Fiberboard ?? Styrofoam?? Duct Board ?? Cutting Tools???

[lptools]

Hello, Guys. Jim, your post jogged my tool inventory memory, and I came up with this forgotten tool. I am not really sure what to call this tool, and could not find any info on it. The blocks are marked 1, 2, and 3 , and each holds a blade to cut a different profile . Looks like Chamfer, V-Groove and Straight. Funny, there is a small piece of pink styrofoam stuck in the V-Groove cutter. The blade packs are marked Christy Trademark Patent Pending. There is a brand name product I worked with years ago called Dryvit. It is basically a stucco finish (latex acrylic mixed with different aggregates) that is troweled over a styrofoam/fiberglass mesh base. There were a lot of specialty tools out there for profiling the foam before applying the aggregate., such as long board rasps, hot knives, I liked the Surform line of tools. Possibly used in that application?? Thanks, Lou

[bill300d]

They are used to form ductwork out of aluminum backed fiberglass sheets for hvac systems if memory serves me correctly.

[lptools]

Hello, Bill. Sounds good to me!!! Thanks, Lou

[oldgoaly]

I had a set of duct board tools and got rid of them. 3 in the set.  1 "V" for bends, the other 2 were for lap joints for the seams they were matched. I'm itching just typing about them.
There was a 4th straight thru cutter but a old knife worked better.

 

[Bill Houghton]

I'm itching just typing about them.

When I briefly did sheet metal work, we were wrapping the ducts in 1" fiberglass, laid on in a spiral.  The best technique involved holding the ducts between your legs as you wrapped the glass on, which meant you soon found yourself straddling a fiberglass-covered duct.  The journeyman I was working under recommended taking home a few feet of it and putting it on my side of the bed, to get used to it.  Somehow, I suspect he was joshing.   

[oldgoaly]

I stopped when the sun was shining in the window and I could see how much of the fibers were in the air.

[wvtools]

I am pretty sure it is a fiberboard beveling set.