Tyre manufacturing: which forming/curing method is classically used to produce pneumatic tyres after green-tyre building?

Introduction / Context:Tyre production involves compounding, calendaring, bead and ply preparation, green-tyre building, and finally moulding/vulcanisation. The final shaping and curing step defines tread pattern and mechanical performance.

Given Data / Assumptions:

• We refer to conventional pneumatic tyre manufacture.
• “Green” tyres (uncured assemblies) are placed in a heated mould and cured under pressure.

Concept / Approach:The curing step is typically done in a press (or curing bladder) that compresses the green tyre against a mould while heat induces sulphur vulcanisation. This is essentially compression moulding/press vulcanisation. Injection moulding and rotational moulding are used for some thermoplastics or special elastomeric parts, not standard tyre curing. Extrusion forms treads/sidewalls as semi-finished profiles, not complete tyres.

Step-by-Step Solution:Identify the final curing/shaping step for tyres.Match it to compression moulding in heated presses with bladders.Eliminate other processes that do not apply to complete tyres.

Verification / Alternative check:Tyre plant process diagrams show press curing with moulds/bladders as the defining step.

Why Other Options Are Wrong:Injection/rotational moulding: not used for typical tyre production.Extrusion: preforms only; not final tyre.

Common Pitfalls:Equating extrusion of tread profiles with the entire tyre manufacturing method.

Final Answer:Compression moulding (press vulcanisation)