Comparison Injection Blow Molding to Extrusion
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.