Fiber and Filaments: Feeders are the key to color. In carpet filamentmanufacture, even the subtlest variation is unacceptable. With feeding system, processors can handle nearly any ingredient online, without risk of material segregation - a major cause of transient color shift. The stability of all digital system, from weight measurement to feeder control, assures blend consistency not only from moment to moment, but from day to day, week to week, month to month.
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