Keeping Extrusion Blow Moulding Requirements Separate from PET Blowing
Extrusion blow moulding forms a hollow parison from melt before closing the mould and inflating it. Two-stage PET stretch blowing starts with a preform. Process settings and equipment claims should not be transferred between these routes.
Describe the intended container
Identify the polymer, geometry, neck, handle features and required package properties. For extrusion blowing, material distribution and trimming requirements are part of the manufacturing assessment. A PET-preform blower catalogue does not establish extrusion capability.
Evaluate the complete production result
Inspect dimensions, wall distribution and the functional tests needed for the container. Include downstream finishing and rejected material in output calculations. Use the appropriate machine and material documentation for any process adjustment.
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