blow holes

Discussion in 'Home Foundry & Casting Projects' started by sawyer massey, Jul 22, 2019.

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  1. Jul 22, 2019 #1

    sawyer massey

    sawyer massey

    sawyer massey

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    I just started casting cast irion and all my poor's so far have had blow holes at the pooring hole
    What am I doing wrong?
     
  2. Jul 23, 2019 #2

    Brian Rupnow

    Brian Rupnow

    Brian Rupnow

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    Try googling "blowholes in iron castings.
    "Such defects can be caused by air entrained in the melt, steam or smoke from thecasting sand, or other gasses from the melt or mold. (Vacuum holes caused by metal shrinkage (see above) may also be loosely referred to as 'blowholes')."
     
  3. Jul 24, 2019 #3

    sawyer massey

    sawyer massey

    sawyer massey

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    • know what causes them .how do I cut down on them ?longer runs dryer greensand?
     

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