Precision Die Casting Moulds | High-Tolerance Solutions by Sino

Sino Die Casting, a high-tech enterprise established in 2008 and based in Shenzhen, China, is a leading provider of precision die casting moulds, integrating design, processing, and production to deliver high-quality solutions for clients across industries such as automotive, new energy, robotics, and telecommunications. With a focus on high-precision manufacturing, our precision die casting moulds are engineered to produce complex, dimensionally accurate parts with consistent quality, supporting production scales from rapid prototyping to mass production. Exported to over 50 countries and regions and backed by ISO 9001 certification, our precision die casting moulds are trusted for their durability, precision, and performance, making us a flexible and reliable partner for businesses worldwide. A precision die casting mould is a specialized tool used in the die casting process, where molten metal is forced into the mould cavity under high pressure, solidifying into the desired shape. The quality of the die casting mould directly impacts the quality of the final part—its dimensional accuracy, surface finish, and structural integrity—making precision in mould design and manufacturing paramount. At Sino Die Casting, our precision die casting moulds are crafted using advanced materials and manufacturing techniques, ensuring that they can withstand the high pressures, temperatures, and repetitive cycles of die casting production while maintaining tight tolerances. One of the key elements of our precision die casting moulds is the use of high-grade materials, selected for their strength, wear resistance, and thermal stability. We primarily use tool steels such as H13, P20, and S7, which offer excellent hardness and toughness, making them ideal for withstanding the harsh conditions of die casting, including repeated exposure to molten metal (often aluminum, zinc, or magnesium) at temperatures up to 700°C. These materials are heat-treated to enhance their mechanical properties, ensuring that the moulds maintain their dimensional stability over thousands or even millions of production cycles. Additionally, we use surface treatments such as nitriding and chrome plating to further improve wear resistance and reduce friction, extending the mould’s lifespan and reducing maintenance requirements. The design of our precision die casting moulds is a collaborative process that involves close engagement with clients to understand their part requirements, production volumes, and material choices. Our team of experienced mould designers uses advanced computer-aided design (CAD) software, such as SolidWorks and AutoCAD, to create detailed 3D models of the mould, incorporating features such as cavities, cores, runners, gates, cooling channels, and ejection systems. The design process also includes simulation using computer-aided engineering (CAE) software to analyze molten metal flow, cooling efficiency, and potential defects such as air traps or shrinkage, allowing for design optimizations before manufacturing begins. This proactive approach ensures that the mould is not only precise but also optimized for efficiency, reducing cycle times and minimizing part defects. The manufacturing of our precision die casting moulds leverages state-of-the-art CNC machining technologies, which are critical for achieving the tight tolerances and complex geometries required. Our CNC machining capabilities include high-speed milling, electrical discharge machining (EDM), wire EDM, and grinding, each used for specific aspects of mould production. High-speed CNC milling is used to machine the mould base and cavity, achieving surface finishes as smooth as Ra 0.8 μm and tolerances as tight as ±0.001 mm. EDM and wire EDM are employed for intricate features that are difficult to machine with traditional tools, such as thin walls, sharp corners, and small holes, ensuring precision even in the most complex areas. Grinding processes are used to achieve flatness and parallelism in mould plates, ensuring proper alignment and preventing flash (excess material) in the final parts. Quality control is integral to every stage of precision die casting mould production, and our ISO 9001 certification ensures that we adhere to strict standards. We implement rigorous inspection protocols, starting with incoming material testing to verify chemical composition and mechanical properties. During manufacturing, in-process inspections using coordinate measuring machines (CMMs), optical comparators, and surface roughness testers ensure that each mould component meets design specifications. Final inspection of the assembled mould includes testing for proper alignment, cooling channel functionality, and ejection system operation, ensuring that the mould is ready for production. This attention to quality is critical because even minor imperfections in the mould can lead to defects in thousands of die cast parts, making precision in mould manufacturing a cornerstone of reliable production. Our precision die casting moulds are designed to accommodate various die casting processes, including hot chamber die casting (for zinc and magnesium) and cold chamber die casting (for aluminum), ensuring versatility across different materials and part types. For hot chamber applications, where the mould is in close proximity to the molten metal, our moulds are designed with enhanced cooling systems to manage heat and prevent premature wear. For cold chamber die casting, which involves higher pressures, our moulds feature robust construction to withstand the increased force, ensuring dimensional stability. Additionally, our moulds can be customized with features such as interchangeable inserts, allowing for quick design changes or part variations without the need for a complete new mould, reducing lead times and costs for clients. We offer end-to-end services for precision die casting moulds, from design and manufacturing to maintenance and repair,