Dual Stage Extrusion Line - Chinaprice: contact company for price
in this sequence: solid conveying, melting, compounding, degassing and
extruding. Normally, each step requires different screw structure,
different operating conditions, such as RPM, barrel heating temperature,
material pressure, etc. But as a matter of fact, all these steps perform
through the same screw shaft. That is, the rotary speed of screw is same
and the temperatures will influence on each step. All these affect the
pressure build-up and energy input which are so far not possible to be
realized for every inpidual step.
For instance, in order to increase the output of single screw extruder, in conveying part, we would use the screw structure like this: deeper groove depth, longer screw distance, higher RPM, lower die pressure and lower extruding temperature. But higher RPM means faster conveying speed and this would make a negative effect on melting. Sometimes for better mixing, we would use kneading elements which can provide better compounding as well as higher temperature. If the material being processed is heat-sensitive, this kneading element may get it degraded. The same problem would happen on a twin screw extruder.
- Posted By: Nanjing Gorray Extrusion Equipment LLC
- Phone: 13813842859
- Address: Lishui Econmic Development Zone,Najnjing,China, Nanjing, China
- Website: http://www.gorraychina.com
Published date: June 20, 2013 -
- Business Description: involved in international trade import export of goods, products, and services
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