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SMR's Workshop

Discussion in 'Workshop Benches' started by SMR CHRIS, Aug 7, 2016.

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  1. Mar 15, 2017 #41
    SMR CHRIS

    SMR CHRIS Staff Member Moderator

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  2. Mar 15, 2017 #42
    paul_l

    paul_l Staff Member Administrator

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    The detail in the moulds is impressive, if the rest comes out as well, this will be some model - how big is the rake going to be - 12 coaches maybe :avatar:
     
  3. Mar 16, 2017 #43
    SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    paul_l wrote:
    Hi Paul thanks would be nice to have a 12 car train of 12 wheelers but will need to build some other types/variations
    May be 6 all up that's will be long enough

    Some photos of the bits that go to making the casting

    The master above the mould
    [​IMG]MCE / VHO build in O scalebyCHRIS, on Flickr

    Mould
    [​IMG]MCE / VHO build in O scale by CHRIS, on Flickr

    Filling the VHO with urethane resin
    [​IMG]MCE / VHO build in O scale by CHRIS, on Flickr

    Starting to cure
    [​IMG]MCE / VHO build in O scale by CHRIS, on Flickr

    Cured now all white
    [​IMG]MCE / VHO build in O scale by CHRIS, on Flickr

    Copy of blue print of MCE
    [​IMG]MCE / VHO build in O scale by CHRIS, on Flickr

    End result
    [​IMG]MCE side 2 and VHO Guards van test castings in O scale by CHRIS, on Flickr
     
  4. Mar 16, 2017 #44
    SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    Test castings 3 lower from old batch of resin not formed 100% and slight colour variation, top 3 casting from new batch of resin this flows nicer and is giving better filling of the mould consistency with across the length consistent thickness unlike the older resin

    Attached files [​IMG]
     
  5. Mar 16, 2017 #45
    jakesdad13

    jakesdad13 Staff Member Moderator

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    They look great Chris, I have a resin 6 wheeler coach kit in the shed, it is appalling, I was thinking of using it as a pattern for making one in plasticard, after seeing the results of your casting I may have a go at casting my own!

    Cheers, Pete.
     
  6. Mar 16, 2017 #46
    SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    Sounds like a bit of work coming up Pete the urithane can be a bit of a Chalenge at the start
    I use a quick Set PVAto glue it together and plasti bond to strengthen at corners as needed
    The best thing to do is clean up all the parts and and see if they will fit together do any mods first then make your mould
     
  7. Mar 16, 2017 #47
    paul_l

    paul_l Staff Member Administrator

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    I feel a how-to on mould making and casting in the near future :avatar: :thumbs:, I'll get popcorn ready in just in case.

    Paul
     
  8. Mar 17, 2017 #48
    cmcan

    cmcan Full Member

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    Chris

    Up to your usual high standard.

    I think my friend with the subs might need to come and talk. He could glean some things from you

    Btw where did you get the carriage plans from?

    Cameron
     
  9. Mar 17, 2017 #49
    Gary

    Gary Wants more time for modelling.... Staff Member Administrator

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    Great work Chris. :thumbs::thumbs::thumbs: Very nice, crisp moulds indeed. Did you cast the mould off a model or scratchbuild them ??

    Really looking forward to seeing these coaches develop. Keep the good work coming.

    Cheers, Gary.
     
  10. Mar 17, 2017 #50
    ianvolvo46

    ianvolvo46 Staff Member Moderator

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    Phew Chris you've upped the modelling game by a mile or 2 but still fascinating :thumbup::thumbup:
     
  11. Mar 17, 2017 #51
    SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    cmcan wrote:
    Cameron you friend with the subs would really like what My friend John is building it's a Japanese midget sub from scratch he's slowly doing bits in between making oneoff 1:43 scale model cars mainly classics that have never been mass produced for people that want a model just like the one in their garage, and the model trains and tram bits, for the midget sub he has a copy of the scale plans drawn originally by the Australian Navy, the body masters are well underway it is a impressive looking bit of kit even at the master stage,

    John is the master caster of bits he drafts up plans and he runs with it next thing there a perfect copy sitting there and you only start with a photo or Basic line drawing.

    John also has contacts from his drafting background that really assist in the model making, (those models you see that are for building project high rises etc etc) those guys have access to lazer cutters etc that the rest of us can only dream of for making parts that go into the master to make moulds off.

    This photo shows the laser cut window frames for the crown light windows and the overlays that form the glass frame etc
    [​IMG]Laser cut parts that go to making pattern masters by CHRIS, on Flickr

    As for the original railways plans anyone can get from the rail historical research centre but some of the ones we have have been around for many years being work shop drawings.

    There are lots of drawings to source from in the panel files one for goods one for passenger

    Attached files [​IMG]
     
  12. Mar 17, 2017 #52
    SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    paul_l wrote:
    Will do a photo record of the next wagon as usually forget to take photos along the way getting more in the swing of it now

    Going to do a 4 wheel wagon next will be a good how to I think not over the top like the 72-6" passenger cars.

    Gary wrote:
    The moulds are taken off a styrene hand made masters no copy's of models :scratchchin: none available to copy off in O scale be much easier if there was one.
     
  13. Mar 17, 2017 #53
    Keith M

    Keith M Staff Member Moderator

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    I must admit I'd like to know how to do resin casting and possibly the mould making too, as It's something I've never done but wouldn't mind having a go at. Over time, I've bought odd resin castings from sellers who are obviously low volume 'home business' folks, but it could be a useful asset if there was something I wanted that just wasn't available commercially. Over to you, Chris.
    Keith.
     
  14. Mar 17, 2017 #54
    jakesdad13

    jakesdad13 Staff Member Moderator

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    This has been on here before, I made some araldite brake shoes for my Andrew Barclay scratch build, using domestic mastic for the mould, it would be no good for anything large but it shows what is possible.
    This is the plasticard box with the plasticard master glued in side

    [​IMG]

    I filled the box with mastic, I used cooking oil for a release agent, it took a couple of go's to get it right.

    [​IMG]

    These are the finished brake shoes on the loco.

    [​IMG]

    These close up pic's are cruel but they do look better painted in the flesh, so to speak.

    Cheer's, Pete.
     
  15. Mar 17, 2017 #55
    SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    There you Go a ready done mini tutorial thanks Pete
    Nice job
     
  16. Mar 18, 2017 #56
    jakesdad13

    jakesdad13 Staff Member Moderator

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    Cheer's Chris, it was something I saw demo'd at a model rail show 5 or 6 years ago, the guy was really good at it, way better than my effort's, but he was doing it regularly so I imagine the more you make the better the end result, this was my first (and last) attempt.

    Pete.
     
  17. Mar 19, 2017 #57
    SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    Started painting the carriage side castings today.
    I ran out of primer being so big they take a lot of primer to cover both sides I'm guessing you would paint 15 + HO/OO models with the amount needed to cover a coule of these O scale models
    I will need to get more on Monday.

    Some of the sides primed
    [​IMG]Some of the sides primed MCE 12wheeler & VHO guards van by CHRIS, on Flickr
     
  18. Mar 19, 2017 #58
    Ron

    Ron Full Member

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    Look nice crisp castings Chris, what did you use for the moulds?
     
  19. Mar 19, 2017 #59
    SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    The moulds are made with very flexable rubber specialy made for casting Urithane mouldings
    Close up of the rubber Mould
    [​IMG]MCE / VHO build in O scale by CHRIS, on Flickr
     
  20. Mar 22, 2017 #60
    SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    Been painting the car sides in what is referred to as Tuscan and Russet
    [​IMG]VHO and MCE paint going on by CHRIS, on Flickr

    I used a bow pen to add the yellow waist lining
    Been a while and first time using Acrylic Tamya paint so had a few practice goes on the not quite right Guards van casting that I painted then moved to MCE Acyrlic isn't as easy as the old humbrol enamel
    But all out of Humbrol yellow

    [​IMG]VHO and MCE paint going on by CHRIS, on Flickr

    and now I the paint is dry I am now fitting the windows there are all individual windows to give a realistic look rather than the clear strip behind the window frame, they consist of main window pain and the crown light above 76 in total, then 4 single doors glasses and the corridor connectors have 2 each so 4
    84 individuals windows to install
    The idea was that these are laser cut and should just drop in however this isn't happening there mist be a bit of tolerance in the laser cut as am having to file each to fit as are slightly random when they should be all the same :facepalm:

    2 hours to fit 20 :hammer:
    It will look good in the end but it's repedative:faint:
    More tomorrow I think eyes are hanging out after having only 3hours sleep in the last 40 hours :facepalm:

    Attached files [​IMG]
     
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