A verification of the thermal stress analysis, including the furan sand mold, used to predict the thermal stress in castings

Motoyama, Yuichi; Inoue, Yuki; Saito, Gota; Yoshida, Makoto

doi:10.1016/j.jmatprotec.2013.06.024

Cited by 18 publications

(11 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among the various existing binders, foundries commonly use the organic furan binder in 3D printing machines for the mold manufacturing to cast light alloys [5,11,14,16,17,31]. A 3D printer manufactures molds by successive layers of deposited sand with the addition of a controlled amount of resin at the future mold positions.…”

mentioning

confidence: 99%

Investigation of process parameter effect on anisotropic properties of 3D printed sand molds

Coniglio

Sivarupan

Mansori

2017

Int J Adv Manuf Technol

View full text Add to dashboard Cite

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. ABSTRACTThe development of sand mold three-dimensional printing technologies enables the manufacturing of molds without the use of a physical model. However, the effects of the three-dimensional printing process parameters on the mold permeability and strength are not well known, leading the industries to keep old settings until castings have recurring defects. In the present work, the influence of these parameters was experimentally investigated to understand their effect on the mold strength and permeability. Cylindrical and bar-shaped test specimens were printed to perform respectively permeability and bending strength measurements. Experiments were designed to statistically quantify the individual and combined effect of these process parameters. While the binder quantity only affects the mold strength, increasing the recoater speed leads to both greater permeability and reduced strength due to the reduced sand compaction. Recommendations for optimizing some 3D printer settings are proposed to attain predefined mold properties and minimize the anisotropic behavior of the sand mold in regards to both the orientation and the position in the job box.

show abstract

mentioning

confidence: 99%

Investigation of process parameter effect on anisotropic properties of 3D printed sand molds

Coniglio

Sivarupan

Mansori

2017

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Critical regions in the casting due to core bending could be predicted. (Motoyama et al, 2013) investigated residual stresses of castings influenced by counter forces from furanic moulds applying specifically developed in-situ measurement of the transmitted loads. The material properties for modelling were obtained by compressive tests.…”

Section: Research On Sand Cores Under Thermal Loadmentioning

confidence: 99%

A miniature physical simulator for pilgering

Singh

Mahesh

Roy

et al. 2016

Journal of Materials Processing Technology

View full text Add to dashboard Cite

“…Indeed, greater binder contents generally result in higher values of mechanical strength, but also in more gas being produced during metal casting. Also, an excessively high amount of binder makes the 3DP sand mold too rigid impeding proper expansion and giving rise to hot tearing defects and high residual stresses [11,12]. In contrast, low binder amounts reduce the off-gassing but affect negatively the mechanical strength, which can lead to penetration of the molten metal into the large intersand interstices producing enlarged, rough surfaces on the casting.…”

Section: Introductionmentioning

confidence: 99%

On the rapid manufacturing process of functional 3D printed sand molds

Mitra

Castro

Mansori

2019

Journal of Manufacturing Processes

View full text Add to dashboard Cite

3D printing sand mold technology offers an opportunity for the foundry industry to rethink old casting approaches and to revive the manufacturing approach using computer models. One of the major concerns in sand molding using 3D printing is the functional characterization of the 3D printed molds as its mechanical and mass transport properties. This research paper discusses the effects of binder content on the mechanical strength and the permeability of 3DP sand molds at different curing conditions. The local permeability of the 3DP specimen was measured as a function of the injection flow rate in order to quantify the inertial pressure effects. The mechanical strength of the 3DP sand molds was characterized using traditional three-point bending strength measurements. The results show that the mechanical strength of the printed molds is deeply dependent on the amount of binder and the curing process. The 3PB strength was found to increase when cured at 100 °C and decrease when cured at 200 °C for all binder contents. The 3PB strength attains its maximum when cured at 100 °C for 2 hours for all binder content. In contrast, no significant effect of the amount of binder on the initial permeability of the samples before curing was observed within the functional range of binder mass fraction (1.02 to 1.98 %). Maximum permeability is attained at the same conditions as the 3PB strength. Therefore, the mechanical strength of the sample can be optimized within the investigated range of binder contents without resulting in any significant decrease in permeability.

show abstract

A verification of the thermal stress analysis, including the furan sand mold, used to predict the thermal stress in castings

Cited by 18 publications

References 11 publications

Investigation of process parameter effect on anisotropic properties of 3D printed sand molds

Investigation of process parameter effect on anisotropic properties of 3D printed sand molds

A miniature physical simulator for pilgering

On the rapid manufacturing process of functional 3D printed sand molds

Contact Info

Product

Resources

About