Double Die-Head Blown Film Machine
Blown film extrusion line featuring one extruder driving twin die heads for PE film production, saving 40% factory space
The double die-head blown film machine is an innovative solution designed for high-efficiency PE film production. Its core design concept is one extruder driving two die heads, which breaks the output limitation of conventional single-die systems. Equipped with high-quality wear-resistant and corrosion-resistant screw and barrel assemblies, the line ensures stable and precise processing of LDPE, HDPE, and LLDPE materials.
By enabling the simultaneous production of two different film specifications, the blown film machine significantly increases output while reducing overall energy consumption, labor input, and factory floor space requirements. It offers an optimal balance between productivity, cost efficiency, and operational stability.
The produced films are suitable for T-shirt bags and flat bags, and are widely used in food, apparel, textile, and industrial packaging. This machine provides a cost-effective and reliable film production solution for manufacturers seeking higher capacity and lower operating costs.
Food packaging
flat bags used for snacks, bread, and fresh food packaging.
Apparel and textile packaging
T-shirt bags or flat bags for garments and fabrics.
Daily consumer goods
T-shirt bags commonly used in supermarkets and convenience stores.
Industrial applications
flat bags for packaging small industrial parts and tools.
Product parameters
| Item | |
|
| Film material | LDPE/HDPE/LLDPE | LDPE/HDPE/LLDPE |
| Film width range | 200-600mm | 300-800mm |
| Film thickness range | 0.008-0.1mm | 0.008-0.1mm |
| Tensile strength (MD / TD) | ≥15MPa/≥12MPa | ≥15MPa/≥12MPa |
| Elongation at break (MD / TD) | ≥500%/≥400% | ≥500%/≥400% |
| Light transmittance | ≥90% | ≥90% |
| Finished product type | T-shirt bags, flat bags | T-shirt bags, flat bags |
Equipment parameters
| Item | |
|
| Extruder screw diameter | Ø65mm | Ø75mm |
| Screw L/D ratio | 30:1 | 30:1 |
| Main motor power | 37kW | 45kW |
| Die diameter | Ø60mm | Ø80mm |
| Production capacity | 80kg/h | 90kg/h |
| Average energy consumption | 45kW/h | 55kW/h |
| Machine dimensions (L×W×H) | 4.8×2.2×4.3m | 5.2×2.6×4.5m |
| Machine weight | 2.5t | 3.0t |
| Screw & barrel material | Alloy steel, nitrided (surface hardness≥HV900) | Alloy steel, nitrided (surface hardness≥HV900) |
| Control system | PLC+touch screen (dual-head synchronous control, parameter monitoring and fault alarm) | PLC+touch screen (dual-head synchronous control, parameter monitoring and fault alarm) |
| Cooling method | Dual cooling air rings (adjustable air volume) | Dual cooling air rings (adjustable air volume) |
Raw material handling system
Material hoppers combined with automatic feeding units ensure stable and continuous raw material supply.
Extrusion system
An alloy nitrided screw, main drive motor, and temperature control system work together to ensure efficient melting and stable material delivery.
Dual winding system
Two winding units operate simultaneously to ensure neat, consistent, and synchronized film winding.
Electrical control system
A PLC combined with a touchscreen integrates synchronized dual-die control, real-time monitoring, and fault diagnostics, enabling fully automated operation.
- High output efficiency is achieved by using a single extruder to drive two die heads, enabling a maximum daily output of up to 2.16 tons, which is over 80% higher than conventional systems.
- Operating costs are significantly reduced by saving approximately 30% energy, 50% labor, and 40% factory space, with one operator able to manage one complete line.
- The double die-head line offers excellent durability, with screw service life exceeding conventional designs by more than 60%, reducing maintenance frequency and cost.
- Operation is user-friendly, with PLC and touchscreen control allowing operators to become fully independent after short-term training.
- Stable and reliable production is ensured through independent twin die-head operation and an integrated fault alarm system, achieving a product qualification rate of ≥99.5%.
- The blown film line supports a wide processing range, covering film widths of 200-800mm and thicknesses of 0.008-0.1mm, meeting diverse packaging requirements across multiple industries.