Grooved feed

Peiffer [52, 53] developed an empirical relationship between the geometry of the grooved feed section and rate as follows ... 

Wortberg, J., Screw and Barrel Design for Grooved Feed vs Smooth Bore Extruders, SPEANTEC Tech. Papers, 48, 80 (2002)... 

Figure 3.7 Typical conventional and grooved feed extruder pressure distributions in a 45 mm diameter extruder.

Schematic diagram of the grooved feed section of a single screw extruder.

Figure 3.9 Screw and die characteristic curves for a grooved feed 45 mm diameter extruder for PE-LD.

Figure 3.12 Throughput for conventional and grooved feed extruders.

Friction between solid polymer particles or pellets (termed internal friction). This also influences conveying as well as hopper flow, especially in grooved feed zones. 

Grooved Feed Extrusion, Davis Standard Keystone Review, Sept. 1988. 

Figure 3 J Grooved feed throat used for high output systems...

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