In the field of architectural hardware, door and window handles may seem small, but they carry an important responsibility for safety and convenience. At Zhianda Steel & Aluminium Products Co., Ltd, we produce the key to door and window handles – aluminium ingots – which have a unique origin and significant advantages, and together they contribute to the high quality of our products.
The aluminium ingots we use are high-quality materials that comply with national standards, and behind them is a rigorous selection process. We adhere to extremely stringent standards, starting with the selection of suppliers. We thoroughly investigate the background of our suppliers, review their qualifications, and prefer to work with reputable, sizable and experienced suppliers, especially those that have passed quality management system certifications such as ISO 9001, as this indicates their ability to consistently produce aluminium ingots that meet standards. Furthermore, we regularly conduct on-site inspections of our suppliers’ production sites to gain a detailed understanding of their raw material procurement channels, production processes and quality control measures. Whether the production equipment is advanced and well-maintained, and whether the production environment meets standards are all key factors in our assessment, so as to ensure that they can continue to provide us with high-quality aluminium ingots in a stable manner. At the same time, we have established a comprehensive supplier performance evaluation system, which regularly evaluates suppliers from multiple dimensions such as the quality of aluminium ingots, delivery time, price, and service. For underperforming suppliers, we will require them to make rectifications or directly terminate the cooperation, in order to fully ensure the quality and stability of the supply of raw materials.
These aluminium ingots themselves have excellent characteristics. In terms of chemical composition, the national standard clearly stipulates the content of various elements in aluminium ingots. Our aluminium ingots have a high aluminium content and strictly control the content of impurity elements such as iron, silicon and copper, which lays the foundation for their basic performance. From the perspective of physical properties, indicators such as hardness and density all meet the standards. The right hardness means that the door and window handles will not deform easily during frequent use, while the standard density gives the product an excellent feel. Moreover, the aluminium ingots we use are extremely pure, having been refined to remove almost all impurities. This gives the door and window handles a smooth surface that looks and feels high-quality. The microscopic crystal structure is uniform and detailed, with consistent properties in all directions. When made into door and window handles, it can evenly withstand external forces, effectively dispersing stress during daily use or accidental impacts, greatly enhancing the durability of the product. Furthermore, this type of aluminium ingot is highly malleable, which greatly facilitates our production process. We can precisely cast it into various ergonomic door and window handle shapes according to different needs, whether it is a delicate handle for home use or a large handle for commercial buildings. We can achieve perfect designs to meet the diverse needs of users.
To ensure the quality of aluminium ingots, we have put a lot of effort into raw material inspection and testing. Each batch of aluminium ingots entering the factory must undergo rigorous inspection, including basic items such as appearance, size, and weight, and more importantly, chemical composition analysis and physical performance testing. We take representative samples from each batch of aluminium ingots for testing according to scientific and reasonable sampling standards. For unqualified batches, we resolutely follow the process to prevent them from entering the production process. In addition, we regularly send samples of aluminium ingots to authoritative third-party testing institutions for testing. We use their objective and authoritative test results to further verify quality and build a strong defence for product quality.
In terms of quality traceability and management, we have established a detailed quality file for each batch of aluminium ingots, covering the purchase date, supplier information, inspection reports, usage status, etc., and achieve full traceability through batch management. In the event of a product quality issue, the batch of problematic raw materials can be quickly located and dealt with in a timely manner. At the same time, we regularly conduct statistical analysis of raw material inspection data to understand quality trends and patterns, identify potential risks in advance and take preventive measures.
All of this is inseparable from the efforts of our staff. We attach great importance to the training and management of our employees, strengthen training on quality awareness, so that employees have a deep understanding of the importance of raw material quality to the product, and enhance their sense of responsibility. At the same time, we regularly organise testing personnel to participate in skills training, so that they become proficient in testing equipment and methods, and encourage them to learn and update their knowledge to improve the accuracy of testing results. Furthermore, through a comprehensive assessment and incentive mechanism, raw material quality control work is included in performance appraisals to motivate employees to proactively ensure raw material quality.
In short, the aluminium ingots used by our company to produce door and window handles, whether it is their strict quality that meets national standards or their own material characteristics, together with comprehensive and meticulous quality control measures, have jointly created the excellent quality of our door and window handles, providing safe, comfortable and durable products for users around the world.