Ring extruder

In this process, a vacuum extrusion step (melt treatment) is followed by a continuous SSP (solid treatment). The process starts with PET flakes which are introduced without pre-drying into a ring extruder. The flakes are dried, melted and degassed inside the extruder. A gear pump builds the necessary pressure for melt filtration, where solid particles are removed. After granulation the pellets are fed to a continuous three-step SSP unit [10]. 

Activated Charcoal Alumina Animal Feed Boric Acid Lignosulfonate Water Molasses Water Turbulator TurbulatorVDisc Ring Extruder Disc Pelletizer... 

Figure 12.15. Two types of extrusion pelleting equipment, (a) Screw-type extruder for molten plastics The die is turned 90° in the illustration from its normal position for viewing purposes. The extruded material is cooled and chopped subsequently as needed (U.S. Industrial Chemical Co.), (b) Ring extruders material is charged with screw conveyors to the spaces between the inner rolls and the outer perforated ring, the ring rotates, material is forced through the dies and cut off with knives.

Figure 4.37 Ring extruder barrel and screw shafts [231...

Bauer, 71, Black, P. Maschinen- und Verfahrenstechnik des Ring Extruders, VDI-Tagung Polymeraufbereitung 2002, Baden-Baden... 

Claim is laid in this patent for double-flighted and triple-flighted shoulder elements in a multiple screw extruder, particularly in a ring extruder. A low product stress and decreased energy input result. 

Supported catalysts represent the largest group of heterogeneous catalysts and are of major economic importance, especially in refinery technology and the chemical industry. Supported catalysts are heterogeneous catalysts in which small amounts of catalytically active materials, especially metals, are applied to the surface of porous, mostly inert solids - the so-called supports. The supports can have special forms such as pellets, rings, extrudates, and granules. 

Co-Kneader (Ko-Kneader) having Reciprocating Scre v and Pin Barrel -Parrel Continuous Mixer -List Continuous Mixer -Ring Extruder. 

CONTINUOUS MIXING OF RUBBER WITH THE RING EXTRUDER... 

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