FunctionSurface sizing / film coating
Key partsApplicator nozzle / metering rod / blade beam / backing roll
FocusSeals, beam straightness, gap zero
1 · Equipment Overview
| Function | Surface coating and film-transfer sizing. |
| Coating | Jet application + blade / metering-rod metering. |
| Film sizing | Sizing solution applied via transfer-roll film. |
| CD control | Zoned profile-rod lateral adjustment. |
| Common failures | Seal leakage, beam deflection, scale build-up. |
2 · Maintenance Process
Drain & flushDrain coating colour / sizing solution; warm-water circulation flush of chambers and piping.
DisassemblyWithdraw blade beam and applicator beam; remove seals, hoses and metering rods.
De-scalingManual / high-pressure removal of dried coating from lips, roll surface and beams.
InspectionBlade-beam straightness; backing-roll roundness and crown; bearing clearances.
Seal renewalReplace end seals, seal strips and aged hoses; leak-test after refit.
Beam repairStraighten / grind blade beam to restore straightness and blade datum.
Roll surfaceGrind or recover backing roll; restore crown and surface condition.
Zero calibrationCalibrate profile-rod zero; align blade tip angle.
Annual serviceVerify hydraulic valve blocks, re-grease lube points, re-check tightening torques.
Functional trialRun application circulation, blade open/close movement and CD profile walk-through.
3 · Key Process Photos
4 · Acceptance & Handover
Chambers and end seals hold pressure with no leakage; blade-beam straightness and blade zero calibrated; backing-roll crown and roundness to drawing; CD profile walk-through stable without local deviation; hydraulic/pneumatic movements synchronised. Delivered with seal-change records, straightness and zero-calibration records.