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Posted by Cheshire Steve on June 20, 2008, 7:20 pm
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Hope the links here work as mere description is not enough - I would
like to reproduce at small scale four of these column transition
pieces, each with both corner and centre 'petals' as well as metal
angular fillets between, and the Victorians really have me beaten.
Maybe the only way is to carve a pattern and then cast them, in which
case any guidance on lost wax/investment casting would be welcome - I
can't see how they can be machined from solid.
http://uk.geocities.com/iron_museum/image/Detail4.jpg
http://uk.geocities.com/iron_museum/image/Detail5.jpg
This is the only ornate part of the entire engine, so can hardly be
ignored.
Steve
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Posted by Mark Rand on June 20, 2008, 8:27 pm
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On Fri, 20 Jun 2008 16:20:28 -0700 (PDT), Cheshire Steve
>Hope the links here work as mere description is not enough - I would
>like to reproduce at small scale four of these column transition
>pieces, each with both corner and centre 'petals' as well as metal
>angular fillets between, and the Victorians really have me beaten.
>Maybe the only way is to carve a pattern and then cast them, in which
>case any guidance on lost wax/investment casting would be welcome - I
>can't see how they can be machined from solid.
>
>http://uk.geocities.com/iron_museum/image/Detail4.jpg
>http://uk.geocities.com/iron_museum/image/Detail5.jpg
>
>This is the only ornate part of the entire engine, so can hardly be
>ignored.
>
>Steve
Look carefully at the way a Pozidriv screwdriver bit is machined for
inspiration. Then machine the petals using either CNC or a jig to guide the
milling table a la engraver. Attach the square top of the column as a separate
piece.
Do I get a prize?
regards
Mark Rand
RTFM
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Posted by SDL on June 21, 2008, 4:17 am
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Machine basic shape in Brass.
Mill out pockets for detail and fill with milliput.
Carve to shape
Get cast by lost wax in material of choice here
http://www.prop-shop.co.uk/indexHolding.php
Steve Larner
Enquiries
Phone: +44 (0)1295 263134 ext. 213
Fax: +44 (0)1295 270461
Email: info@prop-shop.co.uk
Prop Shop
Swan Precision Castings & Engineering Ltd.
Swan Close Rd.
Banbury
Oxfordshire OX16 5AL
No connection went around the Iron Foundry and lost wax with the club.
--
SDL
------------------------------------------------------------------------
SDL's Profile: http://www.rcgroups.com/forums/member.php?u=177565
View this thread: http://www.rcgroups.com/forums/showthread.php?t=882551
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Posted by Alister Nicholls on June 21, 2008, 4:18 am
Please log in for more thread options On Fri, 20 Jun 2008 16:20:28 -0700, Cheshire Steve wrote:
> Hope the links here work as mere description is not enough - I would
> like to reproduce at small scale four of these column transition pieces,
> each with both corner and centre 'petals' as well as metal angular
> fillets between, and the Victorians really have me beaten. Maybe the
> only way is to carve a pattern and then cast them, in which case any
> guidance on lost wax/investment casting would be welcome - I can't see
> how they can be machined from solid.
>
> http://uk.geocities.com/iron_museum/image/Detail4.jpg
> http://uk.geocities.com/iron_museum/image/Detail5.jpg
>
> This is the only ornate part of the entire engine, so can hardly be
> ignored.
>
> Steve
Turn the column to the basic shape minus the red bits. Cast the details
in soft solder or other low melting point material and glue them on. Once
painted nobody will know how you need it.
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Posted by Brian Lambert on June 21, 2008, 4:25 am
Please log in for more thread options 4 axis CNC will get you close enough. Or cast in resin and then paint.
HTH Brian
> Hope the links here work as mere description is not enough - I would
> like to reproduce at small scale four of these column transition
> pieces, each with both corner and centre 'petals' as well as metal
> angular fillets between, and the Victorians really have me beaten.
> Maybe the only way is to carve a pattern and then cast them, in which
> case any guidance on lost wax/investment casting would be welcome - I
> can't see how they can be machined from solid.
>
> http://uk.geocities.com/iron_museum/image/Detail4.jpg
> http://uk.geocities.com/iron_museum/image/Detail5.jpg
>
> This is the only ornate part of the entire engine, so can hardly be
> ignored.
>
> Steve
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>like to reproduce at small scale four of these column transition
>pieces, each with both corner and centre 'petals' as well as metal
>angular fillets between, and the Victorians really have me beaten.
>Maybe the only way is to carve a pattern and then cast them, in which
>case any guidance on lost wax/investment casting would be welcome - I
>can't see how they can be machined from solid.
>
>http://uk.geocities.com/iron_museum/image/Detail4.jpg
>http://uk.geocities.com/iron_museum/image/Detail5.jpg
>
>This is the only ornate part of the entire engine, so can hardly be
>ignored.
>
>Steve