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In the world of modern architecture, steel glass windows & doors have become a hallmark of elegance, strength, and minimalist design. Their clean lines, slim profiles, and superior durability make them a preferred choice for both residential and commercial spaces. However, what truly defines the quality and performance of these products lies in the manufacturing process—specifically, the processing and treatment of steel.
At Shanghai Jindoor Technology Co., Ltd., the commitment to excellence begins at the core—with the steel itself.
1. Steel Selection: The Foundation of Strength
The production of high-quality steel glass windows & doors starts with selecting the right type of steel. Depending on the product application and design, galvanized steel, stainless steel, or cold-rolled carbon steel may be chosen. These materials are known for their tensile strength, corrosion resistance, and weldability.
Shanghai Jindoor sources premium-grade steel that meets international standards, ensuring a long service life and minimal maintenance for end users.
2. Cutting and Profiling: Achieving Precision
The first stage of steel processing involves precision cutting and profiling, where steel sheets or bars are cut into the required dimensions using laser cutting, CNC plasma cutting, or hydraulic shearing. Advanced machinery ensures accuracy within ±0.1 mm, allowing for tight tolerances and consistent fit during assembly.
Customized profiles for frames, mullions, and transoms are formed through roll forming or press braking, depending on design complexity.
3. Surface Treatment: Enhancing Corrosion Resistance
Raw steel, if untreated, is vulnerable to corrosion—especially in outdoor or coastal environments. Therefore, surface treatment is a critical step in the production process.
At Shanghai Jindoor, this often includes:
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Sandblasting or acid pickling to remove rust, oil, and impurities
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Galvanizing (hot-dip or electroplating) to add a protective zinc coating
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Powder coating or electrostatic painting for color customization and added resistance
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Optional passivation or ceramic coating for marine-grade performance
These treatments not only enhance longevity but also provide a smooth and attractive finish, complementing modern glass paneling.
4. Welding and Fabrication: Building the Framework
Steel components are then joined using TIG or MIG welding techniques, which provide strong and clean joints with minimal distortion. Skilled technicians at Shanghai Jindoor carefully align frames and reinforce critical areas to ensure structural stability.
During this phase, thermal break technology may also be incorporated—by inserting insulating materials within steel profiles—to improve energy efficiency and reduce thermal bridging in cold climates.
5. Surface Finishing and Quality Control
After welding, the frames undergo grinding and polishing to remove weld marks and ensure a seamless appearance. This is followed by rigorous inspection, where every steel glass window and door is checked for:
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Dimensional accuracy
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Coating thickness
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Surface defects
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Hinge, lock, and accessory compatibility
Only after passing a multi-point quality control system are the units approved for glazing and final assembly.
6. Integration with Glass and Accessories
The final step involves the installation of high-performance glass, including options such as:
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Tempered or laminated safety glass
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Double or triple glazing
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Low-E or UV-reflective coatings
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Sound-insulated glass panels
Glass is precisely sealed into the steel frames using silicone gaskets, spacers, and glazing beads, ensuring airtight performance.
Accessories like handles, locks, hinges, and drainage systems are also mounted with precision to complete the final product.
At Shanghai Jindoor Technology Co., Ltd., the creation of steel glass windows & doors is more than just fabrication—it’s a meticulous process of engineering, craftsmanship, and innovation. From steel processing to surface treatment and finishing, every detail is managed with care to ensure that the final product delivers unmatched aesthetic appeal, mechanical strength, and long-term durability.
http://www.jindoor.com
Shanghai Jindoor Technology Co., Ltd. -
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