Hot Melt Coating Machine Maintenance Schedule (For Trasy Enterprises Machines)

1.       Daily Maintenance: Performed by: Operator at end of every shift

Task	Description	Purpose
Clean coating head & tank	Remove residual adhesive from melter, slot die/nozzle, filters & rollers using recommended cleaning tools or solvent.	Prevent adhesive carbonization & nozzle blockage.
Check temperature readings	Compare set temperature vs. actual on all zones (tank, hose, die).	Maintain correct viscosity & coating quality.
Inspect hoses & fittings	Look for leaks, cracks, or exposed wires.	Prevent adhesive leakage & safety hazards.
Lubricate moving parts (lightly)	Apply thin oil film on exposed shafts, guide rods, or chains (if dry).	Reduce wear & ensure smooth motion.
Check web path alignment	Verify substrate runs straight through coating head.	Avoid coating unevenness & web damage.
Record machine log	Note production run time, grade of adhesive used, temperature, any anomalies.	Build preventive maintenance history.

2.       Monthly Maintenance: Performed by: Maintenance / Electrical team

Task	Description	Purpose
Test heater zones & thermocouples	Measure response times, verify correct temperature calibration.	Ensure uniform heating & process stability.
Safety system inspection	Check E-stop, limit switches, thermal cut-offs, guards & alarms.	Operator safety.
Check coating width & die lips alignment	Inspect for uniformity of coating layer. Clean die lips thoroughly.	Maintain coating precision.
Grease bearings & mechanical joints	Use manufacturer-recommended grease.	Prevent bearing wear & noise.
Review operating log	Analyze temperature trends, downtime causes, and plan improvements.	Preventive maintenance planning.

3.       Yearly Maintenance, Performed by: Trasy Enterprises Authorized Service Personnel

Task	Description	Purpose
Adhesive compatibility check	Inspect tank & hoses for residue or reaction with adhesive type.	Avoid material degradation.
Complete system calibration	Calibrate all heaters, sensors, pressure gauges, and load cells.	Ensure long-term precision.
Overhaul of mechanical assemblies	Inspect and recondition coating head, rollers, and frame.	Restore machine to factory performance.
Software / PLC check & backup	Update firmware or PLC logic if necessary. Backup parameters.	Maintain control reliability.
Motor & gearbox inspection	Check motor amperage, vibration, and gearbox oil (if applicable).	Ensure power transmission efficiency.
Roller & coating head alignment check	Verify parallelism using alignment tools.	Prevent coating streaks & uneven layers.
Inspect control panel	Clean, tighten, and calibrate sensors, PID, and PLC.	Stable control & communication.
Replace worn parts	Replace seals, nozzles, filters, and gaskets.	Prevent leaks & maintain quality.

General Tips from Trasy Enterprises

• Always use recommended hot melt adhesives compatible with machine type (slot die / roller coater / spray).

• Keep melter lid closed to avoid contamination.

• Never use metal tools to scrape inside tank; use wooden or Teflon scrapers.

• During long shutdowns, purge system completely and fill with Trasy-approved cleaning compound.

• Maintain room temperature (20–30°C) and humidity below 60% for adhesive consistency.