By Natti S. Rao
The common use of huge scale devices for production blown movie, blow-molded articles, flat movie, and extruded pipes necessitates troubleshooting on web site. This ebook offers sensible computational instruments which are utilized simply at the store ground to procure speedy options in those and lots of different parts of polymer extrusion.
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Extra resources for Diagnostics of extrusion processes
247 /1000) 3 +1 Finally, the pressure drop ∆p in the screen from Eq. 33 bar.
17. The aim was to determine the screw geometry best suited for the operating conditions mentioned in Fig. 17. The calculated melting profiles in Fig. 17 show that Screw 5 has the optimal geometry, because complete melting has been attained. This predicted result was confirmed in practice. 17 Determining optimal screw geometry Example 3: Improving the Quality of Melt in an Extruder Used for Extrusion Coating and Laminating This example deals with a screw used by a customer in a coating line for processing PET resin.
14) show, the solids content at the inlet of the mixing device is now low enough to produce a homogeneous melt. The processor obtained acceptable melt quality at the desired output by using the redesigned screw with shearing and distributive mixers, confirming the predictions of the program, as shown in Fig. 15. 16 Screw configuration with shearing and mixing devices Example 2: Determination of the Optimal Screw Geometry from a Given Number of Screws of Different Geometry Used in a Blown Film Process The program TEMPMELT can also be used to select a screw best suited for given operating conditions, among a set of existing screws of varied geometry.
Diagnostics of extrusion processes by Natti S. Rao