People who use aluminum castings should know that there are many defects in their usage, including the formation of stomatal bubbles. According to our Hangzhou aluminum casting manufacturer experience, when aluminum castings produce blowhole bubbles, there are the following characteristics:

 

Three the holes in the casting wall are generally round or oval, with smooth surfaces, usually shiny oxide scales and sometimes oil yellow. The surface pores and bubbles can be found through sandblasting. The internal pores and bubbles can be found through X or mechanical processing. The pores and bubbles are black on the X light negative.

 

Why do we generate stomatal bubbles? We think it is mainly due to the following reasons: