Comparison Injection Blow Molding to Extrusion

Blow Molding


Injection Blow Molding

  • Automatic producing, no need deflashing and trimming.
  • Uniform wall thickness
  • Bottle weight tolerance of 1%
  • Faster cycle time / more cavities
  • Precise, stable and unity forming neck. Suitable for making
        containers in clean room and factory.
  • Suitable for PET and PETG
  • Unity-forming without seam, high hardness.
  • Stable operation, no need to adjust parameter

    Extrusion Blow Molding

  • Scraps during production, cost of wasting materials. 
  • Wall thickness variation
  • Bottle weight tolerance of 3%
  • Slower cycle time / less cavities
  • Pollution caused. No stable neck size, cutting neck process is
        necessary. Suitable for factory.
  • Only for PETG
  • Not unity-forming, visible Parting Line, Lower hardness
  • Need to adjust parameter during production.

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