Casting Glass

[CrudeOil]

Hello everyone

Didn't know where to put this, so here it is in the shop. Has anyone ever done any glass casting or know of a place where a guy could get some done. This all comes about because of UPS breaking a cover for an old electric meter. That's another story


Thanks Harry

[John Newman, Jr.]

If you get any good leads, please share them! I would love to be able to make or acquire repro glass sediment bowls for the Pincor small engine carbs. The one on the left is the type I am talking about. The one on the right is their older style and has a screw-on metal bowl.

[PTSideshow]

It would be cost prohibitive to have a mould made, for one or two items. As in general it isn't cast glass, but blow moulded glass glob against a metal shaped mould to get the shape. The parting line that you see is the two or three piece mould opening lines.
They also use a wooden former or mould, So any good glass artist that does bowls or vessels should be able to do it. you may be able to make the former for them to use.
And yes you can do it at home, but you will need a glass melting furnace, or glory hole to contain the molten glass, and an annealing oven to slowly cool the glass, to relive the stress in it. along with a host of tools and bits and pieces. That will prove costly for a one here and there use. The melting of glass isn't as closely related to metal as most think. It is more of a slow thick syrup.

As to The C.O.E.(coefficient of expansion) of the type of glass and the materials that make up the formula for the glass. If you have the knowledge it is easy to pick an assortment of glass bottles etc to get something that will not self destruct when taken out of the oven.

As to the wood mold or former it is usually charred and carbonized it is also worked wet, it it used to hand shape.
Graphite and carbon blocks are also used in the shaping of molten glass.

As in the old days most everything with a vessel shape or bottle was hand blown till the advent of automated machinery.

Blown glass is a misnomer for the processes of hot working of the glass.

You should be able to find a glass working hot artist near to you. Or maybe in the art department of a higher education venue near you.

[K D Redd]

John,

Will the small glass bowl that B&S uses fit the picture carb? If so, the Briggs P/N is 298683.

Kent

Originally Posted by John Newman, Jr.

If you get any good leads, please share them! I would love to be able to make or acquire repro glass sediment bowls for the Pincor small engine carbs. The one on the left is the type I am talking about. The one on the right is their older style and has a screw-on metal bowl.

[Joe Brincat]

John N. , what size are the Pincor fuel bowles? There are several older outboard motor fuel filter bowles that look similiar. I one from an Evinrude here that measures 1 3/8 dia X 1 1/8 long... is this close?
Joe B

[Harry]

Check in on Bottle Mysteries and look at the links page. There's world of information out there!

http://www.bottlemysteries.com/

[John Newman, Jr.]

The Pincor glass carb sediment bowl (shown below) is:
1.060" tall overall
1.040" outside diameter
.734" inside diameter
neck is .918" outside diameter X .150" high
bottom is .210" thick and has an .060" lip

I have considered using the small (lower) glass sleeve used on drip oilers by adding a metal 'cap' & gasket on the bottom.

[Elden DuRand]

John:

This is just a wild idea but I will throw it out here.

Why not get some clear epoxy, the stuff they pot auto electronics in and make your own casting.

You'd have to make a set of patterns but the part looks very easy to do.

I got a can of some kind of potting epoxy at a flea market a few years ago and have made a few simple things from it. Never checked it for gasoline and alcohol resistance, though.

Outfits like Devcon and Belzona make lots of different kinds of materials that possibly could be used.

I did a quick looksee and found:

http://www.tapplastics.com/shop/product.php?pid=386&

They sell what's called "casting epoxy". The stuff is used to make things like paperweights with items encapsulated in the resin. I have no idea if it will be safe to use with fuels but you can probably call the outfit and see.

Let us know what you find out.

Take care - Elden

[CrudeOil]

Thanks everyone for the ideas. I was thinking of contacting a glass blower. There is one not to far away. What helps is I have a spare to make a copy from.

[KidDynamo]

Originally Posted by John Newman, Jr.

The Pincor glass carb sediment bowl (shown below) is:
1.060" tall overall
1.040" outside diameter
.734" inside diameter
neck is .918" outside diameter X .150" high
bottom is .210" thick and has an .060" lip

Mr. Newman:

Did you ever find your glass sediment bowl? Is it Pincor Part # 60-430 when found NOS in the box?

[jht1057]

CrudeOil,

If you have or any one has glass items they need cast, please feel free to contact me. I have the kilns and materials to cast glass, as long as there is a pattern to work from. Even if the original is broken, as long as all the pieces are present, I can use them to make the moulds.

Jim