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The power of drawing lessons from history
Release time:
2023-07-25
In its long history, human beings have known nature, transformed nature, and invented many technologies. And some technologies, with their rich scientific nature, engineering rationality, and extensive scope of application, have been circulating since their birth thousands of years ago, and they are still radiating new vitality. Casting technology is such a technology.
China's 5,000-year history of civilization has been accompanied by casting, which has played a unique role in promoting social progress and enhancing social productivity. Casting is an important pillar in the five thousand years of civilization of the Chinese nation.
In its long history, human beings have known nature, transformed nature, and invented many technologies. And some technologies, with their rich scientific nature, engineering rationality, and extensive scope of application, have been circulating since their birth thousands of years ago, and they are still radiating new vitality. Casting technology is such a technology.
Casting is a metal hot working process that humans have mastered relatively early, and it has a history of about 6000 years. China has entered the heyday of bronze castings between 1700 and 1000 BC, and the technology has reached a very high level. Casting refers to the process of melting solid metal into liquid and pouring it into a specific shape of the mold to be solidified and formed. Cast metals are: copper, iron, aluminum, tin, lead, etc., ordinary casting materials are raw sand, clay, water glass, resin and other auxiliary materials. Special casting molds include: investment casting, lost foam casting, metal mold casting, ceramic mold casting, etc. (Raw sand includes: quartz sand, magnesia sand, zirconium sand, chromite sand, magnesium olivine sand, orchid spar sand, graphite sand, iron sand, etc.)
The 875kg Simu Wu Fang Ding of the Shang Dynasty in China, the Zeng Hou Yi Zun Pan of the Warring States Period and the transparent mirror of the Western Han Dynasty are all representative products of ancient casting. Early castings are mostly agricultural production, religion, life and other aspects of the tools or appliances, artistic color. At that time, the casting process was developed in parallel with the pottery making process and was greatly influenced by pottery.
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