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File:Principe etirage soufflage bouteille.svg

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English: Principle of stretching-blow moulding of a bottle:
  1. A preform (rough casting) is placed in the mould by a transfer arm; the stretching rod goes down.
  2. The stretching rod stabilises the preform as the mold closes and the transfer arm goes away.
  3. The rod goes down and pulls the plastic downwards (stretching); in the meanwhile, pressured air (about 5 bar, 72.5 psi) stretches the preform radially (preblow). This ensures the mechanical resistance of the bottle by bi-orientation of the polymer chains.
  4. Blowing (pressured air up to 40 bar, 580 psi).
  5. The air is released; the transfer arm takes the bottle, the mould opens.
  6. The rod goes up back in position, the transfer arms takes the bottle away while a new preform comes.
Français : Principe de l'étirage-soufflage d'une bouteille plastique :
  1. Une préforme est mise en place par une pince de transfert ; la canne d'étirage descend.
  2. La canne stabilise la préforme pendant la fermeture du moule et le retrait de la pince de transfert.
  3. La canne descend et tire le plastique vers le bas (étirage) ; simultanément, de l'air comprimé (environ 5 bar) étire la préforme radialement (présoufflage). Cela assure la résistance mécanique de la bouteille par bi-orientation des chaînes polymères.
  4. Soufflage (pression jusqu'à 40 bar).
  5. La pression est relâchée (dégazage) ; une pince de transfert saisit la bouteille, le moule s'ouvre.
  6. La canne remonte, la bouteille est évacuée tandis qu'une nouvele préforme arrive.
Date
Source Own work
Author Cdang; Samuel Dupré for the advice
 
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Date/TimeThumbnailDimensionsUserComment
current12:20, 9 July 2012Thumbnail for version as of 12:20, 9 July 2012590 × 389 (129 KB)Cdang (talk | contribs) Image corrected
16:16, 10 November 2010Thumbnail for version as of 16:16, 10 November 2010590 × 389 (125 KB)Cdang (talk | contribs){{Information |Description={{en|1=Principle of extrusion-blow moulding of a bottle: # A rough casting is placed in the mould; the blow pipe goes down. # First blowing. # The pipe goes down and pulls the plastic (extrusion). # Second blow. # The pipe goes

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