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Thursday, 11 December 2008 19:07 |
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An extruded parison or tube of heated thermoplastic is positioned between two halves of an open split mold which is then closed to trap the tube. The plastic then expands against the sides of the closed mold via air pressure inserted through a needle protruding into one end of the tube. The mold is opened and the part is ejected. This process has low tool and die costs, rapid production rates and the ability to mold fairly complex hollow shapes in one piece. Click on the links below for more complete information on this process commonly used for making bottles of all types.
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