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Richard Marchetti <blueofnoon@aol.com> wrote:
> Any chance of sharing the knowledge wealth? Any "hobbyist-style" of producing
> elements would be of HUGE interest to me, and I suspect to others.
Sure. I might even have Jack write something up since he's the
expert. Here's his website for the Star Wars stuff, btw:
http://jsmith24.home.mindspring.com/falcon.html
> I have been given some sketchy, yet very useful, instructions about molding in
> resins -- but from what I can discern there would always be some imperfections
> (i.e. air bubbles, what have you). My assumption is that the vaccuum chamber
> is useful for making pieces without the air bubble hassles. What of the molds
> themselves? Are these metal machined molds?
Well, I definitely will ask Jack to do a little write-up for me,
because I know my explanation will be imperfect.
Yes, these will be made of resin. The air bubbles problem is
eliminated by the pressure chamber. The molds themselves are made
of a liquid rubber that hardens overnight into a fairly solid
substance.
I doubt this type of mold will be appropriate for producing
interlocking pieces, but for things like minifig weapons/accessories
I think they'll be just fine.
> What exactly is this pressure chamber and where can I get one and for how
> much?
Well, not being into the whole thing and not being the kind of
person that hangs around hardware stores, I can only give you a
layman's description.
His pressure chamber looks like a big pot - clamps and stuff to hold
the lid on. He has a fairly large air compressor that runs into it
(and I mean large - loud and huge). He also has some kind of
doohickey that sits between the compressor and the chamber and makes
it a vaccuum chamber when he needs it to be.
Probably not a lot of help, but never fear, when Jack gets the time
to do this for me (he's doing his internship as a Latin teacher
right now, so I'm not rushing him) I'll ask him to document the
process and I'll put it up on my website for all to see.
--
The parts you want and nothing else?
http://jaba.dtrh.com/ - Just Another Brick Auction
Why pay eBay? Run your own LEGO auctions for free!
http://www.guarded-inn.com/bricks/
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Message has 1 Reply:
 | | Re: I NEED A PITCHFORK!!
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| (...) It's called RTV rubber (Room Temp Vulcanizing) (...) It should be. You can take a record (with some types of RTV and casting liquid), and produce copies of it. I dare say, that the accuracy that we are striving for is likely less than this. (...) (27 years ago, 8-Nov-99, to lugnet.market.buy-sell-trade)
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Message is in Reply To:
| | Re: I NEED A PITCHFORK!!
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| (...) Any chance of sharing the knowledge wealth? Any "hobbyist-style" of producing elements would be of HUGE interest to me, and I suspect to others. I have been given some sketchy, yet very useful, instructions about molding in resins -- but from (...) (27 years ago, 7-Nov-99, to lugnet.market.buy-sell-trade)
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