Dalian Film Blower Long Service Maintenance

Scientific Maintenance of Dalian Film Blowing Machines: Key Points for Extended Service Life

Dalian is a major northern plastic processing hub, with film blowers as core packaging film production equipment. The coastal humid, salt-laden atmosphere demands location-specific maintenance, boosting equipment lifespan by over 30%, cutting breakdown losses and upkeep costs.

Daily Cleaning & Environmental Control (Foundation)

Clear residual melt in die runners after daily shutdown to prevent carbon buildup from high heat that damages precision channels. Purge screw and barrel with pure PP resin at low speed for 10 minutes to eliminate leftover material and cross-contamination/wear.

Counter local salt fog and high humidity: keep workshops ventilated and dry; fit dehumidifiers on electric control cabinets. Wipe exposed metal parts with dry cloth daily, coat frames and bearing housings with anti-rust oil monthly to stop rust and jamming.

Maintenance of Core Components

Die (core component): Hot-clean after each material switch. Heat die to PE processing temperature (180–220°C), scrape carbon deposits gently with copper scrapers—no hard metal tools to avoid runner scratches. Replace die sealing rings every 3 months to prevent melt leakage.

Screw & barrel (high-wear parts): Heavy loads for high-strength film production require clearance measurement every six months; repair promptly if gap exceeds 0.2 mm. Avoid long-term overloading to prevent screw bending.

Winding system: Clean tension rollers weekly to remove film scraps; calibrate winding shaft parallelism quarterly to stop wrinkling and uneven rolls.

Standardized Lubrication

High humidity easily emulsifies lubricants:

High-speed bearings: High-temperature grease, replenish every 300 hours (fill 1/3 of bearing cavity).

Gearboxes: Medium-duty industrial gear oil, full oil change with debris cleaning and emulsion check every 5000 hours, add desiccants as needed.

Slide rails: Special rail oil every 200 hours to prevent poor die opening/closing from abrasion.

Routine Inspection for Electric & Safety Systems

Moisture causes terminal oxidation and degraded motor insulation: Tighten terminals and test motor insulation resistance monthly; dry equipment if resistance drops below 0.5 MΩ.

Test emergency stop and overload protection weekly for responsiveness; calibrate temperature and pressure sensors monthly to prevent poor plasticization and malfunctions from parameter drift.

Fine-tuned full-process maintenance covering cleaning, critical parts, lubrication, electrics and inspections, adapted to Dalian’s coastal climate, enables stable machine operation for 5–8+ years, supporting corporate cost reduction and efficiency gains.