Extrusion processing capability: which product is NOT typically manufactured by plastic extrusion (continuous profile process)?

Introduction / Context:
Extrusion forces molten polymer through a die to create continuous profiles of constant cross-section. Recognising which products suit extrusion versus injection moulding helps avoid design and manufacturing errors.

Given Data / Assumptions:

• Extrusion excels at continuous shapes: pipes, tubes, filaments, sheets, films, and profiles.
• Buckets are discrete, hollow articles with complex geometry and non-uniform walls.

Concept / Approach:
Buckets require closed-mould cavity filling and cooling to a fixed 3D shape—classic injection moulding (or sometimes blow moulding for certain pails). Extrusion cannot form complex, non-constant cross-sections in a single step.

Step-by-Step Solution:
Match manufacturing method to geometry.Continuous constant cross-section → extrusion (filaments, pipes, tubings).3D discrete article (bucket) → injection moulding, not extrusion.

Verification / Alternative check:
Processing guides list extrudates as profiles and injection moulded parts as discrete items like housings and containers.

Why Other Options Are Wrong:
Filaments, pipes, tubings: classic extrusion outputs.

Common Pitfalls:
Confusing extrusion blow moulding (used for bottles) with pure extrusion; blow moulding still begins from an extruded parison but needs a moulded step for the final shape.

Final Answer:
Buckets