Generally stem diameter size equal to or less than Bronze Jianji thickness of the bronze sword, and the apparent bronze sword buried with the casting of more than a one-time the entire cast, the rest of practical bronze sword first cast bronze blade and cast seven grinding, recast the access grid, stems, and the first, this process should be more general process of the Eastern Zhou Dynasty bronze sword casting technology. Section V compound bronze sword above the new understanding of the process of casting bronze swords, bronze sword for general utility bronze sword, with a special process, the casting process is more complex. Figure 15 is a common compound bronze sword Figure, the borders of the bases of the composite bronze sword is copper, the casting ahead and clip molded in two bronze sword Fan. Even it could, those magistrates, whether Zhang, Lee or Liu magistrate would take the bronze away.
From the geometry of the bronze sword, the borders of the bases of the composite bronze sword rely on the grid of a wide and thick, rely on the front of a narrow and thin. This geometry, regardless of their copper borders of the bases is to cast blank or cast after processing, can be done with two bronze sword Fan closely with the cavity space together. Fan cavity can not be tightly sandwiched copper heart, cast copper heart will shift, if the thickness of copper heart is slightly larger, have greater strength due to Tao Fan, two bronze swords Fan involution there will be a gap, the casting when the copper fluid leakage (or running fire). With the power and influence, Song immediately found out the antique dealer and cost 150 kilograms silver to buy the bronze back and deeply hidden inside his house. Currently see composite bronze sword, its copper heart is more obvious after the cast after processing, and is a bronze sword with both sides of the processing from the same time.
Therefore, only copper heart before casting is rough. One can imagine that the casting process of the composite bronze sword, nor two bronze sword Fan clip of a copper heart so simple. How the real process? Needs further research, do not know its real casting of technology. From the surface geometry conditions only speculate Fan casting process is unreliable. Section VI, other processes described above in the bronze sword of sword of bronze, and more common bronze sword in the shape. Figure 16 is also the structure of an ordinary bronze sword inferred map, the structure of its stem and Figure 3 bronze sword. Looking at the regained bronze, Song was extremely proud of his success and perfectly satisfied. From outward appearances, this bronze sword stems penetrate a copper plate, has been wearing it to the grid, how to wear into the unknown. The human eye can only see the surface, internal structure, but can not see.
In fact, the structure of this bronze sword with general bronze sword casting process is the same, just within the stem size width within the stems of bronze swords in general, outside of the stem can not contain exposed to the outer stem. The whole lifetime of Song, ups and downs, was closely intertwined with the Da Yu Ding, a valuable bronze.Therefore, when the bronze sword to see this structure do not understand the process of casting bronze swords, structure puzzled, always thought that a copper plate is inserted in the stem. The bronze sword was quite small, but there are a certain number. Fan casting process to understand clearly in order to understand this seemingly can not understand how the structure is formed. Parting molding process, this is the chinese bronze casting process, molding process, the late Xia culture in the skilled application.
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