How Does a 1300 PE Double Winding Blown Film Machine Work? A Step-by-Step Guide

You have a 1300 PE double winding blown film machine. But making high-quality film every day takes more than just pressing a button. You need a reliable, repeatable process.

A double winding machine with 1300mm width gives you high output, continuous winding, and lower material costs. But only if you operate it correctly. Your bottom line directly depends on how well you manage temperature zones, screw speed, bubble stability, winding tension, and shutdown procedures.

In this step-by-step guide, you will learn the exact procedures to start, run, adjust, wind, and stop your 1300mm double winding blown film extrusion machine.

Before you turn on any power, perform this safety and readiness check. It prevents damage, improves film quality, and guards operator safety.

• Check bolts and fasteners — ensure all mechanical connections are tightened properly.
• Verify electrical and air supply — check voltage, air pump, and air valve operation. Inspect all circuits.
• Check gearbox and lubricant levels — verify oil levels in the three-speed reducer; top up as needed.
• Clean all guide rollers — wipe down every roller to prevent any film scratching.
• Check resin moisture — ensure PE resin moisture content stays below 0.3%; remove any contaminants.
• Inspect die head — confirm proper die head installation with a balanced axial centerline.
• Load the resin — fill the extruder hopper with LDPE, HDPE, LLDPE, or recycled material.

Once the pre-start checklist is done, follow these steps to bring your 1300mm double winding blown film machine up to operating temperature and running smoothly.

Turn on the main power switch and activate the control panel. Confirm the emergency stop is disengaged.

Set target temperature zones for the extruder barrel and die head. For LDPE material, a typical range is 135–145°C. Each heating zone must reach its set value and stabilize.

Start the heating system. Once all zones reach their target temperatures, let the machine soak for 10–30 minutes. This ensures uniform heat distribution throughout the barrel and die head. For a long stoppage (e.g., overnight), a 30-minute soak is indispensable.

Set the screw speed to the lowest RPM setting (approximately 10 rpm). Start the main motor and observe the extruder operation. Listen for any abnormal sounds.

As melted resin exits the die head, use a copper scraper to clean off any degraded material. Lubricate the die lip with paraffin wax. Pull the molten tube upward and guide it between the nip rollers. Gently introduce compressed air into the bubble to start inflation. Adjust the air volume until you achieve a smooth, stable bubble with consistent diameter.

The bubble is the most critical part of your blown film process. An unstable bubble produces uneven thickness, wrinkles, and poor mechanical properties.

The air ring supplies cooling air to solidify the molten film. Even a slight imbalance here will cause the bubble to drift and create inconsistent gauge.

• Adjust the air ring gap to achieve uniform airflow around the bubble circumference.
• For 1300mm width machines, a dual‑lip air ring provides better bubble stability.

Use the bubble stabilizing ring to keep the bubble centered and straight. For the 1300mm model, the fold diameter can reach up to 1200mm. Stabilizing rings should be properly sized for your film lay‑flat width.

• Cold air drafts cause bubble wobble. Shield the extrusion area from open doors or air conditioning vents.
• Listen for bubble popping. If the bubble bursts, reduce melt temperature and fan speed, then re‑inflate slowly.

Once the bubble appears stable, you can engage the haul‑off unit and pull the film through the line.

Feed the flattened film through the pinch rollers. Set the traction speed to match the extrusion rate. Gradually increase both screw speed and traction speed together.

The extruder screw speed determines how much melt you produce. The haul‑off speed determines how thin the film becomes. If you pull slower, the film becomes thicker. If you pull faster, the film becomes thinner. For a 1300mm double winding blown film machine, the maximum traction speed is up to 80 m/min. Start at a low speed and speed up only after the film quality stabilizes.

Your 1300mm blown film extrusion line features a double winding system—one of its most powerful productivity benefits. Here is how to use its alternating‑shaft design correctly.

Guide the flattened film from the pinch rollers across the idler rollers and onto the first winding shaft. Wrap the film around the cardboard core several times to secure it.

Configure the double winding unit for your film width and type. Set the winding tension to 5–15 N (depending on film width and thickness). For thinner films (e.g., 0.008 mm), use lower tension to prevent film stretching. For thicker films (e.g., 0.10 mm), slightly higher tension ensures a firmer roll.

Torque motor control provides consistent winding tension throughout the roll build.

The double winding system allows you to change rolls without stopping the extrusion line. One shaft winds while the operator unloads the finished roll from the other shaft.

Properly shutting down your blown film machine protects the screw, barrel, die head, and electrical systems for the next run.

• Turn off the corona treater (if equipped). Shut this down first to prevent electrical damage.
• Reduce main motor speeds — gradually decrease the speed of all main motors to zero.
• Turn off heating — shut off heaters for the die head and extruder barrel.
• Slowly cool the system — run the extruder at low speed to let the barrel and die head cool gradually.
• Shut down peripheral devices — turn off blower fans, traction unit, rotating die head, and winding system.

• Check out [What Is a 1300 PE Double Winding Blown Film Machine?] for a complete overview
• Read [1300 PE Double Winding vs. ABA Blown Film Machine] to pick the right tech for your factory
• Learn best practices in [How to Maintain an ABA Blown Film Machine] to extend service life
• Compare models in [700 vs 900 vs 1300 ABA Blown Film Machine] to match your production scale

 * This guide applies to standard LDPE/HDPE blown film lines, including 1300 PE double-winding and 700/900/1300 ABA co-extrusion models. For custom film formulations or special applications, contact our team for a material test.