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About Us

Ningbo Jinhui Precision Casting Co., Ltd. (Ningbo Minghui Metal Technology Co., Ltd.) is China Custom Rail Transit Casting Factory and OEM brake system castings Manufacturers. The company is a joint-stock enterprise that integrates casting, precision forging, and CNC machining. The company was founded in 2000 and is located in Xizetang Industrial Zone, Xianxiang Town, Xiangshan County, Ningbo City. The company is more than 20 kilometers away from Dongfang Port - Beilun Port, 5 kilometers away from Yongguan Expressway, and 50 kilometers away from Ningbo International Airport, making transportation very convenient. The company has a casting factory and a forging factory. The company has been awarded honorary titles such as "National High tech Enterprise," National "Specialized New Special Precision" Small Giant Enterprise, and Zhejiang Provincial High tech Enterprise Research and Development Center.
Four Advantages of Warm Core Box Shell Forming Process.

Technological Advantages

Honor

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    Normalizing Furnace System With Temperature Control For Multiple Heating Zones (Jinhui)
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    A Temperature Controlled Furnace System With Multiple Heating Zones (Jinhui)
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    An Intelligent Heat Treatment System (Jinhui)
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    An Intelligent Recycling System For Casting Wax Patterns (Jinhui)
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    Pouring System For Railway Spring Head Castings (Jinhui)
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    Pouring System For Track Shoe Castings Used In Construction Machinery (Jinhui)
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    Pouring System For Railway Diagonal Wedge Castings (Jinhui)
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    Large Span Translational And Rotary Robotic Arm (Jinhui)
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    A Clamping Device (Utility Model Patent Certificate) Jinhui
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    Utility Model Patent Certificate (Jinhui)
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    Pouring System For Buffer Castings For Railway Trains (Minghui)
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    Pouring System For Buffer Castings For Railway Trains (Minghui)

News

Industry knowledge

1. Overview of rail transit castings
Rail transit castings are an important part of the skeleton of the rail transit system and are directly related to the safe operation of rail vehicles. In transportation systems such as railways and subways, castings such as axles, hubs, wheels and guide rails perform important functions such as support, guidance, and transmission. These castings are designed and manufactured to strict standards to ensure system reliability, safety and economy.
The performance of castings directly affects the operating efficiency and cost of rail transit systems. In modern rail transit systems, the material selection, design, and manufacturing processes of rail castings have undergone continuous innovation and development to adapt to the operational needs of high speed, large load, and long life. The casting manufacturing industry continues to improve the strength, durability and adaptability of castings through material optimization, design innovation and other means to meet the requirements of different operating environments.

2.Quality control and testing technology
Quality control of rail transit castings is the cornerstone of ensuring system safety and operational reliability. Castings may be affected by internal defects, pores, cracks and other problems during the production process, which may lead to accidents and failures during use. Therefore, it is crucial to adopt advanced quality control and inspection technology.
Ultrasonic testing is a commonly used non-destructive testing technology that detects internal defects through the propagation of sound waves in materials. Magnetic particle testing can detect cracks and defects on the surface of castings. The application of these technologies on the production line can achieve comprehensive inspection of castings and ensure product quality. In addition, the introduction of automation and information technology, such as machine learning and artificial intelligence, can improve the efficiency and accuracy of detection and make quality control more reliable.
Establishing a sound quality management system is also a key part of ensuring the quality of castings. From the procurement of raw materials, the monitoring of the production process to the delivery of the final product, strict quality management standards and processes are required. By continuously optimizing and updating the quality management system, the consistency and stability of products can be improved, the risk of quality fluctuations can be reduced, and the long-term stable operation of the rail transit system can be ensured.