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Equipment/Materials
Tweet Topic Started: May 8 2011, 06:56 PM (385 Views)
knightwalker11 May 8 2011, 06:56 PM Post #1
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right guys after this weekend and now my hoth is finished
i have decided to start making a run on the backpack accessories but need your
advice to make a mould i'm looking to go the resin root
1 - its far cheaper then vacuum forming
2 - silicone moulds can last longer

what type of materials are needed ? for silicone moulds
and what types of material need for resins

i'm also looking for hard stuff like crafting knifes and anything else i may have missed
this is something that i won't rushed into this type of project i want to take my time with
as it's something i want to do properly and right
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maverick118 May 20 2011, 10:16 PM Post #2
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Okay Marsha...I think silicone would be best especially if you're going for resin...though you might want to consider fibre glass too for something like this to make the finished piece from, vac forming would require you building a vac table and bucks to form over. Silicone moulding simply requires a good silicone to make the mould of your item, and a support/jacket so the soft silicone mould doesn't warp or deform when casting your finished item....I'm using broad terms here mind. If you post pics up of the pack so we can see if we can come up with an ideal way of doing it.

Edited by maverick118, May 20 2011, 10:18 PM.
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TANGO'D FETT May 22 2011, 09:42 PM Post #3
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Hi marsha , yeah post up the pics of the accesories and we can tell you the best way to mold them , assuming its the add on parts for the packs you are talking about not the complete backpack?
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knightwalker11 May 31 2011, 04:30 PM Post #4
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i have posted up the pictures on the other thread
can you tell what is the best silicone to get i know the min amount is usually 5kgs at about 80 quidish
is that right?
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TANGO'D FETT May 31 2011, 10:10 PM Post #5
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No marsha you can get a kilo at most suppliers for around £20 but if you are Gonna do a few then it's cheaper to buy in bulk
Edited by TANGO'D FETT, May 31 2011, 10:11 PM.
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knightwalker11 Jun 1 2011, 05:30 AM Post #6
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ok i will have a look also i was told most ppl get there stuff from these sites
http://www.ebalta.co.uk/index.html
http://www.tiranti.co.uk/index.asp
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maverick118 Jun 1 2011, 02:01 PM Post #7
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Marsha i'd steer clear of tiranti's for silcione...their stuff is not as good a quality as the silicone I get from mouldlife...it has a lot of fillers in to pad it out in my experience.

Mouldlife may be a bit pricier but their customer service is second to none, and apart from a few bits they don't supply I use them pretty much exclusively for resin, silicones etc
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knightwalker11 Jun 1 2011, 04:10 PM Post #8
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do you have the link on which is the best silicone and resin from mouldlife?

there is so many i wouldn't have a clue which 1 to get
Edited by knightwalker11, Jun 1 2011, 04:10 PM.
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maverick118 Jun 1 2011, 04:57 PM Post #9
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not on hand...the best stuff I've used for general moulding is tinsil 70-25. and the resins are easy flo 120 and 60...both are good casting resins...and produced lightweight strong castings.

I recommend getting a respirator though for resin casting...the stuff either gases styrene's in the case of polyester resin and isocyanate with urethane...get one with a cartridge system and get carts that are for organic vapours and ones for particulates when your sanding stuff
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knightwalker11 Jun 1 2011, 06:42 PM Post #10
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thanks will have a look
i still got a few more do before i order any
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TANGO'D FETT Jun 1 2011, 11:42 PM Post #11
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Heres a link to their shop Marsha , heres the silicone - http://www.mouldlife.net/tinsil-7025-11kg-starter-kit-187-p.asp

And the resin- http://www.mouldlife.net/easy-flo-60-starter-kit-19-kg-kit-178-p.asp

Martin introduced me to moldlife a while ago and i'm a convert now , silicone is great to work with and the easiflo is comparible to smooth on which is considerd the best . to get more from your resin you can also add fillers to it .
Edited by TANGO'D FETT, Jun 1 2011, 11:43 PM.
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knightwalker11 Jun 2 2011, 05:08 AM Post #12
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awesome thanks once my patrs are done going to get them from there thanks for the help
you guys are top notch
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knightwalker11 Jul 17 2011, 07:42 AM Post #13
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right i got the starter pack so on1 question how do you know how much to mix ?
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TANGO'D FETT Jul 17 2011, 01:26 PM Post #14
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Is this the silicone Marsha ? I tend to do i tby eye now as i have mixed so much in the past , there should be some info on the container or possibly a technical sheet , if you got the moldlife RTV its white with blue catalyst. Give the catalyst a shake before adding to the sililcone as well . youwant the silicone a pale blue colour when all mixed up. Sorry cant remember exact quantities but i have never had a problem with it curing which should be about 24 hours.
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maverick118 Jul 17 2011, 01:55 PM Post #15
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Your catalyst is usually 10% of the volume/weight of the batch of silicone....I do a first detail batch with 11%-12% to get it to kick a bit quicker so i get a good detail coat first...then do another when it gels at the standard 10% and two more batches with thickener added...the last coat should be like icing and i smooth it out with a kydney tool. If you have any cheese cloth or muslin add it between batches to the surface of the silicone...it means you can add tear strength and keep the amount of silicone down to a bare minimum...if you're doing a jacket and need keys get a cheap ice cube tray and pour some silicne in than and then when needed you have good keys ready and waiting.
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TANGO'D FETT Jul 20 2011, 08:33 PM Post #16
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Yeah what martin said :D
For future reference you can re-use old silicone molds in new molds , either cut into small bits or I got a meat grinder and mince thme up into small granules and it thickens it great :)
Edited by TANGO'D FETT, Jul 20 2011, 08:34 PM.
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maverick118 Jul 20 2011, 09:21 PM Post #17
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Careful only to use the same base silicone though...as in grinding up tin based for use with tin based later. As different bases can cause inhibition problems later
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TANGO'D FETT Jul 21 2011, 09:43 PM Post #18
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I knew that too ! lol

Anyway , never had a problem with my inhibitions :P
Edited by TANGO'D FETT, Jul 21 2011, 09:45 PM.
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knightwalker11 Aug 8 2011, 06:13 PM Post #19
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ok tried do the first silicone and basicly cocked it up but as it's my first time then it's best to learn the hard way
so trying it out again but this time preparing it all will have to redo one of my clay moulds but do in pieces
instead as 1 piece mould as it will lower the cost
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TANGO'D FETT Aug 8 2011, 10:13 PM Post #20
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Practice makes perfect Marsha ;)
What problems did you have , maybe we can give you a few pointers ?
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knightwalker11 Aug 9 2011, 04:45 PM Post #21
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ok much better now done 2 silicone moulds and they are perfect
much happy now going to re do my other clay moulds but this time instead of it been
1 piece mould it will be in 5 pieces so i think i'm getting there but still need more practice
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TANGO'D FETT Aug 9 2011, 11:56 PM Post #22
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Yeah sometimes a little trial and error is needed to get the end results , keep at it and let us know how you get on :)
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