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Thread: My First Molds
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12th February 2013, 10:31 PM #1
My First Molds
Hey All
Well I have had ago at making some of my own molds Sierra mold to cast 12 and a single Executive Clicker mold they have 10mm walls all the way round and 10mm or so thick on the bottom pretty chuffed with myself on this one had some help along the way from Undies via Facebook thanks mate for that other then that I had picked the girls brains at the resin shop on how to achieve this and well it worked D. I have a question some of the nipples have voids from air bubbles I need to fill these some how as they will being used in my pressure pot any suggestions? ?? Thanks in advance
Thanks
Ian
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12th February 2013, 11:02 PM #2
Don't worry about the air holes, but be warned, do not put your casts in this type of mold in pressure >20psi MAX. Any higher and the resin will be forced into the tube.
Personally I don't use this type of mold under pressure.Neil____________________________________________Every day presents an opportunity to learn something new
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12th February 2013, 11:29 PM #3
Ian wheres the pics mate?
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12th February 2013, 11:33 PM #4
Re: My First Molds
Oops sorry here is the pic guys
Neil what about the holes with no pressure? ????
Thanks Ian
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13th February 2013, 12:30 AM #5
If you need to use pressure pack the tube with Play-do or plumbers putty. Make sure it is all the way packed from one end and push it in with a dowel or skewer so you don't trap an air pocket in the middle.
Ohh yea, the molds look great.Chris B.
Klein, TX USA
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13th February 2013, 01:40 AM #6
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13th February 2013, 09:35 AM #7
The ones I made also had a few holes but worked Ok as the holes didn't go all the way along the plug. If yours do, then I guess you will need to fill them with a bit more silicon. The plugs should also be the same size as the drill for the tubes (ie larger than the tube) so that they squeeze in and seal properly.
The only issue with playdo etc is make sure there is no residue left on the outside of the tube, as this will cause a debonding issue, but easily fixed with a wipe of methoNeil____________________________________________Every day presents an opportunity to learn something new
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13th February 2013, 10:24 AM #8
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13th February 2013, 05:02 PM #9
Hey Ian those moulds look good, from what I can see the nipples are pretty good too, I dont reckon you need to fill them at all. If you dont mind me asking why do you need pressure when using these moulds?
Cheers Trev
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13th February 2013, 05:50 PM #10
Re: My First Molds
Hey Trevor
Thanks mate I am pretty happy with the way they turned out ) I am using the pressure for my snake skin blank and some other projects on the side just sick of bubbles forming after the resin starts to gel ruining my blanks :mad: and I am doing a heap of the snake skin blanks and finishing into pens for WAs first ever reptile expo in May
Ian
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13th February 2013, 05:52 PM #11
Re: My First Molds
Here is a pic of the bubble on my clicker mold there is one on both nipples and a few in the Sierra mold too
Ian
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13th February 2013, 06:48 PM #12
Ian
Try some bathroom and kitchen silicone you can get from Bunnings. I stuff I used was white and is a high quality. It's not really sticky stuff like the clear cheaper ones and set overnight and fills all the holes perfectly. It is easy to spread into the holes using a paddle pop stick or wet your finger and push it in - won't stick to a wet finger. When its dry you can trim it with a scalpel if you need to.
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13th February 2013, 09:23 PM #13
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13th February 2013, 11:06 PM #14
Me again about Molds ;-)
Hey All
Here is a pic of the types of molds I have atm. So mine has been recommended for 20psi so now the question is what about these other two what u recommend for the Resin saver and the one I got from Fred in the USA awhile back ;-)
Ian
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14th February 2013, 12:59 AM #15
For repair I just used some plain cheap clean silicone caulk on my Mold Max mold. I was not sure it would work because it was on a high stress area but it has held up. What a nice surprise Just make sure it is clean and oil free before applying.
Chris B.
Klein, TX USA
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