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Shape of the Extrusion Molding Screws

Table 15 and Fig. 15 show examples of the screw shapes of Nylon-MXD6 used for extrusion molding.

Table 15: Examples of Extrusion Molding Screws Shapes Used for Nylon-MXD6
Category Extruder(mmφ)
30 40
Type Full-flight Full-flight
L/D 24 26
Compression Ratio 2.4 3.4
Pitch(mm) 30 40
Feed Area
(mm)
  360 520
No. of Flights 12 13
Groove Depth
(mm)
5.4 7.0
Compression Area
(mm)
  90 120
No. of Flights 3 3
Measurement Area
(mm)
  270 400
No. of Flights 9 10
Groove Depth
(mm)
1.9 1.7

Breaker plate: bore 2mm
Screen :60/100/60mesh

Fig. 15 Screw Shape

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