Abstract
Polymers that solidify under light radiation are commonly used in digital light processing (DLP) 3D printing. A wide range of photopolymers use photoinitiators that react to radiation in range of ultraviolet (UV) wavelength. In the present study we provided measurement of radiant fluence in the UV wavelength range from 280 nm to 400 nm for two data projectors and compared effect of radiation on quality of 3D printing. One projector is commonly used DLP projector with high energy lamp. Second one is an industrial projector, in which RGB light emitting diodes (LEDs) are replaced by UV LEDs with wattage at the level of 3.6 % of the first one. Achieved data confirmed uneven distribution of radiant energy on illuminated area. These results validate, that undesired heating light causes internal stress inside built models that causes defects in final products.
Highlights
Additive manufacturing (AM) technology becomes more spread in prototyping and in a small quantity production
NASA uses it in space science for customizing tools, development of multifunction devices for life support and radiation shielding [1]
The main disadvantage of this method is necessity to have a full tank of photopolymer resin which is not cost-effective
Summary
Additive manufacturing (AM) technology becomes more spread in prototyping and in a small quantity production. It’s possible, because AM offers alternative approaches than traditional manufacturing. This method of production starts its history in 1986 from process called Stereolithography (SL) [2]. It used an UV laser for solidifying of photopolymer resins. Sony/DMEC company had started producing of commercial versions of SL printers in 1988 but stopped it just in 2007 [3]. Development of this technology raised mass production of photopolymer resins for SL. Machines were expensive and just few hundreds of them were sold
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
