Back in 2011, China has developed a selective Laser Sintering machine with build volume of 1200mm x 1200mm. According to Dalian Municipal Government in China, Dalian University of Technology and Unit Science and Technology Development Co. Ltd. have recently developed a laser 3D printer with the maximum processing size of 1.8 m.
This laser 3D printer which can make casting moulds for large industrial prototypes with complex structures is now in its trial stage. The building area of this 3D printer reaches to 1.8 x 1.8 x 1.8 meter. With its unique technique of "contour scanning", this 3D printer will shorten processing time by 35% and reduce manufacturing costs by 40% compare to other types of laser 3D printers, according to the team.
Professor Yao Shan said that most 3D printers make parts by gradually accumulating the material in "point-line-plane-style", but their 3D printer only prints an outline of each layer to make the carbide of resin coated sand on the contour ineffective. Then they put the printed sand into a 180˚C furnace, a traditional method for curing and stripping to get a prototype or mold.
The processing time of this printing method is proportional to the unit of surface area of the part, while the processing time of traditional 3D printing is proportional to the volume of the part. This new type of 3D printing has greatly improved print efficiency, speeding up to 5~15 times that of the general 3D printers. The material for this printer is common coated sand for industrial use, which costs less than 1,000 Yuan ($163) per ton. This method can reduce the total cost and increase efficiency dramatically, says the team.
This new 3D printing, relying on making the outline ineffective, holds two national invention patents.
Posted in 3D Printers
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bob wrote at 8/7/2013 8:04:28 AM:
better late than never LOL
mahmoud wrote at 7/14/2013 12:46:15 AM:
Hello sir please i need 3D sand printer as soon as possible firstname.lastname@example.org
Paucus wrote at 7/3/2013 2:35:00 PM:
Where can we see more details of how it works? Any good links?
James wrote at 6/10/2013 3:31:32 PM:
OOoooo china is finally back in the innovation race, after hundreds of years. :D