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. Bournville Dive-In (2) MBC, 15th September

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Barrow in Furness MBC regatta and submarine event, Sunday 22nd Sept 2019,10am

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    CSS PIONEER

    nigele(ADMIN)2
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    Post  nigele(ADMIN)2 on Tue Nov 29, 2011 11:42 pm

    CSS PIONEER - Page 4 100_1359correct

    Allow the gel coat to fully cure, I usually leave it overnight to check that it has fully cured, touch the surface in several places paying paticular attention to the corners, it should feel tacky, that's normal, but no color should be on your finger. If there is it has not fully cured, leave it longer and don't be tempted to continue as it will react.

    If all is correct, I now mix the resin for the first layer which is the tissue, this is awkward to use as it is so fine and wispy, a lot of people miss this step, not a good idea you end up with air bubbles everywhere. Tissue is used to even out the surface of the gel coat, and as it's very flexible so that it can be pushed into all the nockes and crannies that matt would not go into.

    Paint the surface off the mould with the resin, lay the tissue on top and quickly and gently stipple the tissue into the resin, paying paticular attention to any sharp corners and edges. Make sure there are no air bubbles anywhere, you may find that it starts to go wispy and you start getting the same effect as you get when you put your hand on a cobweb, change brushes and go back to it with a well resin wetted brush. Get it as good as you can and leave it, it does not matter, the wisps will not affect the next layer just make sure the are no air bubbles.
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    Post  nigele(ADMIN)2 on Tue Nov 29, 2011 11:48 pm

    CSS PIONEER - Page 4 100_1360

    This is the mould with the tissue applied.
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    Post  nigele(ADMIN)2 on Wed Nov 30, 2011 12:07 am

    CSS PIONEER - Page 4 100_1361

    Allow the tissue to dry completely and make sure that the surface is cool and tack free, this is the next layer to be applied, it is 300grm mat, this is applied in a different way to the tissue, instead of putting the resin on the mould the resin is applied directly to the mat. Lay the mat on a board and brush the resin on to it, this has to be done quickly as the resin will start to disolve the bonding agent in the mat as soon as it is applied, pick up the wetted mat and place it on the mould, and do the same as was done with the tissue, this will not go wispy and you can stipple it much harder make sure to get it in all the corners and that there are no air bubbles. You can on larger moulds use a metal roller, but with this mould I just used a one inch brush, again let it dry completly.
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    Post  nigele(ADMIN)2 on Wed Nov 30, 2011 12:12 am

    CSS PIONEER - Page 4 100_1362

    A few views of the mould with 1x300grm mat on it.
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    Post  nigele(ADMIN)2 on Wed Nov 30, 2011 12:15 am

    CSS PIONEER - Page 4 100_1410
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    Post  nigele(ADMIN)2 on Wed Nov 30, 2011 12:17 am

    CSS PIONEER - Page 4 100_1411
    david f
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    Post  david f on Wed Nov 30, 2011 3:06 pm

    Very impressive seeing a Master at work.
    (Mind you I look at the photos and I can smell the resin uuuugh!)

    Glad to see that it is red.I'm not the only one with a carrot.
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    Post  Fred L. on Wed Dec 07, 2011 3:47 pm

    Very neat work !
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 2:42 pm

    CSS PIONEER - Page 4 100_1412

    On this mould I have added 1x tissue,1x 300,and four layer's off 450 matt,dont add more than two layer's at a time as excess heat will be generated and could cause the mould to catch fire.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 2:47 pm

    CSS PIONEER - Page 4 100_1413

    Now I turn the mould over and remove the shuttering,tape and plastacine.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 2:52 pm

    CSS PIONEER - Page 4 100_1416
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 2:58 pm

    CSS PIONEER - Page 4 100_1417

    Ready to laminate the second half of the mould,reapeat the same method as was used on the first half, dont forget to pva before doing anything.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:05 pm

    CSS PIONEER - Page 4 100_1418

    Should now have something that look's like this,not pretty,leave it for a day to let it fully cure.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:08 pm

    CSS PIONEER - Page 4 100_1419
    carefully remove shuttering from both ends.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:11 pm

    CSS PIONEER - Page 4 100_1420
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:16 pm

    CSS PIONEER - Page 4 100_1421

    Now clean up all the edges of the mould I use a wood saw to do this,please remember to use a dust mask for this.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:18 pm

    CSS PIONEER - Page 4 100_1422

    All edges cleaned up.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:20 pm

    CSS PIONEER - Page 4 100_1423
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:27 pm

    CSS PIONEER - Page 4 100_1424

    Now to open the mould,cut a series of wedges from scrap timber hardwood is best for this,gently tap them between the two halfs off the mould, be gentle and insure that they are evenly spaced all round the mould.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:29 pm

    CSS PIONEER - Page 4 100_1425
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:32 pm

    CSS PIONEER - Page 4 100_1426
    The first half of the mould free of the plug(patten).
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:39 pm

    CSS PIONEER - Page 4 100_1427

    Now gently pull the plug out of the second half off the mould,its worth putting the whole thing in a bath of warm water if you are having trouble getting the plug out,this dissolves the pva.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 3:47 pm

    CSS PIONEER - Page 4 100_1428

    Clean the mould up a bit,don't wash it at this stage put the two halves together ensuring they are on the locators,clamp them together and drill some holes through the edges as shown in photo,these are to bolt the two halves together,take the two halves apart and now wash them in soapy water and dry.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 4:55 pm

    CSS PIONEER - Page 4 100_1430

    The mould is now ready for use,tape along the edges that bolt together and pva both mould halfs.
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    Post  nigele(ADMIN)2 on Sat Feb 18, 2012 5:04 pm

    CSS PIONEER - Page 4 100_1431

    When the pva is dry apply a gel coat to both halves,as shown.

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