Posted: May 22nd, 2023
A void is simply an enclosed air within an area of a mold. There are several reasons â€œthat might contribute to this including limited holding pressure, too fast a filling process, and it happens at thicker areas especially at the bosses and the ribs (Malloy 25)â€. Moreover, they do also happen where there is un-melt embedded within a melt pool.
Finally, the blister is an imperfection defined by a raised part of a layered part on the surface of the mold (Fig. 4). This is caused by a process that the material is either too hot or there is a lack of a cooling unit.
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