Analysis of Shape and Dimensional Deformation of the Model with a Precision Circular Hole Produced by Digital Light Processing (DLP) Additive Technology

Abstract

The article is about manufacturing a component with a precision circular hole by Digital Light Processing (DLP) additive technology for inserting another part. The accuracy of the hole itself depends on the choice of production technology and the appropriate material. Deformation of the inner wall of the hole prevents correct insertion of the part - nut of trapezoidal threaded rod. This article analyzes the feasibility of manufacturing a component using Digital Light Processing (DLP) additive technology and the use of liquid resin „Proto GRY“ for the manufacture a component. Among additive technologies processes, digital light processing (DLP) is typically seen as the technology capable of reaching the highest standards in terms of part complexity and precision. DLP technology rely on the use of light, typically in the UV region of the spectrum (380 – 405 nm), to cure a photosensitive viscous resin. This resin, typically composed of epoxy or acrylic and methacrylic monomers, will polymerize and harden when exposed to light. As light shines on the vat to create specific shapes or patterns that compose each layer, a solid object can be formed and extracted from the otherwise liquid resin.

Effect of Support on Tensile Strength of Stereolithography Products

“…The SLA operation procedure is carried out as follows: In a photopolymer liquid tank, the print tray is submerged in a bath of liquid resin solution a fragile distance from the liquid surface (the tray is covered with a layer of liquid resin). The UV rays shine directly through the UV reflectors on the support tray, curing the liquid layer into a solid forming a precise cross-section of the part [2][3][4][5][6][7][8][9]. After each print layer is solidified, the print tray moves by one step, equal to the thickness of the print layer in the liquid, and the re-sweeping blade distributes the resin upwards in preparation for the formation of a new print layer.…”