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defiler W.I.P.
Otterman
 Post subject: defiler W.I.P.
PostPosted: Fri Jun 06, 2008 2:40 pm 
And now for another update of this infinitely prolonged thread...

Claw mold has performed 2 consecutive good casts. It seems fragile. Hopefully it can hold out.

Performed test pour of the mitten mold last night, but the girlfriend came over, so I never cracked the mold open to see what happened.
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Otterman
 Post subject: defiler W.I.P.
PostPosted: Fri Jun 06, 2008 9:53 pm 
Mittens mold successful on the first try.
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Dwarf Supreme
 Post subject: defiler W.I.P.
PostPosted: Mon Jun 09, 2008 2:05 pm 
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Yay!  :cool:

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Otterman
 Post subject: defiler W.I.P.
PostPosted: Tue Jun 10, 2008 4:50 pm 
The claw tine mold is proving to be very erratic. Sometimes I get 2 consecutive good casts, sometimes none. I did manage enough casts to satisfy the deal that Illuvitar and I had worked out.

Looks like another mitten mold is in the future.
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illuvitar
 Post subject: defiler W.I.P.
PostPosted: Tue Jun 10, 2008 5:13 pm 
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good news for me. almost sorry i got you into this bro, but i dont think anyone else would have gotten copies if i had tried it myself. id have hit it with a hammer about half way through  :)

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Otterman
 Post subject: defiler W.I.P.
PostPosted: Tue Jun 10, 2008 6:33 pm 
That's OK, brother. I have nothing to blame but my own pride, thinking I could pull off those claws.
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Otterman
 Post subject: defiler W.I.P.
PostPosted: Fri Jun 13, 2008 3:49 pm 
First half of second mitten mold poured.

Tonight I'll weigh the molds and figure out how much silicon has gone into this project.
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illuvitar
 Post subject: defiler W.I.P.
PostPosted: Fri Jun 13, 2008 4:09 pm 
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more than a stripper convention, thats for sure :p

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Otterman
 Post subject: defiler W.I.P.
PostPosted: Fri Jun 13, 2008 11:55 pm 
14 ounces. About 2.5 of that was from wasted molds. This is an average amount of waste for most of my projects.
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Otterman
 Post subject: defiler W.I.P.
PostPosted: Wed Jun 18, 2008 2:55 pm 
The molds have begun growing brittle and sticky. Either that, or my Ease-Release needs replacing.
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Reaver
 Post subject: defiler W.I.P.
PostPosted: Wed Jun 18, 2008 3:36 pm 
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(Otterman @ Jun. 18 2008,14:55)
QUOTE
The molds have begun growing brittle and sticky.

An inevitable consequence of casting Chaos stuff...

Just you wait until the whispering voices start! :devil:

Regards,
Reaver

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Reaver
 Post subject: defiler W.I.P.
PostPosted: Wed Jun 18, 2008 3:39 pm 
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Seriously, though - I have had this problem when casting with very small amounts of resin. Generally it's because the mix is not exactly right, slightly too much of one of the components. It doesn't generally matter with larger pours, but with the small stuff a tiny mismatch in the quantities of the resin components can cause all sorts of weird effects.
Have the parts cured and released okay?

Regards,
Reaver

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Otterman
 Post subject: defiler W.I.P.
PostPosted: Wed Jun 18, 2008 3:45 pm 
The exact timeline was this:
Pour afternoon Sunday
Remove early Tuesday
Resin pieces were solid, but wanted to stay stuck to the molds. When that happens, the danger is a little bit of silicon might come away with the cast piece, damaging or ruining the mold (but you know this already).

The pour size was 7.5ml of each component. Although I do have a lot of experience with this size of pour, you're right - sometimes the ratio can go off and weird things happen.

I was also using the last of a can of Ease Release.

I'll do another pour during lunch today. Hopefully the new can of ER and/or more accurate mix will help the situation.
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Reaver
 Post subject: defiler W.I.P.
PostPosted: Wed Jun 18, 2008 4:28 pm 
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(Otterman @ Jun. 18 2008,15:45)
QUOTE
The exact timeline was this:
Pour afternoon Sunday
Remove early Tuesday

Do you normally leave it in that long?
I find when I leave things in longer than half an hour I start to get problems with moulds tearing.

Another trick which I've used is to post-cure the moulds before use. After they're first made, remove the master, and put them in the oven for 4 hours at 60 to 80 degrees C. It helps with mould life.

Of course, your rubber might be different to mine - maybe check with the manufacturer first.
Regards,
Reaver

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Otterman
 Post subject: defiler W.I.P.
PostPosted: Wed Jun 18, 2008 5:04 pm 
No, not normally. Usually just an hour's cure time.
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