Leakage gaps

Tangential extruders are often used in situations where the elasticity of the material would pose problems in the leakage gaps. This type of extruder is often found in the rubber industry. 

The throughput through the different leakage gaps partly consists of drag flow and partly of pressure flow. The pressure flow in its turn, is a... 

Figure 2.8 Leakage gaps in a counterrotating, closely intermeshing twin-screw extruder (from Ref. 4).

The equations for the different leakage gaps are mathematically simple (4). The variables are defined in Fig. 2.13. For the tetrahedron gap in a counterrotating twin-screw extruder an empirical equation exists ... 

The throughput through the different leakage gaps consists partly of drag flow and partly of pressure flow. The pressure flow, in its turn, is a consequence of the internal pressure build-up in the chambers and of the pressure that is built up at the die, resulting for the leakages in ... 

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