Thursday, December 23, 2010

Extrusion Blow Molding




Capabilities of blow molding

Shapes: Thin-walled:
CylindricalThin-walled:

CubicThin-walled: Complex
Part size: Envelope: Up to 105 ft³
Materials: hermoplastics
Surface finish - Ra: 250 - 500 μin
Tolerance: ± 0.04 in.
Max wall thickness:0.015 - 0.125 in.
Quantity: 100000 - 1000000
Lead time: Days
Advantages:
Can form complex shapes with uniform wall thickness

  • High production rate
  • Low labor cost
  • Little scrap generated

Disadvantages:
Limited to hollow, thin walled parts with low degree of asymmetry

  • Poor control of wall thickness
  • Poor surface finish
  • Few material options
  • High tooling and equipment cost

Applications:
Bottles, containers, ducting

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