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Thread: Pressure pot

  1. #16
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    Cheers

    DJ


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  3. #17
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    Quote Originally Posted by DJ's Timber View Post
    OK, I can take a gentle hint as well as the next man!

    1 Here are all 4 blanks as they came out of the mould. They came out of the silicone rubber mould very easily, no mould release was used, and it is certainly not needed.
    From left to right experimental cast with something called Crystal Shred from one of the $2 shops, 2 wothless wood Red Gum blanks (Sierra size), bark from Red Iron bark showing my spacers to keep it off the bottom of the mould (it floeated to the top with the bark!) and another one showing a different view.

    Please note that I used the std Casting resin here, not the water clear one. It has a distinct greyish/purple colour cast to it.

    2 The bark of the Red Ironbark

    3 Crystal Shred blank, it appears to be shredded foil, black and gold.

    4 The 2 Sierra size Red Gum blanks

    Lessons learned:

    Don't cut blanks too small for worthless wood (WW) casting

    Better method needed for keeping WW blanks in place in the mould

    Take 2 coming up tomorrow.

    Anybody know how long before I can turn the Crystal Shred blank?

  4. #18
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    Looking good BS

    In regard to the wood floating, cannot remember who it was but on one of the USA forums, one of the guys who did snake skins used a square block on the ends with I think some weight in the tubes. Obviously this method would required you to drill and glue the tube first, but would this help to over come your problem? I'll see if I can hunt up the link.
    Cheers

    DJ


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  5. #19
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    Here we go, it was Don Ward from IAP I was thinking.



    This is his Tutorial
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    DJ


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  6. #20
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    Thanks DJ, I actually have that article in my pile of stuff I have been reading on casting.

    I have just come in from the shed and have cut that Crystal Shred blank and drilled it for Cigar tubes, will try to turn it after lunch. Cutting and drilling went fine, no problems there, so it seems to be cured well.

    On the WW casting, I have been reading some other articles as well and have decided to have a go at a modified method. I don't really want to cast the tubes in, mainly because I have to make up my mind before hand which pen I'm going to make. I can see that this needs to be done for the snake skins though.
    I am going to cut some square bits of wood just slightly larger than my silicone mould, say 20mm square, then glue these to the end of a 17mm square blank. This will then give me 1mm clearance around the blank for the resin, the 20mm square wood bits will give me tight fit in the silicone rubber and hold the whole lot in place.

    To be continued...............

  7. #21
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    Default Bummer.....

    Well that couldn't be called an unqualified success. Just turned the Shredded Crystal blank on a couple of Cigar tubes, and the result looks more like varicose veins than an interesting pen blank!

    Obviously need more of the stuff in there and some pigment to hide the tubes, or paint the tubes.

    The Shredded Crystal on its own look very sparkly, but that effect has been almost totally lost by incorporating it in the resin cast.

    Oh well, at least I know that the casting process produces a blank that is easy to drill and turn, sands and polishes very well too, although the blank here hasn't been fully polished yet (and won't be!)

  8. #22
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    "Oh well, at least I know that the casting process produces a blank that is easy to drill and turn, sands and polishes very well too, although the blank here hasn't been fully polished yet"

    And that the main thing. Won't be long before you have a whole range of amazing blanks

  9. #23
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    Quote Originally Posted by Big Shed View Post
    Oh well, at least I know that the casting process produces a blank that is easy to drill and turn, sands and polishes very well too, although the blank here hasn't been fully polished yet (and won't be!)
    Nice Blank BS. Why aren't you going to finish it? Maybe a bit unbalanced with the veins but I think would still make a nice pen. Do you have a good supply of spare tubes?

    And interesting mandrel. More info please
    David
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  10. #24
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    [quote=dhurrang;777806]
    Nice Blank BS. Why aren't you going to finish it? Maybe a bit unbalanced with the veins but I think would still make a nice pen. Do you have a good supply of spare tubes?
    Yes, I always buy extra tubes for any kit I buy, in this case Cigar. I will keep the blank on the tubes to remind me of my first attempt, it will go in my "not quite" box

    And interesting mandrel. More info please
    I reported on the ER25 collets here

    This set up with a 12mm collet is ideal for the closed end mandrels from Arizona Silhouette. The collet you see here is a 7-8mm for the B mandrel, I also have a 6-7mm collet for the A mandrel.
    Am buying two more MT2 chucks so I can keep the 3 most used collets permanently in each.

    I also have a MT3 chuck for the new metal lathe coming on Wednesday

  11. #25
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    Fred, I can not see the veins,but if they are there,why not fill them with colored expoy.
    Good first go,well done.
    I took your advice and put teflon tape on two threads that where only finger tight. This made a big improvement. Now from 60 psi I lose 5 Psi over 14 min , I can live with that as the polyurthane resin sets solid in about 15 min.

    I see that sam is cranked up also, and Amos has a pot,there must be others lurking also or allready casting, very soon we will need a separate casting forum.
    Regards

    Terry

  12. #26
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    Good start Fred.

    I will get around to posting my first attemps later today some good some bad I used the wrong pigment at first and the resin I used set white and took the colour out of the resin.

    New stuff on the way from Barnes.

  13. #27
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    Wow Fred, I am still reading the instructions! But you made me laugh with the "varicose Viens", Amos
    Good, better, best, never let it rest;
    Til your good is better, and your
    better, best.

  14. #28
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    Very good effort Fred ! Looks like you're on your way .
    Charles T. Hutchings
    Visit my facebook page for look at some of Chucks pens if you like.

    https://www.facebook.com/chuckspens?ref=hl

  15. #29
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    Thanks for the comments guys!

    As promised, I had another go at WW casting, this time I cut 20mm square bits of waste wood, cut the WW blanks to 17mm square (mould is 19mm square) and glued the square bits of wood to the ends making the whole assembly a push fit in the silcon mould with roughly 1mm clearance all round.

    As the photo shows, this was a resounding success.

    The one with the bit of wood in the middle has 2 Sierra size blanks glued together, to be cut apart before use, likewise the bits of wood will be cut off the ends.

    All I have to do now is turn some of these to see what they are like underneath that resin.

  16. #30
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    And another lot of blanks from the pressure pot. As Sam said somewhere else, this is as addictive as pen turning!

    Decided to do some experimenting with solid colour pigments, the 2 in the middle are white with some Pearlex 651 Pearl White added, doesn't show up in either the photo os the blank, so we will see. The other is straight Black.

    Far left is my attempt at making an M3 looking blank, second from left is White and Black poured in the mould simultaneously.

    Second from right is Gold and Dark brown poured in the mould simultaneously, OK if you are a Hawks supporter I suppose. Far right is the remaining Gold and Brown mixed in one cup and some of the Pearlex 651 Pearl White added.

    Reserve my judgment till I have turned some of these.

    There is another lot in the pot ATM, there I have gotten more adventurous.

    To be continued.............. (where is the Days of Our Lives hourglass smilie?)

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