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3 examples of wood foundry patterns #1: Can you tell what the white pattern is?

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Blog entry by Patternguy posted 02-24-2017 03:01 AM 2922 reads 0 times favorited 4 comments Add to Favorites Watch
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Three different patterns.

This pattern makes 2 iron fittings for every core put in the mold.

Need to hold up a handrail?

This is a great example of well-planned, smooth parting lines perfectly splitting a pattern in two!

Look at this one closely and try thinking of where you’ve seen this shape before.

Clue?...wet hands and no paper towels:)

This pattern was made about 28 years ago, and is made of mahogany. The walls are a uniform .200 +/- .015 thick. The customer was afraid the wood grain would show up on the casting and asked us to seal it with automotive paint before the production tooling was made.

This one was a real challenge to stay within tolerance, the drawing was a bunch of section views.
I think I might have spent as much time on the follow block as on the pattern.



4 comments so far

View Kelster58's profile

Kelster58

300 posts in 409 days


#1 posted 02-24-2017 10:16 AM

A pattern for a thin wall casting made from wood. That takes real craftsmanship. Looks like a part for a farm tractor.

-- K. Stone “Tell me and I forget, teach me and I may remember, involve me and I learn.” ― Benjamin Franklin

View Kaleb the Swede's profile

Kaleb the Swede

1799 posts in 1838 days


#2 posted 02-24-2017 03:52 PM

Very neat. I never thought these things were cast this way. Guess I should have known. Thanks again

-- Just trying to build something beautiful

View Don Broussard's profile

Don Broussard

3415 posts in 2120 days


#3 posted 02-24-2017 08:04 PM

Hand dryer mold. Very tight work too.

-- People say I hammer like lightning. It's not that I'm fast -- it's that I never hit the same place twice!

View Patternguy's profile

Patternguy

53 posts in 560 days


#4 posted 02-24-2017 11:09 PM

Yep…sold by World Dryer inc.and found in restrooms everywhere.
I enjoyed every minute of building this one. At that time, you needed a master pattern in order to build production tooling. Wood was still king, as well as the pattern makers hands to work it.

This pattern was used to make a set of urethane, vertically-parted, production tools. In this case, one 1.25” iron plate with the outside shape molded on top of it. And a 2nd plate (actually it was an 8” thick block) with a pocket in the shape of the inside of the pattern, cast into the block.

Patterns always went back to the customer. I don’t recall why, but the tooling was delivered and the pattern sat on the corner of my layout table for weeks. One day I threw it under my work bench where it sat for years.

I brought it home one day for show and tell because I thought it is so recognizable.

I still think of it every time I hit the button somewhere to dry my hands.

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