Extrusion Introduction An extruder is a common machine in industry ...
Extrusion Introduction An extruder is a common machine in industry ...
Extrusion Introduction An extruder is a common machine in industry ...
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lown film dies, etc. In th<strong>is</strong> lab, we are us<strong>in</strong>g an annular structured tub<strong>in</strong>g die. Note that<br />
the size and shape of the extruded products will not be exactly the same as the size and<br />
shape of the die, because of several reasons: draw down, cool<strong>in</strong>g, swell<strong>in</strong>g and relaxation.<br />
Figure 2. The cross section of the die for tubes.<br />
<strong>Extrusion</strong> L<strong>in</strong>es<br />
For a complete extrusion process, <strong>in</strong> addition to <strong>extruder</strong>, upstream and downstream<br />
equipment <strong>is</strong> needed to produce useful products. The ma<strong>in</strong> equipment of an extrusion l<strong>in</strong>e<br />
<strong>is</strong> res<strong>in</strong> handl<strong>in</strong>g, dry<strong>in</strong>g system, <strong>extruder</strong>, post-shap<strong>in</strong>g or calibrat<strong>in</strong>g device, cool<strong>in</strong>g<br />
device, take-up device, and cutter or saw. The extrusion l<strong>in</strong>e <strong>in</strong> th<strong>is</strong> lab <strong>in</strong>cludes <strong>extruder</strong>,<br />
take-off roller and cool<strong>in</strong>g water trough, which are shown <strong>in</strong> Figure 3.<br />
Air<br />
Take-off roller<br />
Extruder<br />
Cool<strong>in</strong>g water trough<br />
Figure 3. The extrusion l<strong>in</strong>e <strong>in</strong> th<strong>is</strong> lab, <strong>in</strong>clud<strong>in</strong>g <strong>extruder</strong>, take-off roller and cool<strong>in</strong>g<br />
water trough.
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