Wood pattern for casting iron flowers

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Blog series by Patternguy updated 03-26-2017 06:52 PM 4 parts 5769 reads 3 comments total

Part 1: There is an inside, and an outside, to everything.

03-19-2017 03:23 AM by Patternguy | 0 comments »

Master patterns and production tooling belonged to whoever paid the invoice. On the other hand, whatever was used to build the pattern, things like jigs, fixtures, molds, negatives, or plugs, was recycled in the shop, or was dis-guarded. Stuff like that usually got thrown into the scrap barrel. The objects that are the focus of this story escaped that fate and ended up on a shelf in my garage. I think they have a story worth telling. Patterns often required unique shapes that had to be...

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Part 2: The flower is defined by its wire frame

03-19-2017 04:26 PM by Patternguy | 1 comment »

First I’ll clarify what this pattern will actually make… The casting is a “Cooperstown Flower”. It’s a piece of architectural iron that got its name from a restoration project done in 1985 in Cooperstown NY. Unfortunately, I don’t have any pictures of the casting and will have to rely on a model I put together for illustration. I have a video too, but I have to figure out how to post it. Now that we know what we are making, hopefully, the next ...

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Part 3: Subtracting the inside from the outside yields a flower with just the right wall thickness

03-24-2017 01:29 AM by Patternguy | 2 comments »

That is of course, if your wire-frames layouts are accurate. Here are some closer looks at the plugs. Notice the direction of the grain on the two pieces???I could not decide which direction would be the easiest to work, so I tried both ways.(It’s been so long that I can’t remember which one was the better choice) Anyway,The individual “petals” were roughed to shape on the disc sander. They were finished with a spoke sheave and t...

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Part 4: What remains, is what you want.

03-26-2017 06:52 PM by Patternguy | 0 comments »

Corny title…but it pretty much sums it up. The wood pieces in the previous posts are what’s known as “plugs”. The red plug represents what the inside of the flower casting will look like. The mahogany plug represents the outside of the flower. 1. Two pieces of plywood are drilled and pinned together. Center-lines are transferred from one to the other. 2. The mahogany plug is mounted on one piece of plywood using the center-lines to locate it. 3. A wood fram...

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