Jack Hern and I have decided to partner in the making of a Hern Verbruggen barrel.
My part is to attempt to make the wooden model in two equal halves to use as a positive in Jack's molding process.
There are a lot of pictures to share.
Here are some of the processes Jack uses in his foundry. They are of several different barrel types but you will get an idea of how it works.
These show different wooden forms, how they are set, how the liner is placed, and some finished models.
Thanks for sharing this Micheal. I really had no idea how they did this casting of barrels. Interesting for sure.
Is that some sort of sand they cast in?
Nice Lathe work also.
Yes, that is casting sand.
At this point the barrel is just roughed out.
The next set of pictures will show it being fine tuned.
Almost everything still needs to be taken down about 1/8" or so before final sanding.
Before fine tuning, I noticed that the seam was opening a little. Hose clamps solved the issue nicely. I just moved them whenever I had to.
They also allowed me to pull the 3" deck screws and fill the 3/8" holes with a short dowel.
I got stage one finished. I'm happy.
It worked out and both halves are flat.
Now I have to figure out the trunnion issue. They will be 2 1/4" diameter, but they will be mounted below center line as opposed to centered in the barrel. I have to work that out.
They will be poured in the vertical position so they each have to have a 1 degree taper to allow the casting sand to release them without collapsing the sand.
That part is easy. The below center line boring of a 2 1/4" hole is harder.
I'm thinking on it.
Enjoy the pics.
I see now. I was going to ask a dumb question how you split the barrel in half and it was still full dimensions. I must have missed it is made in two separate pieces originally. That makes sense now. My feeble mind was thinking you cut it down the middle after the lathe work, sorry kinda slow to catch on today,LOL