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White metal casting -first try

Need some advice, got a good weathering tip, discovered some great paints or tools?
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BigReg
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Re: White metal casting -first try

#11

Post by BigReg »

She was armless, and a little bit short in the leg department too......

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Re: White metal casting -first try

#12

Post by BigReg »

Success at Last!

The solution was to build up around the parts with the modelling clay using only the smallest amount of clay. This gives a much flatter surface for the first layer of rubber. Also Sera suggested having the masters with the wheels closest to where the hot metal would be coming in. Also as they are so small a tiny dap of superglue was used to hold the masters in place. To ensure an easy separation ordinary Vaseline was painted on immediately before the second pour.

When everything was set the edges of the mould were trimmed and the mould opened and it did so cleanly. Under Sera's instruction channels were cut in the mould for the metal to pour and airvents made to allow air to escape. The two halves of the mould were held together after a dusting of talc (nice smell too!) with two squares of hardbord. Thick rubber bands were used to hold everything together.

As Sera is a professional model maker we were able to use her big metal melting pot. A small scoop of metal into the top of the mould and 10 minutes later opened up and out pops your parts!

The excess meat was removed and put back in the pot. Within 40 minutes I had 6 copies. One happy bunny!

David
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pbhawkin
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Re: White metal casting -first try

#13

Post by pbhawkin »

well done. They look very good.
Regards
Peter

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bluedonkey99
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Re: White metal casting -first try

#14

Post by bluedonkey99 »

Sounds like a productive day.
Alway great to have the advice from a pro to pick up on those hints and tips that lead you to the desired results wbypassing some of the trials and tribulations.

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smeg1959
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Re: White metal casting -first try

#15

Post by smeg1959 »

Great work, David. Mass production of undercarriage components can now proceed ... ;)
OTB ...
GB13 - Late 298 (Aeronavale), Bf109E-3a Strela (Bulgarian AF), ČKD LT vz.38 Praga (Slovakian Army)

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Re: White metal casting -first try

#16

Post by ajmm »

Congratulations. What are your production quotas for the first Five Year Plan?

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Re: White metal casting -first try

#17

Post by BigReg »

Four sets for me and a load for Bootneck42.

bootneck42
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Re: White metal casting -first try

#18

Post by bootneck42 »

Better get ready to buy shares, when David floats this business on the FTSE and DOW he will be rich (but only in our esteem).

Mike
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F_IV
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Re: White metal casting -first try

#19

Post by F_IV »

An invitation to his casting couch to inspect his undercarriage may soon follow.

If you decide you want a more hands off approach it could be worth checking out the jewellery trade in your area. Often there are dedicated casting services available who can do quite intricate stuff at a very reasonable price. Below is an example of one of their moulds, which are cut to locate together in such a way that there is no flash. Many places do bronze casts as well as precious metal, so at about Au$40 for the mould and 5 cents a gram you can get quite a lot done for only a small outlay. I think Eduard do this for their metal items.
IMG_7501.JPG

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smeg1959
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Re: White metal casting -first try

#20

Post by smeg1959 »

Casting couch ... :lol:
OTB ...
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