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'Hyperfirm' Rubber
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jegner
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Location: Texas, USA

PostPosted: Wed Aug 20, 2008 5:27 pm    Post subject: 'Hyperfirm' Rubber Reply with quote

I know this gets debated a lot, but Tony and I have come to the conclusion that 'hyperfirm' is just a nick name given to a type of resin, called Concrete Stamping Rubber.

http://www.jgreer.com/concrete%20molding.htm

or

http://www.smoothonsecure.com/store/index.php?cPath=291_1_758&osCsid=8755df43aa813ef16858cc2307e46eeb
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TK 109
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PostPosted: Wed Aug 20, 2008 7:37 pm    Post subject: Reply with quote

Question i wonder if you could make vacuforming molds out of this stuff, such as a part with a lot of undercuts, like a stormtrooper helmet face, form over that, and release easier, because of its flexible qualities?
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CJanssen
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PostPosted: Wed Aug 20, 2008 8:08 pm    Post subject: Reply with quote

hmmm, interesting concept........... Idea

i like it. Would the rubber hold its shape during the pull? Surely someone knows the answers?!
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jegner
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PostPosted: Thu Aug 21, 2008 7:30 am    Post subject: Reply with quote

Another use for the 'hyperfirm' rubber is engine mounts, and machine tooling pads. I would imagine it would hold up fine for a vac formed mold that had an undercut. I do not know it's heat resistant properties.

Jim
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tubachris85x
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PostPosted: Thu Aug 21, 2008 2:47 pm    Post subject: Reply with quote

Hyperfirm is actually a custom "recipe" that the sci-fire prop makers have themselves. You can try to replicate it, but you wont get it unless you know what they mix or if you accidently discover it through experimentation, but that'd be really expensive
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jegner
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PostPosted: Fri Aug 22, 2008 7:58 pm    Post subject: Reply with quote

Hyperfirm may in fact be a 'custom mix' but, the SmoothCast 45D is a dead ringer for the same stuff. And the JGreer Concrete Stamping Rubber is darn close, and is already black.
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TK 109
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PostPosted: Sat Aug 23, 2008 8:19 am    Post subject: Reply with quote

yes... but what's the cost of such a thing? Shocked sounds expensive.
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Stomper
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PostPosted: Tue Dec 09, 2008 9:00 pm    Post subject: Reply with quote

Well I now have some RECENT news on the Hyperfirm material.. it is NOT what me and Jim thought it was initially. I bought a second hand Hyperfirm (ANH version) E-11 that was pretty "ugly" on the outside... sloppy paint-job and weathering... excess glue-bead remnants, etc.

I have drilled into it as I'm improving it to look more like the screen used thing... anyway it's a self-skinning, VERY dense foam that is black in color. The outer skin is about 1/8" thick, then its the foam stuff. It also has a carbon fiber rod running down it's length, and a metal piece that runs down the length just above the folding stock, I believe they are using that to fix the rigid wire they are using as the armature for the trigger guard.
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jegner
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PostPosted: Tue Dec 09, 2008 10:01 pm    Post subject: Reply with quote

Good info Tony! Thanks for sharing. That starts to REALLY sound like Smooth-on's Flex-FoamiT 25.
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TK 109
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PostPosted: Mon Dec 22, 2008 10:53 am    Post subject: Reply with quote

Stomper wrote:
Well I now have some RECENT news on the Hyperfirm material.. it is NOT what me and Jim thought it was initially. I bought a second hand Hyperfirm (ANH version) E-11 that was pretty "ugly" on the outside... sloppy paint-job and weathering... excess glue-bead remnants, etc.

I have drilled into it as I'm improving it to look more like the screen used thing... anyway it's a self-skinning, VERY dense foam that is black in color. The outer skin is about 1/8" thick, then its the foam stuff. It also has a carbon fiber rod running down it's length, and a metal piece that runs down the length just above the folding stock, I believe they are using that to fix the rigid wire they are using as the armature for the trigger guard.


if you're done with that i'd be interested in it.... Wink maybe i can touch it up, and make it into a decent-looking prop!

let me know! Very Happy
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Stomper
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PostPosted: Mon Dec 22, 2008 11:08 am    Post subject: Reply with quote

LOL... but it IS a decent looking prop.... NOW! Wink

I'll post pics of it when I get some time.
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Tony Krewson
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TK 109
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PostPosted: Wed Dec 24, 2008 3:45 pm    Post subject: Reply with quote

alright then...................... LOL Laughing

jsut checking... Wink LOL
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DarthVader1
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PostPosted: Tue Feb 03, 2009 6:28 pm    Post subject: Reply with quote

Hmmm.....IMPRESSIVE, MOST IMPRESSIVE!
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Stomper
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Location: Woodburn, Oregon USA

PostPosted: Tue Feb 03, 2009 7:05 pm    Post subject: Reply with quote

Aww shoot!! I forgot to post some photos of that HF E-11 re-work I did...

1. I drilled out the end vent holes on the barrel and installed my own rubber T-tracks and tucked them into the holes... better than the original "glued on popsicle stick" looking T-tracks.

2. I ground off the (too short) subby magazine, hollowed out the mag-well, made a rubber cast of the Sterling Mag I have and stuffed that into the mag-well.

3. I hollowed out the solid cast front sight guard.

4. Added my own more accurate power cyliders (casted in rubber),

5. Casted my own rubber M38 scope (I'm not a fan of the M19 on E-11's)

6. Replaced the inaccurate "glued-on" scope rail, and installed an aluminum scope rail.

7. Installed a metal D-ring (shaped on a REAL Sterling D-ring) on the rear end cap.

8. Re-shaped the trigger guard from the "squished look", to the proper "more rounded" shape.

SOOOOoooooo....... here youse all go! Wink

HF ANH E-11 (reworked):


This is my "tricked out" MR E-11 (for comparison) that I picked up a couple years ago... SWEET, but HEAVY!!



More shots of the HF E-11(reworked):




A stock HF E-11 for you to compare the differences:



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Tony Krewson
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jegner
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PostPosted: Wed Feb 04, 2009 7:26 am    Post subject: Reply with quote

Shocked WOW! Nice! Great Job! Good info on the 'Hyperfirm'. So basically this stuff is NOT rubber, but a foam? I've not had the chance to examine one's internals, just holding one, it seemed more like the rubber from JGreer. Very interesting. I may know what they used then... More research.
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