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

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    • know what causes them .how do I cut down on them ?longer runs dryer greensand?
     
  4. Aug 28, 2019 #4

    sawyer massey

    sawyer massey

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  5. Aug 28, 2019 #5

    sawyer massey

    sawyer massey

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    Getting better flywheel is 12 "x3 crank disk is 7.25
     
  6. Aug 29, 2019 #6

    ddmckee54

    ddmckee54

    ddmckee54

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    Have you tried additional vents? Or maybe not ramming the sand quite so hard so that the gasses can vent through the sand easier?

    Also have you checked in with the guys over on AlloyAvenue http://www.alloyavenue.com/, or The Home Foundry http://forums.thehomefoundry.org/? They love to hear from anybody who's pouring iron.

    Don
     

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