Introduction
Sandwich panels are widely used in industrial buildings, cold storage facilities, and fire-rated construction projects.
In real manufacturing environments, however, panel quality is not only determined by raw materials, but also by process stability, equipment coordination, and operator experience.
A modern sandwich panel production line integrates multiple systems into one continuous workflow, allowing manufacturers to achieve stable output, consistent panel dimensions, and reliable bonding performance for PU, PIR, and EPS panels.
1. Complete Production Process
A sandwich panel production line operates as a continuous system rather than isolated machines. Each step directly affects the next stage.
Coil Handling System
Steel coils are loaded and fed automatically into the line.
In long-term production, coil alignment and tension stability play a critical role in panel surface quality. Even minor deviations may cause edge misalignment during roll forming.
For this reason, modern lines use hydraulic uncoilers and precise guiding systems to ensure smooth and uninterrupted feeding.
Roll Forming System
The roll forming system shapes the upper and lower steel sheets to the required profile.
Unlike simple forming equipment, sandwich panel roll forming must maintain:
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Consistent sheet flatness
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Accurate profile matching between top and bottom sheets
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Stable operation during continuous production
In practical operation, improper roll adjustment is one of the most common causes of panel waviness, especially during high-speed runs.
Foaming / Core Processing System
The foaming or core processing system is the heart of the production line.
For PU and PIR panels, foam injection must be synchronized precisely with belt speed, temperature, and pressure.
In actual projects, temperature fluctuation inside the double belt conveyor is a major factor affecting foam density consistency and bonding strength.
For EPS or alternative core materials, feeding stability and thickness control are equally important to avoid internal gaps or uneven insulation performance.
Cutting & Stacking System
Panels are cut to length using a flying saw or cross-cutting machine without stopping the line.
Accurate cutting depends not only on servo control, but also on:
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Stable panel speed
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Consistent curing condition before cutting
After cutting, automated stacking systems reduce manual handling and minimize surface damage, especially for long or thick panels.
Cooling System (Optional but Recommended)
In many real installations, cooling is underestimated.
Panels that are stacked before sufficient cooling may experience:
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Internal stress
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Slight deformation during storage
An integrated cooling system helps stabilize panel shape and improves overall product consistency, particularly for thicker PU or PIR panels.
2. Key Equipment Systems Overview
A complete sandwich panel production line typically includes:
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Coil handling and feeding system
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Roll forming system
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Foaming or core processing system
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Double belt conveyor
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Cutting, stacking, and packaging systems
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Electrical control and monitoring system
Rather than focusing on individual machines, successful projects prioritize system coordination and long-term operational stability.
3. Turnkey Solutions in Real Projects
Turnkey solutions go beyond equipment supply.
In practical projects, turnkey service usually includes:
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Factory layout planning based on available space
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Capacity design considering local labor and energy costs
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On-site installation, commissioning, and trial production
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Operator training during actual production runs
For first-time investors, turnkey support significantly reduces project risks and shortens the time from installation to stable production.
4. Applications of Sandwich Panels
Panels produced by modern sandwich panel production lines are commonly used in:
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Industrial plants and warehouses
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Cold storage and refrigerated buildings
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Fire-rated walls and roof systems
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Clean rooms and modular buildings
By adjusting panel thickness, core material, and surface profile, one production line can serve multiple application markets.
5. Frequently Asked Questions (FAQ)
What types of sandwich panels can be produced?
PU, PIR, EPS panels, and customized panel structures depending on line configuration.
How many operators are required?
In practice, operator numbers depend on automation level and shift arrangement. Some factories start with more staff during commissioning and reduce personnel once production stabilizes.
What production capacity can be achieved?
Production capacity typically ranges from 1.5–3.5 million m² per year, depending on line speed, panel thickness, and working hours.
Is on-site installation support provided?
Yes. On-site supervision, commissioning, and operator training are usually included in turnkey projects.
How is product quality controlled?
Quality control focuses on foam density, bonding strength, panel thickness, and visual inspection throughout the production process.
6. Why Choose Guangxing Machinery
Guangxing Machinery focuses on providing stable, practical, and customizable sandwich panel production solutions.
With experience in international projects, our production lines are designed not only for output capacity, but also for long-term reliability and ease of operation.
Contact us to discuss how a sandwich panel production line can be configured to match your specific production goals.