How to Choose the Right Stretch Film Machine for Your Production Capacity?
Release time:
2025-06-24 11:56
Selecting the appropriate stretch film machine directly determines the operational efficiency and return on investment of the packaging line. This article will systematically analyse the core indicators for selecting a stretch film machine, covering production capacity calculation, film material compatibility, and cost control strategies, to help you precisely match your production needs.
1. Production Capacity Assessment: Three-Step Precise Calculation
1. Basic Production Capacity Calculation
- Average Daily Output: Record the peak output over 30 consecutive days during the peak season and add a 20% buffer design
- Example: If the average daily shipment is 5,000 boxes, select equipment with a production capacity of ≥6,000 boxes/day
- Packaging Speed: The average wrapping time per item (typically 3–8 seconds) determines the theoretical production capacity
- Formula: Hourly capacity = 3,600 seconds ÷ single-item wrapping time × efficiency factor (0.85)
2. Film Material Compatibility
- Film Thickness Range: Standard models support 15–25 μm film material; custom models can handle 8–50 μm specialty film
- Film roll specifications: Standard models support Φ200 mm × 500 mm film rolls; large-scale production lines require Φ300 mm × 800 mm compatible design
- Interlocking recommendation: Pair with a stretch film rewinder to pre-process film rolls, reducing production line downtime due to material changes
II. Equipment Type and Production Capacity Matching Comparison
Equipment Type |
Applicable Production Range |
Wrapping Speed |
Film Consumption Control Rate |
Investment Cost (Ten Thousand Yuan) |
Semi-automatic turntable type |
<1000 boxes/day |
30-40 pieces/hour |
±15% |
3-8 |
Fully automatic shuttle type |
1,000–5,000 boxes/day |
80–120 pieces/hour |
±8% |
15–30 |
Robotic pre-stretch system |
>5,000 boxes/day |
200+ pieces/hour |
±5% |
50+ |
(Data compiled from the German Packaging Journal and the China Packaging Machinery Association's 2025 Annual Report)
III. Key Selection Technical Parameters
1. Pre-stretching Performance
- Mechanical pre-stretching: General-purpose 250% stretch rate, suitable for conventional PE film
- Electric pre-stretching: Precision control up to 300%+, reducing the overall cost of the stretch film machine by 15%
2. Energy-saving Optimisation Configuration
- Servo motor system: 40% more energy-efficient than traditional pneumatic systems, with power consumption per ton of packaging ≤2.1 kWh
- Intelligent tension control: Reduces film material breakage losses and improves roll yield to 98%
4. Coordinated Strategies for Supporting Equipment
Upstream Processes:
- Film defect detection instrument (reduces scrap rate by 23%)
- When operating in conjunction with the cast film extrusion line, film thickness tolerance must be calibrated to ≤±5μm
Post-Processing Integration:
- Automatic Palletising Robot (speed matching error <0.5 seconds)
- Recommended to review the plastic granulator waste film recycling solution to achieve material closed-loop recycling
5. Investment Return Calculation Model
Cost Items |
Semi-automatic model |
Fully automatic model |
Equipment purchase cost |
60,000 yuan |
250,000 yuan |
Cost per ton of packaging film |
38 yuan |
32 yuan |
Labour cost (two-shift system) |
96,000 yuan/year |
36,000 yuan/year |
Investment payback period |
14 months |
22 months |
(calculated based on an average of 3,000 boxes per day and a film price of 12 yuan/kg)
Conclusion: Three-step method for optimising model selection
- Verify actual production capacity: Require suppliers to conduct on-site testing under peak load conditions
- Film material compatibility testing: Bring your own film rolls for stretch rate verification
- Full-cycle cost calculation: Focus on comparing the balance point between stretch film machine price and film consumption savings
Related News
undefined
Related Products
