PU Sandwich Panel Line

Sinowa is a high-end & high precision pu sandwich panel line manufacturer from china, customize pu sandwich panel line according to customer needs, reasonable price and high-quality service. We will continue to create more and better pu sandwich panel line according to your requirements and assist you in the road to success!

Sinowa dedicated to the research and development of high-end and high-efficiency Sandwich Panel Production Line, Sinowa is comprehensively taking the leading position in terms of efficiency, automation control level, HMI, environment protection and energy consumption, with subversive designs made in some critical technological fields to procure exceptional cost performance and customer-friendly experience for the entire production line. The adoption of system integration technology and bus control technology accomplishes the full automatization of integrated and coordinated control of the entire production line with accessible remote interactive communication. Ranking the first-class level in the world, it is currently the PU Sandwich Panel Machine in the market taking a comprehensive lead in high performance.

Sinowa is a well-known manufacturer and technical service provider of high-end PU Sandwich Panel Machines and various high-performance Cold Roll Forming Machine in China. Our main products include polyurethane double-sided color steel Sandwich Panel Production Line, polyurethane and phenolic soft facing insulation panel production line and high-efficiency roll forming lines.

Sinowa is committed to the development and manufacturing of high-end and high-efficiency Sandwich Panel Lines. Our production lines are leading the way in efficiency, automatic control, human-computer interaction, environmental protection and energy consumption. Using system integration and bus control technology, it realizes the automatic integrated linkage control of the entire production line, and can achieve remote interactive communication, which has the world-class level and a comprehensive leading high-performance production line in the market.

For more than ten years, we have never deliver two same lines to our client, there are all the crystallization of continuous improvement, we have been trying to surpass ourselves, create better products to serve our customers, and also accumulate our brand value, become a unique Chinese enterprise, we are no longer synonymous with low price and mediocre quality.

Since 2014, we have established our Cold Forming Machine design and manufacturing department, started our R&D and production of high-end cold forming equipment. Base on our innovative and high-end and efficient product concepts,In just a few years, we have created our own impressive achievements in this field. Whether ordinary construction products of Roll Forming Machine, or precision steel pipe equipment, elevator profile equipment, automotive profile equipment, precision door and window profile equipment, we are the leader of Chinese equipment with high efficiency, high quality and beautiful appearance design.

For more than ten years, relying on our innovative manufacturing concept and excellence in quality, reliable and trustworthy service to customers, we cooperate with customers all over the world, exported products to Canada, South Korea, Israel, Australia, the Middle East and other more than 20 countries and regions. contributed to building energy conservation and low-carbon production and have won widespread praise.

Sinowa has invested outstanding efforts in both the Continuous Insulated PU Sandwich Panel Production Line and the Roll Forming Line, This is why our products are more efficiency, quality, automatic control technology, environmental protection, energy consumption indicators and the appearance and safety protection are comprehensively leading, Some subversive design changes in many major technical points,these major innovations make our products excellent in price/performance and user experience.

We always position our PU Sandwich Panel Line in a very high standard, strictly optimize every design for more progress. Our continuous innovation, continuous improvement of the technical design principles make us improved product updates and always pay attention to high efficiency, energy saving and stability, reduce customer worries, become their reliable business partners.

Sinowa Engineering Technology Research Center has always focused on technology research and development. we achieved a large number of scientific research results and unique patented process technology in related product research and development t every year, we continuously improve our products to have high precision and high stability in practical applications, and provide high quality for customers all over the world. Excellent technical personnel, continuous R&D investment and the technical concept of "continuous innovation and continuous improvement" are the strong guarantee for Sinowa to stand out from competitors.

Our focus is not on cost, we always pay attention to the quality of the product and how to do it better!

Production process control is a core part of implementing product planning and implementing quality control, which we establish A full range of production management processes and product logistics systems. We firmly believe that production without control and rules will only produce garbage products, so we pay more attention to first-class production control training while establishing a first-class production workshop, strictly follow the 5S management concept, establish systems and standards, ensure that our Sandwich Panel Machines are qualified throughout the process, achieve the technical goals of the company's products to achieve our brand value.

Sinowa has a very comprehensive quality control system, has a group of professional quality control personnel, familiar with almost all testing methods and standards in the field of machining, established a complete mechanical and chemical laboratory with which can fully control all quality links and ensure that all data are accurate, timely optional and available.

Relying on our good Sandwich Panel Machine quality and trustworthy service, our products are exported to more than a dozen countries in the world, and the service field continues to expand, winning more and more praise. Every customer will be our best friend!

A PU sandwich panel line is a specialized and integrated manufacturing system designed to produce high-quality polyurethane (PU) sandwich panels in a continuous, efficient, and automated manner. These production lines combine multiple technological processes, from raw material preparation to finished product handling, to form composite panels consisting of a PU foam core bonded between two outer facing materials. The seamless coordination of each component within the line ensures consistent product quality, stable production efficiency, and adaptability to various application requirements. Unlike traditional discrete manufacturing methods, the PU sandwich panel line realizes the integration of mechanics, chemistry, electrical control, and temperature control technologies, making it an indispensable core equipment in the modern building materials and industrial insulation fields. The structure of a PU sandwich panel line is carefully designed to meet the technical requirements of each production link, with each component playing a unique and critical role in ensuring the smooth operation of the entire production process.

The basic structure of a PU sandwich panel line mainly includes unwinding equipment, roll forming system, PU foaming system, laminating device, cooling conveyor unit, cutting equipment, and automatic stacking and packaging system, as well as an intelligent control system that coordinates the operation of all components. The unwinding equipment is the starting point of the production line, responsible for stably feeding the coiled facing materials into the subsequent processes. It usually adopts a mandrel-type hydraulic automatic operation mode, which can accurately control the tension of the coil to prevent deviation or wrinkles during the unwinding process, ensuring the flatness of the facing materials. Some advanced unwinding systems are equipped with a 2+2 coil changing unit, which allows for non-stop coil replacement, effectively improving the continuous production capacity of the line and avoiding production interruptions caused by coil replacement. The facing materials used in the production line are mostly metal coils, such as galvanized steel, galvalume steel, or aluminum sheets, which have excellent durability, corrosion resistance, and structural strength, and can be flexibly replaced according to different product requirements.

The roll forming system is connected to the unwinding equipment and is responsible for shaping the flat facing materials into the required profiles. This system is composed of a series of tandem rolling stands, and the facing materials are gradually pressed and bent into designed shapes under the guidance of rollers and gears. The roll forming system adopts a cassette-type and rail-wheel design, which allows for quick replacement of rolling molds, enabling the production line to produce facing profiles of different styles and specifications, such as corrugated, ribbed, or flat surfaces, to meet the needs of different application scenarios. The precision of the roll forming system directly affects the appearance quality and structural stability of the final PU sandwich panels, so the rollers are processed with high precision to ensure the consistency of the profile shape and size.

The PU foaming system is the core component of the entire production line, as it determines the performance of the PU foam core, which is the key to the thermal insulation, sound insulation, and structural strength of the sandwich panels. This system mainly consists of raw material storage tanks, metering pumps, mixing heads, and a mobile pouring device. The raw materials required for PU foaming, including polyol, isocyanate, foaming agents, catalysts, and other additives, are stored in separate tanks to avoid chemical reactions before use. The metering pumps are used to accurately control the proportion of each component, as the ratio of raw materials directly affects the density, foaming effect, and final performance of the foam core. The metering system has high precision to ensure that the proportion error is within a small range, thus guaranteeing the consistency of the foam core quality. The raw materials are fully mixed in the mixing head to initiate the chemical reaction, and then evenly poured onto the bottom facing material through the mobile pouring device. The mobile pouring device can adjust its distance and height according to the width of the panel, ensuring that the foaming raw materials are evenly distributed without local density unevenness.

The laminating device is responsible for bonding the upper facing material, bottom facing material, and the foaming PU core into an integrated sandwich panel. It usually adopts a double-track conveyor structure, which can apply uniform pressure and temperature to the three-layer structure. After the bottom facing material is coated with PU foaming raw materials, the upper facing material, which has been shaped by the roll forming system, is accurately fed onto the foaming raw materials, and then the three-layer structure enters the double-track conveyor together. The double-track conveyor is equipped with a heating and heat preservation unit, which can maintain a stable temperature environment (usually around 60℃) suitable for PU foaming and curing. During the conveying process, the PU raw materials undergo a full foaming reaction and firmly bond with the upper and lower facing materials, forming a complete sandwich panel blank. The pressure applied by the double-track conveyor ensures that the bonding between the foam core and the facing materials is tight, avoiding gaps that may affect the performance of the panels. The length of the double-track conveyor is usually designed according to the foaming and curing time of the PU raw materials, ensuring that the foam core is fully cured before entering the next process.

The cooling conveyor unit is connected to the laminating device and is used to cool and shape the cured sandwich panel blanks. After being processed by the double-track conveyor, the sandwich panels have a certain temperature, and direct cutting or stacking may cause deformation. The cooling conveyor unit usually adopts natural cooling or forced air cooling methods, and the panels are slowly conveyed on the conveyor belt to gradually reduce the temperature, ensuring the structural stability of the panels and preventing deformation. The cooling time is determined according to the thickness of the panels and the performance of the PU foam core, and the speed of the cooling conveyor can be adjusted in conjunction with the production speed of the entire line to ensure the cooling effect.

The cutting equipment is responsible for cutting the continuous sandwich panel blanks into fixed-length finished products according to customer requirements. It is usually composed of a positioning device, a clamping mechanism, and a cutting blade. The positioning device can accurately capture the length signal of the panels, and the clamping mechanism clamps the panels tightly during the cutting process to prevent displacement, ensuring the accuracy of the cutting length. The cutting blade is made of high-hardness materials, which can realize smooth and flat cutting without burrs or damage to the panel surface. Some advanced cutting equipment is equipped with a numerical control system, which can automatically adjust the cutting length according to the set parameters, improving the cutting precision and efficiency. After cutting, the clamping mechanism is automatically lifted, and the cutting device resets to wait for the next cutting operation.

The automatic stacking and packaging system is the end link of the production line, responsible for stacking the cut finished panels in an orderly manner and packaging them to prevent damage during storage and transportation. The stacking system adopts a mechanical arm or a lifting platform to automatically stack the panels according to the set height and quantity, which not only improves the stacking efficiency but also ensures the neatness of the stack. The packaging system usually uses plastic film or packaging paper to wrap the stacked panels, which can prevent moisture, dust, and scratches, protecting the appearance and performance of the panels. Some production lines can also integrate additional functions such as punching, embossing, or inkjet printing into the packaging system according to customer needs, further enriching the product functions.

The intelligent control system is the "brain" of the PU sandwich panel line, responsible for coordinating and controlling the operation of all components of the production line. This system is composed of a programmable controller (PLC), a touch screen, and various detection sensors, which can realize the precise input and real-time adjustment of production parameters. Operators can set parameters such as production speed, panel thickness, cutting length, and foaming temperature through the touch screen, and the system will automatically synchronize the operation status of each unit to ensure the smooth connection of the entire production process. The detection sensors are installed at each key link of the production line to monitor parameters such as the tension of the facing materials, the temperature of the foaming system, the thickness of the panels, and the cutting length in real time. If an abnormal situation is detected, the system will issue an alarm in time and even stop the operation of the relevant equipment to avoid product defects or equipment failures. The intelligent control system not only reduces the labor intensity of operators but also effectively reduces human operation errors, improving the stability of product quality and the safety of production operations.

The performance of a PU sandwich panel line is reflected in multiple aspects, including production efficiency, product quality stability, operational flexibility, energy conservation and environmental protection, and reliability. Production efficiency is an important indicator to measure the performance of the production line, which is usually expressed by the production speed and annual output. The production speed of a common PU sandwich panel line can be adjusted between 3 and 12 meters per minute, and the annual output can reach millions of square meters, which is much higher than that of traditional manual or semi-automatic production methods. The high production efficiency of the line is mainly due to its continuous and automated operation mode, which avoids the time waste caused by manual operation and process interruption. In addition, the non-stop coil changing function of the unwinding system and the quick mold changing function of the roll forming system further improve the production efficiency, enabling the production line to adapt to large-scale and continuous production needs.

Product quality stability is another core performance of the PU sandwich panel line. The entire production process of the line is controlled by the intelligent control system, and each key parameter is accurately monitored and adjusted, ensuring that the performance and size of each batch of products are consistent. The precision of the unwinding equipment and roll forming system ensures the flatness and size accuracy of the facing materials; the high-precision metering and mixing system ensures the uniformity of the PU foam core density and the firmness of the bonding with the facing materials; the stable temperature control of the laminating device ensures the full curing of the foam core; and the precise cutting equipment ensures the accuracy of the product length. These factors together ensure that the produced PU sandwich panels have stable performance, uniform specifications, and excellent appearance quality, avoiding the quality fluctuations caused by manual operation.

Operational flexibility is also an important performance feature of the PU sandwich panel line. The production line adopts a modular design, and each component can be flexibly combined and adjusted according to different production requirements. For example, by replacing the rolling molds of the roll forming system, the production line can produce facing profiles of different shapes and sizes; by adjusting the proportion of raw materials in the foaming system and the temperature of the laminating device, the performance of the PU foam core can be changed to produce sandwich panels with different thermal insulation, sound insulation, and fire resistance performance; by adjusting the parameters of the cutting equipment, the production line can produce finished products of different lengths to meet the personalized needs of customers. In addition, the production line can also adapt to different types of facing materials and foaming core materials, such as replacing metal facing materials with non-metal facing materials, or replacing PU foam with PIR foam, rock wool, or glass wool, further expanding the product range of the production line.

Energy conservation and environmental protection are important performance indicators of modern manufacturing equipment, and the PU sandwich panel line also has excellent performance in this regard. The intelligent control system of the production line can optimize the operation parameters of each component, reducing energy consumption. For example, the heating system of the laminating device adopts a circulating heating design, which improves the utilization rate of heat energy and reduces energy waste; the metering system accurately controls the amount of raw materials, avoiding raw material waste caused by inaccurate proportioning. In addition, the production line can use environmentally friendly foaming agents and raw materials, such as pentane-based foaming agents, which do not contain harmful substances and have no pollution to the environment. At the same time, the production line can be equipped with a waste recycling system to collect and reuse the waste generated during the production process, such as leftover materials of facing materials and waste PU foam, reducing environmental pollution and improving the utilization rate of resources.

Reliability is the guarantee for the long-term stable operation of the PU sandwich panel line. The components of the production line are made of high-quality materials and processed with high precision, which have good wear resistance, corrosion resistance, and fatigue resistance. The key components, such as metering pumps, mixing heads, and cutting blades, are designed with a high safety factor and undergo strict quality inspection before leaving the factory to ensure their service life. The intelligent control system has a fault self-diagnosis function, which can quickly locate the fault point when an abnormal situation occurs, facilitating maintenance personnel to carry out maintenance work in a timely manner, reducing the downtime of the production line. In addition, the production line is equipped with multiple safety protection devices, such as emergency stop buttons, safety doors, and tension protection devices, which can effectively protect the safety of operators and equipment, further improving the reliability of the production line.

PU sandwich panel lines can be divided into different types according to various classification standards, and the classification is mainly based on production mode, product specification, and foaming technology. According to the production mode, PU sandwich panel lines can be divided into continuous production lines and intermittent production lines. Continuous production lines are the most common type in the market, which can realize uninterrupted production from unwinding, roll forming, foaming, laminating, cooling, cutting to stacking and packaging. This type of production line has high production efficiency, stable product quality, and is suitable for large-scale mass production. It is widely used in large-scale building materials factories and industrial production bases. Intermittent production lines, on the other hand, complete each production link in batches, and the production process is discontinuous. This type of production line has a simple structure, low investment cost, and is suitable for small-scale production or small batches of customized products. It is often used in small and medium-sized enterprises or workshops with limited production scale.

According to the product specification, PU sandwich panel lines can be divided into lines for thin panels and lines for thick panels. Lines for thin panels are mainly used to produce PU sandwich panels with a thickness of 30-100mm, which are mostly used for interior partition walls, ceiling panels, or light-weight exterior walls of small buildings. This type of production line has higher requirements for the flatness and precision of the panels, and the foaming system needs to control the density of the foam core more accurately to ensure the light weight and good thermal insulation performance of the panels. Lines for thick panels are used to produce PU sandwich panels with a thickness of 100-200mm or more, which are mainly used for external walls of large industrial buildings, cold storage, and thermal insulation projects with high requirements. This type of production line has a longer laminating and cooling conveyor unit to ensure the full foaming and curing of the thick foam core, and the cutting equipment is also equipped with a more powerful cutting blade to ensure the smoothness of the cutting surface.

According to the foaming technology, PU sandwich panel lines can be divided into high-pressure foaming lines and low-pressure foaming lines. High-pressure foaming lines adopt high-pressure foaming technology, where the raw materials are mixed at a high pressure (usually 150-200 bar) in the mixing head, which ensures that the raw materials are mixed more fully and uniformly, resulting in a PU foam core with uniform density, fine pores, and excellent performance. This type of production line has high production efficiency and stable product quality, and is suitable for producing high-performance PU sandwich panels used in demanding application scenarios, such as cold storage, industrial insulation, and high-rise buildings. Low-pressure foaming lines adopt low-pressure foaming technology, where the raw materials are mixed at a low pressure, and the equipment structure is relatively simple, with low investment and maintenance costs. This type of production line is suitable for producing general-purpose PU sandwich panels with relatively low performance requirements, such as interior decoration panels and temporary buildings.

In addition, according to the type of facing materials, PU sandwich panel lines can also be divided into metal facing PU sandwich panel lines and non-metal facing PU sandwich panel lines. Metal facing PU sandwich panel lines are mainly used to produce sandwich panels with metal facing materials, such as galvanized steel, galvalume steel, or aluminum sheets, which are widely used in various construction and industrial fields due to their excellent structural strength and durability. Non-metal facing PU sandwich panel lines are used to produce sandwich panels with non-metal facing materials, such as PVC, fiber-reinforced plastic (FRP), or gypsum boards, which are mainly used in interior decoration, medical, and food processing industries where corrosion resistance, hygiene, and beauty are required.

The application range of PU sandwich panel lines is extremely wide, covering construction, cold storage and refrigeration, industrial insulation, transportation, and other fields, which is closely related to the excellent performance of the PU sandwich panels produced by the lines. In the construction industry, PU sandwich panels produced by the lines are widely used in external walls, internal partitions, roofs, and ceilings of various buildings, including industrial warehouses, logistics centers, commercial buildings, residential buildings, and public facilities. The thermal insulation performance of PU sandwich panels can effectively reduce the energy consumption of buildings, improve indoor comfort, and meet the requirements of building energy conservation. The light weight of the panels can reduce the load of the building structure, reducing the construction cost, while the quick installation feature can shorten the construction period, improving the construction efficiency. For example, in the construction of large industrial warehouses and logistics centers, PU sandwich panels are often used as external walls and roofs due to their high structural strength, good thermal insulation, and quick installation, which can greatly shorten the construction period and ensure the normal use of the warehouse in a short time.

In the cold storage and refrigeration industry, PU sandwich panels produced by the lines are essential materials for the construction of cold storage, freezers, and refrigerated warehouses. The PU foam core has excellent thermal insulation performance, with a low thermal conductivity, which can effectively prevent the transfer of external heat into the cold storage, maintaining a stable low-temperature environment inside the cold storage. At the same time, the PU foam core has good water resistance and moisture resistance, which can avoid the problem of foam core degradation caused by moisture, ensuring the long-term thermal insulation performance of the cold storage. The metal facing materials of the PU sandwich panels have good corrosion resistance, which can adapt to the humid and low-temperature environment inside the cold storage. In addition, the PU sandwich panels have good structural strength, which can bear a certain load, making them suitable for the construction of large-scale cold storage and refrigerated warehouses. The PU sandwich panel lines can produce cold storage-specific panels with different thicknesses and performance according to the temperature requirements of the cold storage (such as low-temperature cold storage, medium-temperature cold storage, or fresh-keeping cold storage), meeting the diverse needs of the cold storage industry.

In the industrial insulation field, PU sandwich panels produced by the lines are widely used in the insulation of industrial equipment, pipelines, and workshops. Many industrial production processes require high-temperature or low-temperature environments, and the insulation of equipment and pipelines is crucial to ensuring the normal operation of production and reducing energy consumption. PU sandwich panels have excellent thermal insulation performance and can be cut into different shapes according to the shape of equipment and pipelines, realizing close fitting and effective insulation. For example, in petrochemical, power generation, and chemical industries, PU sandwich panels are used to insulate high-temperature pipelines and equipment, preventing heat loss and ensuring the safety of production operations. In addition, PU sandwich panels have good sound insulation performance, which can be used in the sound insulation of industrial workshops, reducing the impact of noise on the surrounding environment and the physical and mental health of operators.

In the transportation field, PU sandwich panels produced by the lines are used in the manufacturing of vehicles such as refrigerated trucks, caravans, and railway carriages. Refrigerated trucks need to maintain a stable low-temperature environment during transportation to ensure the quality of perishable goods, and PU sandwich panels are used as the insulation layer of the truck body due to their excellent thermal insulation performance and light weight. The light weight of the panels can reduce the fuel consumption of the refrigerated truck, improving the transportation efficiency and reducing the transportation cost. Caravans and railway carriages use PU sandwich panels as the wall and roof materials, which not only have good thermal insulation and sound insulation performance, but also are light in weight and high in strength, improving the comfort and safety of the vehicle. In addition, PU sandwich panels have good corrosion resistance, which can adapt to the harsh outdoor environment during transportation, extending the service life of the vehicle.

In addition to the above fields, PU sandwich panel lines also have applications in other fields, such as the construction of temporary buildings, prefabricated houses, medical and food processing workshops, and marine engineering. Temporary buildings and prefabricated houses require quick installation, disassembly, and repeated use, and PU sandwich panels produced by the lines meet these requirements due to their light weight, quick installation, and good performance. Medical and food processing workshops have high requirements for hygiene, corrosion resistance, and thermal insulation, and non-metal facing PU sandwich panels produced by the lines can meet these requirements, ensuring a clean and stable production environment. Marine engineering requires materials with good corrosion resistance and moisture resistance, and PU sandwich panels with special anti-corrosion treatment can be used in the insulation and decoration of marine buildings and equipment, adapting to the harsh marine environment.

With the continuous development of the global construction industry, cold storage and refrigeration industry, and industrial insulation industry, the demand for high-quality PU sandwich panels is increasing, which also promotes the continuous upgrading and development of PU sandwich panel lines. In the future, PU sandwich panel lines will develop in the direction of higher automation, intelligence, energy conservation, and environmental protection. The intelligent control system will be more advanced, realizing functions such as remote monitoring, fault prediction, and automatic parameter optimization, further improving the production efficiency and product quality stability of the line. The production line will adopt more environmentally friendly raw materials and technologies, reducing environmental pollution and energy consumption, meeting the global requirements for sustainable development. At the same time, the production line will be more flexible and versatile, able to produce more types and specifications of PU sandwich panels to meet the increasingly diverse market demands. The development of PU sandwich panel lines will further promote the popularization and application of PU sandwich panels, making greater contributions to the development of various related industries.

« PU Sandwich Panel Line » Post Date: 2023/7/19

pu sandwich panel machine