A Southeast Asian door and cabinet maker producing 1,200 units daily across two shifts faced 15% transit damage, 40-unit/hour manual throughput, and peak-season bottlenecks. After evaluating three automated solutions, they selected a shrink packer for standard doors and a horizontal stretch wrapper for glass-insert panels. Within 90 days, damage fell to 2.1%, throughput doubled to 85 units/hour, and payback reached 11 months.
🛠️ Client Background
The client is a mid-size architectural door and cabinet manufacturer in Southeast Asia, producing approximately 1,200 units per day across two shifts. Their product range includes standard flush doors (2000×800×40 mm), glazed panel doors, and laminated cabinet panels (up to 2400×900×18 mm). Before automation, all finished goods were hand-wrapped with shrink or stretch film, requiring six workers per line. Seasonal order spikes forced overtime and temporary labor, raising packaging cost per unit. The client sought a scalable, consistent method that could handle mixed sizes without slowing production.
The door sizes ranged from **1800×600×35 mm (minimum) to 2500×1000×50 mm (maximum), with occasional oversized panels. The target throughput was ≥80 units per hour per line—double the manual capability. Baseline data from client shift records showed 40 units/hour throughput, 0.8–1.2 kg film consumption per door, 15% transit damage rate, and six packers per shift.
🏗️ Challenge
Manual wrapping created three interlinked problems: inconsistent film tension, high material waste, and a 15% transportation damage rate that triggered customer complaints and returns. Workers often applied excessive film (cost overrun) or insufficient film (damage). The irregular shape of door handles and panel edges slowed hand-wrapping further. During peak months, the company lost 2–3 days of output waiting for packaging capacity to catch up. Moreover, the manual process could not produce a moisture-sealed package, which mattered for export containers.
| Pre-automation baseline metrics: | Metric | Value | Source |
|---|---|---|---|
| Throughput per line | 40 units/hour | Client shift records | |
| Film consumption per door | 0.8–1.2 kg | Random audit | |
| Damage during transit | 15% | Warranty claims | |
| Direct labor per shift | 6 packers | HR roster |
📈 Solution Design
Based on the client’s door mix, budget, and uptime risk tolerance, we outlined three machine solutions—a full-automatic shrink packer (Model S), a horizontal stretch wrapper (4- or 6-sided), and a vertical stretch wrapper. Each has specific use cases and performance profiles. The selection is conditional; no single machine fits every door factory. The core models were evaluated using sample doors from the client.
Solution 1 – Full-automatic shrink packaging (Model S)
For dense, rectangular doors and panels. Uses a conveyor-fed L-sealer and shrink tunnel. Machine dimensions (representative; confirm with supplier): L 5000 × W 1200 × H 1700 mm. Voltage: 380 V / 50 Hz, 3-phase. Cycle time: ≤15 seconds per unit under 2000 mm length.
Best for: high volumes, standard door sizes, stable film supply.
Trade-off: higher initial capital; moderate film cost per unit.
Solution 2 – Horizontal stretch wrapping (4-sides; optional full 6-sides)
For doors with protruding handles or decorative edges that cannot tolerate shrink heat. Wraps bubble film onto the surface first, then applies stretch film via an orbital arm (a rotating ring that moves film around the product). Throughput: 20–30 seconds per door for 4-sides, 40–50 seconds for full 6-sides.
Best for: fragile or heat-sensitive surfaces, mixed-size runs.
Trade-off: slower than shrink, but film usage can be precisely controlled.
Solution 3 – Vertical stretch wrapping
For tall, narrow panels (e.g., cabinet doors >2000 mm height) where horizontal space is limited. The door stands vertically on a turntable; a rotating arm wraps pre-stretched film (film stretched before application to reduce material use). Machine footprint: ≈9 m². Cycle time: 20–25 seconds per unit.
Best for: long, thin panels, low spaces, or when the client already uses vertical conveyors.
Trade-off: less stable for very wide panels; film must be pre-stretched.
All three solutions are controlled by a PLC (programmable logic controller—an industrial computer that automates machine sequences) and can store recipes for different door dimensions. The client tested sample doors on all three machines before final selection. Note: Cycle times and throughput depend on door size, film type, and operator skill; the figures above are under controlled test conditions.
🛡️ Implementation
After a two-week trial and cost analysis, the client chose the shrink packer Model S for their main line and installed the horizontal stretch wrapper on a secondary line for premium doors with glass inserts. Implementation took four days: days 1–2 mechanical installation, day 3 electrical and PLC programming, day 4 commissioning and operator training. The supplier provided on-site training for two shifts. The shrink tunnel required a dedicated electrical line with ≥20 kVA capacity and compressed air supply at 6 bar.
Operators needed less than two hours to become proficient because the machine automatically adjusts conveyor speed and sealing bar temperature based on door thickness. For the stretch wrapper line, the crew learned to store five-recipe presets for common door sizes.
⚙️ Results Data
After 90 days of production (based on client’s internal tracking; results may not be independently verified), the Model S line achieved an average throughput of 85 doors per hour—more than double the manual rate—with film consumption reduced by 22% due to mechanically consistent tension. Transit damage dropped from 15% to 2.1% (only three damaged shipments in the period, traced to improper stacking rather than wrapping). The secondary line (horizontal stretch wrapper) ran at 48 doors per hour for glass-insert doors, still 20% faster than manual, though material waste was slightly higher due to bubble film.
| Quantified results at month 3 (client internal reports): | Metric | Before | After | Change |
|---|---|---|---|---|
| Throughput per line | 40/hr | 85/hr | +112% | |
| Film consumption per door | 1.0 kg avg | 0.78 kg avg | –22% | |
| Damage rate (transit) | 15% | 2.1% | –86% | |
| Labor per line | 6 operators | 1 operator | –83% | |
| Overtime cost (peak month) | $3,200 | $400 | –87% |
All figures are based on the client’s internal reporting; verify with your own controller. Machine dimensions and cycle times are representative; confirm with supplier.
🛠️ ROI Analysis
According to the client’s estimates, the total machine and installation cost for the main line was approximately $38,000 (FOB). Direct labor savings of $24,000 per year (reducing five workers from each line), film savings of $6,500 annually, and a dramatic drop in damage claims (previously $12,000/year) yield a combined first-year benefit of $42,500. This gives a payback period of approximately 11 months. Even after accounting for maintenance (~$1,500/year) and electricity (~$1,200/year), net ROI after two years exceeds 200%.
ROI assumptions: labor reduction assumes no reallocation of removed workers; film price remains stable. The payback calculation depends on a stable door volume of at least 1,200 units/day. For lower volumes, payback extends significantly:
| Daily volume | Payback period (estimated) |
|---|---|
| 1,200 units | ~11 months |
| 800 units | ~16 months |
| 400 units | ~24 months or more |
At volumes below 600 units/day, a semi-automatic machine may be more economic. The client’s most important intangible benefit was consistent package quality—every door leaves the line with the same film tension, seam position, and moisture barrier, eliminating customer complaints within the first quarter.
🏗️ Purchase-Decision Checklist
Use this table to compare solutions for your own door or panel line.
| Factor | Shrink (Model S) | Horizontal stretch (4-/6-sides) | Vertical stretch |
|---|---|---|---|
| Best for | Standard doors, high volume | Fragile / irregular surfaces | Tall thin panels |
| Throughput (units/hr) | 70–100 | 20–50 | 20–40 |
| Film waste control | Good (pre-cut) | Very good (tension control) | Moderate |
| Heat exposure | Yes (shrink tunnel) | None | None |
| Footprint (incl. conveyor) | ≈18 m² | ≈25 m² | ≈9 m² |
| Installed cost (typical, based on supplier quotes) | $35k–$45k | $25k–$35k | $20k–$30k |
| Payback (estimated at ~1,200 units/day) | 10–14 months | 12–18 months | 14–20 months |
🛡️ Compliance Note: This equipment is designed to meet ISO and ASTM requirements. Verify with the manufacturer.
📈 FAQ
Which machine should I choose if my door sizes change daily?
The horizontal stretch wrapper is best for daily size changes because its orbital arm adapts to length/width without mechanical adjustment. The shrink packer also handles mixed sizes but requires recipe storage—fine if your range is within 1800–2500 mm length. Cycle times will vary; test with your actual door mix.
Can I wrap doors with glass inserts using a shrink machine?
Not recommended. Shrink heat (typically 160–200°C) can stress or crack glass. Use the stretch wrapper with bubble film for glass-panel doors.
What is the typical delivery lead time for these machines?
Based on supplier quotes, standard models like the shrink packer Model S ship in 30–45 days (FOB). Custom sizes add 2–3 weeks. Always confirm lead time with the supplier.
Does the machine require special operator skills?
No. PLC-based machines with touchscreen presets require minimal training—any packer can be proficient within one shift. Most troubleshooting is guided by on-screen alerts. A PLC (programmable logic controller) is an industrial computer that automates machine sequences.
What maintenance is needed?
Weekly: clean film rollers, check seal bar tension (shrink packer), lubricate conveyor chain. Monthly: inspect heat-sealing knife, verify temperature sensors, update PLC backups. Annual: replace seal bar cover, service gearbox.
Disclaimer: All monetary figures are based on client estimates or supplier quotes unless otherwise noted. Machine dimensions, cycle times, and throughput depend on specific door sizes, film type, and operator skill; confirm with supplier. The 90-day results are from the client’s internal tracking and may not be independently verified.
