| 1 | Production Capacity | Match the machine's output with the required daily volume, cup size, wall thickness, and forming cycle. | Typical screening range: approximately 30–120 cups per minute for small to medium thermoformed cups. Actual output depends on cavities, material, cup dimensions, and cycle time. | Is the quoted output based on finished, inspected cups or only theoretical cycles? What output is achievable with our exact cup design? | Critical |
| 2 | Automation Level | Check whether sheet feeding, heating, forming, trimming, stacking, counting, and scrap collection are manual, semi-automatic, or automatic. | Recommended for continuous production: automatic in-line forming, trimming, stacking, and counting. Automatic functions can reduce handling labor and variation between batches. | Which operations still require an operator? Can the machine stop automatically when material, air pressure, or stack capacity is abnormal? | High |
| 3 | Cycle Speed and Stability | Evaluate cycle time, repeatability, acceleration, and performance during long production runs rather than only the maximum speed. | Useful benchmark: compare rated cycles per minute with tested sustained output over at least 2–4 hours. A stable machine should maintain consistent forming and stacking without frequent stops. | Can you provide a continuous-run test using the intended resin, sheet thickness, mold, and cup geometry? | Critical |
| 4 | Energy Consumption | Review heater zones, servo drives, cooling systems, compressed-air demand, and the difference between installed power and actual operating consumption. | Planning range: many thermoforming lines operate around 0.20–0.60 kWh per kilogram of processed plastic, but the result varies significantly with heater efficiency, material, thickness, and utilization. | What is the measured kWh per kilogram or per 1,000 cups under our production conditions? Is the figure measured at full load or during idle operation? | High |
| 5 | Material Compatibility | Confirm suitability for the planned resin and sheet structure, including PP, PET, PS, PLA, recycled content, and multilayer sheets where applicable. | Check operating limits: material thickness, sheet width, forming temperature, heating profile, and maximum recycled-content percentage supported by the process. | Which materials have been successfully tested? Are separate heating recipes or molds required for different materials? | Critical |
| 6 | Changeover Flexibility | Assess mold replacement, recipe storage, trim-tool adjustment, stacking changes, and cleaning requirements when switching cup sizes. | Good target: repeatable recipe-based setup with clearly documented changeover steps. Changeover time should be measured using the actual molds and tools, not an empty-machine demonstration. | How long does a normal cup-size change take? Which components must be replaced, and can one operator complete the procedure safely? | High |
| 7 | Product Quality Control | Inspect wall-thickness distribution, rim integrity, dimensions, transparency or appearance, trimming accuracy, and stack consistency. | Suggested controls: temperature monitoring by zone, pressure and vacuum alarms, automatic fault detection, sample inspection, and documented dimensional tolerances for the finished cup. | Which quality parameters are monitored automatically? Can the system identify incomplete forming, web breaks, temperature deviations, or mis-stacked cups? | Critical |
| 8 | Maintenance Accessibility | Review access to heaters, filters, pneumatic parts, lubrication points, sensors, mold components, and electrical cabinets. | Practical target: routine inspection points should be accessible without removing major guards. Preventive maintenance intervals should be clearly listed by operating hours or production cycles. | Which parts require daily, weekly, monthly, and annual service? Are maintenance procedures and exploded spare-part drawings included? | High |
| 9 | Utilities and Factory Requirements | Verify electrical load, compressed-air quality and pressure, cooling-water requirements, ventilation, floor space, and material-handling access. | Common utility checks: compressed air is often required at approximately 6–8 bar, while exact flow, voltage, cooling capacity, and installed power depend on the machine configuration. | What are the actual air-flow, cooling-water, electrical, ventilation, and foundation requirements? Are utility consumption figures measured or estimated? | Critical |
| 10 | Safety, Service, and Total Cost | Consider guarding, emergency stops, interlocks, training, remote support, spare-parts availability, warranty, and lifetime operating cost. | Minimum review: documented risk controls, accessible emergency stops, guarded moving parts, operator training, preventive-maintenance plans, and a spare-parts list covering at least the first operating year. | What is included in installation and training? What is the response process for breakdowns, and which wear parts should be kept in stock? | Critical |