Lead Mold

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I made this 4-core lead mold on the lathe by boring 4 tapered holes in the piece of 150 yr old cedar. It was laying on the floor of the wood room and often got wet. When I went looking for the wood for this mold it said "pick me, pick me !!".
I wanted to turn a lot of old lead pieces into 2# ingots to be used on my old Howe beam balance scale. I mounted the block on my faceplace by using the 1/8" pin to pick up the center of the bores and then 3 or 4 screws to hold the block in place for boring. I bored it from 1 1/2" to 1 3/8" at the bottom which proved to be too little of a draft angle for these to release quickly. I made 2 shots and then split the block to pieces after the second round.  In the future I'll use steel or aluminum for molds . It gives a much better finish on the ingots as seen  with the 1# ones I poured using the split steel mold.
This was quick to make and I did reshape all the scrap lead pieces including a cup full off 22 bullets I pulled out of my backstop. Next is to weigh them to see how close they are to 2#.
cheers, Jim

Cheers, Jim ........................ Variety is the spice of life...............Learn something new every day

15 Comments

A foundry man, cool Jim.

Main Street to the Mountains

That seemed to work well Jim.

I did a similar lead pouring project making 10# downrigger weights for fishing deep. I used either Maple or Hickory (can't recall) and turned on the lathe two small shallow bowl shaped recesses in 2+" thick wood that matched and could be clamped together so they formed a disc shape. I had two register pins in the wood to keep them aligned.  I added a pour hole in the top side and a recess so I could insert an aluminum fin sticking out the back before the pour. The wood was soaked in water for a couple of days before pouring so I had to be careful of "steam" on the first pour. I made several weights before the wood was too charred to continue. The weights worked much better than the usual round balls many people use.....less drag in the water.
Jim, pretty cool. looks like the experience of a toolmaker.
Nice quick molds, good thinking.
OMG Jim, ...what caliber is that, its obviously not  .22, ... and I bet it kicks like a mule when you fire it!

Regards Rob

Love the lead work Jim!

I have probably several tons of various lead alloys for bullet casting. A buddy made a wood mould for saboted rounds for his replica war cannon he made from a decommissioned 70 mm artillery barrel. He made a cutter from an old mill bit  to make replacements as the wood doesn't last very long.
Thank you all for the nice comments!!

Hi Rob, they would come to about a 38mm rounds!!

Hi Bruce. In the future I'll be making aluminum molds. These came out between 29 ounces and 33 ounces. I need them to be all oversize so I can turn them to exactly 32 ounces.

Cheers, Jim

Cheers, Jim ........................ Variety is the spice of life...............Learn something new every day

I always see those "old timey" weights with the bottoms drilled. Weight tuning I suppose?
38 ? wow that's Dirty Harry Stuff is it not?

Regards Rob

Hi Bruce, that is how I do it with the digital scale right next to the drill press.

Hi Rob,Dirty Harry could not carry a 38 mm...it would be like  380 caliber!! The cannon on a Warthog is only 30mm

Cheers, Jim

Cheers, Jim ........................ Variety is the spice of life...............Learn something new every day

Good Project Jim,
Regards......Cliff.
A Warthog ! now there is an aircraft if you had the luxury of hearing coming you would know what steps to take to get out of the way!

Regards Rob

Thanks, Cliff
Hi Rob, that A10 Warthog is my favorite airplane!! I like the P 51 too. When I was at Oshkosh a few years ago, I got a ride on an old Ford Tri Motor. They had a P51 that you could also buy a ride on but it was  $1500

Cheers, Jim

Cheers, Jim ........................ Variety is the spice of life...............Learn something new every day