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Athlone Extrusions Website - Part Warpage
Part Warpage

Problem:

Part Warpage

Possible Cause:

(1) Part too hot when removed
(2) Poor mould design
(3) Uneven part cooling
(4) Poor material distribution

Suggested Course of Action:

  • Increase cooling cycle; add more cooling capability by adding fans and water mist, use of water cooled moulds ribs etc.
  • Increase mould temperature and/or temperature uniformity
  • Check mould cooling system
  • Check for uneven heating of sheet
  • Use plug assist or pre-stretch for deep draw