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With the tenet of “be sincere, be scientific”, Nanjing Chengke company focuses on the works of R&D , design, sale and after-sale for co-rotating & counter-rotating twin-screw extruders, tandem compounding lines and single-screw extruders.
Chengke was founded by senior engineers in twin-screw processing，we have advanced management systems and high-effective operation teams. Our business concept is to analyze the problems, to offer the best solutions and to provide custom mouldings. High-beginning, high-quality, and optimal designs are our company’s characteristics, which can meet the first-class product quality standard as other companies worldwide.
we focus on the works of twin screw:
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The twin screw extruder performs the same basic process tasks
Whether the screw rotation is co-rotating or counter-rotating, the twin screw extruder performs the same basic process tasks: feeding, melting, mixing, venting, and inducing die/localized pressure. Modular screws and barrels make an infinite number of process configurations possible.
Reactive extrusion uses a compounding extruder to cause the chemical or the structural modification of polymers. Twin screw compounding process improvement involves multiple facets namely, proper screw design, screw speed, feed rate, extruder barrel temperatures, power consumption in a given heating/cooling zone, feedstock temperature/moisture level entering the extruder, water inlet/outlet temperatures at the feed housing, vent port vacuum levels, ambient temperature/relative humidity.
The co-rotating twin screw extruder comprise with two symmetrical screws driven by motor either directly or indirectly in the barrel casing. The two screws can rotate synchronously in the same direction, either clockwise or counterclockwise. The screw surface set with alternating screw flight.