Influence of the Processes Parameters on the Properties of The ...
Influence of the Processes Parameters on the Properties of The ...
Influence of the Processes Parameters on the Properties of The ...
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Chapter 4.<br />
Experimental Procedures and Protocols for Analyses<br />
also used during <str<strong>on</strong>g>the</str<strong>on</strong>g> pellet forming process. Without using polyimide film some <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> polylactides stick <strong>on</strong><br />
<str<strong>on</strong>g>the</str<strong>on</strong>g> stainless steel plunger at elevated temperature. Moreover to make multiple pellets in <strong>on</strong>e batch <str<strong>on</strong>g>the</str<strong>on</strong>g> pellets<br />
are separated by polyimide.<br />
Body<br />
Evacuable base<br />
Polyimide<br />
film<br />
Polyimide<br />
circular disk<br />
Metallic<br />
pellet<br />
Polymer<br />
powder<br />
Plunger<br />
Set <str<strong>on</strong>g>of</str<strong>on</strong>g> pellets<br />
(a<br />
O Ring Kit<br />
Polyimide<br />
film<br />
Metallic<br />
pellet<br />
(b)<br />
(c)<br />
(a) Evacuable pellet die accessories (b) Assembled pellet die (c) Schematic representati<strong>on</strong> <str<strong>on</strong>g>of</str<strong>on</strong>g> assembled<br />
mould (d) Cross secti<strong>on</strong>al view <str<strong>on</strong>g>of</str<strong>on</strong>g> multi-pellets/batch.<br />
Figure 4.7: Schematic diagram to produce pellets in semi-industrial quantities.<br />
1.4.2 Procedure to Prepare Pellets<br />
<strong>The</strong> procedure to process pellets is described stepwise as under shown in Figure 4.8.<br />
A<br />
B<br />
C D E<br />
F<br />
Insert <str<strong>on</strong>g>the</str<strong>on</strong>g> bottom<br />
pellet with <str<strong>on</strong>g>the</str<strong>on</strong>g> polished<br />
side facing UP.<br />
Pour your powder<br />
into <str<strong>on</strong>g>the</str<strong>on</strong>g> bore <str<strong>on</strong>g>of</str<strong>on</strong>g><br />
<str<strong>on</strong>g>the</str<strong>on</strong>g> die barrel.<br />
Level <str<strong>on</strong>g>the</str<strong>on</strong>g> sample in <str<strong>on</strong>g>the</str<strong>on</strong>g><br />
bore and wipe<br />
<str<strong>on</strong>g>of</str<strong>on</strong>g> any spilled powder.<br />
Insert <str<strong>on</strong>g>the</str<strong>on</strong>g> top pellet into<br />
<str<strong>on</strong>g>the</str<strong>on</strong>g> die barrel with <str<strong>on</strong>g>the</str<strong>on</strong>g><br />
shiny side DOWN.<br />
Put <str<strong>on</strong>g>the</str<strong>on</strong>g> plunger into<br />
<str<strong>on</strong>g>the</str<strong>on</strong>g> die barrel <strong>on</strong> top <str<strong>on</strong>g>of</str<strong>on</strong>g><br />
Center <str<strong>on</strong>g>the</str<strong>on</strong>g> assembled<br />
<str<strong>on</strong>g>the</str<strong>on</strong>g> bottom pellet pellet die <strong>on</strong> <str<strong>on</strong>g>the</str<strong>on</strong>g><br />
platform in <str<strong>on</strong>g>the</str<strong>on</strong>g> press.<br />
J<br />
I<br />
H<br />
G<br />
K<br />
Disassemble <str<strong>on</strong>g>the</str<strong>on</strong>g><br />
pellet die.<br />
Invert die assembly, press down gently <strong>on</strong><br />
<str<strong>on</strong>g>the</str<strong>on</strong>g> pist<strong>on</strong>, bottom pellet and <str<strong>on</strong>g>the</str<strong>on</strong>g> pressed<br />
sample disk should pop out.<br />
M<br />
Remove <str<strong>on</strong>g>the</str<strong>on</strong>g> die base.<br />
Pump <str<strong>on</strong>g>the</str<strong>on</strong>g> handle<br />
to raise <str<strong>on</strong>g>the</str<strong>on</strong>g><br />
lower platform<br />
Irregular disk<br />
L<br />
Carefully clean all <str<strong>on</strong>g>of</str<strong>on</strong>g><br />
<str<strong>on</strong>g>the</str<strong>on</strong>g> parts with cott<strong>on</strong><br />
tipped applicators<br />
Plane and<br />
cleaned disk<br />
Gloves<br />
Cleaning cutter<br />
Figure 4.8: Schematic representati<strong>on</strong> to process pellets by using hydraulic press.<br />
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