Double Screw Stretch Film Machine: the Heart of Efficient Packaging Solutions
Release time:
2025-04-19 17:17
What is a double screw stretch film machine?
The double screw stretch film machine is a key piece of equipment in the plastic packaging industry, melting and stretching plastic granules into high-strength film through the synergistic action of twin screws. Its core advantage lies in efficient production and uniform tensile strength, which is suitable for packaging needs in food, logistics, industrial products and other fields. In recent years, with the tightening of environmental protection policies and the rising demand for automation, this equipment has become the first choice for companies to optimise costs and enhance competitiveness.
Technical principle and core components
The double screw stretch film machine adopts a twin-screw extrusion system and completes production through the following steps:
- Raw material treatment: heating LLDPE or LDPE plastic granules to molten state.
- Co-extrusion moulding: the twin screws work together to push the molten plastic and ensure a homogeneous material mix.
- Stretching and shaping: Film thickness and tension are adjusted by means of multi-stage stretching rollers.
- Winding and Packaging: Finished film is slit and packaged by rewinding machine (e.g. stretch film rewinding machine).
Industry Application of Double Screw Stretch Film Machine
- Logistics transport: Winding film protects the goods against moisture and scattering, and reduces transport loss.
- Food packaging: FDA-compliant film extends shelf life and guarantees food safety.
- Industrial field: high tensile strength film is used for heavy machinery fixing, replacing the traditional bundling method.
Performance Comparison: Double Screw Stretch Film Machine vs. Single Screw Machines
Parameter |
Twin Screw Film Stretchers |
Single Screw Machine |
Productivity |
200-400 kg/h |
80-150 kg/h |
Energy consumption ratio |
Low (energy saving 20%-30%) |
Higher |
Film uniformity |
±1% |
±3%-5 |
Applicable raw materials |
Multi-mixed materials |
Single material |
Source: Plastics Today
How to choose a cost-effective double screw stretch film machine?
Define your production needs: Choose a machine based on film thickness, stretch rate, and daily output. For example, a discount stretch film machine is suitable for small and medium-sized businesses to reduce costs and increase efficiency.
Focus on core components:
- Screw material needs to be high temperature and corrosion resistant (e.g., nitrided steel).
- The precision of the temperature control system affects film uniformity.
Integration of ancillary equipment: Combine with a Wintech plastic granulator to achieve raw material recycling and reduce purchasing costs.
Maintenance and Troubleshooting Guide
- Routine maintenance:
- Clean screw residue weekly to prevent carbonation clogging.
- Check the resistance value of the heating coil monthly to ensure stable temperature.
- Frequently Asked Questions:
- Film surface bubbles: raw material moisture content is too high, pre-drying treatment is required.
- Stretch breaks: check synchronisation of stretch roll speed.
Wintech: Customised Double Screw Stretch Film Machine Solutions
As an industry-leading plastics machinery manufacturer, Wintech offers the following services:
- Customised design: Adjust the screw length/diameter ratio (L/D) and die structure according to customer needs.
- One-stop support: from stretch film rewinder to Wintech plastic granulator, covering the whole industry chain equipment.
- After-sales guarantee: 48-hour global response and free operation training.
Case Sharing: After adopting Wintech double-screw stretch film machine, a European logistics company increased packaging efficiency by 40% and reduced annual consumable costs by 150,000 euros.
Conclusion
With its high efficiency and stability, the double screw stretch film machine is becoming the core driving force for the transformation and upgrading of the packaging industry. Wintech's technological innovations and full chain of services help customers to achieve sustainable development goals.
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