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Old 02-18-2018, 02:03 AM
Gail Obendorf Gail Obendorf is offline
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Question DIY Blowing molds

I've been asked to make several identical (or nearly so) blown glass flames. I'd like to help, but I'm stumped.
I don't have access to a woodworker. I do have access to clay & plaster. I am open to any ideas or suggestions of how to make a mold.
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Old 02-18-2018, 10:13 AM
Dan Vanantwerp Dan Vanantwerp is offline
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Both Glass Notes and Ed Schmidt's books have DIY sections on this.

There was also a huge list of retired Fenton molds that became available and were posted some time ago. May have been a flame in there, but besides the recent posting in the classified section I don't know what is still available, if anything. They were pricey but did get positive reviews from those who picked up a few.
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Old 02-18-2018, 11:32 PM
Gail Obendorf Gail Obendorf is offline
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Thanks Dan, I will look into it
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Old 02-19-2018, 02:02 AM
Mike McCain
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Carve graphite blocks with Dremel tools and core drill bits. Buy hinges. Wear protection.
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Old 02-23-2018, 09:57 PM
Gail Obendorf Gail Obendorf is offline
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Thanks Mike Not sure where to find graphite blocks, but I'm hoping that Google will be able to help me out
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Old 02-24-2018, 07:42 AM
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Pete VanderLaan Pete VanderLaan is offline
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I used HGL Carbon in the past. High quality stuff.
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Old 02-24-2018, 09:24 AM
Scott Mitchell Scott Mitchell is offline
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Is there a school nearby that does metal casting (Technical, Engineering, or Art school)? Perhaps you could get a mold into it when they do an aluminum pour.
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Old 02-24-2018, 12:25 PM
Eben Horton Eben Horton is online now
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I had a commission once to reproduce some chandelier flame globes. I made a rubber mold of a flame, and then another rubber of that mold to give a rubber positive. Then I placed that inside a plastic painters pail and filled that with wax on its side. I then removed that wax and carefully made another wax up to the line I had made of the first wax. I then carved some fred flintstone looking hinges in it that accepted a 1/4 rod and sent them to a foundery. A lot of work but I was compensated nicely.

Ransom and randolf sells a good rubber
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Old 02-26-2018, 07:59 AM
Art Freas Art Freas is online now
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how do you put hinges on the graphite? Just screws?
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Old 02-26-2018, 05:12 PM
Jordan Kube Jordan Kube is online now
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Art, you typically want to use something with a coarse thread and treat it nice.
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Old 02-26-2018, 06:31 PM
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Quote:
Originally Posted by Jordan Kube View Post
Art, you typically want to use something with a coarse thread and treat it nice.
And use a tap and die.
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Old 02-27-2018, 11:54 AM
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Pete VanderLaan Pete VanderLaan is offline
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Quote:
Originally Posted by Jordan Kube View Post
Art, you typically want to use something with a coarse thread and treat it nice.
****
I have a carbon cone attached to my airline gun for puffing out a piece. It's tapped and you do have to treat it nice.
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Old 02-27-2018, 12:13 PM
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Franklin Sankar Franklin Sankar is offline
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Eben so you made a wax negative. Why did you not use the rubber positive.
What did the foundry do with the wax mold you sent them?
Franklin
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Old 02-27-2018, 12:21 PM
Eben Horton Eben Horton is online now
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Quote:
Originally Posted by Franklin Sankar View Post
Eben so you made a wax negative. Why did you not use the rubber positive.
What did the foundry do with the wax mold you sent them?
Franklin
The wax gets invested in a ceramic shell mold and then they burn out the wax.


You make a rubber and then a wax because you can make more waxes down the road if you have to, plus its easier to make a rubber mold of a wax than it is to make a rubber of a rubber.
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Old 02-27-2018, 12:30 PM
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Franklin Sankar Franklin Sankar is offline
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Ok so you made a ceramic object not a mold to cast glass.
I thought you were making a mold.
Thanks
Franklin
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