I thought it was going to be the titanic when it was about halfway
through loading.  Nice looking model, even if I don't know what it is.
:)

-Mike

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Nice! I thought it was a tunnel boring machine.

Doug Eichenberg wrote:

>  No, it's not a submarine!Something I'm doing for work... thought I'd
> share it.  The original is much larger in resolution, so some of the
> smaller details (like the threading) don't show here.  It's a cut-away
> model of an injection molding assembly.  It was created in AutoCAD
> from blueprints, then exported as a series of .3DS files.  I imported
> the .3DS files into PolyTrans and converted them into a POV
> smooth_triangle mesh.  The final POV file was a whopping 57.6 meg.How
> it works: The plastic (in pellet form) is fed into the large hole at
> the upper left and the cylinder is heated by the heater bands that are
> wrapped around it.  The temperature ranges from 300-900 degrees
> fahrenheit, depending on the resin used.  The screw spins inside the
> cylinder and forces the melted plastic out the nozzle orifice and into
> a mold.  That's the basic synopsis, anyway.  The vertical cylinders
> are thermocouples.
> --
> Doug Eichenberg
> http://www.nls.net/douge
> dou### [at] nlsnet

--
Come visit my web site:-) : http://www.geocities.com/~thomaslake/

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In article <39874fa3@news.povray.org>, "Doug Eichenberg" 
<dou### [at] nlsnet> wrote:

> The final POV file was a whopping 57.6 meg.  

Ouch...talk about inefficient. I don't see anything here that couldn't 
be done easily with CSG and have a much smaller file size...the threads 
on the screws would be the hardest part. They would be possible with 
CSG, but probably the best way to do it would be an isosurface. But I 
guess you used meshes because it originated as an AutoCad file...

One suggestion: make some more surroundings. Maybe place it on a wood 
surface, so the metal has more to reflect.

-- 
Christopher James Huff - Personal e-mail: chr### [at] maccom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://homepage.mac.com/chrishuff/
TAG Web page: http://tag.povray.org/

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I hate to say it, but I knew it for what it was when I saw it.
There was a time when I was interested in plastics and how they 
were worked. In the course of my reading I have seen similar 
injectors. This one looks very much like the pictures I saw.
You have done a good job at the modeling.
Mr. Art

> Doug Eichenberg wrote:
> 
> 
> No, it's not a submarine!
> Something I'm doing for work... thought I'd share it.  The original is
> much larger in resolution, so some of the smaller details (like the
> threading) don't show here.  It's a cut-away model of an injection
> molding assembly.  It was created in AutoCAD from blueprints, then
> exported as a series of .3DS files.  I imported the .3DS files into
> PolyTrans and converted them into a POV smooth_triangle mesh.  The
> final POV file was a whopping 57.6 meg.
> How it works: The plastic (in pellet form) is fed into the large hole
> at the upper left and the cylinder is heated by the heater bands that
> are wrapped around it.  The temperature ranges from 300-900 degrees
> fahrenheit, depending on the resin used.  The screw spins inside the
> cylinder and forces the melted plastic out the nozzle orifice and into
> a mold.  That's the basic synopsis, anyway.  The vertical cylinders
> are thermocouples.
> 
> 
> 
> --
> Doug Eichenberg
> http://www.nls.net/douge
> dou### [at] nlsnet

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> I hate to say it, but I knew it for what it was when I saw it.
> There was a time when I was interested in plastics and how they
> were worked. In the course of my reading I have seen similar
> injectors. This one looks very much like the pictures I saw.
> You have done a good job at the modeling.

Glad to hear someone else recognized it!  I see these things everyday at
work (I'm a design engineer for a company called Plastic Process Equipment).
I've seen some incredibly complex mixing screws, a couple feet in diameter
and so large you need a truck to move them.  I even designed one that was
used to inject meat by-products into dog bone molds.  I once designed a
screw used by a company making solid rocket propellant.  The temperature had
to be kept to very strict tolerances to avoid any unfortunate mishaps.



- Doug Eichenberg
  http://www.getinfo.net/douge
  dou### [at] nlsnet

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How about adding a sense of scale?
You could add something to the scene like the tip of a pencil, the whole
pencil, or the pencil delivery truck-- whichever is appropriate ;-)

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before i read i thought it was a down hole crude oil pump

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also you might want to try some very very small scratches on some of the
metal and some texture or somthing so it looks like real

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On Tue, 1 Aug 2000 18:31:01 -0400, "Doug Eichenberg" <dou### [at] nlsnet>
wrote:

>No, it's not a submarine!

I see perfectly well what it is and I hate it! No, not your model,
it's perfect and there lies the problem -- it reminds me of my
Manufacturing Processes exam in September :((

Really, really good modelling!


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] usanet
TAG      e-mail : pet### [at] tagpovrayorg

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i worked in rotomolding, but not injection molding.  fun college job.

Doug Eichenberg wrote:
> 
> > I hate to say it, but I knew it for what it was when I saw it.
> > There was a time when I was interested in plastics and how they
> > were worked. In the course of my reading I have seen similar
> > injectors. This one looks very much like the pictures I saw.
> > You have done a good job at the modeling.
> 
> Glad to hear someone else recognized it!  I see these things everyday at
> work (I'm a design engineer for a company called Plastic Process Equipment).
> I've seen some incredibly complex mixing screws, a couple feet in diameter
> and so large you need a truck to move them.  I even designed one that was
> used to inject meat by-products into dog bone molds.  I once designed a
> screw used by a company making solid rocket propellant.  The temperature had
> to be kept to very strict tolerances to avoid any unfortunate mishaps.
> 
> - Doug Eichenberg
>   http://www.getinfo.net/douge
>   dou### [at] nlsnet

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