Hellboy Costume - Complete!

Re: Hellboy Costume - sculpt is complete!

***** ******! Brilliant work mate! Can't wait to see the whole thing together. I'll keep this thread in my favorites.

Keep it up mate
 
Re: Hellboy Costume - sculpt is complete!

Looks really good. Was curious though how will you be removing your core if you don't have a 2 piece mold? Or are you not going to run the silicone with a core?
 
Re: Hellboy Costume - sculpt is complete!

Looks really good. Was curious though how will you be removing your core if you don't have a 2 piece mold? Or are you not going to run the silicone with a core?

Thanks!

Once the rubber has cured, I'll be making a 2 piece mother mold for it out of Poly 1512. Once that has cured, I'll remove the mother mold and cut a single seam into the back of the head, then peel the inner mold off the core. It will leave me with only one seam to deal with after casting, and about half that seam will be covered by hair.

Layer 3 is done!
 
Re: Hellboy Costume - Molding in process!

4th layer done. 1 more smoothing layer to go and then it needs to sit until this weekend. Then it will be time to make the mother mold!
 
Re: Hellboy Costume - sculpt is complete!

Ah gottcha, I was thinking that was resin not rubber for some reason. I have only ever known silicone to be run in glass molds (no need for a inner and mother mold) with a seam line. That's how most of the big dogs seem to do it anyway. :)
Look forward to seeing a casting.

Thanks!

Once the rubber has cured, I'll be making a 2 piece mother mold for it out of Poly 1512. Once that has cured, I'll remove the mother mold and cut a single seam into the back of the head, then peel the inner mold off the core. It will leave me with only one seam to deal with after casting, and about half that seam will be covered by hair.

Layer 3 is done!
 
Re: Hellboy Costume - sculpt is complete!

Ah gottcha, I was thinking that was resin not rubber for some reason. I have only ever known silicone to be run in glass molds (no need for a inner and mother mold) with a seam line. That's how most of the big dogs seem to do it anyway. :)
Look forward to seeing a casting.

I had contemplated fiberglass, but I just didn't feel confident enough in my fiberglassing skills to risk this sculpt getting ruined trying to mold it. This stuff was super easy to use (1:1 ratio with lots of pot life), and while it was kind of pricey, it should get the job done. I might play around with fiberglass when I mold the tail. At least that won't be as complex a sculpt if I end up having to redo it.

Inner mold is now done, and will be curing until Saturday!
 
Re: Hellboy Costume - Molding in process!

Outstanding work, I would be very interested in a mask in the near future.:thumbsup
 
Re: Hellboy Costume - Molding in process!

remember your registration keys for the mother mold to mate with the inner mold correctly
 
Re: Hellboy Costume - Molding in process!

remember your registration keys for the mother mold to mate with the inner mold correctly

No problems there!

I just layed down the first layer of resin. Here's what it looked like right before.
 
Re: Hellboy Costume - Molding in process!

Hard to see in that shot. Did you not put registration keys in the mold rubber? It may have a tendency to want to shift in the jacket if there are no keys.
 
Re: Hellboy Costume - Molding in process!

Hard to see in that shot. Did you not put registration keys in the mold rubber? It may have a tendency to want to shift in the jacket if there are no keys.

I was worried about this very thing, so I decided to take as many precautions as I could think of. I built up a section of the rubber mold on the nose which will get drilled through and a bolt put in, which should hold the front in place. Plus I left plenty of flashing on the bottom, and will bolt the core into the rubber mold and mother mold as well. That should hold the bottom in place. I did the same thing to the rear where the seam will get cut. Speaking of the rear, I decided to go with a 3 part mold; 1 part in the front and 2 in the rear. The inner mold will get squished into the mother mold, which I'm hoping will minimize the seam.
 
Re: Hellboy Costume - Molding in process!

Getting ready to mold the first part of the back tonight. Getting all the WEP clay off of the front part of the mold was a PITA.

Here's a picture of that built up seam I put in the back. The mother mold will squish against it on each side and bolts will go through it.
 
Re: Hellboy Costume - Molding in process!

One last section to go and then I can FINALLY demold! Should be popping this thing open on Wednesday!
 
Re: Hellboy Costume - Molding in process!

One of three things just happened:

1. I encased my sculpt in rubber and resin, never to be able to disassemble it again

2. I successfully created a mother mold around a rubber mold that sucks

3. I successfully created a rubber mold and a mother mold

Place your bets! We'll find out the answer tomorrow!
 
Re: Hellboy Costume - Molding in process!

Just demolded. Didn't go quite as nicely as I would have hoped. The inner mold came out very nice; only one seam to deal with, and it's in the back of the head. From what I can tell, the rubber captured the detail of the sculpt perfectly.

The mother mold on the other hand didn't fare so well. The rear 2 pieces came off beautifully. The front piece, however, didn't have the same fate. I'm going to have to do some repairs and reinforcement on it. Not sure if it was undercuts, weak spots, or bonding that caused it to stick so bad.

No pictures today. Just need to walk away from it for a while and think about how to salvage.
 
Re: Hellboy Costume - Molding in process!

Did you use a mould release? If not that's why it stuck. Smooth on make a mother mould fibrous resin that is much easier to use than a fiberglass jacket. It's fast setting too.....
 
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