Study of Forming Performance and Characterization of DLP 3D Printed Parts

Abstract

In order to explore the effect of printing parameter configurations on the forming performance of Digital Light Processing (DLP) 3D printed samples, printing experiments were carried out on the enhanced adhesion and efficient demolding of DLP 3D printing devices. The molding accuracy and mechanical properties of the printed samples with different thickness configurations were tested. The test results show that when the layer thickness increases from 0.02 mm to 0.22 mm, the dimensional accuracy in the X and Y directions increases first and then decreases, while the dimensional accuracy in the Z direction decreases, and the dimensional accuracy is the highest when the layer thickness is 0.1 mm. The mechanical properties of the samples decline with an increasing layer thickness of the samples. The mechanical properties of the 0.08 mm layer thickness are the best, and the tensile, bending, and impact properties are 22.86 Mpa, 48.4 Mpa, and 35.467 KJ/m2, respectively. Under the condition of ensuring molding accuracy, the optimal layer thickness of the printing device is determined to be 0.1 mm. The analysis of the section morphology of samples with different thicknesses illustrates that the fracture of the sample is a river-like brittle fracture, and there are no defects such as pores in the section of samples.

Surface-Wetting Characteristics of DLP-Based 3D Printing Outcomes under Various Printing Conditions for Microfluidic Device Fabrication

“…To create microfluidic systems with these 3D printing technologies and achieve the desired performance, fundamental research on the mechanical and physicochemical properties of photopolymerization-based printed products, based on the printing conditions, remains essential [ 18 , 19 ]. Several researchers have focused on the relationship between printing conditions and the mechanical properties of 3D-printed products in different printing methods [ 20 , 21 , 22 , 23 , 24 , 25 ]. For instance, Favero et al [ 20 ] evaluated the effect of layer height on accuracy when a model was created with a 3D printer, based on an SLA scheme.…”

“…Ouassil et al [ 24 ] studied the effect of printing speed on the porosity and tensile characteristics of fused filament 3D-printed materials. Jiang et al [ 25 ] investigated how layer thickness affected the mechanical characteristics and molding accuracy of 3D-printed samples using a DLP scheme. The majority of these prior studies, however, have concentrated on the effects of printing parameters on the mechanical characteristics of 3D-printed objects.…”

Additive Manufacturing in Australian Small to Medium Enterprises: Vat Polymerisation Techniques, Case Study and Pathways to Industry 4.0 Competitiveness

“…Similar to SLA, DLP employs a computer to slice a 3D component into 2D slices [2]. However, DLP projects the full sliced image onto the build area using a projector [31][32][33][34].…”

“…The printing platform is lifted, and the platform must move Similar to SLA, DLP employs a computer to slice a 3D component into 2D slices [2]. However, DLP projects the full sliced image onto the build area using a projector [31][32][33][34]. Figure 5 shows the process of bottom-up DLP printing, where the printing platform is immersed in the resin contained in the resin tank and sits one layer thickness above the release liner.…”

“…The projected image then passes through the transparent glass layer and further cures the resin [15]. The printing platform is lifted, and the platform must move vertically away from the liquid resin to allow for the next layer to be relocated by new resin flowing underneath and its settling evenly [15,31]. One of the drawbacks associated with the VP technique lies in its slow production speed due to the layer-by-layer approach to building the high-resolution print [14].…”