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The wood pattern to mold a very special set of bronze rings #1: The rings were made to lift an Ark

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Blog entry by Patternguy posted 03-26-2017 09:29 PM 1673 reads 0 times favorited 2 comments Add to Favorites Watch
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My garage is yielding all kinds of forgotten projects and reminders of the stuff I’ve made. The following images show the pattern I made and mounted on a squeeze board in order to cast a special set of bronze rings.

The fact is, this a really small story…but, it is part of another story, which is part of a bigger story, which is part of an even bigger story, and so on…until we get to a REALLY BIG story, one held as truth by a particular religious faith.

All I can say is, it’s an important part of the coolest thing I’ve ever made.

This the finished casting and where it went.

Which you can see, is part of this.

Here is another view, notice how the bronze rings don’t match the gold.
I never got an answer why the guilder couldn’t get the finish right.

Here you can see one half of the pattern. The fancy title would be “full, split-parted pattern. The pattern is split in the middle with one half on each side.

It’s made of mahogany and birch dowels. Each half of the ring shape made of 2 courses of segments. The halves were pinned together before sanding the rings to shape. The pattern was mounted with the same pin holes to match the two halves on the board. It was painted gray for molding purposes.

The clear coated wood pieces are collectively called the “gating system”. The gating system forms a hollow channel through the sand mold, allowing molten metal to enter the mold cavity made by the pattern.

The notch in the gating is called a “choke”. It’s purpose is to slow the metal down as it fills the mold.

It’s a simple part, but it was hard to cast. I believe it took 4 tries to get one good one. I needed four good ones.



2 comments so far

View magaoitin's profile

magaoitin

246 posts in 820 days


#1 posted 03-27-2017 11:12 PM

Why do I get the feeling that this is a photo of the interior of your “garage”?

Its either that, or you have been collecting stuff in your garage for over 4,000 years.

Very impressive!

-- Jeff ~ Tacoma Wa.

View Patternguy's profile

Patternguy

53 posts in 562 days


#2 posted 03-28-2017 01:13 AM

Jeff,
That is one, very creative…excellent, post!

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