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Extrusion Introduction An extruder is a common machine in industry ...

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0.7<br />

Ri(z)/Ro(z)<br />

(<strong>in</strong>creas<strong>in</strong>g pi)<br />

pi = 60 Pa<br />

0.6<br />

pi = 0 Pa<br />

0.5<br />

0.0 0.2 0.4 0.6 0.8 1.0<br />

Figure 9. Variation of <strong>in</strong>ner to outer radius ratio for various <strong>in</strong>ternal pressure<br />

Operat<strong>in</strong>g Procedures<br />

General Operations<br />

Start Up<br />

Die<br />

Off On<br />

Zone 3 Zone 2 Zone 1<br />

On Off Auto<br />

On Off Auto<br />

On Off Auto<br />

S D S 3 S 2 S 1<br />

Thermal meter<br />

for each zone<br />

T D T 3 T 2 T 1<br />

Ammeter for<br />

each zone<br />

Screw rotat<strong>in</strong>g speed<br />

15 rpm<br />

Stop<br />

Start<br />

Present temp. of die<br />

325 ℉<br />

Motor<br />

Motor speed<br />

controller<br />

Figure 10. The control panel of the extrusion system.

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