Re: H block

Posted by JayWalt on December 27, 2006 at 18:55:54 from (24.223.138.48):

In Reply to: Re: H block posted by Janicholson on December 27, 2006 at 17:53:21:

I often was irritatewd by the fact that people call them freezeplugs as well. All of the frozen blocks that the plug has popped off has also been cracked. The notation that these "freeze" plugs would save a block from being cracked when the antifreeze (or more then likely straight water as people dont know what antifreeze is I guess) froze is ludicrous. When water freezes it expands as it crystalizes. This expansion is generally in all directions and takes up 4% more space. Maybe if you had one side of the block a big plate that would pop off, it might help. The water traveling through the passages to the freeze plug to pop it off is probably not going to happen especially if the water freezes starting around the plug and back through the system.
These holes are to empty the sand out after casting, are they not?

Replies:

• Re: H block Easy1 20:20:03 12/27/06 (0)

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