2 results listed
Molding process is one of the mostly used manufacturing techniques. Conventional molds are
generally made in woods. These are mostly produced by CNC machine. Small changes in the design
requires remolding. This takes time and costs a lot. Additive manufacturing (AM) may lower the
design and optimization costs. This study aims to compare prototyping costs between additive and
classical manufacturing techniques for producing mold of Agitator Propeller. The Computer Aided
Design (CAD) model were prepared using Autodesk Inventor Software. Then, the model was exported
as STL file format for rapid prototyping. Hypercube Evolution desktop type 3D printer with 90-300
microns layer height manufacturing capacity was used to produce the sample. The printer settings
were prepared with Cura software. Infill density and layer height of specimen were determined as 20%
and 200 microns, respectively. The heated bed temperature was selected as 60°C to increase bonding
and surface quality. The produced propellers were used as manufacturing the casting molds. The
model development using wood and 3D printing were compared in terms of technical and economical
aspects. Dimensional accuracy was measured with a caliper. The cost effectiveness analysis was
systematically conducted using Excel. The results from the cost-benefit analysis indicated that using
3D printers lowered the prototyping cost as much as three times.
International Congress on 3D Printing (Additive Manufacturing) Technologies and Digital Industry
3D-PTC2019
Pınar Demircioğlu
İsmail Böğrekçi
Neslihan Demir
Utku Köse
The aim of this study is to investigate the effect of the extrusion speed on surface roughness and
quality of the produced components with additive manufacturing technique. Computer Aided Design
(CAD) model of specimens were prepared using Autodesk Inventor Software. Then the models were
exported as STL file format for rapid prototyping. The specimens were produced with the dimensions
of 10x10x10 mm. Cube specimens were manufactured using Prusa İ3 desktop type 3D printer with the
90-300 microns layer height manufacturing capacity. The printing settings were prepared with
Simplified3D software. Layer heights were used as 200 microns for all samples. The heated bed
temperature was selected as 60°C to increase the bonding and surface quality. The extruder
temperature was set to 195°C. The samples were produced with the extrusion speeds of 20, 40, and 60
mm/s to determine the surface roughness and quality. Surface roughness of the specimens were
measured in micro-scale. The surface investigations were performed with a rotating Nipkow disc
confocal microscope (NanoFocus - µsurf) with the specifications of 1.6 µm spatial resolution, 0.04 nm
Z resolution and 3.1 mm Z range. According to the obtained results from surface roughness
measurements the relationship between extrusion speed and surface roughness of produced samples
were analyzed. The results showed that the lower extrusion speed the better surface roughness.
International Congress on 3D Printing (Additive Manufacturing) Technologies and Digital Industry
3D-PTC2019
Pınar Demircioğlu
İsmail Böğrekçi
H. Saygın Sucuoğlu
Neslihan Demir