What sets us apart
80-120 m/min
Production speed
15%-30%
Capacity increase
15%-25%
Screw energy savings
6+
Biodegradable material compatible
Blown film printing & bag making line
RUIPAI's entire production line integrates film blowing, bag making, printing and granulation, and adopts a highly automated and intelligent control system, which ensures high efficiency, precision and stability of the production process, significantly increasing production capacity and reducing production costs.
Blown film machine
Bag making machine
Printing machine
Pelletizer
With high production capacity, adapted to a wide range of production needs, ensuring production efficiency and film quality.
It is capable of quickly producing plastic bags of all sizes, providing a stable and efficient production solution.
Enables fine printing for a wide range of plastic bags and packaging films.
Provides the plastics industry with consistent pellet production thanks to its efficient mixing and pelletizing technology.
Rejuvenate your old equipment
Specialized screw designs for new materials (e.g., biodegradables), improved plasticizing efficiency, reduced energy consumption, reduced degradation, repair of wear and tear, upgraded materials (abrasion and corrosion resistance).
How to Optimize a Blown Film Printing & Bag Making Line

How to install a film blowing machine?

Proper installation boosts output by 15-20%, avoids die misalignment, and extends equipment life. Follow our field proven 4 stage process.

1
Base & Platform Mounting

Anchor the machine to a solid foundation.

  • 1st: Fix four legs to concrete base using M20 anchor bolts
  • 2nd: Install short 4 support legs (leveling feet)
  • 3rd: Put the operator platform in place, secure with lock nuts
2
Traction & Extruder Assembly

Assemble downstream units and prepare alignment.

  • 4th: Install the traction unit (nip rollers & tower)
  • Connect extruder discharge adapter to die head
  • Temporary tighten all coupling bolts for fine tuning

Follow the numbered order: 1st(legs) → 2nd(short legs) → 3rd(platform) → 4th(traction). Correct order prevents structural twist.

3
Centerline Alignment (Critical)

Precision alignment of die head, extruder, and winder.

  • 5th: Keep extruder – winder center on one line (±1 mm tolerance)
  • 6th: Make sure the center of die head and traction line are perfectly aligned
  • Use laser alignment tool or piano wire method for verification
4
Electrical & Commissioning

Connect power, cooling, and perform test run.

  • Main power connection (3-phase + grounding check)
  • Cooling water circuit: inlet/outlet pressure test
  • No load test → temperature calibration → air ring & bubble check

Extruder axis, die head center and traction line must be co-linear. Misalignment causes uneven film gauge and bubble instability.

  • Use dial gauge & laser tracker
  • Recheck after thermal expansion (preheat zone)
Figure A - Mechanical assembly sequence
Figure B - Centerline alignment (5th & 6th)

Installation site checklist

  • Floor flatness ≤ 2mm per meter
  • Load capacity: ≥ 3.5 tons/m²
  • Ceiling height: min 8 m (for bubble tower)
  • 3-phase power: 380V / 50-60Hz, stable voltage
  • Cooling water flow ≥ 60L/min (≤25°C)
Leading in biodegradable technology
Experienced in complete line integration
Compatible with new materials
Customized mid- to high-end blown film machines
Biodegradable plastic films and bags for a variety of industries
Degradable Film Line Solution:
integrates the special requirements and technical points of blown film, printing, bag making and pelletizing.
High-performance packaging film solutions:
Solutions for high-barrier, high-transparency, high-toughness and other needs.
Industrial/Agricultural Film Solutions:
Solutions for wide width, thick film, weatherability,
Shopping Bags
Food Packaging Bags
Clothing Packaging Bags
Vest Bags

Have More Detailed Customisation Needs?

With more than 20 years of experience in manufacturing blown film machines, we can meet your special customization needs!
Contact us

We Can Offer :

Environmentally friendly materials

Integrated production lines

Maximising your return on investment

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