Industrial mold?

Hello! As I've mentioned in my other threads, we recently purchased an architectural salvage warehouse that was quite run down. We are trying to identify items that befuddle us...this being one of them. It is marked "industrial mold", but we would love additional information. Please and thank you!

 

That would be a pattern for making a mold

 

a cast aluminum plate mold!

 

looks MCM...

 

Any sign of wiring having been on, or anything on the back?

 

One Guess: early circuit board. ..Really I have no idea.

 

Perhaps the hardware at the bottom is earlier? I cannot see it.

 

Thanks, everyone! This item is hanging high on a wall, we haven't examined closely yet. I'll try to grab some additional pictures today or tomorrow and post them.
So far, the responses are like Greek to me, so I'll need to do some research to understand the acronyms

Thank you, thank you, thank you!

 

You have the blue and salmon colored piece

 

My apologies Seventh, MCM = Mid-Century Modern, and as for hardware - I meant the 2 thingys that look like "keys" (?) at the bottom.

It looks like plywood backing to me and I just don't see how wood could be used as the back plate for the casting of a mold.

 

Wood is the most common pattern material.

Sand is packed around the pattern. The pattern is then removed. The sand is the mold.

 

So that would be the top part of the mold in the sand and then removed for the pour? If so that makes sense. Thanks Terry.

 

Watch where he removes the pattern at 1:08


Didn't anyone have shop class?

 

I was required to take a semester of "wood shop" in Jr High - 8th grade - in Ann Arbor, Michigan in 1960. The boys were required to take a semester of "Home Economics" (turn-about being fair play, I guess. )

 

My friends and I in the 70's took a homech class in our High School just to meet girls - does that count?

 

Thanks all! Sorry I was slow in posting additional photos, real life gets in the way of my forum time. My husband said there are two molds, so I've attached the pics he took today. I understand more about what they are thanks to you guys...but how to tell what there were molds...for? How can you tell they are a plate mold? (assuming they belong together)

 

Here is the second mold...

 

No molds! You have patterns.

It looks like they were a square washer for use on I beams.

 

Patterns!! Patterns!! NOT molds! Thank you...I'm learning I'm still trying to wrap my head around these...shop class was not in my past.