| 1 | Automatic Roll-Fed Thermoforming Line | Plastic sheet is unwound, heated, formed with a mold, trimmed, and stacked automatically. | PP PET PE | Approximately 20,000–90,000 lids per hour, depending on mold cavities and cycle time. | Flat drink lids, dome lids, dessert lids, snap-on lids, and high-volume food-service lids. | Sheet thickness commonly 0.25–0.80 mm; heating temperature must be matched to the polymer; forming pressure is commonly supplied by compressed air and/or vacuum. | High automation, consistent trimming, fast mold changes on suitable designs, and efficient multi-cavity production. | Requires stable sheet quality, adequate compressed air, reliable scrap handling, and sufficient floor space. |
| 2 | Inline Extrusion Thermoforming Machine | Pellets are melted and extruded into sheet, which is formed and trimmed in the same production line. | PP PET | Approximately 15,000–70,000 lids per hour. | Large-volume beverage lids, yogurt lids, snack-cup lids, and thin-wall disposable lids. | Extrusion temperature profile, melt filtration, sheet thickness control, mold cooling, and forming cycle must be synchronized. | Eliminates separately purchased sheet, reduces sheet-handling steps, and allows direct control of sheet thickness. | Higher initial investment and more complex process control than a standalone sheet-fed line. |
| 3 | Injection Molding Machine with Multi-Cavity Lid Mold | Molten polymer is injected into a cooled mold and ejected as finished lids. | PP PE | Approximately 10,000–100,000 lids per hour, depending on cavity count and cycle time. | Rigid snap-on lids, drinking lids, resealable lids, threaded lids, and lids requiring accurate sealing features. | Clamping force, injection pressure, melt temperature, mold cooling, gate design, and cycle time are critical. | Excellent dimensional accuracy, repeatable sealing features, and strong control of ribs, plugs, and hinge details. | Tooling is more expensive and cycle energy can be higher; part design must support efficient ejection. |
| 4 | High-Speed Thin-Wall Injection Molding Cell | High-speed injection unit produces thin lids using a precision multi-cavity mold, often with robotic take-out. | PP | Approximately 30,000–180,000 lids per hour for high-cavity configurations. | Lightweight takeaway lids, coffee lids, cold-drink lids, and thin-wall food-container lids. | Fast injection speed, high mold rigidity, short cooling time, balanced cavity filling, and precise hot-runner control. | Very high productivity and low part weight when the mold and process are correctly optimized. | Demands high-quality tooling, stable resin drying and feeding, precise temperature control, and skilled maintenance. |
| 5 | Pressure Thermoforming Machine | Heated sheet is formed over or into the mold with vacuum plus positive air pressure. | PP PET | Approximately 12,000–60,000 lids per hour. | Detailed dome lids, anti-spill lids, clear lids, portion-cup lids, and products with defined surface textures. | Forming pressure may reach several bar above atmospheric pressure; accurate heating and plug-assist control improve wall distribution. | Produces more detailed shapes and better material distribution than basic vacuum forming. | Compressed-air consumption is higher, and mold sealing and pressure stability directly affect product quality. |
| 6 | Vacuum Thermoforming Machine | Heated plastic sheet is drawn against a mold by vacuum and then trimmed. | PP PET | Approximately 8,000–45,000 lids per hour. | Simple flat lids, shallow dome lids, disposable food lids, and economical packaging covers. | Vacuum level, sheet temperature, mold venting, heating-zone balance, and trimming accuracy are essential. | Simple operating principle, relatively moderate investment, and suitability for many low-to-medium complexity lid designs. | Deep or highly detailed lids may show uneven wall thickness unless plug assist or pressure forming is added. |
| 7 | Continuous Sheet Extrusion and Slitting Line | Pellets are melted and extruded into a continuous sheet or roll stock for later thermoforming. | PP PET PE | Approximately 150–600 kg per hour of sheet output, depending on extruder size and material. | Pre-production of roll stock for flat lids, dome lids, and custom thermoformed packaging. | Extruder diameter, screw design, melt temperature, die gap, chill-roll temperature, and thickness tolerance determine sheet quality. | Flexible sheet supply, centralized material control, and the option to serve multiple forming machines. | It does not produce finished lids by itself; downstream forming, trimming, and scrap recycling are required. |
| 8 | Compression Molding Machine for Thin-Wall Lids | Measured polymer charges are compressed between heated or temperature-controlled mold surfaces. | PP PE | Approximately 20,000–120,000 lids per hour for high-cavity systems. | Lightweight beverage lids, thin-wall closures, and lids requiring consistent flatness and sealing geometry. | Charge weight, compression force, mold temperature, cooling time, and mold balancing affect dimensional stability. | Can provide short cycles, low part weight, and good control of lid thickness in suitable designs. | Less suitable for every lid geometry; accurate material dosing and specialized tooling are important. |
| 9 | Cut-and-Stack Thermoforming System | Formed sheet is cut directly around each lid, followed by automatic counting and stacking. | PP PET | Approximately 10,000–55,000 lids per hour. | Stackable flat lids, shallow dome lids, lids with uniform outer profiles, and high-volume disposable packaging. | Cutting die clearance, sheet temperature, stacking speed, edge quality, and nesting design are key parameters. | Integrated cutting and stacking reduce manual handling and improve packaging-line compatibility. | Cutting dies require periodic sharpening; complex undercuts and irregular shapes may need a different trimming method. |
| 10 | Prototype and Small-Batch Thermoforming Machine | Pre-cut sheets are heated and formed using interchangeable molds, with manual or semi-automatic trimming. | PP PET PE | Approximately 500–8,000 lids per hour, depending on operator workflow and mold layout. | Sampling, market testing, custom lids, short production runs, and tooling validation. | Manual loading, heating-zone control, vacuum level, mold temperature, and trimming method determine output and repeatability. | Lower investment, flexible mold changes, and practical for product development or regional production. | Labor cost per lid is higher, and dimensional consistency may be lower than with fully automatic systems. |