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Why we didn't have 3d printers before?
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xrunner:
Yea that's really cool - but I was talking about pyramids ... I don't think they will tackle this is the near future -

Cerebus:

--- Quote from: xrunner on February 16, 2020, 12:25:12 am ---Yea that's really cool - but I was talking about pyramids ... I don't think they will tackle this is the near future -


--- End quote ---

Like I said, I think they (experimental archaeologists in general) would if they thought they could get away with it. "Excuse me Mr Mayor of Cairo, you're not actually using this bit of desert just in front of the Giza plateau are you?" You've seen the sorts that turn up on "Time Team"; chunky jumpers, pipes ("Are you sure that this is tobacco, sir?"), real ale, hats you could grow potatoes in... Mad as cheese, the lot of them.  :)
vk6zgo:
One reason was that the existing methods were highly developed & efficient for mass production.

My Dad's old job of Engineering Patternmaker, which was a complex thing, combining the skills of a sculptor, woodworker, & machinist, along with good mathematical abilities was just about gone by then with the advent of CNC, where a machine could be used to produce a pattern quickly, without any  such skills required, where the pattern was used in the time-honoured way to produce a mould, & so on.

Or

To machine the mould directly, with the "inverse" shape of the ultimate product
The same could be done for the dies used in forging.

Or

To machine the complete product from a billet of solid metal

Most of the above applies to plastics, too.
Plastic stuff was cheap as dirt to mould or extrude, or whatever, so factories really didn't stand to benefit much from 3D printing.

3D printing doesn't really seem to offer much advantage to large scale manufacturers, even now, despite all the hype.
beanflying:
A good mate of mine still in the Patternmaking business uses a mix of CNC, handwork, resin and metal that is the nature of progress. Strict handwork only patternmaking is more or less gone.

Re 3D printing you need to get out and look more at what industry is actually doing be it Aerospace building rocket motors or limited run special body trim for Automotive or just pre production prototyping or limited run performance parts. This doesn't necessarily apply to FDM consumer printers which is what I guess this topic is about but more so SLS, Resin and some of the higher end industrial process machines.

https://metal3d.com.au/automotive-industry/

It won't ever be the Star Trek replicator or replace Diecasting or Injection molding but in some cases it now makes sense.

langwadt:

--- Quote from: beanflying on February 16, 2020, 01:40:45 am ---A good mate of mine still in the Patternmaking business uses a mix of CNC, handwork, resin and metal that is the nature of progress. Strict handwork only patternmaking is more or less gone.

Re 3D printing you need to get out and look more at what industry is actually doing be it Aerospace building rocket motors or limited run special body trim for Automotive or just pre production prototyping or limited run performance parts. This doesn't necessarily apply to FDM consumer printers which is what I guess this topic is about but more so SLS, Resin and some of the higher end industrial process machines.

https://metal3d.com.au/automotive-industry/

It won't ever be the Star Trek replicator or replace Diecasting or Injection molding but in some cases it now makes sense.

--- End quote ---

https://youtu.be/nyYcomX7Lus
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