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HelicopterMain Discussion › carbon fiber 3d printing
02-17-2014 01:07 PM  3 years agoPost 1
JEEPWORLD2002/2

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Blue Bell, Pa

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check this out 3d printing reinforced with carbon fiber inproves strength by 2X and stiffness by 4X

http://www.fool.com/investing/gener...igantic-10.aspx

"The lab has developed a way to produce carbon fibers less than 500 nanometers in diameter. These fibers are small enough that they can be infused into the thermoplastic raw material. Conventional chopped carbon fibers are 5 to 7 micrometers, which is too thick to fit into the 0.25-inch diameter thermoplastic filament that is fed into fused deposition modeling machines. (Fused deposition modeling is one of Stratasys' two primary 3-D printing technologies.)

Adding 13% by volume of chopped carbon fiber to the thermoplastic raw material increases its strength by a factor of two and stiffness by a factor of four, and prevents parts from warping as they cool, according to Dr. Lonnie Love, group leader for automation, robotics and manufacturing at ORNL. This method can reportedly produce material strength on par with 600-series aluminum."

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02-18-2014 11:35 PM  3 years agoPost 2
AirWolfRC

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Conventional chopped carbon fibers are 5 to 7 micrometers, which is too thick to fit into the 0.25-inch diameter thermoplastic filament . . .
Now if they said 5 to 7 millimeters, I could understand . . . and agree
. . . but micrometers ? ?

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02-19-2014 01:49 AM  3 years agoPost 3
JEEPWORLD2002/2

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Blue Bell, Pa

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I assume 100 nano meters = 1 micro meter but I m only guessing h
I'll have to wiki search

1 Micrometer = 1.0E-4 Centimeters

1 Millimeter is equal to 1000 Micrometer
1 mm = 1000 um

Nanometer - A metric unit which equals to a 1/1,000,000,000 of a meter

Micrometer - A metric unit which equals to a 1/1,000,000 of a meter

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02-19-2014 02:05 AM  3 years agoPost 4
AirWolfRC

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A 1/4 in (0.25" ) is equal to 6,350 micrometers !

The article is saying 5 to 7 micrometers is too thick to fit into 6,350 micrometers ? !

Simply . . . the writer is an idiot.

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02-19-2014 07:11 AM  3 years agoPost 5
chickens2252

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Okinawa

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They mean that when you mix it 13% the mixture is to thick(viscus) to go through the 1/4" ejector orifice. Not the filaments themselves.

Tighten it tell it loosens then back it off a quarter

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02-19-2014 03:48 PM  3 years agoPost 6
AirWolfRC

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That would depend on the temperature of the plastic material being applied.

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