Blow Moulding
Figure 4:
Blow molding of plastic containers. (Counterclockwise from top) A molten
polymer is extruded into a hollow, tube-shaped parison. A split mold is closed
around the parison, which is expanded against the sides of the mold by a stream
of air. Once the plastic has solidified, the mold is opened and the shaped
bottle released.
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Moulding Extrusion