Aluminum alloy industrial sliding door: exquisite craftsmanship creates excellent quality

In the field of industrial construction, aluminum alloy industrial sliding door is highly favored for its excellent performance and wide applicability. This article will explore the production process of aluminum alloy industrial sliding door in depth, and take you to understand every key link from raw material selection to finished product delivery, so as to provide you with a strong reference for choosing high-quality products.

I. Selection of raw materials
(I) Aluminum alloy material
Aluminum alloy is the main raw material of aluminum alloy industrial sliding door, and its quality directly affects the overall performance of the door. High-quality aluminum alloy has the characteristics of high strength, high toughness, corrosion resistance and good welding performance. Usually, industrial sliding door uses aviation-grade aluminum alloy, which contains appropriate amounts of copper, magnesium, silicon and other elements. After precise proportioning and advanced smelting process, its excellent mechanical properties and durability are ensured. For example, the tensile strength of some high-performance aluminum alloys can reach more than 250MPa, and the elongation can be maintained at 10%-15%, so that it can maintain stable performance in various harsh environments, not easy to deform and corrode, and extend the service life of the door.
(II) Polyurethane foam material
In order to meet the thermal insulation needs of industrial buildings, the door panels of aluminum alloy industrial sliding doors are usually filled with polyurethane foam material. Polyurethane foam has excellent thermal insulation performance and low thermal conductivity, which can effectively prevent heat transfer, thereby reducing the energy consumption of buildings. During the production process, the polyurethane foam material is foamed at high pressure inside the door panel through professional equipment to ensure that it is filled evenly and densely, and is tightly combined with the aluminum alloy door panel to form a whole, which not only improves the thermal insulation performance of the door panel, but also enhances its structural strength and sound insulation effect. High-quality polyurethane foam material can make the thermal insulation performance of the door reach a U value of about 0.84W/m²・℃, effectively reduce heat loss, and provide good energy-saving effects for industrial buildings.
(III) Hardware accessories
Hardware accessories are an indispensable component of aluminum alloy industrial sliding doors, and their quality is related to the smoothness and safety of the door’s operation. Mainly including hinges, guide rails, pulleys, torsion springs, etc.
Hinge: Made of 2.0mm thick hot-dip galvanized cold-rolled steel plate, the thickness of the galvanized layer is greater than 28μm, with good anti-rust performance and high strength, able to bear the weight of the door panel and maintain a stable connection, ensuring that the door is not easy to loosen or deform during frequent opening and closing, and ensuring the long-term normal use of the door.
Guide rail: Made of 2mm thick hot-dip galvanized steel plate rolled into a 3-inch industrial door special guide rail, its cross-sectional shape has an anti-unhooking design, which can prevent the guide wheel from derailing during operation and ensure the smooth operation of the door body. The guide rail guard is also made of 2mm thick hot-dip galvanized steel plate rolled. The guard is equipped with a slot for the door side sealing rubber and a mounting hole connected to the guide rail, which facilitates the installation of the sealing strip and enhances the sealing performance of the door body.
Pulley: Use Φ72mm industrial door special guide wheel, the guide wheel material is wear-resistant and contains roller bearings, which runs smoothly and noiselessly. Even after long-term use, there will be no obvious wear and deformation, ensuring smooth lifting and lowering of the door body.
Torsion spring: Designed and manufactured based on the door heavy load software, the torsion spring is made of 60si2Mn imported spring steel to ensure that its service life exceeds 80,000 cycles. The torsion spring shaft is a 25.4 solid round steel, and a torsion spring break protection device is installed on the balance shaft. When the torsion spring breaks, it can effectively prevent the door panel from falling and ensure the safety of personnel and equipment.

2. Manufacturing process
(I) Door panel manufacturing
Aluminum alloy sheet cutting: According to the design size and specifications of the door, high-precision CNC cutting equipment is used to cut the aluminum alloy sheet to ensure that the cutting size is accurate and the error is controlled within a very small range. The edges of the cut sheet are neat and smooth, without burrs and deformation, laying a good foundation for subsequent processing.
Profile extrusion and forming: After the cut aluminum alloy sheet is heated to a certain temperature, it is placed in a professional extrusion die. A large extruder applies huge pressure to make the aluminum alloy material flow in the die and form the required door panel shape and structure, such as a groove shape with reinforcing ribs. This process requires precise control of process parameters such as temperature, pressure and extrusion speed to ensure that the extruded aluminum alloy profile is accurate in size, regular in shape, dense in internal structure, and has good mechanical properties and surface quality.
Polyurethane foam filling: The pre-treated aluminum alloy profile is placed in the foaming mold, and then the polyurethane foam material is injected into the cavity inside the profile through a high-pressure device. During the foaming process, the polyurethane material undergoes a chemical reaction, gradually expands and fills the entire cavity, and is tightly combined with the aluminum alloy profile. After the foaming is completed, after a period of curing and maturation, the polyurethane foam achieves the best thermal insulation performance and strength. This process enables the door panel to have excellent thermal insulation, sound insulation and overall strength, while reducing the deadweight of the door panel and facilitating the lifting and lowering operation of the door body.
Surface treatment and assembly: The surface of the foamed door panel is cleaned and polished to remove impurities and unevenness on the surface, and then surface treatment is performed according to design requirements, such as spraying high-performance fluorocarbon paint or anodizing. These surface treatment processes can not only make the door panels have beautiful appearance and good decorative properties, but also further improve their corrosion resistance, UV resistance, and aging resistance, ensuring that the door panels maintain good appearance and performance during long-term use. Finally, the treated door panels are assembled with the aluminum alloy frame through high-strength bolts, nuts and other connectors to form a complete door panel unit, and ensure that the connection between the door panels is tight and firm, and the sealing performance is good.
(II) Hardware accessories processing and installation
Precision stamping and processing: For stamping parts in hardware accessories, such as hinges, guide rail guards, etc., advanced CNC stamping equipment is used for processing. Through high-precision molds and strict process control, the dimensional accuracy and shape accuracy of the stamping parts are ensured, and the material thickness tolerance is controlled within ±0.05mm. The surface of the stamped parts is smooth and flat, without obvious wrinkles, scratches, deformation and other defects, and the size consistency is good, the interchangeability is high, and it is convenient for subsequent assembly and installation.
Welding and assembly: For hardware accessories that need to be welded, such as the connectors of the guide rails, the brackets of the balancing system, etc., experienced welding technicians use professional welding equipment and processes to operate. During the welding process, strictly control the welding parameters, such as current, voltage, welding speed, etc., to ensure that the weld is full and firm, and the welding quality meets the requirements of relevant standards, without defects such as false welding, leaking welding, and slag inclusion. After welding is completed, the weld is polished to make its surface smooth and flat, and the transition with the parent material is natural, which not only improves the appearance quality of the product, but also enhances the corrosion resistance of the weld. Then, the processed hardware accessories are assembled and debugged according to the requirements of the design drawings to ensure that the matching clearance between the components is appropriate, the movement is flexible, and the operation is stable and reliable.
Installation and debugging: During the overall assembly process of the aluminum alloy industrial sliding door, the processed hardware accessories are installed to the corresponding positions. For example, firmly install the guide rails on the walls on both sides of the door opening, and ensure that the verticality and parallelism of the guide rails meet the requirements, so as to provide reliable track support for the smooth operation of the door body; install the hinges between the door panel and the door frame, and adjust the angle and position of the hinges so that the door panel can be opened and closed flexibly; install the torsion spring on the balance shaft, and adjust the preload precisely according to the weight and size of the door body to achieve a good balance of the door body, reduce the burden on the motor, and ensure that the door body is light and labor-saving during the lifting process, and runs smoothly. After all hardware accessories are installed, perform multiple no-load and load debugging to check the operating status of the door body, the connection of various components, and whether the functions of various protective devices are normal, and promptly discover and solve existing problems to ensure that the door body can operate safely, stably and reliably.
(III) Installation of the balancing system and drive system
Installation of the torsion spring balancing system: According to the weight and size of the door body, accurately calculate and select the appropriate torsion spring specifications and quantity. Install the torsion spring on the balance shaft to ensure that the installation position of the torsion spring is accurate and firmly fixed. The preload of the torsion spring is adjusted by professional equipment to achieve the best balance between the elastic force of the torsion spring and the weight of the door body. The precisely adjusted torsion spring balance system can effectively balance the weight of the door body during the lifting process, so that the door body can remain stable at any position, making it easy for operators to open and close the door body, while also reducing the load on the drive system and extending its service life.
Installation and debugging of the drive system: The drive system usually consists of a motor, a control box, a wire rope, a pulley, etc. Install the motor in a suitable position above the door body and connect it precisely to the drive shaft to ensure that the output shaft of the motor is well coaxial with the drive shaft to avoid vibration and noise during operation. The control box is installed in a position that is convenient for operation and maintenance, and the electrical components inside it are connected and debugged according to the design requirements to ensure that the wiring of the control system is neat, the wiring is firm, the insulation is good, and various control functions are normal, such as the rise, fall, stop, limit and other operations of the door body. One end of the wire rope is fixed on the door body, and the other end is connected to the drive shaft by passing through the pulley block. The installation of the wire rope should ensure that its tightness is moderate, without twisting or knotting, and keep it in good lubrication during operation to reduce wear and increase its service life. After the drive system is installed, it is debugged and run several times to check whether the door body’s running speed, stability, synchronization and other indicators meet the requirements. At the same time, the various parameters of the control system are optimized and adjusted to ensure that the drive system can stably and reliably drive the door body for lifting and lowering operations to meet the needs of industrial production.
(IV) Configuration of the sealing system
Selection and installation of sealing strips: In order to ensure the sealing performance of the aluminum alloy industrial sliding door, prevent dust, air, water vapor, etc. from entering the room through the gap between the door body and the door frame, affecting the indoor environment and production process, high-quality sealing strips are installed around and at the bottom of the door body. The sealing strip is usually made of EPDM rubber, which has good elasticity, weather resistance, aging resistance and corrosion resistance, and can maintain good sealing performance during long-term use. When installing the sealing strip, first clean the installation parts of the door body and door frame to ensure that there are no impurities, oil and moisture on the surface, and then paste or clamp the sealing strip in the corresponding position according to the design requirements, so that it fits tightly with the door body and door frame to form a tight sealing defense line. The installation of the sealing strip should be flat and firm, without ups and downs, gaps and breaks, to achieve the best sealing effect.
Special design of the bottom sealing device: In addition to the conventional sealing strip, some high-quality aluminum alloy industrial sliding doors also install specially designed sealing devices at the bottom of the door body, such as airbags and sealing wings. When the door body is closed, the airbag automatically inflates and contacts closely with the ground to form a tighter seal. At the same time, it can also play a buffering role to reduce the collision and wear between the door body and the ground; the sealing wing can form a dynamic sealing area between the bottom of the door body and the ground, and automatically adjust the sealing state as the door body rises and falls, further enhancing the sealing performance and dust and windproof effects of the door body. The design and application of these special sealing devices enable aluminum alloy industrial sliding doors to maintain superior sealing performance in various complex industrial environments, providing good protection for industrial production.

3. Quality control and inspection
(I) Raw material inspection
In the production process of aluminum alloy industrial sliding doors, quality control of raw materials is crucial. Before the raw materials are put into storage, they need to be strictly inspected and tested, including chemical composition analysis, mechanical properties testing, appearance quality inspection, etc. For aluminum alloy raw materials, it is necessary to ensure that their alloy composition meets the design requirements, there are no impurities and defects, and the mechanical properties such as tensile strength, yield strength, and elongation meet the standards; polyurethane foam materials should be checked for their foaming density, thermal conductivity, closed cell rate and other indicators to meet the insulation performance requirements; hardware accessories should be checked for their materials, specifications, dimensional accuracy, surface treatment quality and other aspects to meet the relevant standards and procurement contract requirements. Only raw materials that have passed strict inspection can be put into production and use, ensuring product quality from the source.
(II) Production process monitoring
In each link of the production process, quality monitoring points are set up to monitor and inspect the production process in real time. For example, in the process of door panel production, the cutting size of aluminum alloy plates, the shape and size of profile extrusion, the filling quality of polyurethane foam, the effect of surface treatment, etc. are combined with random inspection and full inspection to ensure that each process meets the process requirements and quality standards; in the process of hardware accessories processing and installation, the dimensional accuracy, welding quality, and assembly tightness of stamping parts are strictly inspected to timely discover and correct quality problems in the production process, avoid unqualified products from flowing into the next process, and ensure the overall quality stability of the product.
(III) Finished product inspection and testing
Appearance quality inspection: Carefully inspect the appearance of the finished aluminum alloy industrial sliding door, including the flatness, color uniformity, coating adhesion, scratches, bumps, deformation and other defects on the surface of the door body; whether the joint gaps between the door panels are uniform and tight, and whether the sealing strips are installed flat and firmly. Appearance quality not only affects the beauty of the product, but also reflects the sophistication of the production process and the quality level of the product to a certain extent. Therefore, it must be inspected strictly in accordance with relevant standards and customer requirements to ensure that the appearance quality meets the qualified standards.
Performance test: A series of performance tests are conducted on the finished door, including opening and closing performance test, running stability test, sealing performance test, thermal insulation performance test, wind resistance performance test, safety protection device reliability test, etc. By simulating the actual use conditions, the door body is opened and closed multiple times to check whether it runs smoothly, whether there is any jamming or abnormal noise, and whether the various components work well together; professional testing equipment is used to test the sealing and thermal insulation performance of the door body to ensure that it meets the sealing index and thermal insulation effect required by the design; a certain wind pressure is applied to the door body to test its wind resistance performance and verify the stability and safety of the door body in a strong wind environment; functional tests are conducted on safety protection devices such as airbags, wire rope anti-breaking devices, torsion spring anti-breaking protection devices, etc. to ensure that they can play a role quickly and reliably in abnormal situations to ensure the safety of personnel and equipment.
Factory inspection and issuance of certificates: After strict appearance quality inspection and performance testing, qualified aluminum alloy industrial sliding door products will undergo final factory inspection. After confirming that the quality indicators of the products meet the relevant standards and contract requirements, a product certificate will be issued with a detailed inspection report and product instructions. The product certificate is not only a document proving the quality of the product, but also an important reference for customers during use and maintenance. At the same time, the products leaving the factory are properly packaged and protected to ensure that they are not damaged during transportation and storage, and to ensure that the products can be delivered to customers intact.

4. Advantages and applications of aluminum alloy industrial sliding doors
(I) Advantages
Strong and durable: The high-quality aluminum alloy material and exquisite production process make the aluminum alloy industrial sliding door have high strength and good impact resistance. It can withstand various external forces in industrial production, is not easy to deform or damage, has a long service life, and reduces the equipment renewal cost of the enterprise.
Excellent thermal insulation performance: The filling of polyurethane foam material and the good sealing system design effectively prevent the transfer of heat, so that the door body has excellent thermal insulation performance, which helps to maintain the temperature stability inside the industrial building, reduce energy consumption, reduce the operating costs of the enterprise, and also help to improve the comfort of the indoor working environment.
Beautiful and generous: The surface of the aluminum alloy industrial sliding door has been finely processed, such as powder spraying, anodizing and other processes, which can provide a variety of beautiful color options and good decorative effects, meet the requirements of different industrial buildings for appearance, and enhance the overall image and brand value of the enterprise.
Smooth and reliable operation: Precision-processed hardware accessories, advanced balancing system and drive system ensure that the door body runs smoothly and smoothly during the lifting process, without noise or jamming, flexible opening and closing, easy operation, improved work efficiency, and also reduced the risk of production interruption caused by door body operation failure.
High safety performance: Equipped with a variety of safety protection devices, such as airbags, wire rope anti-breaking devices, torsion spring anti-breaking protection devices, manual/automatic switching devices, etc., it can timely sense abnormal conditions and take corresponding protective measures during the operation of the door body, effectively prevent the occurrence of safety accidents such as door falling and pinching personnel, ensure the safety of personnel and equipment, and create a safe and reliable production environment for enterprises.
(II) Application field
Industrial plant: Aluminum alloy industrial sliding doors are widely used in various industrial plants, such as automobile manufacturing plants, machinery processing plants, electronics factories, chemical plants, etc. In these places, the high strength and good sealing performance of the door body can effectively prevent external dust, debris, harmful gases, etc. from entering the factory, maintain the cleanliness of the indoor air, and at the same time, its excellent thermal insulation performance helps to maintain a constant temperature environment in the factory, reduce energy consumption, provide stable environmental conditions for the production process, and improve product quality and production efficiency.
Warehouse logistics center: In warehouses and logistics centers, the large size and high opening speed of aluminum alloy industrial sliding doors can meet the needs of rapid loading and unloading of goods and improve logistics efficiency. Its sturdy and durable performance can withstand collisions and friction during frequent cargo handling and loading and unloading, while its good sealing performance helps prevent the goods in the warehouse from getting damp and contaminated, protect the quality and safety of the goods, and reduce the company’s inventory loss.
Cold storage: For places such as cold storage that require strict temperature control, the thermal insulation performance of aluminum alloy industrial sliding doors is crucial. The door body can effectively isolate the heat exchange inside and outside the cold storage, reduce the loss of cold capacity, and maintain the stability of the low temperature environment inside the cold storage, thereby reducing the energy consumption of the cold storage and extending the service life of the cold storage. At the same time, its sealing performance can prevent moisture from the outside air from entering the cold storage, avoid condensation inside the cold storage and affect the storage quality of goods, and provide reliable protection for cold chain logistics.
Food processing industry: In food processing workshops and food warehouses, the hygienic performance and easy-to-clean characteristics of aluminum alloy industrial sliding doors meet the strict requirements of the food industry. The surface of the door is smooth and flat, without dead corners, and it is not easy to breed bacteria and microorganisms, which is convenient for cleaning and disinfection, ensuring the sanitation and safety of the food production environment, preventing food from being contaminated, and complying with the requirements of relevant food hygiene laws and standards to ensure food safety.
Medical facilities: Medical facilities such as hospitals and pharmaceutical factories have extremely high requirements for environmental cleanliness and safety. The sealing performance and filtering performance of aluminum alloy industrial sliding doors can effectively prevent harmful substances such as dust, bacteria, viruses, etc. from entering the room, maintaining the cleanliness and sterility of the medical environment, and the low noise characteristics during its operation are also conducive to creating a quiet and comfortable medical environment, which is conducive to the recovery of patients and the smooth progress of medical work.

5. Summary
The production process of aluminum alloy industrial sliding doors is a complex and precise process, involving multiple key links such as raw material selection, production process, quality control and inspection. From the careful selection of high-quality aluminum alloy materials, polyurethane foam materials and hardware accessories, to the rigorous production process such as door panel production, hardware accessories processing and installation, balance system and drive system installation and sealing system configuration, to strict quality control and inspection, each link embodies the wisdom and hard work of professional technicians and production workers, and together forges the excellent product quality of aluminum alloy industrial sliding doors.
Its many advantages such as durability, excellent thermal insulation performance, beautiful appearance, stable and reliable operation and high safety performance have made it widely used in the field of industrial buildings, providing reliable door solutions for various industrial production, warehousing logistics, cold chain logistics, food processing and medical facilities, helping enterprises improve production efficiency, reduce operating costs, ensure production safety and product quality, and also enhance the overall image and market competitiveness of enterprises.
In the future development, with the continuous advancement of science and technology and continuous innovation in production processes, aluminum alloy industrial sliding doors are expected to achieve greater breakthroughs in performance, appearance, intelligence, etc., further meet the ever-changing market demand, and make greater contributions to the development of the industrial construction field.