Spun Cone Supplier Question

What is the intended purpose? What kind of tollerances need to be met?

Many decent sized sheet metal fabricators use conical sheet metal rollers to roll conical shapes. The seam is welded (often tig).

These are commonly used in ventilation ducting as reducers and also for forming conical bottom tanks, funnels and hoppers.

If a welded piece could work, a capable sheet metal shop would be a good place to look.

Also, you might find a piece looking for hoppers or funnels somewhere like ebay.

I think the reason why I'm having trouble is because the economy is picking up..

Yes, I did send out a RFQ's to the larger sized sheet metal fabricators, problem is the 10 ga material,... where duct work is 18-26 ga. for ventilation.

The problem with this is the 1" on the minor Dia. (and the thickness) where the cone would have to be 'worked' (i.e. finished off and pounded by hand).

I was surprised that metal spinners where able to spin this thickness. but the price t pay for the jigs, its not feasible.

Anyways, I just received a reasonable quote (had to cash in one of my favors) from a fabricator which they believe they can bumped it on a brake. They still have to finish hand working it, but that's is normal, but the quote is more in line what I expected.

https://www.wenzelmetalspinning.com/bulk-solid-handling.html

https://www.alibaba.com/product-detail/Stainless-steel-hopper-Filling-Machine-Hopper_502081580.html

https://www.diytrade.com/china/pd/8160472/Stainless_steel_hopper_funnel.html

http://www.cmspinning.com/metal-cone-spinning.html

S.E.

I was sending out a number of RFQ yesterday,... I even had this one open on my browser,... but a ball of string or something must of rolled through the office, and I dropped what I was doing and chased after the ball of string instead.

Unfortunately, they got back to me very promptly to let me know its beyond their capabilities,... but gave me a reference to try.

Thanks,

Yes a ball of string can be quite distracting....

I'm now looking over my shoulder to find where that camera is....

Have you tried Toledo Metal Spinners?

The 10 Ga might be the kicker. Dunno.

Thanks doorman,

when Wensel turned it down, they suggested to try them... They're working on a quote now.

10 ga is a kicker, I got (2) fabricators that will try it and bump it in (3) pieces, I already got a quote back from one of them, and I'm waiting on the other.

Why can't this just be cut and welded from a sheet...?

That’s aphis they fabricate... and if it large enough it can be rolled... will have hauling on the stainless.

but because of the thickness and the small 1” their it’ll be bumped with a brake press, in (3) pieces and with so much geometry it’ll be tacked and pounded for fit. And then final weld.

I keep seeing the 1" hole as making a roll or other operations difficult.

What is the size hole that makes things easier? Can a shorter cone be fabricated and have a ~4" hole(for example)? Then a tiny, but easier to make cone of 4" to 1" made to finish it off? Both pieces would stack and add up to 20" height.

Yep, the 1” hole and the material thickness, no, as odd as it sounds, it’s for a preparatory process. I brought that up the (2) cone area over a month ago and the powers that be shot it down.

You may want to try a sanitary tank fabrication company as they should have capabilities to both roll metal that thick and provide smooth seams. Watson Metal Masters (417-725-5484) and Stainless Fabrication Inc. (800-397-8265) are two that immediately come to mind. They are in the Springfield, MO area. Sprinkman is a third that I have used in the past (800-816-1610). Regards.