Squeeze sand mold *Annoying short format with annoying music https://youtube.com/shorts/xQuvY_cFP2c?feature=share
It was interesting to see when the person in the righthand side of the video pours the molten aluminium and it swirls around the sides of the spue sucking in air. A straight sided large sprue is also used which is supposed to be not used as it will suck in air yet they get good castings.
My eyes continued to widen as he progressed up the mold and I quietly cheered him as he took it apart and reassembled. Very impressive indeed. I thought for just a second that maybe all these guys in Pakistani work books might be on to something with the squatting posture. Then I looked at my gut.... I'll keep the molding table.