Melting capacity

Figure 8.17 Extruder schematic showing location of the extrudate cross-sectional views for the melting capacity and mixing experiments...

Process exceeded the melting capacity of the screw Solid polymer fragments in the extrudate 13.4.2... 

Extrusion processes are often rate limited by motor power or torque, discharge temperature, or the melting capacity of the screw. Other root causes associated with the design of the screw can limit rates as shown in previous sections. The problems, however, are typically associated with other defects such as flow surging or resin degradation. Chapters 11 and 12 discuss process defects associated with resin degradation and flow surging, respectively. Rate limitations due to inadequate motor power and torque are common problems for commercial plants. Two case studies are presented in the next sections that show rate limitations due to the lack of torque and motor power. 

Mount, E.M., III, Evaluation of the Melting Capacity of Three Single Screws, SPE ANTEC Tech. Papers, 53, 400 (2007)... 

The melting capacity of this geometrical configuration can easily be calculated from Eqs. 5.8-11 and 5.8-1. 

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