Shop-Floor Defect Atlas & Troubleshooting Matrix

Batch-to-Batch Viscosity Drift

Mixing

Visual Symptoms Inconsistent Mooney viscosity across consecutive batches processed under identical master recipes.

Root Causes Weighing errors on polymers or fillers, variations in raw material grade, or inconsistent dump temperatures.

Corrective Actions Calibrate load cells on automatic weigh scales, enforce strict raw material lot controls, and audit internal mixer temperature loops.

Batch-to-Batch Viscosity Drift

Mixing

Visual Symptoms Inconsistent Mooney viscosity across consecutive batches processed under the same formula.

Root Causes Weighing errors on polymers or fillers, variations in raw material grade, or inconsistent dump temperatures.

Corrective Actions Calibrate load cells on automatic weigh scales, enforce strict raw material lot controls, and audit internal mixer temperature loops.

Bead Apex Misplacement / Apex Lift

Tyre Building

Visual Symptoms Apex rubber component shifting or lifting off the bead core during green tyre transfer or shaping.

Root Causes Inadequate green tack, incorrect apex application angle, or worn holding fingers on transfer ring.

Corrective Actions Apply tackifier solvent if necessary, check transfer ring pressure settings, and realign apex guides.

Belt Edge Separation in Green Package

Tyre Building

Visual Symptoms Steel belt plies misaligned or protruding past the tread package boundaries during second stage building.

Root Causes Misaligned belt guide lasers, worn carriage bearings, or incorrect centring on the second-stage drum.

Corrective Actions Recalibrate laser guide systems, service carriage linear bearings, and check drum centring mechanisms.

Shop-Floor Defect Atlas & Troubleshooting Matrix

Batch-to-Batch Viscosity Drift

Batch-to-Batch Viscosity Drift

Bead Apex Misplacement / Apex Lift

Belt Edge Separation in Green Package

Ready to Optimize Your Production?