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Extrusion Press

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Paul Boscott19/12/2009 17:46:10
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I have started my latest model a 2 year project to make a working model of an extrusion press from photos and memory if any one would like to help me fill in the gaps please visit my website thank you for your time
 
All being well you should be able to see it working at the 2011 Model Engineering Exhibition.
 
Paul Boscott
 
Paul Boscott28/12/2009 11:22:49
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I have updated my web site http://www.boscott.co.uk/
added wanted page and new drawings
 
Paul Boscott
JasonB28/12/2009 13:32:28
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Paul, can I ask what sort of size this model will end up? All I can see in the spec for the full size is its weight and using the cube rule the model will weigh in at around 160kg assuming similar materials.
 
Looks like you will have a lot of milling to do if no one cumes up wiyh a source of UB, There are brass ones available but only upto 10mm.
 
Jason
Paul Boscott28/12/2009 14:51:07
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Jason

Thank you for your interest

The baseboard that I am currently looking at is 60 inches long by 28 inches wide (must go through a standard door) this includes a short section of cooling table to extrude on to. The actual press part of the model as in the website drawings is 38 inches by 15 inches but there is the billet furnace yet to add to the width.

The intention is to fit it on to a wheeled box like structure with the computer controls and pump in the base and a hinged side that opens up to make a half size mock up of the real control desk. To include temperature, pressure indication and computer mimic screen as well as the fully manual set of command switches.

Paul

Paul Boscott21/03/2010 08:11:46
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Hello All
 
Project on schedule drawings 90% complete and first two parts made seehttp://www.boscott.co.uk/index.html
 
Paul
 

 
Paul Boscott04/07/2010 18:40:19
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At last a weekend in the workshop see http://www.boscott.co.uk/modelphotos.html
 

The assembly you see is 5" long
 
Paul
Paul Boscott25/07/2010 20:31:48
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Model finish

 >>

How accurately should a model reflect the finish of the original?

 >>

The quandary that I have is that the finish on the actual extrusion press that I am making as a 1/12 scale model is in some places where it did not matter is to say the least is rough some of the parts have been flame cut and the rough edges smoothed of with an angle grinder though the mating faces were surface ground. see http://www.boscott.co.uk/photos.html I have heard the fitters at the time refer to this as Russian tank manufacture (a reference to the system where the finish is only controlled by the actual engineering requirement to minimise workshop hours)

 >>

My question to you as model engineers is should I reproduce the machine as it actually was or should I improve the look of the finish to a better standard?

 >>

Paul
Ian S C26/07/2010 06:12:59
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I think you should model it as per the full size machine, and explaned in any write up as you have done above. the finish is going to be reasonable at any rate, ie not too well finished hand filed, or groud up with the Dremel. Ian S C
JasonB26/07/2010 16:28:27
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I would also try to get the same finish, if the 1/35th tank boys can do it then at 1/12 it will be far more noticable. You may just get away with a hacksawn finish to represent the flame cut edges.
 
But you can bet when its finished someone will come along and say "he hasn't even filed the edges"
 
Jason

Edited By JasonB on 26/07/2010 16:28:50

Paul Boscott12/09/2010 21:53:30
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Just to let you know that progress is being made check
 
 

Parts
 
 

Compleat Assembly
 
I have tested it using compressed Air and it works correctly
 
See for full set of information http://www.boscott.co.uk/modelphotos.html 
John Olsen13/09/2010 09:31:34
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I hope you are keeping full drawings and will do a write up in the magazine later since it would be a nice change from all the locos...
 
regards
John
Paul Boscott14/09/2010 13:34:33
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John
 
Thank you for your intrest I am making a drawing sheet for each part as I go. I have drawn up the compleat press assembled using AutoCad to ensure that the bits wil all fit togeather before I statred to machine any thing
 
Paul

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