Key Equipment in Sandwich Panel Production Line
Uncoiler System
The uncoiler system is designed to hold and feed steel coils into the production line with precision and efficiency. It features hydraulic expansion arms that center the coil automatically, supporting both 508mm and 610mm inner diameters through interchangeable arc plates.
Key Features
- Hydraulic Cantilever Expansion:Quick and stable coil loading with automatic centering.
- Coil Adaptability:Easily handles different coil sizes (ID 508mm/610mm) via hydraulic expansion blocks.
- Support Arm & V-Clamp System:Prevents main shaft deformation, especially for heavy coils (up to 5 tons), while enabling fast coil changes within 45 seconds.
- Motorized Uncoiling Drive:Bidirectional control via motor and reducer, synchronized with the main line using ultrasonic sensors.
- Hydraulic Center Adjustment:±75mm center positioning with visible scale markers ensures precise alignment.
- Pressing Unit: Inclined top pressing unit (30–40°) prevents interference with the frame during coil feed-in
Up Panel Lifting Device
This device facilitates the vertical feeding of upper steel sheets into the roll forming machine from ground level. It ensures smooth material transfer and maintains continuous panel alignment.
Technical Highlights:
- Gantry-Type Welded Frame:Durable structure for stable lifting.
- Lifting Power:5kW motor for vertical motion.
- Feeding Power:75kW motor for horizontal feed.
- PU-Coated Rollers:Chain-driven rollers protect surface finish and offer steady grip.
- Integrated Cylinder Control:Two SC63×25 pneumatic cylinders coordinate the feed and lift actions.
Filming Device
The filming unit ensures clean and wrinkle-free lamination of protective film onto steel panels. It uses an air-expanding roller to mount the film coil and a series of drive and press rollers to maintain stable film contact.
Key Features
- Roller System:∮75mm air-expanding roller with 100kg load capacity.
- Precise Alignment:Lateral film alignment mechanism prevents air bubbles and misalignment.
- Rotating Shaft Design:Simplifies film coil replacement and handling.
- Brake-Equipped Uncoiling:Ensures consistent tension during film application.
- High-Speed Poll Knife:75kW motor, operating at 50 m/min for cutting film ends.
- Driving Roller:5kW motor driving the main lamination process at 18 m/min.
Cutting, Side Slitting & Rewinding Unit
This multifunctional section enables precise panel cutoff, side trimming, and rewinding of edge waste. It supports multiple product types and coil widths with easy adjustability.
Main Components:
- Transverse Pre-Cutter:Cuts off panels after each production batch, minimizing material waste.
- Side Slitting Machine:Allows for variable-width product customization.
- Blade Specs:High-hardness Gr12MoV blades (HRC60–62°) with a cutting range of 0.3–0.8mm thickness.
- Slitting Width Range:5mm to 150mm, suitable for narrow and wide panel trims.
- Guide Rails:High-precision linear guides ensure stability and smooth movement (2 for cutter, 4 for slitter).
- Motor Power:4kW for stable operation of slitting mechanisms.
Heating System Of Sandwich Panel
Steel Plate Preheating Furnace
The preheating furnace ensures uniform heating of steel plates before foam injection, improving the adhesion and cell structure of PUR/PIR foam.
System Overview:
- Modular Design:Includes the furnace body, heating elements, air ducts, insulation, and control systems.
- Precision Temperature Control:Adjustable heating levels optimized for foam reactivity and bonding.
- Energy Efficiency:Insulated design reduces heat loss and operational costs.
Double-Belt Temperature Control System
This system maintains consistent pressure and temperature during the foaming and curing process, forming the core structure of the sandwich panel.
Highlights:
- Belt-Type Continuous Compression:Ensures even foam expansion and uniform thickness.
- Temperature Zones:Multiple heating zones can be independently controlled to optimize curing conditions for PUR/PIR.
- Advanced Control Panel:Monitors belt speed, pressure, and temperature with real-time feedback and adjustments.
- Stable Panel Output:Guarantees flatness, thermal performance, and surface quality of finished panels.
Application of Sandwich Panel Production Line
The sandwich panel production line is a fully automated solution designed for the continuous manufacturing of high-performance insulated panels. It is primarily used for producing PUR (Polyurethane) and PIR (Polyisocyanurate) sandwich panels, as well as specialized cold storage panels with superior thermal insulation properties.
This production line integrates raw material feeding, continuous foaming, panel shaping, cutting, and stacking into a seamless workflow. By utilizing PUR/PIR foaming technology, the panels exhibit excellent thermal resistance, fire retardancy, and dimensional stability, making them ideal for use in cold storage facilities, refrigerated warehouses, food processing plants, and industrial cleanrooms.
FAQs of Sandwich Panel Production Line
What types of cores can be used in sandwich panels?
PU, PIR, Phenolic, EPS, and Mineral Wool are common options. PU and PIR offer the best insulation; Mineral Wool offers better fire resistance.
What is the typical thickness range of the panels?
Panels can range from 30mm to 200mm thick, depending on the application.
What surface materials are used?
Pre-painted galvanized steel (PPGI), stainless steel, and aluminum sheets are most commonly used..
What’s the production speed of a continuous line?
Standard production speed is 4–8 meters per minute, depending on the panel type and line configuration.
Can the line be customized for different panel widths and profiles?
Yes, roll-forming machines can be designed for adjustable panel widths and interchangeable profile rollers.
What’s the difference between continuous and discontinuous lines?
Continuous lines are suitable for mass production and offer higher speed and efficiency. Discontinuous (batch) lines are more flexible for smaller runs or specialized panels.
How are the panels cut to length?
A flying saw or circular cutter, synchronized with line speed, ensures clean, accurate cutting.