Teach me please

[JustinR]

I know what gate marked pieces look like, but what is the history to them?

---------- Post added at 12:33 PM ---------- Previous post was at 12:31 PM ----------

And I put this in the wrong place and have no idea how to delete it.....

 

[Doug D.]

It's just a simpler, earlier casting technology, pre-dating side-gating, and which relies on gravity to fill the mold cavity from the top down, through a slit. It's fine if you don't want or need the piece to have a flat smooth bottom or do want nice markings preserved.

 

[DSBradley]

To make a long story short, it's all in the way the piece was poured. In the 1800s they made a mold that they poured the molten iron in from the bottom which left a scar that you see on the bottom of the pan. Think of a model car that you built, you have all the pieces on a "tree" or "sprue" (sp?). You cut off the piece you need and you have a scar where it was attached. In the early 1900s, they started to make pattern molds with a side gate, where the iron that fills the void in the mold comes in from the side. This made it possible for a pan with a smooth bottom and the gate on the side to be easily ground. Hope this helps.

 

[JustinR]

Seems like common sense now that its told to me. Thank you both for the knowledge