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construction machinery casting Wholesale

About Us

Ningbo Jinhui Precision Casting Co., Ltd. (Ningbo Minghui Metal Technology Co., Ltd.) is China Custom construction machinery casting Factory and Wholesale construction machinery casting 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

  • Use pearl sand and environmentally friendly resin. Baozhu sand is spherical, with a smooth surface, high fire resistance, easy to collapse, good stability, and can be recycled. Environmentally friendly resin, free of phenol and formaldehyde, with national invention patents.

  • The sand shell has high thermal strength, and its strength gradually increases during the casting process, which can effectively ensure the dimensional accuracy of the casting; When the casting begins to cool and solidify, the strength of the sand shell rapidly decreases and has the characteristic of good collapsibility.

  • Production casting quality: The dimensional accuracy and surface quality are equivalent to that of water glass wax loss casting, but under the same production conditions, the mechanical properties are significantly better than that of water glass wax loss casting products.

  • Production efficiency: When the mold is ready to use, casting blanks can be obtained in 3-5 days, greatly shortening the delivery cycle, and the production cost is lower than that of the water glass wax loss process.


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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)


Industry knowledge

1.What is engineering machinery casting
Engineering machinery casting refer to components or parts used in construction and heavy machinery that are manufactured through casting processes. Casting is a manufacturing process in which a liquid material, often metal or plastic, is poured into a mold to solidify and take the shape of the mold. In the context of engineering machinery, metal casting is commonly used to produce robust and durable components.
a)Material Selection: Engineering machinery casting are crafted from a variety of materials, each chosen for its specific characteristics to meet the demands of the application. For instance:
Iron and Steel: These metals are frequently employed for their exceptional strength, making them ideal for components subjected to heavy loads and abrasive conditions.
Aluminum: Known for its lightweight nature and corrosion resistance, aluminum is often chosen for parts where weight reduction is a priority, such as in certain structural components or engine parts.
Alloys: Engineered alloys provide a balance of properties, combining the strength of metals like steel with specific desirable characteristics, such as increased resistance to corrosion or improved machinability.
b)Casting Processes: The choice of casting process is a critical aspect of manufacturing engineering machinery casting, with different methods offering distinct advantages:
Sand Casting: Widely used for its versatility, sand casting allows for the production of large, intricate parts. It involves creating a mold from compacted sand into which molten metal is poured.
Die Casting: Employing reusable molds called dies, this process is favored for its precision and rapid production rates. It is particularly suitable for parts with intricate geometries.
Investment Casting: Ideal for intricate and detailed parts, investment casting involves creating a wax pattern, coating it with a ceramic shell, and then melting away the wax to leave a cavity for molten metal.

2.Cross-industry applications of engineering machinery castings
Engineering machinery castings find applications across various industries due to their versatility, durability, and strength. Here are some cross-industry applications of engineering machinery castings:
a)Construction Industry: Excavators: In the construction industry, excavators are vital for tasks such as digging, trenching, and material handling. Engineering machinery castings play a crucial role in the construction of key components, including buckets, arms, and tracks. The robustness and durability of castings ensure that excavators can withstand the harsh conditions of construction sites, providing the necessary strength and longevity required for heavy-duty operations.
Bulldozers and Graders: Bulldozers and graders are essential for earthmoving and leveling tasks on construction sites. Castings are utilized in the manufacturing of components like blades, frames, and structural elements. The use of castings in these applications enhances the structural integrity of the equipment, enabling bulldozers and graders to efficiently navigate and manipulate various terrains while maintaining stability and durability.
Concrete Mixers: Concrete mixers are pivotal in the construction of buildings and infrastructure projects. Components such as mixing drums and blades are often fabricated using engineering machinery castings. The abrasion resistance and strength of castings contribute to the longevity of concrete mixers, ensuring they can handle the demanding task of consistently mixing and transporting concrete on construction sites.
b)Mining Industry: Mining Equipment: The mining industry relies on robust and durable equipment for extracting minerals from the earth. Heavy-duty castings are integral to the construction of various mining equipment, including drilling rigs, crushers, and mineral processing machinery. The wear resistance and strength of castings make them well-suited for the challenging conditions of mining operations, where equipment is subjected to extreme loads and abrasive materials.