Sandwich Panel Line

Sinowa is a sandwich panel line supplier from china, customized high-quality & high efficiency sandwich panel line at low price, the adoption of system integration technology and bus control technology accomplishes the full automatization of integrated and coordinated control of the sandwich panel line with accessible remote interactive communication. Ranking the first-class level in the world, it is currently the sandwich panel line in the market taking a comprehensive lead in high performance.

The high-tech sandwich panel line can meet a variety of production needs of customers, the whole sandwich panel line design concept of modularization enables all our components to be integrated and combined at will. Our high efficiency sandwich panel line can easily automate the production of roof sandwich panel, wall sandwich panel, cold storage sandwich panel and other products by different combination and configuration selection and siple switching. The inner core layer can be polyrethane or rock wool, glass wool, an so on.

The high precision sandwich panel line has high adaptability, which may produce various sandwich panel of the PU, PIR and rock wool systems. We may design various products according to the customer’s requirements, including various configurations, so as to meet their demands with flexible price system. Highly integrated and linked control system centralizes all control points at the main central center, achieving parameter linkage, fault self-diagnosis controlled by the whole line and shipping distance control. High-level automatic control system also saves the manpower and reduces the manpower loss for customers.

The precision servo hoisting mechanism employed by the main engine without hydraulic system makes the board thickness control flexible and the customer may conveniently change or adjust the board thickness. There will be not such troubles as hydraulic system adjustment, leakage, maintenance, etc.

High-level energy saving and protection design makes the whole sandwich panel line possible to produce around the clock throughout the year and the customer will save huge budget. In addition, the isolated heat preservation room is constructed for warming the environment. The energy saving and protection design of our manufacturing line may guarantee that the customer’s production line may be freely heated and produce in the main time to save more costs for customers.

The high-power low-consumption design quickens the reaction of the cheap sandwich panel line while energy consumption is kept low. With the brand-new, fully sealed inner insulation design, the energy consumption is controlled at the minimum level to achieve the design objective of less than an hour for the insulation system to be activated from the room temperature above 5℃ to the production process temperature. The energy consumption is only 40% that of those similar products.

A sandwich panel line is a fully integrated, continuous manufacturing system designed for the mass production of composite sandwich panels, which are widely applied in modern construction, industrial enclosure, cold storage facilities and portable building structures. This automated production system integrates multiple interconnected functional modules to complete the whole panel manufacturing process from raw material pretreatment to finished product stacking, realizing seamless and efficient one-stop production. Different from discrete manual or semi-automatic processing equipment, the modern sandwich panel line adopts synchronous operation logic for all functional units, effectively eliminating production discontinuity and quality instability caused by segmented processing. It can adapt to diverse core materials and surface layer specifications, delivering composite panels with stable structural integrity, excellent thermal insulation performance and uniform surface flatness. As the core equipment for standardized composite panel production, it optimizes production workflows, reduces unnecessary material waste and manual intervention, and meets the large-scale and high-quality production demands of the modern building materials industry.

The operational foundation of a sandwich panel line lies in its scientific modular layout and systematic material flow design, which arranges all production procedures in a linear and continuous sequence to ensure unobstructed raw material transmission and processing. The entire production system consists of multiple core functional units that cooperate synchronously, including raw material unwinding and pretreatment, surface material forming, core material conveying and processing, adhesive coating, composite lamination, constant-temperature curing, fixed-length cutting, surface finishing and automatic stacking. Each functional module is equipped with independent sensing and driving components, and all units are coordinated through a unified control logic to maintain consistent operating speed and processing accuracy throughout the production process. This integrated structural design avoids redundant material handling and repeated positioning operations that are common in traditional separate production equipment. By following the one-way material flow principle, the line minimizes material displacement errors and production delays, laying a stable foundation for continuous and uninterrupted batch production. Every module is precisely calibrated to match the production rhythm of adjacent units, ensuring that each processing link can fully exert its functional advantages without mutual interference.

Raw material pretreatment and feeding serve as the initial and fundamental link of the entire sandwich panel production process, directly determining the flatness and uniformity of subsequent composite processing. The surface layer raw materials, usually coiled sheet materials, are processed by a professional unwinding system with high-precision tension control devices. This system can stably unfold coiled materials at a constant speed, effectively avoiding material wrinkling, stretching or deviation caused by uneven tension during unwinding. Meanwhile, the built-in correction mechanism automatically adjusts the material transmission track to ensure the surface materials are fed in a straight and neat state. For core materials, the supporting feeding unit realizes quantitative and uniform conveying of different types of core substrates, ensuring consistent core material thickness and density in each section of the panel. In addition, the pretreatment module includes simple surface cleaning and trimming procedures to remove surface impurities and irregular edges of raw materials. Standardized pretreatment and feeding operations eliminate the quality differences caused by uneven raw material status, providing qualified basic materials for subsequent bonding and composite molding processes.

Surface material roll forming is a key processing step that shapes the outer structure of sandwich panels, endowing the flat sheet materials with standardized structural profiles and edge specifications. After completing pretreatment and feeding, the flat surface sheets enter the roll forming unit, which is composed of multiple groups of precision arranged roller sets. These roller sets conduct gradual and orderly cold pressing and bending on the sheet materials through staged extrusion, avoiding structural damage or stress concentration caused by one-time forced forming. The gradual forming mode ensures that the metal or composite surface materials maintain uniform internal stress and smooth surface texture after molding. The roll forming system can adapt to different panel profile requirements by adjusting roller spacing and pressing parameters, realizing flexible production of various edge structures and surface shapes. During the forming process, real-time monitoring components track the dimensional accuracy of the formed materials, automatically fine-tuning the roller working status to ensure consistent forming effects for each batch of materials. Stable and precise roll forming quality ensures the overall structural regularity and assembly adaptability of finished sandwich panels.

Adhesive coating and core material laying are critical links that determine the bonding strength and overall structural stability of sandwich panels. After surface material forming is completed, the inner sides of upper and lower surface layers will pass through an automatic glue coating system, which adopts quantitative and uniform glue discharging technology to form a complete and consistent adhesive layer on the material surface. Different from traditional manual or semi-automatic glue application methods that suffer from uneven glue thickness and missing coating, the automated system optimizes internal glue flow channels to prevent glue precipitation, accumulation and uneven distribution. The precisely controlled glue application amount and coating range ensure that the adhesive can fully cover the bonding area without excess glue overflow. Meanwhile, the core material conveying unit synchronously feeds the processed core materials into the middle of the upper and lower surface layers, realizing accurate alignment and docking between core materials and surface layers. The coordinated operation of glue coating and core laying processes ensures a tight fit between the three layers of materials, effectively avoiding hollowing, delamination and other quality defects in finished panels.

Continuous composite lamination is the core molding procedure of the sandwich panel line, which integrates surface layers and core materials into an integral semi-finished panel structure. This process is mainly completed by a high-precision double-belt laminator, the core functional component of the entire production line. The upper and lower symmetric conveyor belts of the laminator can provide stable and uniform pressing force, effectively balancing the expansion force generated by core material processing and adhesive reaction. This constant pressure control mode ensures that the overall thickness of the panel remains consistent, and the surface flatness meets production requirements during the composite molding process. The double-belt structure can also maintain stable transmission speed, ensuring that the composite materials move forward synchronously without relative displacement. In the lamination stage, the system fine-tunes pressing pressure and running speed according to different core material characteristics and panel thickness specifications. The continuous composite molding mode realizes integrated forming of multi-layer materials, greatly improving the structural integrity of the panel and enhancing the overall bonding firmness compared with intermittent composite processing methods.

Constant-temperature curing and shaping processes are essential for stabilizing the structural performance of newly composited sandwich panels. After completing lamination and preliminary molding, the semi-finished panels enter the independent constant-temperature curing unit, which is equipped with a circulating hot air heating system to form a uniform and stable temperature environment inside the curing chamber. The balanced temperature distribution promotes full reaction and rapid curing of the adhesive, enabling the surface layers and core materials to form a firm and permanent bonding structure. The system can adjust the curing temperature and holding time according to different adhesive types and core material properties, avoiding insufficient curing that leads to weak bonding or excessive high-temperature treatment that damages the core material performance. During the curing process, the panels are kept in a flat and fixed transmission state to prevent deformation and warping caused by uneven stress. The scientific curing treatment completely stabilizes the internal structure of the panel, locks in the thermal insulation and structural performance of the product, and lays the foundation for subsequent finishing and cutting processing.

Precision fixed-length cutting and edge trimming processes realize the dimensional standardization and appearance optimization of finished sandwich panels. After curing and shaping, the continuous long-strip panel materials are transmitted to the cutting unit, which adopts high-precision cross-cutting equipment to complete fixed-length cutting according to preset production parameters. The automatic positioning and cutting system can accurately control the panel length dimension, ensuring consistent specifications of each finished panel. The cutting tool adopts high-hardness and wear-resistant materials, which can complete smooth cutting without burrs, cracks or edge deformation on the panel section. Meanwhile, the edge trimming device performs fine trimming on the four edges of the cut panels to remove tiny residual materials and irregular edges generated during production and cutting. This refined processing not only improves the appearance flatness and neatness of the panels but also ensures the dimensional accuracy of on-site assembly. The automated cutting and trimming process replaces manual measurement and cutting, completely eliminating dimensional errors caused by human operation and improving the consistency of finished product specifications.

Surface finishing and quality inspection links further optimize the product quality and appearance performance of sandwich panels. After cutting and trimming, the panels enter the surface finishing unit to complete subsequent fine processing procedures such as surface cleaning and defect checking. The professional cleaning device removes residual dust, glue stains and tiny impurities on the panel surface, restoring the smooth and clean surface texture of the product. At the same time, the online monitoring system conducts real-time detection of panel surface flatness, bonding integrity and dimensional accuracy. The system can automatically identify subtle quality defects such as local delamination, surface scratches and uneven thickness that are difficult to detect manually. For unqualified products, the system will mark and screen them in time to prevent defective products from entering the finished product link. The integrated finishing and inspection mechanism realizes full-process quality control, effectively ensuring that all off-line finished panels have qualified appearance and stable structural performance, and greatly reducing the rate of defective products in batch production.

Cooling conveying and automatic stacking are the final key links of the sandwich panel production process, realizing orderly collection and standardized storage of finished products. After quality inspection, the qualified panels are transmitted to the cooling conveyor unit for natural and balanced cooling treatment. The slow and uniform cooling mode avoids local temperature difference caused by rapid cooling, effectively preventing panel deformation, warping and internal stress rebound. After cooling and shaping, the panels are automatically transported to the stacking station, where the intelligent stacking equipment neatly stacks the panels on pallets according to fixed specifications. The stacking system can adjust the stacking height and arrangement mode according to product types and storage requirements, ensuring stable and orderly stacking without extrusion damage to the panels. The fully automated cooling and stacking process completely avoids manual handling damage and irregular stacking problems, improves the neatness of finished product storage, and facilitates subsequent packaging, transportation and warehouse management work.

Intelligent control and system linkage technology support the efficient and stable long-term operation of the entire sandwich panel line. The whole production line adopts a centralized decentralized control system, which can uniformly manage and adjust the operating parameters of all functional modules. Operators can view the real-time operating status, production progress and equipment parameter data of the entire line through the visual operation interface. The system supports real-time monitoring and automatic adjustment of key parameters such as feeding speed, pressing pressure, curing temperature and cutting size, realizing intelligent precise control of the production process. When abnormal parameters or equipment failures occur in a single module, the linkage control system will automatically issue early warnings and make synchronous adjustments or emergency stops to avoid chain production failures. The intelligent linkage design not only ensures the synchronous and coordinated operation of each production link but also simplifies daily equipment operation and management, reduces the difficulty of manual operation, and improves the overall production stability and intelligent level of the equipment.

Daily maintenance and performance optimization management are crucial to extending the service life and maintaining stable production efficiency of the sandwich panel line. As a highly integrated automated production equipment, the line requires standardized regular maintenance for each functional module to eliminate potential equipment faults in advance. Daily maintenance work includes cleaning transmission components, checking the operating status of roller sets and cutting tools, detecting the sensitivity of sensing elements, and lubricating transmission parts. Regular professional maintenance involves calibrating equipment operating parameters, testing the stability of the control system, and replacing worn vulnerable parts in a timely manner. Scientific maintenance can effectively avoid equipment aging, parameter deviation and functional failure caused by long-term continuous operation, ensuring that the equipment always maintains high-precision processing performance. In addition, according to production demand changes and raw material updates, targeted parameter optimization and module debugging can be carried out to improve the adaptability and production efficiency of the line, realizing long-term stable and high-quality operation of the production system.

« Sandwich Panel Line » Update Date: 2026/8/28

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