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Tips, Techniques, and Questions -- Technical questions or tips

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  #1  
Old 2015-01-31, 1:19pm
PyroJoe PyroJoe is offline
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Default Have questions reguarding crucibles

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Hello everybody, I have recently been intrigued by glass castings and would like to start moving in the direction of crucible pours over sand casts. I don't want to spend $1000+ on a new kiln so I am wondering if my little Paragon lampworking kiln (11"deep 7'X7") would be powerful enough to melt a crucible full of soft glass for crucible pours? Any help or advice would be greatly appreciated.
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  #2  
Old 2015-01-31, 1:59pm
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istandalone24/7 istandalone24/7 is offline
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vitrigraph kiln?

https://www.youtube.com/watch?v=LnBu-NUb1rk
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  #3  
Old 2015-01-31, 4:48pm
losthelm losthelm is offline
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What type of glass?
what's the top temp on your kiln?
What is the size of your flask or does the cast piece get batch annealed later?

There are a number of small Kilns with higher firing temps.

You may just need to reprogram the firing schedule or manually adjust temp as it melts.
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  #4  
Old 2015-02-01, 10:21am
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you will need to get to 2150-2200 to pour soft glass out of a crucible, check the rating on your kiln.
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  #5  
Old 2015-02-01, 6:59pm
flowman flowman is offline
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I have an ancient 11" Paragon hex that I use for fusing, and when I was having some trouble with my DIY controller I ran it plugged directly into the line power (not the controller), to try to isolate the trouble. I forgot and left it on for a week (I know, I'm cringing thinking about it! I walked into the shop and thought "why is the peephole glowing?") and it was at something like 2000. My point is, it handled that fine for a week. I imagine it depends on the element rating, so you might want to do a similar test and see if yours can hit that temp.
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Old 2015-02-01, 8:58pm
snoopdog6502 snoopdog6502 is offline
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Let us know how it turns out.

My kiln will do it but its not even a month old so I dont want to run it full blast.
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  #7  
Old 2015-02-04, 12:09pm
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I think it is going to depend on how much time you have to wait between melts.


Amps times voltage equals watts and how many watts you need depends on the volume of the glass you are trying to melt and the temperature that it gets liquid enough to "poor".

At 120 volts you are going to be limited to 15, maybe 20 amps at best and although theory says it is doable how long it will take and how large a volume you will get is going to be limited.

What is it that you want to do with the "poor"?
Perhaps you would be better served melting cullet while it is in a mold instead of trying to go for a "poor".
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