TEMPERATURE EVALUATION AND BONDING QUALITY OF LARGE SCALE ADDITIVE MANUFACTURING THIN WALL PARTS

Abstract

In this study, thermal evaluation of ABS polymer thin wall part fabricated by large scale additive manufacturing is presented. The cooling of single bead layers, the interface temperature and the effect of adjacent top layer on the temperature of the previous layer were investigated. The experimentally measured temperatures were compared one dimensional heat transfer model of a single filament. The measured temperature values are in general agreement with the model until the adjacent top layer is going to be deposited. While the interface temperature was below the glass transition temperature at the beginning of the process, it was gradually increased with additional layers. The tension tests carried out using the specimens which were cut parallel and perpendicular to the building directions, showed mechanical anisotropy of the printed sample. The interlayer strength is about the half of the longitudinal strength of the printed sample, although interface temperature between adjacent layers was above the glass transition temperature and subsequent rolling was performed.

Keywords

• Additive manufacturing
• direct extrusion
• ABS
• large scale
• thermal imaging

References

1. [1] Talagani, M. R., DorMohammadi, S., Dutton, R, et al. Numerical Simulation of Big Area Additive Manufacturing (3D Printing) of a Full Size Car, SAMPE Journal, v. 51, no. 4, July/August, pp. 27-36, 2015.
2. [2] Kishore, V., Ajinjeru, C., Nycz, A., Post, B., Lindahl, J., Kunc, V., Duty, C., Infrared Preheating to Improve Interlayer Strength of Big Area Additive Manufacturing (BAAM) Components, Additive Manufacturing, 14,pp. 7-12, 2017.
3. [3] Duty, C. E., Kunc, V., Compton, B. G., Post, B. K. et al. Structure and Mechanical Behavior of Big Area Additive Manufacturing (BAAM) Materials, Rapid Prototyping J., 23, 1, pp. 181-189, 2017.
4. [4] Faes, M., Ferraris, E., Moens, D., Influence of Inter-layer Cooling Time on the Quasi-static Properties of ABS Components Produced via Fused Deposition Modelling, Procedia CIRP, 42, pp. 748-753, 2016.
5. [5] Sun, Q., Rizvi, G. M., Bellehumeur, C. T., Gu, P., Effect of Processing Conditions on The Bonding Quality FDM polymer Filaments, Rapid Prototyping J., v. 14, n 2, pp. 172-80, 2017.
6. [6] Sung, H. A., Montero, M., Odell, D., Roundy, S., Wright, P. K., Anisotropic Material Properties of Fused Deposition Modeling ABS, Rapid Prototyping J., v. 8, n 4, pp. 248-257, 2002.
7. [7] Yardımcı, M. A., Guceri, S., Conceptual Framework for the Thermal Process Modeling of Fused Deposition, Rapid Prototyping J., v. 2, n 2, pp. 26-31, 1996.
8. [8] Rodriguez-Matas, J. F. Modeling the Mechanical Behavior of Fused Deposition ABS Polymer Components, PhD Dissertation, department of Aerospace and Mechanical Engineering , Notre Dame, IN., 1999.

9. [9] Thomas, J. P., Rodriguez, J. F. Modeling the Fracture Strength Between Fused deposition extruded Rods, Solid Freeform Fabrication Symposium Proceedings, Austin, TX, USA, 2000.
10. [10 ] Li, L., Gu, P., Sun, Q., Bellehumeur, C., Modeling of Bond Formation in FDM Process, The Transactions of NAMRI/SME, v31, pp. 613-620, 2003.
11. [11] Shaffer, S. Yang, K., Vargas, J., Di Prima, M., Voit, W., On Reducing Anisotropy in 3D Printed polymers via Ionizing Radiation, Polymers, 55, pp. 5669-5679, 2014.
12. [12] Costa, S. F., Duarte, F. M., Covas, J. A., Estimation of Filament Temperature and Adhesion Development in Fused Deposition Techniques, J of Materials Processing Technology, 245, pp. 167-179, 2017.
13. [13] Compton, B. G., Post, B. K., Duty, C. E., Love, L., Kunc, V., Thermal Analysis of Additive Manufacturing of Large Scale Thermoplastic Polymer Composites, Additive Manufacturing, 17, pp. 77-86, 2017.
14. [14] Bellini, A., Fused deposition of Ceramics: A Study of Material Behavior, Fabrication Process and Equipment Design, PhD Thesis, Drexel University, Philadelphia, PA, 2002.