According to the degree of deviation, only less than fifteen could be considered regular, the rest were either skewed or uneven in thickness, somewhat bizarre in shape.
Logically speaking, since these are cast using iron molds, how could there be such a large deviation?
With questions in mind, he traced back to the source. Although he had only inherited some mechanical knowledge from Master Sang, which didn't involve specific production processes, his trained eye quickly identified the problem with the production line.
The mold cavity's inner wall was coated with a noticeable layer of scale, formed by iron filings that sintered at high temperatures due to long-term negligence, directly resulting in uneven casting surfaces.
The flow channel of the casting mouth was deformed, causing uneven flow rates when iron was poured, creating local vortices and resulting in unbalanced internal stress.
