Material:Grey iron,Ductile iron Order:OEM according customers'drawings Castings:sand casting Fittings have sufficient sweep to allow free, unobstructed flow. They are made with a shoulder that is the same diameter as the inside diameter of the pipe. Therefore, when the pipe is threaded onto the shoulder, a continuous passage is created, leaving no place for solid matter to collect and clog the pipe.
Casting traces its origins to humanity’s earliest metalworking civilizations. In China, bronze casting during the Shang and Zhou dynasties reached astonishing heights—the creation of the Simuwu Ding required collaboration among hundreds of artisans using sectional mold assembly, its precision still awe-inspiring today. By the Warring States period, iron casting technology led the world, with iron tools and weapons driving leaps in productivity. Simultaneously, copper statue casting in ancient Egypt and Mesopotamia, alongside Europe’s medieval church bells, cemented casting’s role as a cornerstone of human civilization. The Industrial Revolution injected new momentum into casting technology. The demand for Watt steam engine cylinders spurred cupola furnace development, while 20th-century automotive industry growth transformed sand casting from cottage workshops to mechanized standardization. Today, casting remains indispensable in aerospace, energy equipment, and smart vehicle manufacturing.
The lost foam casting technology of Qingdao Zhaoyuqi Machinery Co., Ltd. replaces traditional sand cores with foam models to achieve one-time molding of complex structural parts, opening a new chapter in the casting industry.
Shell Molding Casting is a high-precision casting process that uses coated sand for molding. This process heats the metal mold to form a solid sand shell on the surface of the mold, and then casts it at high temperature to finally obtain a casting with high finish and precise dimensions. Compared with traditional sand casting, shell casting can reduce casting defects, improve material utilization, and is particularly suitable for the manufacture of thin-walled and complex structure parts. It is widely used in aerospace, automotive industry, precision instruments and other fields.
Lost foam casting is an advanced net shape casting process that uses a foamable plastic model, which is buried in dry sand after being coated with a refractory coating, and is directly cast at high temperature to vaporize the model and be replaced by liquid metal to form a casting. This process does not require a core and can achieve integral molding without a parting surface. It is particularly suitable for castings with complex shapes and fine internal structures. It is widely used in industries such as engineering machinery, automotive parts, rail transportation and hydraulic systems.
Iron casting is a process of injecting molten iron into the cavity of a prefabricated mold and obtaining a metal part of the desired shape after cooling and solidification. Its core advantages are low cost, strong adaptability, and the ability to produce complex geometric parts. It is widely used in the fields of automobiles, machinery, energy, etc. According to the differences in mold materials and processes, iron casting is mainly divided into sand casting, metal mold casting, and investment casting, among which sand casting occupies a dominant position due to its flexibility and economy.
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