Ooitech Solar Panel Laminator — Complete Product Catalogue

1. Product Overview & Application

The solar panel laminator is the most critical process equipment in the photovoltaic module production line. It bonds multiple layers of materials — EVA encapsulant, tempered glass, backsheet, and solar cells — together through a controlled combination of heat and vacuum inside a sealed lamination chamber.

Ooitech offers a complete range of laminators from compact semi-automatic bench-top models to large-scale fully-automatic double-layer, triple-chamber production lines. All models are compatible with:

• Mono-crystalline silicon solar modules

• Poly-crystalline silicon solar modules

• Double-glass solar modules (bifacial)

• TOPCon, HJT and other advanced cell technologies

2. Model Naming Convention

3. Technical Specification Comparison Table — All Models

4. Individual Model Specifications

5. Common System Descriptions

The following descriptions apply to all full-automatic oil-heating models (OTCY-2446, 2658, 2666, 2787D, 2787DD, BT2787). Semi-automatic electric models share the same control and safety logic but have simplified mechanical structure.

5.1 Feeding System

• The feeding stage uses an anti-deviation conveyor belt to perfectly transition modules to the main laminating unit.

• Controlled by frequency conversion system + photoelectric positioning system + encoder fool-proofing system. Transmission speed is continuously adjustable from 4 to 14 m/min.

• Three operating modes available: Auto feeding, Manual feeding, and Emergency management (via transmission inching button).

• Photoelectric sensor at the end of the conveyor belt provides module protection and positioning. If positioning deviation is detected, modules cannot enter the lamination section (alarm triggered).

• Double-layer (BT2787, 2787DD) models use stacked belt loading platforms — each layer has its own independent loading unit.

5.2 Laminating / Curing Section

• Chamber structure: Each lamination chamber consists of an upper chamber (upper box) and a lower heating plate, separated by a silica gel plate with a sealable bead/pressing frame, forming two independent sub-chambers (upper and lower).

• Heating plate: Made of 60 mm thick Q235 steel plate. Surface is finished by fine grinding; surface irregularity ≤200 µm/m². Double-inlet and double-outlet pipeline design for heat-conducting oil.

• Heating rate: Not less than 1.5°C/min.

• Temperature deviation: ≤±2°C (standard); ≤±1.5°C (premium models).

• Temperature measurement: ≥5 points per heating plate, displayed in real-time on touch screen.

• Each sub-chamber can be independently vacuumed and inflated. The vacuum value is set and controlled — supports segmented / staged lamination profiles. A SMC pressure sensor monitors real-time pressure; a Pa-class vacuum gauge is installed in the lower chamber.

• Laminating section vacuum pump: 2X-70 rotary vane + ZJP600 Roots pump set. Pumping rate ≥630 m³/h (OTCY-2787D/DD) or ≥600 m³/h (2658/2666). Time to 100 Pa:<90 seconds.

• Curing section vacuum pump: 2X-70 rotary vane pump. Pumping rate ≥70 L/s. Time to 100 Pa:<90 seconds.

• Cover lifting: Working opening height 100–120 mm; ultimate opening height (maintenance) ≥250 mm.

• Positioning accuracy: Gear motor + frequency control + encoder system. Repeat positioning accuracy within ±10 mm.

• Upper and lower conveyor belts of the main laminating unit are equipped with roller brush cleaners to remove EVA/film residue from the high-temperature cloth.

• The heating plate is equipped with a special blowing device (on 2658/2666 models) to prevent the high-temperature cloth from sticking to the plate surface.

5.3 Unloading / Discharge Section

• Discharge conveyed by stainless steel rollers driven by frequency conversion system, speed adjustable to match feed and host machine speed.

• Optional: buffer-type stainless steel roller unloading.

• Photoelectric sensors at front and rear ends monitor discharge in real-time to prevent modules from falling.

• The discharge section includes a fan cooling function — fans activate automatically when modules are discharged to accelerate cooling.

• Double-layer models (BT2787, 2787DD) use stacked multi-roller conveyors with integrated air coolers for accelerated module cooling.

5.4 Transmission System

• Main machine transmission: Gear motor + frequency control speed + encoder control, driving high-temperature cloth via chain. Repeat positioning accuracy: ±10 mm.

• Feeding and discharging stages: Gear motor + frequency control speed to match main engine speed.

• High-temperature cloth is arranged in a large-cycle circular motion — multiple cloths connected in series, continuously circulating without disconnection during the entire transmission process. The connection/join points of upper and lower cloths do NOT contact the module surface.

• Synchronous gear design ensures upper and lower high-temperature cloth systems always move in synchrony.

• Chain tensioning design + anti-jumping gear device reduces chain looseness from wear, ensuring smooth, continuous transmission without chain breakage or jumping.

5.5 Lifting System

• Both laminating and curing stages use pneumatic lifting, controlled by three-position five-way solenoid valves.

• Key pneumatic components (cylinders, lifting solenoid valves, pneumatic solenoid valves) use Japanese SMC (or equivalent reputable) brand components.

• Each cylinder's inlet and outlet are equipped with exhaust throttle valves to adjust lifting speed, ensuring stable and synchronous cylinder movement.

• Independent air control safety system: A dedicated air safety circuit — separate from the main hoisting mechanism — provides a holding signal for each cylinder. This prevents the upper chamber from falling due to power outages, pipe bursts, or other abnormal causes.

• Double-layer 2787DD model: Uses 8-column pneumatic lifting arrangement per chamber for stability on the large-format platform.

5.6 Heating System (Oil Heating Models)

• The heating plate is heated by heat-conducting oil circulating through a perforated/drilled plate. Double-inlet and double-outlet pipeline design for uniform temperature distribution.

• Heating rate: ≥1.5°C/min.

• Temperature deviation: ≤±2°C (standard); ≤±1.5°C (BT2787, 2658 single-chamber).

• Multi-point temperature control with PID self-tuning technology (standard temperature module). Achieves excellent temperature uniformity.

• Heating station from qualified manufacturers: provides real-time monitoring of temperature and pressure, with automatic alarm and shutdown on over-temperature or over-pressure conditions.

• BT2787 uses SD320 thermal oil with four sets of 72 kW heating stations.

• Oil tank over-temperature alarm: engine stops and alarms if oil temperature exceeds 180°C.

• Operating procedure: Allow oil pump to run in normal circulation for at least 3 minutes before turning on heating. When shutting down: stop heating first, then turn off the oil pump. Do NOT turn off the hot oil pump when temperature is above 100°C.

5.7 Vacuum System

• Lamination chamber vacuum controlled by a high-vacuum butterfly valve (Roots pump set).

• Under working temperature conditions, the ultimate vacuum of the lamination chamber can reach below 40 Pa. In automatic operation mode, lamination chamber vacuum ≤100 Pa.

• Each chamber is equipped with a Japanese SMC zero differential pressure pneumatic membrane two-way solenoid valve (VXZ260KG) for vacuum chamber inflation. Inflation rate freely adjustable from 0–50 L/s (or 0–70 L/s on OTCY-2787D).

• Each chamber has an SMC pressure sensor for real-time chamber pressure monitoring. Touch screen displays live pressure. Lower chamber additionally equipped with a Pa-class vacuum gauge.

• The entire vacuum/pneumatic system is equipped with a manual backup operating system for manual inflation and venting during unexpected power failure, minimizing losses from fault conditions.

5.8 Control System

• Whole equipment controlled by PLC (Siemens) + Touch Screen (Kunlun Tongtai).

• Multi-recipe storage: Various process recipes (formulas) can be saved and recalled at any time, accommodating different manufacturers and material batches.

• Data persistence: Process parameters and setting data are automatically memorized and stored on every power cycle — no loss of settings.

• Lamination count statistics: Records production count per shift for scheduling, maintenance planning, and consumable replacement tracking.

• MES integration: Optional production process management system (MES) available upon user request.

• Three production modes selectable by operator: Manual, Semi-automatic, and Automatic. If an abnormality occurs during automatic operation, the machine can switch to manual mode to reduce losses.

• Three-stage lamination supported; vacuum and pressure values are independently set and controlled for each stage.

• High-end brand electrical components: superior performance, reliable quality, low replacement rate.

• Equipment cabling, piping, and installation accessories comply with national standards and relevant regulations.

• BT2787 features independent double touch screens (one per layer) for simultaneous independent control of each production layer.

6. Safety Control

6.1 Alarm & Protection Functions (Oil Heating Models)

6.2 Alarm & Protection Functions (Electric Heating / Semi-Auto Models)

6.3 Anti-Drop Safety (All Models)

• Dual safety measures: pilot-operated air control valve + mechanical lock. The upper cover will not fall when the equipment is suddenly powered off or the pipeline is faulty, preventing lamination failure and personnel injury.

• An independent air control safety system prevents the upper chamber from falling due to power failures or burst pipes.

6.4 Other Safety Features

• Safety warning signs on all relevant parts.

• Three-color lights and alarm system for real-time equipment operation status monitoring.

• Process password protection: Modification of process parameters requires authorized password entry.

• Vacuum indicator: In case of sudden power failure, lamination status can be assessed and appropriate action taken.

• Insulation measures: All pipelines and heating parts are thermally insulated to reduce energy consumption and temperature loss.

• Emergency stop button: Powers off the whole machine when pressed. Reset by rotating in the arrow direction on the button.

• Vacuum pipe between vacuum pump and laminator should not exceed 12 meters to maintain vacuum performance.

• Before opening the cover, confirm that the lower chamber has been inflated to atmosphere. Opening the cover under negative pressure is strictly prohibited.

7. Key Components & Brands

8. Factory / Installation Requirements (General)

9. Warranty & After-Sales Service

• Warranty Period: One year after successful installation, or 16 months from bill of lading date — whichever is earlier.

• Warranty Coverage: During the warranty period, the seller provides timely maintenance services and necessary spare parts free of charge (excluding consumables). Courier costs for spare parts are the buyer's responsibility.

• On-site Support: If buyer's engineers cannot resolve an issue during the warranty period, the seller will dispatch engineers to the buyer's plant. Round-trip airfare, local transport, accommodation, and meals in the buyer's city are at the buyer's expense.

• Warranty Exclusions: Damage or malfunctions arising from misuse, abuse, self-demolition or modification by any party other than the seller's authorized technicians, or use inconsistent with the operation manual.

• Post-Warranty Support: The seller continues to provide free online service and technical guidance indefinitely after the warranty period. Spare parts are supplied to the buyer at favorable prices. On-site engineer visits after warranty: buyer covers airfare, visa, accommodation, travel expenses, and labor costs per the seller's standards.

• Consumables: Provided upon payment at all times (not covered under warranty).

• Operator Training: After installation and commissioning, machines must be operated only by trained personnel.

10. Operating & Safety Notes (User Manual Extract)

Extracted from the Ooitech Laminator Operating Instruction manual (Model A2236 and applicable to all full-auto models).

10.1 Symbol Guide

10.2 Key Operating Precautions

1. Do not use this product in corrosive gas, moisture, flammable, or explosive environments.

2. Ensure the machine is properly grounded before operation.

3. Do not open the terminal protective cover when the device is powered or running.

4. Do not touch the circuit board with bare hands — risk of electric shock and ESD damage.

5. Operators must wear insulated gloves when manually placing or removing laminated modules.

6. Maintenance personnel must power off the machine before maintenance. Verify no danger exists before wiring, checking, or moving the machine.

7. When starting or closing the machine, keep hands away from the main unit. In emergency, press the emergency stop button immediately.

8. During belt/chain transmission movement, non-operators must leave the area. Operators must not place hands or body parts near or into the conveyor belt.

9. When machine is in working condition, all non-operators must stand at least 1 meter from the machine.

10. Visitors and non-professionals are not allowed to operate this machine.

11. The vacuum pipe between vacuum pump and laminator must not exceed 12 meters — longer distances degrade vacuum performance.

12. When shutting down the vacuum pump, first inflate both chambers to atmospheric pressure. The cover must NEVER be opened while the lower chamber is under negative pressure.

13. Allow the oil pump to run in normal circulation for at least 3 minutes before turning on heating. When shutting down: stop heating first, then turn off the oil pump. Never turn off the hot oil pump when temperature is above 100°C.

14. When the machine is not actively working, open the cover to allow heat dissipation after stopping heating.

15. Turn off the main power supply after laminator operation is complete, to avoid interference with associated equipment.

16. Do not slide or place sharp objects (e.g. blades) on the conveyor belt surface — this will shorten belt service life.

17. The automatic laminator has high precision electrical components. Do not arbitrarily reposition or redirect any electrical component — this may cause malfunction.

18. Do not place any foreign objects on the heating platform surface — the cover exerts significant pressure during operation.

19. Before opening the cover, always verify the lower chamber has been inflated to atmosphere.

20. The emergency stop button powers off the entire machine. Reset by rotating the button in the direction indicated by the arrow after troubleshooting.

10.3 Model Code Interpretation (from User Manual)