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"For the sciences, the way to change science's perception of things is to wait until all the old farts have died off."
- Larry Niven
 |
| Plastic Constructor (3D Printer) | ||
| A 3D printer - for spaceships. |
This is the earliest description of what we now call a flexible 3D printer that I've ever seen; it works differently from the ones that deposit a layer using tiny blobs of material.
| "...here’s a construction machine I’ve built."
“Ordinarily, you make a specialized machine-tool to turn out one particular part, and it will produce that part cheaper than any other method can do. But if you try to change the product, the machine is useless. You get efficiency at the cost of flexibility. “For that reason, there aren’t any mass-production machines for big objects like ships and so on. It’s cheaper to be inefficient and flexible. But this constructor is both efficient and flexible. I feed magnetronic plastics — the stuff they make houses and ships of nowadays — into this moving arm. “It makes drawings in the air following drawings it scans with photo-cells. But plastic comes out of the end of the drawing arm and hardens as it comes. This thing will start at one end of a ship or a house and build it complete to the other end, following drawings only. “It’s ready to make a spaceship hull now. |
| Technovelgy from Things Pass By,
by Murray Leinster. Published by Thrilling Wonder Stories in 1945 Additional resources -
|
Here's a description of the machine in action:
A cable led to a table at the side of the shed,
where vivid lights showed upon drawings
pinned in the vision-range of scanners.
The arm made clumsy but precise gestures, following the drawings off to one
side. It had begun by putting a blob of magnetronic plastic on a stout upright at the end
of its steel track. Then, for a while, it made
gradually enlarging circles about that spot.
The result was rather remarkable, because plastic flowed through the hose to the
end of that moving arm, and as it came out
of the end it was shaped and hardened. It
formed a cone. The forming-arm, in fact,
simply poured out plastic as it described a
circle, and the plastic was hardened as it
emerged.
A cone resulted when the circles widened,
and the arm drew back. The process was
exactly that of an insect spinning a cocoon,
save that the result was no mass of gummed-together threads, but a solid wall of glass-
hard plastic, strong as steel, but vastly lighter. It was, moreover, practically a non-conductor of heat and electricity.
Presently the shape became more complex. The growing object ceased to be merely
a cone. Guided by drawings under the harsh
light of scanning-lamps, the constructor
built on. The cone swelled and curved.
The movements of the moving arm became
more complicated. It sealed off the cone with
a solid wall. Interior walls started from that.
There were openings in some of them. In
three hours, fifteen feet of the length of a
rounded hull had been made.
Braddick stopped the constructor and
fitted items of machinery into place. The
constructor took up its task again and sealed
the machines in as it built on further. The
hull swelled still more. Its interior design
became more complicated and more detailed.
The forming object grew more slowly. It
took six hours to make the second fifteen
feet. But the interior fittings and supplies
were in place for all the completed section.
From then on, the hull grew more slowly
still.
This video shows a prototype device that is an earth-bound version of a plastic constructor. Contour Crafting (CC) is basically a "house printer;" when supplied with the proper instructions, it will "print out" a complete shell of a house. Technovelgy readers should be familiar with the work of Dr. Behrokh Khoshnevis from a previous article (see Contour Crafting: 3D House Printer for additional details on how the technique actually works).
In the center of the big shed, the plastic
constructor worked tirelessly. It was an ungainly contrivance with an awkward-seeming arm mounted on a truck with motors
and pumps and a long hose trailing from it.
(Robotic Contour Crafting Video )
Compare to the idea behind the cosmic express from The Cosmic Express (1930) by Jack Williamson, however, for an early version of 3D printing as part of a teleportation idea. Compare also to Deposition (3D Printing) from Assassin (1978) by James P. Hogan.
Thanks to Eric for submitting this item, with quotes!
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Additional
resources:
More Ideas
and Technology from Things Pass By
More Ideas
and Technology by Murray Leinster
Tech news articles related to Things Pass By
Tech news articles related to works by Murray Leinster
Plastic Constructor (3D Printer)-related
news articles:
- Contour Crafting: 3D House Printer
- Sketch Furniture Ultra Rapid Prototyping
- Contour Crafting House Printer Nears Test
- 3D Printing Your Winter Reality
- World's First 3D Printed Villa
- CreoPop 3D Pen Draws In Midair
- Protopiper Lets You Sketch Full-Size Objects In Real Space
- XYZprinting 3D Pen Used, Reviewed By Terrible Artist
- 3D Cocooner From Festo Spins Web In Mid-Air
- 3D Printed Dubai Building Is World's Largest
- 3D Printing In Mid-Air
- Organic Non-Planar 3D Printing
| DARPA Wants 'Large Bio-Mechanical Space Structures' |
| Robot Bricklayer Or Passer-By Bricklayer? |
| Organic Non-Planar 3D Printing |
| Laser-Beam Welding In Orbital Factories |
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