02GF74
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 posted on 17/10/08 at 09:48 AM |
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DIY chopped stand gun anyone?
wathcing mega factories where they made the winnebago - the rear panel is made from fibre glass.
mould sprayed with gel coat followed by someone spraying chopped stands over prior to it being rollered down.
looks like a much less messy method than cutting sheet and laying that down.
so.... can a sandblaster gun be modified to take cs? are these guns available cheap? and the cs?
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Chippy
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| posted on 17/10/08 at 09:58 AM |
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Spraying CS was tried by a couple of the major boat builders, and the problem is keeping an even coating, which they could not seem to overcome at the
time, (may have found a way by now), so you had nothing in some places, and 1/2" in others, so at that time the idea was dropped. It is also
very messy, in as much as it goes every where. So for the amature builder, not a good idea. IMHO Ray
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
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twybrow
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| posted on 17/10/08 at 10:02 AM |
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It is really no cleaner than hand layup. The choppers throw bits all over th eplace, and oy uneed to be fairly skilled to lay down an even laminate.
the guns themselves are quite complex, as you need to feed the glass tows, chop them into even lengths (difficult), mix the resin and catalyst and
throw the whole lot at your mould. This hten has to be rolled by hand anyway - so you still get sticky!
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02GF74
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| posted on 17/10/08 at 10:16 AM |
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ok, it looked easy on Telly but then the people have top notch production equipment as well as many hours of practise.
what strucm ke was that none of the gun operators were air wearing masks - I wuod have thought the resin would have ponged as well as breathing in
bits of strand (can't recall if they had masks on).
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smart51
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| posted on 17/10/08 at 10:31 AM |
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Lotus use sprayed on GRP quite a lot. Theire production guys were quite upset with the elise because some of the details were very sharp and very
deep so they had to go back to hand lay up on some of the panels.
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twybrow
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| posted on 17/10/08 at 02:06 PM |
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And they came out as bent as bananas!
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Hugh Paterson
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| posted on 17/10/08 at 09:47 PM |
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Chop guns
We use em in my workplace, a good un will cost in the region of £14,000, A cheapo bout £7000 or of course second hand, what you are prepared to pay.
Nowt on a 7 lookalike could justify the expense, our chop gun swallows 2 ton of resin a week if u use it in anger oh and trust me boatbuilders
still use em, one of the last jobs i done paid for the machine in two weeks???
Shug
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Peteff
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| posted on 18/10/08 at 08:20 AM |
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There's a place near here that uses them, they make prefabricated building sections like dormers and porticos. They stack their moulds outside
and you could comfortably live in some of them.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Hugh Paterson
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| posted on 18/10/08 at 08:55 AM |
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Sounds very similar to the place I work im one of the mould tool makers in our place, some of the "tools" out the back are bigger than
the containers there stacked against Cars and boats are much more interesting. Not a time to be in this game however, credit crunch has hit
construction and leisure stuff bad.
Shug
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