Used Sandwich Panel Line For Sale

PU SANDWICH PANEL CONTINUOUS PRODUCTION LINE

Technical Specifications and Performance Parameters

1. General Introduction

The continuous production line for polyurethane (PU) foam insulation panels is designed for the production of modern building materials offering high thermal insulation, sound insulation, fire resistance, water resistance, lightweight construction, and environmentally friendly properties.

The line can produce various polyurethane fire-resistant insulation panels using different facing materials such as pre-painted steel sheet, aluminum foil, kraft paper, non-woven fabric, and galvanized steel sheet.

The panel width and core thickness can also be adjusted according to the customer’s requirements. The line is particularly suitable for the production of steel-faced sandwich panels and insulation panels used in metal structures.

The production process consists of continuously injecting polyurethane foam between the facing materials and passing the material through a double-belt system during the foam reaction/polymerization process to form a composite panel.

The materials move forward at a constant speed through pre-formed guides. Once the panel is fully formed, it is automatically cut into the required lengths. This allows continuous production without stopping the production line.

 

2. Main Equipment of the Production Line

The PU composite insulation panel production line basically consists of the following equipment:

• Uncoiling System
• Forming Machine System
• Preheating Device
• Polyurethane Foaming System
• Double-Belt Heating System
• Cutting System
• Cooling System
• Wrapping System
• Lifting & Handling System
• Automatic Stacking System

 

3. Sandwich Panel Cooling System

The panels coming out of the continuous press system have a high temperature due to the chemical reaction occurring in the polyurethane or rock wool core.

The cooling system is designed to cool the panels slowly and in a controlled manner.

A Caterpillar / Rotary Cooling System is used to lift and rotate the panels in a controlled manner.

Purpose:

• Gradually reduce the panel temperature
• Prevent deformation of the metal surfaces
• Prevent shrinkage of the foam
• Maintain panel surface quality

The cooling process generally takes approximately 20–45 minutes.

 

4. Sandwich Panel Packaging System

The packaging system is used to protect the panels against moisture, scratches, dust, and external factors that may occur during transportation.

Protective Film Application

Protective film is applied to the metal surfaces of the panels.

Stacking

The automatic system places the panels on top of each other to form a package.

Stretch Wrapping

The completed panel package is completely wrapped with stretch film to protect it against dust, moisture, and external factors.

Protective Barriers

Cardboard or foam protectors are placed at the corners to prevent the binding straps from damaging the panel edges.

 

5. Lifting & Handling System

Due to the length and weight of sandwich panels, special lifting and handling equipment is used.

Vacuum Lifters

Vacuum lifting systems grip the panel surface and allow the panels to be lifted without causing scratches or dents.

Spreader Beams

Horizontal lifting beams used together with cranes distribute the load evenly along the panel during lifting.

 

6. Automation and Control System

The entire production line operates with a high level of automation and integrated control technology.

The following technologies are used:

• CNC Servo Control
• Vector Frequency Drive (VFD)
• PLC Control System
• Hydraulic Control
• Centralized Control and Distribution System
• Automatic Length Measurement and Cutting System

Each unit can be controlled independently, while the complete system can also operate together through the centralized control system.

Production Speed

Production speed:

5–9 meters/minute

The speed can be adjusted according to the panel type and production requirements.

Annual Production Capacity

Approximately:

800,000 m²/year

This capacity is approximately calculated based on 250 m²/day, 10 months of operation per year, and three-shift operation.

HMI Control System

The line is equipped with a computer-controlled HMI system with a touchscreen interface.

The operator can enter the required operating parameters for each production section into the system and perform automatic production.

Once the raw materials and production preparations are completed, panel production and cutting operations are carried out automatically.

 

7. Uncoiling System

Function

The uncoiling machine is used to feed and unwind steel coils into the production line.

The system is equipped with a hydraulic cantilever-type coil expansion mechanism.

The coil is transported to the uncoiler unit using a lifting trolley. The lifting mechanism performs coil loading and unloading.

A hydraulic cylinder centers the coil. The coil is expanded and secured through an inclined-surface movement mechanism.

Different support accessories can be used to accommodate different coil inner diameters.

The line includes 2 uncoiler units, one for the upper sheet and one for the lower sheet.

Uncoiler Technical Specifications

• Maximum load capacity: 10 tons
• Uncoiling speed: 0–30 m/min
• Steel coil inner diameter: 508 / 610 mm
• Maximum material loading width: 1250 mm
• Centering adjustment range: 250 mm

 

8. Lifting Trolley

• Maximum load capacity: 10 tons
• Travel speed: 6 m/min
• Maximum lifting stroke: 500 mm
• Maximum horizontal travel stroke: 3000 mm

Hydraulic and Pneumatic System

• Maximum hydraulic pressure: 16 MPa
• Hydraulic station motor: 3 kW
• Air supply pressure: 0.7 MPa

 

9. Auxiliary Equipment

A conveyor table is installed between the forming machine and the uncoiling machine to transport and align the sheet material.

The sheet pressing mechanism is raised and lowered by a cylinder, while the material is transported by a drive motor.

 

10. Forming Machine

The guide system at the inlet section of the forming machine aligns the steel sheet with the center reference of the production line.

The forming rollers produce cold-storage panels, wall panels, and other types of sandwich panel profiles.

The formed sheet is then fed through an intermediate conveyor table to the preheating furnace and the main production line.

Main Components

The forming system consists of:

• Upper forming machine
• Lower forming machine
• Upper pressing machine
• Upper and lower intermediate conveyor tables
• Preheating furnace connection system
• Platform and safety equipment

 

11. Raw Material and Sheet Specifications

Inner Pre-Painted Steel Sheet

• Thickness: 0.3–0.8 mm
• The sheet surface must be flat and free from bulging, deformation, and lateral curvature.

Outer Pre-Painted Steel Sheet

• Thickness: 0.3–0.8 mm
• The sheet surface must be flat and free from deformation and lateral curvature.

Wall Panel Outer Sheet

• Thickness: 0.3–0.8 mm

Corrugated Panel Outer Sheet

• Thickness: 0.4–0.8 mm

Steel Sheet Yield Strength

• Yield Strength: 235 MPa
• Maximum: approximately 300 MPa

Stainless Steel Sheet for Cold Storage Panels

• Thickness: 0.4–0.6 mm
• The sheet surface must be flat and free from deformation.

 

12. Panel Forming Widths

Hidden-Fix Wall Panel

• 600–1080 mm

The actual width may vary depending on the panel profile and required raw sheet width.

Cold Storage Panel

• 600–1220 mm

The actual width may vary depending on the panel type and required raw sheet width.

 

13. Forming Machine Motor Power

Upper Forming Machine

• 7.5 kW

Lower Forming Machine

• 7.5 kW + 7.5 kW

Panel Output Speed

• 2–10 m/min

The forming rollers can be designed for square-wave profiles, small corrugations, and different panel profiles.

Auxiliary Equipment

The total length of the intermediate conveyor table between the forming machine and the preheating furnace is approximately:

17 + 30 meters

The pressing platform for the upper forming machine is equipped with safety railings, stairs, and a heavy-duty steel sheet platform.

 

14. Two-Component Foaming Machine System

Two-Component Polyurethane Foaming Machine

Product Advantages

The system is based on advanced Italian technology and incorporates advanced technology used in the production of high-pressure foaming machines.

The system can be widely used in the following industries:

• Refrigerators
• Freezers
• Cold storage panels
• Sandwich panels
• Continuous insulation panels
• Refrigerated truck bodies
• Security doors
• Water tanks
• Wood-effect furniture
• Electric water heaters
• Insulation products

Spare Parts Support

The manufacturer provides reliable technical support and timely supply of required spare parts.

 

15. Two-Component Raw Material Technical Specifications

Polyol (POL)

Viscosity:

200–3000 mPa·s / 20°C

ISO – Isocyanate

Viscosity:

300–3000 mPa·s / 20°C

Injection Pressure

8–16 MPa

Injection Flow Rate

60–600 g/s

Mixing Ratio

1:1

Adjustable mixing ratio:

1:3 – 3:1

Injection Time

0.5–99.99 seconds

Accuracy:

0.01 seconds

Injection Repeatability Error

≤ ±2%

Material Temperature

25 ±3°C

Mixing Head

FPL-1014

Raw Material Tank Capacity

300 liters

Hydraulic System

• Flow rate: 10–16 L/min
• System pressure: 20 MPa

Pneumatic Operating Pressure

0.6–0.8 MPa

Compressed Air Requirement

Dry and oil-free air

• Pressure: 0.45 MPa
• Flow rate: 400 L/min

 

16. Temperature Control System

The system is equipped with heating pipes and a temperature control mechanism.

Hydraulic Oil Temperature

Below 50°C

The oil is cooled through the return circulation system.

Metering Pump Motor

5.5 kW × 2

Machine Footprint

Approximately:

3 × 2 meters

Total Power

Approximately:

22 kW

Total Machine Weight

Approximately:

2 tons

Electrical Supply

380 V / 50 Hz

If a dedicated generator is used, voltage stabilization is required.

 

17. Main Brands and Control Systems

The system uses high-quality components from international and local brands to ensure stable operation.

Injection System

Cannon – Italy

Mixing/injection head manufactured using Cannon technology.

Estimated service life:

More than 500,000 cycles

Electrical Control System

Siemens PLC

A programmable Siemens control unit and Siemens touchscreen system are used.

Software

The original Italian control software from Cannon is used.

 

18. Double Conveyor Belt System

Main Function

The upper and lower belts balance the expansion pressure generated during the polyurethane foam reaction and determine the final thickness of the panel.

The side belts resist the horizontal expansion forces and maintain a constant panel width.

This allows the panel width, thickness, and surface flatness to be controlled with high precision.

Structural Features

The conveyor chains are approximately:

200 mm wide

They are manufactured from specially machined and heat-treated components to ensure surface flatness and prevent deformation or scratches during operation.

The belt height and thickness can be adjusted.

Adjustments are performed through electronically controlled lifting mechanisms.

 

19. Double-Belt Technical Parameters

• Effective double-belt length: 24 meters
• Lower belt working height: 1200 mm
• Effective upper and lower belt width: 1200 mm
• Operating speed: 4–16 m/min
• Gap between belts: 10–370 mm
• Flatness deviation of a single chain plate: ≤ ±0.06 mm

Main Motor

11 kW × 2

One motor for each belt.

Side Belt Length

20 meters

 

20. Band Saw Automatic Tracking Cutting System

Function

The system accurately measures the panel length using an encoder and performs automatic cutting synchronized with the moving panel without stopping the production line.

A suction and dust collection system is provided to collect dust generated during cutting.

Cutting System Technical Specifications

• Main motor: 5.5 kW
• Servo motors: 3 kW servo motors for longitudinal and transverse movement

Guide System

HIWIN – Taiwan

Linear guides with enclosed protection against dust are used.

Cutting Accuracy

• ±1 mm for lengths up to 6 meters
• ±2 mm for lengths from 6 to 12 meters

Cutting Height

15–240 mm

Maximum Cutting Width

13,000 mm

Band Saw Rotation

180° ±0.5°

Equipped with a high-precision return mechanism.

 

21. Cooling Conveyor System

Function

The system receives the cut panels and transports them in a controlled manner for natural cooling.

Special openings allow the panels to come into full contact with air, enabling natural cooling.

This system minimizes the risk of thermal deformation and shrinkage.

Technical Note

Transporting corrugated panels during the cooling process is not recommended. Especially during winter, it is recommended to transfer the panels directly to the stacking platform.

Cooling Conveyor Technical Specifications

• Conveyor length: 13,000 mm
• Conveyor width: 15,000 mm
• Maximum panel capacity: approximately 40 panels
• Conveyor speed: 60 m/min

The speed can be adjusted using a VFD variable-frequency drive system.

• Maximum permitted panel thickness: 200 mm

 

22. Vacuum Suction Stacking System

Function

This system is equipped with a gantry crane system and vacuum suction pads for automatically separating and neatly stacking the cut panels.

The system also includes a 180° hydraulic turning mechanism for individually rotating corrugated panels.

The panels are aligned with high precision and stacked into an orderly package.

Safety System

The machine is equipped with self-locking vacuum generators to prevent the panels from falling in the event of sudden interruption of electrical or air supply.

The vacuum pads maintain sufficient vacuum force for a certain period in the event of power or air failure, preventing the panels from falling.

 

23. Stacking Technical Specifications

• Maximum panel length: 16 meters
• Maximum panel width: 1200 mm
• Maximum stacking height: 1200 mm
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